WW 0631 Status Updates
STATUS REPORT ON WW 631 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 NNW RDM TO 20 SE PDX TO 30 NW PDX. ..SQUITIERI..08/18/24 ATTN...WFO...MFR...EKA...PQR...PDT... STATUS REPORT FOR WS 631 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ORC017-027-029-180240- OR . OREGON COUNTIES INCLUDED ARE DESCHUTES HOOD RIVER JACKSON WAC011-059-180240- WA . WASHINGTON COUNTIES INCLUDED ARE CLARK SKAMANIA 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 631 SEVERE TSTM CA OR WA 172020Z - 180400Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 631 NWS Storm Prediction Center Norman OK 120 PM PDT Sat Aug 17 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northern California Western Oregon Southwest Washington * Effective this Saturday afternoon and evening from 120 PM until 900 PM PDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Scattered large hail events to 1.5 inches in diameter possible SUMMARY...Thunderstorms will intensify this afternoon along and west of the Cascade Range, tracking northward across the watch area. A few severe storms are expected, capable of large hail and locally damaging wind gusts. The severe thunderstorm watch area is approximately along and 35 statute miles east and west of a line from 65 miles south southwest of Mount Shasta CA to 60 miles north northeast of Portland OR. 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 630... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 20030. ...Hart Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0745 PM CDT Sat Aug 17 2024 Valid 180100Z - 181200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ALONG/JUST EAST OF THE WASHINGTON/OREGON CASCADES... ...SUMMARY... Scattered severe thunderstorms will spread across portions of southwest Washington this evening. Hail/wind remain possible. Isolated damaging gusts are also expected with convection across portions of the southern Appalachians into the Ohio Valley. ...01z Update... Notable short-wave trough is currently ejecting north across northern CA into western OR. Water-vapor imagery also suggests a lead disturbance may be associated with a fairly extensive cluster of deep convection as it advances across northern OR into southwest WA. Surface temperatures are holding in the lower 90s across lower elevations of southern WA east of the Cascades. Latest diagnostic data suggests a narrow corridor of higher instability extends along/just east of the Cascades. While convection should spread/develop north along the higher terrain, northeasterly low-level flow should contribute to robust updrafts capable of generating hail/wind. Northwesterly flow is deepening across the southern Appalachians early this evening as the upper trough progresses steadily east. A broken band of organized convection is propagating southeast across northwestern SC/northern GA through an axis of instability characterized by 1500 MLCAPE. This activity may produce locally damaging gusts for the next few hours, but otherwise will gradually decrease in intensity as boundary layer cools this evening. More isolated convection is observed across KY into the upper OH Valley. This activity will also gradually wane in intensity as the evening progresses and low-level lapse rates weaken. Until then, a few gusts may be noted. ..Darrow.. 08/18/2024 Read more

MD 1937 CONCERNING SEVERE THUNDERSTORM WATCH 632... FOR CENTRAL GEORGIA
Mesoscale Discussion 1937 NWS Storm Prediction Center Norman OK 0721 PM CDT Sat Aug 17 2024 Areas affected...Central Georgia Concerning...Severe Thunderstorm Watch 632... Valid 180021Z - 180115Z The severe weather threat for Severe Thunderstorm Watch 632 continues. SUMMARY...Isolated wind-damage threat may persist for another hour or so before diminishing. DISCUSSION...Surface cooling is underway with sunset, which will result in a gradual decrease in surface-based buoyancy in the warm sector ahead of the ongoing convection across GA. However, a storm-scale merger of a more east-west band with a more north-south cluster from the west will locally boost updraft intensity into parts of the Atlanta metro area for the next 1 hour or so, which will help maintain some threat for additional wind damage. Thereafter, storms are expected to weaken and the severe threat will diminish. ..Thompson.. 08/18/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...FFC... LAT...LON 33118384 33198439 33268482 33498488 33478418 33528373 33398362 33198363 33118384 Read more

