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Tag: day

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SPC Apr 15, 2025 Day 4-8 Severe Weather Outlook

Day 4-8 Outlook Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0358 AM CDT Tue Apr 15 2025 Valid 181200Z - 231200Z ...DISCUSSION... An active severe weather pattern expected through at least this weekend, before predictability diminishes early next week. ...D4/Friday... Guidance remains consistent with a broad swath of strong mid-level southwesterlies from the southern High Plains to the Great Lakes, downstream of a longwave trough from northern ON to the Lower CO Valley. This will overlap a similarly oriented surface front. In response to increasing mid-level height falls, a surface cyclone should track across the central Great
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SPC Apr 15, 2025 0730 UTC Day 3 Severe Thunderstorm Outlook

SPC 0730Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0221 AM CDT Tue Apr 15 2025 Valid 171200Z - 181200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN IA/NORTHERN MO/EASTERN NE... ...SUMMARY... Scattered severe thunderstorms, with a primary threat of large hail, are possible on Thursday evening/night, centered on eastern Nebraska, northern Missouri, and Iowa. ...Synopsis... A longwave trough, consisting of multiple embedded shortwave impulses, will become established from the southern Prairie Provinces across the West to off the Baja CA coast. Peak surface cyclone amplitude is expected over western KS on Thursday
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SPC Apr 14, 2025 2000 UTC Day 1 Convective Outlook

SPC 2000Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0249 PM CDT Mon Apr 14 2025 Valid 142000Z - 151200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS WEST VIRGINIA AND VIRGINIA... ...SUMMARY... Scattered strong to severe storms ongoing this afternoon will continue through early tonight from the Upper Ohio Valley eastward to the Mid-Atlantic. Large hail, severe wind gusts, and a couple of tornadoes are likely. ...20z Update OH Valley and Appalachians... Afternoon satellite imagery shows several areas of convection developing beneath a broad upper low over parts of the Midwest, Great
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SPC Apr 14, 2025 1930 UTC Day 3 Severe Thunderstorm Outlook

SPC 1930Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0220 PM CDT Mon Apr 14 2025 Valid 161200Z - 171200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast through Wednesday night. ...Synopsis... A broad area of isolated to scattered thunderstorms are expected across portions of the West into the northern Rockies and central Plains. This is in response to forcing for ascent increasing with a broad area of enhanced mid-level flow rounding the western US trough. Largely, thunderstorms will be disorganized and sub-severe, owing to poor moisture and weak shear profiles.
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SPC Apr 14, 2025 Day 4-8 Severe Weather Outlook

Day 4-8 Outlook Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0350 AM CDT Mon Apr 14 2025 Valid 171200Z - 221200Z ...DISCUSSION... Active severe weather pattern expected late week into the weekend. ...D4/Thursday... A longwave trough should become clearly anchored over the West and consist of multiple embedded shortwave impulses. Peak surface cyclone amplitude is largely progged over western KS on Thursday afternoon, with a dryline arcing across eastern KS into the southern Great Plains. Another day of modifying moisture return northward from the western Gulf should yield at least moderate buoyancy ahead of the dryline. A
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SPC Apr 14, 2025 0730 UTC Day 3 Severe Thunderstorm Outlook

SPC 0730Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0218 AM CDT Mon Apr 14 2025 Valid 161200Z - 171200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast through Wednesday night. ...West to Central States... A broad swath of predominately isolated thunder is anticipated starting Wednesday afternoon and persisting into early morning Thursday. A northern-stream shortwave trough is expected to dig southward from the Canadian Rockies into the northern Intermountain West. A southern-stream, lower-amplitude shortwave trough should drift towards the southern CA coast. Downstream lee cyclogenesis should occur over the central
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SPC Apr 14, 2025 0600 UTC Day 2 Convective Outlook

SPC 0600Z Day 2 Outlook Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1227 AM CDT Mon Apr 14 2025 Valid 151200Z - 161200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected on Tuesday or Tuesday night. ...Northeast... Sporadic, low-topped thunderstorms may develop towards midday through the afternoon within a post-frontal regime as 500-mb temperatures fall at/below -28 C. This should occur to the west of an intense mid-level jet that will progress quickly across the Mid-Atlantic States and off the coast by evening. While the boundary layer will be drying, scant buoyancy may persist
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SPC Apr 14, 2025 0600 UTC Day 1 Convective Outlook

SPC 1200Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1258 AM CDT Mon Apr 14 2025 Valid 141200Z - 151200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE OHIO VALLEY...CENTRAL APPALACHIANS AND MID-ATLANTIC... ...SUMMARY... Scattered strong to severe storms are expected this afternoon and evening across parts of the Upper Ohio Valley eastward to the Mid-Atlantic. Large hail, severe wind gusts, and a tornado threat will be possible. ...Lower Ohio Valley/Central Appalachians/Mid-Atlantic... At mid-levels, a positively-tilted trough will move through the northern Plains as a low moves northeastward into Ontario.
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SPC Apr 13, 2025 2000 UTC Day 1 Convective Outlook

SPC 2000Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0253 PM CDT Sun Apr 13 2025 Valid 132000Z - 141200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms will be possible from the Upper Mississippi Valley to the Great Lakes, and from the central Rockies to the lower Missouri Valley through tonight. Severe thunderstorms are not expected. ...20z Update... The prior forecast remains valid with only minimal changes to the western edge of the Thunder area. Isolated thunderstorms ongoing over parts of the Upper Midwest/Great Lakes should spread eastward through tonight. Additional elevated thunderstorms will
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SPC Apr 13, 2025 1930 UTC Day 3 Severe Thunderstorm Outlook

SPC 1930Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0207 PM CDT Sun Apr 13 2025 Valid 151200Z - 161200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast on Tuesday. ...Synopsis... A large upper trough will move rapidly eastward from the Great Lakes and OH Valley into the Mid Atlantic and Northeast, with a surface high pushing into the lower MS Valley and Southeast. The drying behind this system will significantly reduce thunderstorm chances over much of the CONUS on Tuesday. A very low chance of early day convection may exist
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