No Mesoscale Discussions are in effect as of Tue Aug 6 06:39:16 UTC 2024.

WW 0602 Status Updates
STATUS REPORT ON WW 602 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..DEAN..08/06/24 ATTN...WFO...CHS...ILM... STATUS REPORT FOR WT 602 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS SCC013-015-019-029-035-043-053-060740- SC . SOUTH CAROLINA COUNTIES INCLUDED ARE BEAUFORT BERKELEY CHARLESTON COLLETON DORCHESTER GEORGETOWN JASPER AMZ256-276-330-350-352-370-372-060740- CW . ADJACENT COASTAL WATERS INCLUDED ARE COASTAL WATERS FROM MURRELLS INLET TO SOUTH SANTEE RIVER SC OUT 20 NM WATERS FROM MURRELLS INLET NC TO SOUTH SANTEE RIVER SC FROM 20 TO 40 NM CHARLESTON HARBOR COASTAL WATERS FROM SOUTH SANTEE RIVER TO EDISTO BEACH SC OUT 20 NM Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0124 AM CDT Tue Aug 06 2024 Valid 061200Z - 071200Z ...Synopsis... ...Isolated Dry Thunderstorms... A shortwave trough will bring forcing for ascent into the northern and central Rockies today. Mid-level moisture above drier boundary-layer conditions will favor dry thunderstorm chances, with little wetting rainfall expected. Fuels from southwestern MT, southeastward into WY, eastern UT, and northwestern CO are sufficiently dry for new lightning ignitions. In addition, gusty and erratic outflow winds will be possible with any stronger storms that develop. ...Elevated Fire Weather, Snake River Plain Idaho... As the shortwave advances across the northern/central Rockies, a band of enhanced mid-level westerly flow will overspread portions of Idaho and Montana this afternoon. An increase in winds is expected across the Snake River Plain, where relative-humidity reductions to 10-15 percent will overlap sustained winds 15-20 mph. Occasional localized critical conditions may be possible. Overall, this looks to be too localized to include an area with this outlook. ..Thornton.. 08/06/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0124 AM CDT Tue Aug 06 2024 Valid 061200Z - 071200Z ...Synopsis... ...Isolated Dry Thunderstorms... A shortwave trough will bring forcing for ascent into the northern and central Rockies today. Mid-level moisture above drier boundary-layer conditions will favor dry thunderstorm chances, with little wetting rainfall expected. Fuels from southwestern MT, southeastward into WY, eastern UT, and northwestern CO are sufficiently dry for new lightning ignitions. In addition, gusty and erratic outflow winds will be possible with any stronger storms that develop. ...Elevated Fire Weather, Snake River Plain Idaho... As the shortwave advances across the northern/central Rockies, a band of enhanced mid-level westerly flow will overspread portions of Idaho and Montana this afternoon. An increase in winds is expected across the Snake River Plain, where relative-humidity reductions to 10-15 percent will overlap sustained winds 15-20 mph. Occasional localized critical conditions may be possible. Overall, this looks to be too localized to include an area with this outlook. ..Thornton.. 08/06/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC 0600Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1150 PM CDT Mon Aug 05 2024 Valid 071200Z - 081200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS WEDNESDAY AFTERNOON INTO WEDNESDAY NIGHT ACROSS PARTS OF COASTAL NORTH AND SOUTH CAROLINA...AND PARTS OF NORTHEASTERN COLORADO AND SOUTHEASTERN WYOMING INTO WESTERN NEBRASKA AND NORTHWESTERN KANSAS... ...SUMMARY... A few strong thunderstorms may impact parts of the coastal Carolinas, and parts of the Front Range into adjacent Great Plains, Wednesday afternoon into Wednesday night, accompanied by at least some risk for severe weather. ...Synopsis... Mid-level troughing across the Canadian Prairies through adjacent international border area may make some progress into the northern U.S. Great Plains during this period, while also elongating westward across British Columbia, between one prominent ridge centered across the Canadian Northwest Territories and another across the southern U.S. Great Basin into the southern Great Plains. Downstream, mid-level heights are generally forecast to rise across much of Quebec, the Canadian Maritimes and northern New England, as significant troughing finally begins to shift east of the region. However, one more significant impulse is