WW 0630 Status Updates
STATUS REPORT ON WW 630 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 55 E ELY TO 30 NE U24 TO 30 NNW PUC TO 45 N EVW. ..LYONS..08/17/24 ATTN...WFO...SLC... STATUS REPORT FOR WS 630 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS UTC001-007-013-015-017-021-025-027-031-039-041-053-055-172240- UT . UTAH COUNTIES INCLUDED ARE BEAVER CARBON DUCHESNE EMERY GARFIELD IRON KANE MILLARD PIUTE SANPETE SEVIER WASHINGTON WAYNE 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 0630 Status Updates
STATUS REPORT ON WW 630 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 55 E ELY TO 30 NE U24 TO 30 NNW PUC TO 45 N EVW. ..LYONS..08/17/24 ATTN...WFO...SLC... STATUS REPORT FOR WS 630 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS UTC001-007-013-015-017-021-025-027-031-039-041-053-055-172240- UT . UTAH COUNTIES INCLUDED ARE BEAVER CARBON DUCHESNE EMERY GARFIELD IRON KANE MILLARD PIUTE SANPETE SEVIER WASHINGTON WAYNE 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 630 SEVERE TSTM UT WY 171850Z - 180100Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 630 NWS Storm Prediction Center Norman OK 1250 PM MDT Sat Aug 17 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Western and Central Utah Southwest Wyoming * Effective this Saturday afternoon and evening from 1250 PM until 700 PM MDT. * Primary threats include... Scattered damaging wind gusts to 70 mph likely Isolated large hail events to 1.5 inches in diameter possible SUMMARY...Clusters of thunderstorms will spread across much of Utah this afternoon and early evening, posing a risk of locally damaging wind gusts and hail. The severe thunderstorm watch area is approximately along and 70 statute miles east and west of a line from 40 miles east of Saint George UT to 25 miles northeast of Salt Lake City UT. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU0). 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. && AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 23030. ...Hart Read more

WW 0631 Status Updates
STATUS REPORT ON WW 631 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..LYONS..08/17/24 ATTN...WFO...MFR...EKA...PQR...PDT... STATUS REPORT FOR WS 631 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS CAC093-105-172340- CA . CALIFORNIA COUNTIES INCLUDED ARE SISKIYOU TRINITY ORC005-017-019-027-029-039-043-047-051-172340- OR . OREGON COUNTIES INCLUDED ARE CLACKAMAS DESCHUTES DOUGLAS HOOD RIVER JACKSON LANE LINN MARION MULTNOMAH WAC011-059-172340- WA . WASHINGTON COUNTIES INCLUDED ARE CLARK SKAMANIA Read more

WW 0632 Status Updates
STATUS REPORT ON WW 632 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 E HSV TO 15 NNE RMG TO 50 ENE RMG TO 65 S TYS TO 30 WSW AVL. ..LYONS..08/17/24 ATTN...WFO...BMX...FFC...GSP...MRX... STATUS REPORT FOR WS 632 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ALC015-019-027-029-055-111-115-121-172340- AL . ALABAMA COUNTIES INCLUDED ARE CALHOUN CHEROKEE CLAY CLEBURNE ETOWAH RANDOLPH ST. CLAIR TALLADEGA GAC011-013-015-045-055-057-059-067-085-089-097-105-115-117-119- 121-129-135-137-139-143-147-157-187-195-219-221-223-227-233-241- 247-257-281-291-297-311-317-172340- GA . GEORGIA COUNTIES INCLUDED ARE BANKS BARROW BARTOW CARROLL CHATTOOGA CHEROKEE CLARKE COBB DAWSON DEKALB DOUGLAS ELBERT FLOYD FORSYTH FRANKLIN FULTON GORDON GWINNETT HABERSHAM HALL HARALSON HART JACKSON LUMPKIN Read more

WW 0632 Status Updates
STATUS REPORT ON WW 632 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 E HSV TO 15 NNE RMG TO 50 ENE RMG TO 65 S TYS TO 30 WSW AVL. ..LYONS..08/17/24 ATTN...WFO...BMX...FFC...GSP...MRX... STATUS REPORT FOR WS 632 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ALC015-019-027-029-055-111-115-121-172340- AL . ALABAMA COUNTIES INCLUDED ARE CALHOUN CHEROKEE CLAY CLEBURNE ETOWAH RANDOLPH ST. CLAIR TALLADEGA GAC011-013-015-045-055-057-059-067-085-089-097-105-115-117-119- 121-129-135-137-139-143-147-157-187-195-219-221-223-227-233-241- 247-257-281-291-297-311-317-172340- GA . GEORGIA COUNTIES INCLUDED ARE BANKS BARROW BARTOW CARROLL CHATTOOGA CHEROKEE CLARKE COBB DAWSON DEKALB DOUGLAS ELBERT FLOYD FORSYTH FRANKLIN FULTON GORDON GWINNETT HABERSHAM HALL HARALSON HART JACKSON LUMPKIN Read more

WW 632 SEVERE TSTM AL GA NC SC 172045Z - 180200Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 632 NWS Storm Prediction Center Norman OK 445 PM EDT Sat Aug 17 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northeast Alabama Northern Georgia Western North Carolina Western South Carolina * Effective this Saturday afternoon and evening from 445 PM until 1000 PM EDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Isolated large hail events to 1.5 inches in diameter possible SUMMARY...A cluster of thunderstorms will spread eastward across the watch area through the afternoon, posing a risk of locally damaging wind gusts and hail. The severe thunderstorm watch area is approximately along and 40 statute miles north and south of a line from 30 miles north northwest of Anniston AL to 10 miles east northeast of Anderson SC. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU2). 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 630...WW 631... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 29025. ...Hart Read more

