SPC Oct 11, 2024 0730 UTC Day 3 Severe Thunderstorm Outlook
SPC 0730Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0148 AM CDT Fri Oct 11 2024 Valid 131200Z - 141200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS LATE SUNDAY AFTERNOON AND EVENING ACROSS PARTS OF EASTERN KENTUCKY...MUCH OF WEST VIRGINIA...AND ADJACENT PORTIONS OF OHIO AND VIRGINIA... ...SUMMARY... Strong thunderstorms may impact a corridor from eastern Kentucky through West Virginia by early Sunday evening, with some posing a risk for small hail and potentially damaging wind gusts. ...Synopsis... Mid/upper flow across the northern mid-latitudes will remain amplified, with at least some further amplification of large-scale troughing across the Upper Midwest/Great Lakes region into the Ohio Valley through this period. Models indicate at least a couple of vigorous short wave perturbations digging through this regime, one of which may contribute to modest surface cyclogenesis along a frontal zone across the Ohio Valley into the Northeast. Seasonably high moisture content will generally remain confined to a plume along and southeast of a remnant mid-level shear axis across the central Gulf of Mexico and Florida Peninsula. However, models indicate that a continued gradual moistening of the boundary layer ahead of the interior U.S. front may contribute to a corridor of modest destabilization across parts of the Ohio/Tennessee Valley into the western slopes of the Appalachians by late Sunday afternoon. ...Eastern Kentucky into West Virginia... Models vary considerably concerning the evolution of the surface cyclogenesis across the Ohio Valley into Northeast. However, there appears a general consensus that a moistening but well mixed pre-frontal boundary layer will become characterized by modest CAPE on the order of 500-1000 J/kg by late Sunday afternoon, within at least a narrow corridor. It appears that this will occur in the presence of strengthening deep-layer westerly mean wind fields, including 30-50 kt in the 850-500 mb layer. Stronger mid-level height falls may not begin overspreading this corridor until late Sunday afternoon or later, but the environment may remain conducive to strong thunderstorms posing a risk for small hail and potentially damaging wind gusts well into Sunday evening. ..Kerr.. 10/11/2024 Read more
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0148 AM CDT Fri Oct 11 2024 Valid 131200Z - 141200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS LATE SUNDAY AFTERNOON AND EVENING ACROSS PARTS OF EASTERN KENTUCKY...MUCH OF WEST VIRGINIA...AND ADJACENT PORTIONS OF OHIO AND VIRGINIA... ...SUMMARY... Strong thunderstorms may impact a corridor from eastern Kentucky through West Virginia by early Sunday evening, with some posing a risk for small hail and potentially damaging wind gusts. ...Synopsis... Mid/upper flow across the northern mid-latitudes will remain amplified, with at least some further amplification of large-scale troughing across the Upper Midwest/Great Lakes region into the Ohio Valley through this period. Models indicate at least a couple of vigorous short wave perturbations digging through this regime, one of which may contribute to modest surface cyclogenesis along a frontal zone across the Ohio Valley into the Northeast. Seasonably high moisture content will generally remain confined to a plume along and southeast of a remnant mid-level shear axis across the central Gulf of Mexico and Florida Peninsula. However, models indicate that a continued gradual moistening of the boundary layer ahead of the interior U.S. front may contribute to a corridor of modest destabilization across parts of the Ohio/Tennessee Valley into the western slopes of the Appalachians by late Sunday afternoon. ...Eastern Kentucky into West Virginia... Models vary considerably concerning the evolution of the surface cyclogenesis across the Ohio Valley into Northeast. However, there appears a general consensus that a moistening but well mixed pre-frontal boundary layer will become characterized by modest CAPE on the order of 500-1000 J/kg by late Sunday afternoon, within at least a narrow corridor. It appears that this will occur in the presence of strengthening deep-layer westerly mean wind fields, including 30-50 kt in the 850-500 mb layer. Stronger mid-level height falls may not begin overspreading this corridor until late Sunday afternoon or later, but the environment may remain conducive to strong thunderstorms posing a risk for small hail and potentially damaging wind gusts well into Sunday evening. ..Kerr.. 10/11/2024 Read more