forecast to dig south-southwestward across southern Hudson Bay by late Wednesday night. Across the Southeast and southern mid- to subtropical Atlantic, developments remain a bit more unclear. Considerable spread remains evident concerning west-northwestward development of the western Atlantic ridge, and its potential influence on what is currently still forecast to be a tropical storm offshore of the South Carolina coast at 12Z Wednesday. ...Carolinas/Southeastern Georgia... Due to the slow moving nature of the remnant tropical cyclone and the uncertainty concerning its track, tornado potential for Wednesday through Wednesday night remains unclear. However, based on the current official forecast intensity and track of Debby, low tornado probabilities may mostly focus near and perhaps just inland of southern North Carolina coastal areas, as the low-level circulation center begins to slowly accelerate northeastward and northward late Wednesday through Wednesday night. ...Front Range into adjacent Great Plains... It now appears that stronger boundary-layer destabilization (including CAPE on the order of 1500-2000 J/kg by late afternoon) will mostly focus within lee surface troughing across parts of northwestern Kansas and western Nebraska into the Cheyenne Ridge vicinity. And models seem increasingly suggestive that large-scale forcing for ascent may support the initiation of storms off the higher terrain to the west and southwest, into an initially more strongly heated and deeply mixed boundary layer. Aided by strong shear associated with strengthening westerly mid/upper flow (including 35 to 40+ kt around 500 mb), convection may tend to grow upscale and organize as surface cold pools strengthen and consolidate, with potential for further intensification into Wednesday evening as it progress into the better instability. Damaging winds and large hail may accompany this convection, and it is possible that severe probabilities could be increased in later outlooks for this period. ..Kerr.. 08/06/2024 Read more

SPC 0600Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1150 PM CDT Mon Aug 05 2024 Valid 071200Z - 081200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS WEDNESDAY AFTERNOON INTO WEDNESDAY NIGHT ACROSS PARTS OF COASTAL NORTH AND SOUTH CAROLINA...AND PARTS OF NORTHEASTERN COLORADO AND SOUTHEASTERN WYOMING INTO WESTERN NEBRASKA AND NORTHWESTERN KANSAS... ...SUMMARY... A few strong thunderstorms may impact parts of the coastal Carolinas, and parts of the Front Range into adjacent Great Plains, Wednesday afternoon into Wednesday night, accompanied by at least some risk for severe weather. ...Synopsis... Mid-level troughing across the Canadian Prairies through adjacent international border area may make some progress into the northern U.S. Great Plains during this period, while also elongating westward across British Columbia, between one prominent ridge centered across the Canadian Northwest Territories and another across the southern U.S. Great Basin into the southern Great Plains. Downstream, mid-level heights are generally forecast to rise across much of Quebec, the Canadian Maritimes and northern New England, as significant troughing finally begins to shift east of the region. However, one more significant impulse is forecast to dig south-southwestward across southern Hudson Bay by late Wednesday night. Across the Southeast and southern mid- to subtropical Atlantic, developments remain a bit more unclear. Considerable spread remains evident concerning west-northwestward development of the western Atlantic ridge, and its potential influence on what is currently still forecast to be a tropical storm offshore of the South Carolina coast at 12Z Wednesday. ...Carolinas/Southeastern Georgia... Due to the slow moving nature of the remnant tropical cyclone and the uncertainty concerning its track, tornado potential for Wednesday through Wednesday night remains unclear. However, based on the current official forecast intensity and track of Debby, low tornado probabilities may mostly focus near and perhaps just inland of southern North Carolina coastal areas, as the low-level circulation center begins to slowly accelerate northeastward and northward late Wednesday through Wednesday night. ...Front Range into adjacent Great Plains... It now appears that stronger