MD 1932 CONCERNING SEVERE POTENTIAL...WATCH POSSIBLE FOR FAR NORTHERN CALIFORNIA...ALONG THE OREGON CASCADES AND INTO THE FAR SOUTHERN WASHINGTON CASCADES.
Mesoscale Discussion 1932 NWS Storm Prediction Center Norman OK 0236 PM CDT Sat Aug 17 2024 Areas affected...far northern California...along the Oregon Cascades and into the far southern Washington Cascades. Concerning...Severe potential...Watch possible Valid 171936Z - 172130Z Probability of Watch Issuance...60 percent SUMMARY...A few supercells capable of large hail and severe wind gusts are possible this afternoon and evening from northern California to the south Washington Cascades. DISCUSSION...Weak instability has started to develop across northern California and into southern Washington ahead of a strong mid-level trough. Expect instability to increase through the afternoon as surface heating continues, low-level moisture advects northward, and temperatures cool aloft. Ascent associated with the strong negatively tilted shortwave trough currently approaching the northern California coast has started to overspread northern California and southern Oregon where an increase in lightning activity is evident. In addition, some mini supercell structures are evident which is not surprising given the strong flow aloft (45 knots at 500mb and nearly 100 knots above 300mb per MFR and SLE 18Z RAOBs). Continued surface heating and steepening lapse rates/cooling aloft should lead to a thermodynamic profile supporting more robust storm/supercell development and the potential for some large hail. While stronger storms will be favored over the higher terrain of the Cascades, storm motion may bring some of these storms into the foothills or perhaps even the Willamette Valley later this afternoon/evening. A severe thunderstorm watch may be needed to address this threat. ..Bentley/Hart.. 08/17/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...PDT...MFR...SEW...PQR...EKA... LAT...LON 41832336 43132329 44532313 45362292 45792268 46232233 46492171 45992130 44562136 43432145 42372151 41862164 41342198 41222231 41192287 41832336 Read more

MD 1933 CONCERNING SEVERE POTENTIAL...WATCH POSSIBLE FOR SOUTHERN MIDDLE TENNESSEE...NORTHERN ALABAMA...NORTHERN GEORGIA
Mesoscale Discussion 1933 NWS Storm Prediction Center Norman OK 0257 PM CDT Sat Aug 17 2024 Areas affected...Southern Middle Tennessee...northern Alabama...northern Georgia Concerning...Severe potential...Watch possible Valid 171957Z - 172130Z Probability of Watch Issuance...40 percent SUMMARY...Damaging wind and hail threat to persist through the afternoon. DISCUSSION...Recent thunderstorm activity across northern Alabama/southern Tennessee into northern Georgia has shown increase in intensity, with transient supercell characteristics. These are occurring in the vicinity of a remnant MCV, which has led to a narrow corridor of 30-40 kts of deep layer shear likely contributing to a more organized storm mode. Temperatures in this region have warmed into the low to mid 90s with dew points in the mid to upper 70s, with MLCAPE analyzed around 2000-2500 J/kg. This moist and unstable air mass will support potential for wet downbursts and perhaps a risk of large hail and damaging wind from stronger more organized storms. This activity will likely continue to increase in coverage, potentially clustering along outflow, into northern Georgia and South Carolina through the afternoon/evening. Should this occur, the risk of damaging wind may increase. The Slight Risk has been expanded southward at 20z, and a watch may be needed to cover this threat. ..Thornton/Hart.. 08/17/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...CAE...GSP...MRX...FFC...OHX...BMX...HUN... LAT...LON 35138672 35488543 35308414 35208327 35018254 34648168 34198123 33968168 33868262 33598450 33868664 34298735 35138672 Read more