boundary-layer destabilization (including CAPE on the order of 1500-2000 J/kg by late afternoon) will mostly focus within lee surface troughing across parts of northwestern Kansas and western Nebraska into the Cheyenne Ridge vicinity. And models seem increasingly suggestive that large-scale forcing for ascent may support the initiation of storms off the higher terrain to the west and southwest, into an initially more strongly heated and deeply mixed boundary layer. Aided by strong shear associated with strengthening westerly mid/upper flow (including 35 to 40+ kt around 500 mb), convection may tend to grow upscale and organize as surface cold pools strengthen and consolidate, with potential for further intensification into Wednesday evening as it progress into the better instability. Damaging winds and large hail may accompany this convection, and it is possible that severe probabilities could be increased in later outlooks for this period. ..Kerr.. 08/06/2024 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1231 AM CDT Tue Aug 06 2024 Valid 061200Z - 071200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE MIDWEST TO THE MID-ATLANTIC...OVER MONTANA INTO WESTERN SOUTH DAKOTA...AND PARTS OF CENTRAL/SOUTHERN ARIZONA... ...SUMMARY... Scattered strong storms are likely over much of Montana into western South Dakota, as well as from parts of Ohio into New Jersey, and across parts of Arizona. ...MI/IN/OH into the Northern Mid-Atlantic Vicinity... A convectively enhanced shortwave impulse will track east from southern Lake Michigan to southern New England today into this evening. Enhanced midlevel flow associated with this feature will overspread the region. At the surface, a stalled boundary will extend west to east from northern IN/OH into central PA and eventually offshore in the vicinity of Long Island. An MCV is forecast to shift east along this boundary today into this evening. A very moist airmass is in place, and surface dewpoints in the low to possibly mid-70s F are expected to contribute to moderate to strong instability. Forecast soundings depict steepening low-level lapse rates and PW values near 2 inches. Furthermore, supercell wind profiles are evident. Low-level hodographs will be somewhat enlarged and favorably curved in the vicinity of the surface boundary and near the eastward-developing MCV. This will support a risk for a few tornadoes from northern OH into western PA. Otherwise, cells/clusters will pose a risk for damaging gusts and marginal hail across a broader area within the theta-e gradient/surface boundary from IN to the northern Mid-Atlantic coast. With time, and aided enhanced ascent from the MCV, one or more bowing segments may develop. If this occurs, damaging-wind potential could increase across portions of the area. ...Northern Rockies to the Northern High Plains... An upper shortwave trough will develop south over western Canada and the northern Rockies. This will flatten the upper ridge oriented over the MT and the Dakotas and result in increasing mid/upper westerly flow across the region. Cooling aloft will foster steep midlevel lapse rates, while increasing midlevel moisture further aids in weak to moderate destabilization over the region (MLCAPE 500-1500 J/kg). Initial convection is forecast to develop over the higher terrain of western MT by early/mid afternoon. Around 25-35 kt effective shear magnitudes will support organized cells. Meanwhile, cooling midlevel temperatures and elongated/straight hodographs should support isolated large hail with initial discrete storms. With time, clustering and outflow consolidation is expected as convection shifts east into central/eastern MT and eventually the western Dakotas during the evening. Steep low-level lapse rates and deeply mixed boundary layer will support strong to severe outflow gusts with this activity. ...Central/Southern AZ... Midlevel easterly flow will increase to around 20-25 kt as a weak impulse migrates westward near the AZ/Mexican border. Steep low to midlevel lapse rates and nearly 1.5 inch PW values will support MLCAPE around 1500-2000 J/kg amid 30 kt effective shear magnitudes. Initial thunderstorm development is expected over higher terrain by early to mid-afternoon. With time, clustering and outflow consolidation should result in westward propagating convection posing a risk for severe gusts into the evening. ...Coastal Carolinas... Tropical Storm Debby will not move much today, remaining near coastal SC. Overall tornado potential appears somewhat less compared to the previous couple of days, as widespread heavy rain will limit low-level destabilization. However, enhanced low-level shear within the eastern semicircle may support a low risk for a tornado or two across portions of coastal SC and southeast NC. ...Central High Plains... A post-frontal upslope flow regime will maintain modest boundary-layer moisture across the central High Plains vicinity. Strong heating and steep midlevel lapse rates will support MLCAPE to around 1500 J/kg. While deep-layer flow will remain modest, vertically veering wind profiles will provide sufficient shear for semi-organized cells. Convection will develop near higher terrain by 18-20z and spread east into the adjacent plains through the evening. This activity will pose a risk for marginal wind/hail before weakening after sunset. ..Leitman/Thornton.. 08/06/2024 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1231 AM CDT Tue Aug 06 2024 Valid 061200Z - 071200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE MIDWEST TO THE MID-ATLANTIC...OVER MONTANA INTO WESTERN SOUTH DAKOTA...AND PARTS OF CENTRAL/SOUTHERN ARIZONA... ...SUMMARY... Scattered strong storms are likely over much of Montana into western South Dakota, as well as from parts of Ohio into New Jersey, and across parts of Arizona. ...MI/IN/OH into the Northern Mid-Atlantic Vicinity... A convectively enhanced shortwave impulse will track east from southern Lake Michigan to southern New England today into this evening. Enhanced midlevel flow associated with this feature will overspread the region. At the surface, a stalled boundary will extend west to east from northern IN/OH into central PA and eventually offshore in the vicinity of Long Island. An MCV is forecast to shift east along this boundary today into this evening. A very moist airmass is in place, and surface dewpoints in the low to possibly mid-70s F are expected to contribute to moderate to strong instability. Forecast soundings depict steepening low-level lapse rates and PW values near 2 inches. Furthermore, supercell wind profiles are evident. Low-level hodographs will be somewhat enlarged and favorably curved in the vicinity of the surface boundary and near the eastward-developing MCV. This will support a risk for a few tornadoes from northern OH into western PA. Otherwise, cells/clusters will pose a risk for damaging gusts and marginal hail across a broader area within the theta-e gradient/surface boundary from IN to the northern Mid-Atlantic coast. With time, and aided enhanced ascent from the MCV, one or more bowing segments may develop. If this occurs, damaging-wind potential could increase across portions of the area. ...Northern Rockies to the Northern High Plains... An upper shortwave trough will develop south over western Canada and the northern Rockies. This will flatten the upper ridge oriented over the MT and the Dakotas and result in increasing mid/upper westerly flow across the region. Cooling aloft will foster steep midlevel lapse rates, while increasing midlevel moisture further aids in weak to moderate destabilization over the region (MLCAPE 500-1500 J/kg). Initial convection is forecast to develop over the higher terrain of western MT by early/mid afternoon. Around 25-35 kt effective shear magnitudes will support organized cells. Meanwhile, cooling midlevel temperatures and elongated/straight hodographs should support isolated large hail with initial discrete storms. With time, clustering and outflow consolidation is expected as convection shifts east into central/eastern MT and eventually the western Dakotas during the evening. Steep low-level lapse rates and deeply mixed boundary layer will support strong to severe outflow gusts with this activity. ...Central/Southern AZ... Midlevel easterly flow will increase to around 20-25 kt as a weak impulse migrates westward near the AZ/Mexican border. Steep low to midlevel lapse rates and nearly 1.5 inch PW values will support MLCAPE around 1500-2000 J/kg amid 30 kt effective shear magnitudes. Initial thunderstorm development is expected over higher terrain by early to mid-afternoon. With time, clustering and outflow