MD 1934 CONCERNING SEVERE THUNDERSTORM WATCH 630... FOR FAR NORTHERN ARIZONA INTO NORTH-CENTRAL UTAH
Mesoscale Discussion 1934 NWS Storm Prediction Center Norman OK 0401 PM CDT Sat Aug 17 2024 Areas affected...far northern Arizona into north-central Utah Concerning...Severe Thunderstorm Watch 630... Valid 172101Z - 172230Z The severe weather threat for Severe Thunderstorm Watch 630 continues. SUMMARY...Strong to severe storms with primarily a severe wind threat will persist this afternoon and evening across northern Arizona and much of Utah. DISCUSSION...Widespread convective activity with occasional severe wind gusts has occurred across Utah thus far this afternoon. This widespread coverage has limited destabilization and thus a greater/more focused severe weather threat. However, destabilization continues on the southwestern periphery and continued height falls ahead of the approaching western CONUS trough should lead to additional development through the afternoon/evening. Expect this isolated to scattered severe weather threat to persist through sunset before weakening with diurnal stabilization. ..Bentley/Hart.. 08/17/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...FGZ...SLC...VEF... LAT...LON 37121418 39921318 41131196 41201083 40601045 39621044 37611107 36841145 36541231 36521333 37121418 Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0403 PM CDT Sat Aug 17 2024 Valid 191200Z - 251200Z Elevated fire weather conditions are likely across the Great Basin through the extended, with critical fire weather conditions possible. The driving factors for this regime will be a blocking pattern, where an upper-level ridge over the central US will support persistent hot/dry conditions across the Great Basin across the southern Rockies, into the Southern Plains. Given poor fuel moisture recovery beneath this ridge, especially across the Great Basin, any increase in wind speed (including terrain driven circulations) will result in at least elevated fire weather conditions. Late in the forecast period (Day 7/8), large-scale guidance suggests an increase in mid-level flow may result in surface wind speeds sufficient for critical fire weather conditions. However, uncertainty in the timing/magnitude of the large-scale pattern evolution precludes the ability to denote areas of concerns late next week. ..Marsh.. 08/17/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0403 PM CDT Sat Aug 17 2024 Valid 191200Z - 251200Z Elevated fire weather conditions are likely across the Great Basin through the extended, with critical fire weather conditions possible. The driving factors for this regime will be a blocking pattern, where an upper-level ridge over the central US will support persistent hot/dry conditions across the Great Basin across the southern Rockies, into the Southern Plains. Given poor fuel moisture recovery beneath this ridge, especially across the Great Basin, any increase in wind speed (including terrain driven circulations) will result in at least elevated fire weather conditions. Late in the forecast period (Day 7/8), large-scale guidance suggests an increase in mid-level flow may result in surface wind speeds sufficient for critical fire weather conditions. However, uncertainty in the timing/magnitude of the large-scale pattern evolution precludes the ability to denote areas of concerns late next week. ..Marsh.. 08/17/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

WW 0632 Status Updates
STATUS FOR WATCH 0632 HAS NOT BEEN ISSUED YET Read more

WW 632 SEVERE TSTM AL GA NC SC 172045Z - 180200Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 632 NWS Storm Prediction Center Norman OK 445 PM EDT Sat Aug 17 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northeast Alabama Northern Georgia Western North Carolina Western South Carolina * Effective this Saturday afternoon and evening from 445 PM until 1000 PM EDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Isolated large hail events to 1.5 inches in diameter possible SUMMARY...A cluster of thunderstorms will spread eastward across the watch area through the afternoon, posing a risk of locally damaging wind gusts and hail. The severe thunderstorm watch area is approximately along and 40 statute miles north and south of a line from 30 miles north northwest of Anniston AL to 10 miles east northeast of Anderson SC. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU2). 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 630...WW 631... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 29025. ...Hart Read more

WW 0630 Status Updates
STATUS REPORT ON WW 630 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..BENTLEY..08/17/24 ATTN...WFO...SLC... STATUS REPORT FOR WS 630 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS UTC001-007-013-015-017-021-023-025-027-031-035-039-041-043-045- 049-051-053-055-172140- UT . UTAH COUNTIES INCLUDED ARE BEAVER CARBON DUCHESNE EMERY GARFIELD IRON JUAB KANE MILLARD PIUTE SALT LAKE SANPETE SEVIER SUMMIT TOOELE UTAH WASATCH WASHINGTON WAYNE WYC041-172140- WY . WYOMING COUNTIES INCLUDED ARE UINTA 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 Read more

WW 630 SEVERE TSTM UT WY 171850Z - 180100Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 630 NWS Storm Prediction Center Norman OK 1250 PM MDT Sat Aug 17 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Western and Central Utah Southwest Wyoming * Effective this Saturday afternoon and evening from 1250 PM until 700 PM MDT. * Primary threats include... Scattered damaging wind gusts to 70 mph likely Isolated large hail events to 1.5 inches in diameter possible SUMMARY...Clusters of thunderstorms will spread across much of Utah this afternoon and early evening, posing a risk of locally damaging wind gusts and hail. The severe thunderstorm watch area is approximately along and 70 statute miles east and west of a line from 40 miles east of Saint George UT to 25 miles northeast of Salt Lake City UT. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU0). 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. && AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 23030. ...Hart Read more