consolidation should result in westward propagating convection posing a risk for severe gusts into the evening. ...Coastal Carolinas... Tropical Storm Debby will not move much today, remaining near coastal SC. Overall tornado potential appears somewhat less compared to the previous couple of days, as widespread heavy rain will limit low-level destabilization. However, enhanced low-level shear within the eastern semicircle may support a low risk for a tornado or two across portions of coastal SC and southeast NC. ...Central High Plains... A post-frontal upslope flow regime will maintain modest boundary-layer moisture across the central High Plains vicinity. Strong heating and steep midlevel lapse rates will support MLCAPE to around 1500 J/kg. While deep-layer flow will remain modest, vertically veering wind profiles will provide sufficient shear for semi-organized cells. Convection will develop near higher terrain by 18-20z and spread east into the adjacent plains through the evening. This activity will pose a risk for marginal wind/hail before weakening after sunset. ..Leitman/Thornton.. 08/06/2024 Read more

WW 0601 Status Updates
STATUS REPORT ON WW 601 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 ESE JVL TO 35 WSW RFD TO 25 SE DBQ. ..GOSS..08/06/24 ATTN...WFO...LOT...DVN...MKX... STATUS REPORT FOR WS 601 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC015-085-177-060540- IL . ILLINOIS COUNTIES INCLUDED ARE CARROLL JO DAVIESS STEPHENSON WIC045-049-065-105-060540- WI . WISCONSIN COUNTIES INCLUDED ARE GREEN IOWA LAFAYETTE ROCK THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 601 SEVERE TSTM IL IN WI 052250Z - 060500Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 601 NWS Storm Prediction Center Norman OK 550 PM CDT Mon Aug 5 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northern Illinois Northwest Indiana Southern Wisconsin * Effective this Monday afternoon from 550 PM until Midnight CDT. * Primary threats include... Scattered damaging wind gusts to 65 mph possible Scattered large hail events to 1.5 inches in diameter possible A tornado or two possible SUMMARY...Isolated to scattered strong to severe thunderstorms are forecast this evening. A few of the stronger storms may evolve into supercells posing a risk for large hail (1 to 1.5 inches in diameter), severe gusts, and perhaps a tornado. Strong to severe multicells are forecast near the Indiana and Illinois border this evening. A localized risk for hail and wind may accompany these storms. By later this evening, other storms may develop and move into western parts of the Watch and yield a threat for locally damaging gusts and perhaps large hail. The severe thunderstorm watch area is approximately along and 45 statute miles north and south of a line from 70 miles west northwest of Rockford IL to 85 miles east southeast of Marseilles IL. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU1). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 597...WW 598...WW 599...WW 600... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 55 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 27020. ...Smith Read more

WW 0600 Status Updates
STATUS REPORT ON WW 600 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 E ALO TO 20 N ALO TO 30 WNW LNR TO 15 SSW VOK. ..GOSS..08/06/24 ATTN...WFO...ARX...DMX...DVN...FSD...MPX... STATUS REPORT FOR WT 600 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC019-043-055-061-065-060540- IA . IOWA COUNTIES INCLUDED ARE BUCHANAN CLAYTON DELAWARE DUBUQUE FAYETTE WIC023-043-103-060540- WI . WISCONSIN COUNTIES INCLUDED ARE CRAWFORD GRANT RICHLAND THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0599 Status Updates
STATUS REPORT ON WW 599 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..GOSS..08/06/24 ATTN...WFO...CHS... STATUS REPORT FOR WT 599 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS GAC029-051-103-179-183-191-060540- GA . GEORGIA COUNTIES INCLUDED ARE BRYAN CHATHAM EFFINGHAM LIBERTY LONG MCINTOSH SCC013-015-019-029-035-049-053-060540- SC . SOUTH CAROLINA COUNTIES INCLUDED ARE BEAUFORT BERKELEY CHARLESTON COLLETON DORCHESTER HAMPTON JASPER AMZ330-350-352-354-370-372-374-060540- CW . ADJACENT COASTAL WATERS INCLUDED ARE CHARLESTON HARBOR Read more

MD 1834 CONCERNING TORNADO WATCH 600... FOR FAR SOUTHEASTERN MINNESOTA...NORTHEASTERN IOWA...SOUTHWESTERN WISCONSIN
Mesoscale Discussion 1834 NWS Storm Prediction Center Norman OK 0940 PM CDT Mon Aug 05 2024 Areas affected...far southeastern Minnesota...northeastern Iowa...southwestern Wisconsin Concerning...Tornado Watch 600... Valid 060240Z - 060345Z The severe weather threat for Tornado Watch 600 continues. SUMMARY...Tornado and damaging wind risk to continue within WW600 and WW601. DISCUSSION...A line of storms with embedded supercell structures continues southeastward across far southeast MN into northeastern IA. Conditions remain favorable for a tornado or two, given effective SRH around 400 m2/s2 across northeast IA into southwestern WI. This will likely be the most favorable corridor for potential tornado development in the short term. With further linear evolution expected, potential for damaging winds will continue as this broken line advances southeastward into portions of Wisconsin and northern Illinois through the late evening. ..Thornton.. 08/06/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...MKX...DVN...ARX...DMX... LAT...LON 42439190 42509223 42619256 42889301 43249280 43589224 43739196 43829118 43729067 43679034 43058969 42918961 42688968 42568970 42319031 42329091 42349149 42439190 Read more

WW 0601 Status Updates
STATUS REPORT ON WW 601 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1834 ..THORNTON..08/06/24 ATTN...WFO...LOT...DVN...MKX... STATUS REPORT FOR WS 601 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC015-085-177-060340- IL . ILLINOIS COUNTIES INCLUDED ARE CARROLL JO DAVIESS STEPHENSON WIC045-049-065-105-060340- WI . WISCONSIN COUNTIES INCLUDED ARE GREEN IOWA LAFAYETTE ROCK THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0600 Status Updates
STATUS REPORT ON WW 600 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 ESE FOD TO 45 SSE RST TO 15 NW LSE. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1834 ..THORNTON..08/06/24 ATTN...WFO...ARX...DMX...DVN...FSD...MPX... STATUS REPORT FOR WT 600 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC005-013-017-019-023-037-043-055-061-065-191-060340- IA . IOWA COUNTIES INCLUDED ARE ALLAMAKEE BLACK HAWK BREMER BUCHANAN BUTLER CHICKASAW CLAYTON DELAWARE DUBUQUE FAYETTE WINNESHIEK MNC055-060340- MN . MINNESOTA COUNTIES INCLUDED ARE HOUSTON WIC023-043-103-123-060340- WI . WISCONSIN COUNTIES INCLUDED ARE Read more

WW 600 TORNADO IA MN WI 052225Z - 060500Z
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 600 NWS Storm Prediction Center Norman OK 525 PM CDT Mon Aug 5 2024 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Northern Iowa Southern Minnesota Southwest Wisconsin * Effective this Monday afternoon from 525 PM until Midnight CDT. * Primary threats include... A few tornadoes possible Scattered large hail likely with isolated very large hail events to 2.5 inches in diameter possible Scattered damaging wind gusts to 70 mph likely SUMMARY...Thunderstorms are forecast to intensify this evening with several supercells expected to evolve from the initial thunderstorm activity over southern Minnesota. A tornado risk may accompany any established and mature supercell. The risk for large to very large hail (1 to 2.5 inches in diameter) and severe gusts (60-70 mph) will also increase this evening. Upscale growth into a linear cluster is forecast later this evening with the severe threat transitioning to mainly a wind risk, with perhaps a lingering tornado threat. The tornado watch area is approximately along and 50 statute miles north and south of a line from 45 miles north northwest of Spencer IA to 45 miles north northeast of Dubuque IA. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU0). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. && OTHER WATCH INFORMATION...CONTINUE...WW 597...WW 598...WW 599... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 29030. ...Smith Read more

WW 0599 Status Updates
STATUS REPORT ON WW 599 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..GOSS..08/06/24 ATTN...WFO...CHS... STATUS REPORT FOR WT 599 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS GAC029-051-103-179-183-191-060240- GA . GEORGIA COUNTIES INCLUDED ARE BRYAN CHATHAM EFFINGHAM LIBERTY LONG MCINTOSH SCC013-015-019-029-035-049-053-060240- SC . SOUTH CAROLINA COUNTIES INCLUDED ARE BEAUFORT BERKELEY CHARLESTON COLLETON DORCHESTER HAMPTON JASPER AMZ330-350-352-354-370-372-374-060240- CW . ADJACENT COASTAL WATERS INCLUDED ARE CHARLESTON HARBOR Read more

WW 599 TORNADO GA SC CW 051940Z - 060500Z
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 599 NWS Storm Prediction Center Norman OK 340 PM EDT Mon Aug 5 2024 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Southeast Georgia Georgia Coastal South Carolina Coastal Waters * Effective this Monday afternoon and Tuesday morning from 340 PM until 100 AM EDT. * Primary threats include... A couple tornadoes possible SUMMARY...Scattered thunderstorms moving ashore ahead of the TS Debby might could result in an isolated tornado or two through the evening. The tornado watch area is approximately along and 45 statute miles either side of a line from 50 miles south southwest of Savannah GA to 45 miles east northeast of Charleston SC. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU9). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. && OTHER WATCH INFORMATION...CONTINUE...WW 596...WW 597...WW 598... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 0.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 14035. ...Hart Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0746 PM CDT Mon Aug 05 2024 Valid 060100Z - 061200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS SOUTHEAST MINNESOTA AND NORTHEAST IOWA INTO SOUTHERN WISCONSIN AND NORTHERN ILLINOIS... ...SUMMARY... Severe thunderstorms will continue into tonight across southeast Minnesota and northeast Iowa eastward toward the southern Lake Michigan vicinity. A few strong wind gusts remain possible across the northern Rockies, and a couple of tornadoes associated with Tropical Storm Debbie remain possible across southeast Georgia into coastal South Carolina. ...Northeast and Upper Ohio Valley... Severe thunderstorm potential has largely waned this evening as the loss of daytime heating results in boundary layer stabilization. As such, severe probabilities have been removed. ...Upper Midwest vicinity... Initial supercell storms over southern MN are currently transitioning toward a more linear/bowing storm mode an a midlevel shortwave trough continues to shift east/southeast across the Upper Midwest this evening. This activity will continue to shift east/southeast along and to the cool side of a warm front draped across IA into northern IL. A 25-30 kt southwesterly low-level jet noted around 850 mb orient orthogonal to the low-level theta-e gradient will promote scale development into tonight. A short term tornado risk will persist before a transition toward more of a damaging gust risk. ...Northern Rockies... Isolated to widely scattered thunderstorms are ongoing this evening. Moderate to strong vertical shear will support strong to sporadic severe storms amid modest instability and steep boundary-layer lapse rates. A couple of the stronger, longer lived updrafts also could produce marginal hail. ...Southeast GA and Coastal SC... A couple of tornadoes remain possible overnight as Tropical Storm Debbie shifts slowly northward. See MCD 1832 for more details on this continued risk. ..Leitman.. 08/06/2024 Read more

MD 1831 CONCERNING TORNADO WATCH 600... FOR SOUTHERN MINNESOTA
Mesoscale Discussion 1831 NWS Storm Prediction Center Norman OK 0659 PM CDT Mon Aug 05 2024 Areas affected...southern Minnesota Concerning...Tornado Watch 600... Valid 052359Z - 060100Z The severe weather threat for Tornado Watch 600 continues. SUMMARY...Tornado risk continues within WW600. Localized damaging wind threat may increase in the next hour. DISCUSSION...A cluster of supercells is currently moving southeastward across portions of southern MN. These cells have a history of producing tornadoes and large hail (up to 1.5 inches in diameter). The risk for tornadoes will continue in the short term with these cells, with MPX VAD indicating 0-3 km SRH 430 m2/s2. These cells are also producing very heavy precipitation, with the potential for evaporative cooling and strong outflow winds increasing as cells evolve into a more linear mode. Isolated damaging gusts 65-80 mph are possible. ..Thornton.. 08/05/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...ARX...MPX...DMX... LAT...LON 44159340 43969414 43639410 43089325 42959244 42929213 43019192 43209171 43419155 43749161 43919173 44159340 Read more