Severe Storms

WW 0671 Status Updates
STATUS FOR WATCH 0671 HAS NOT BEEN ISSUED YET Read more

WW 671 SEVERE TSTM KS MO 052230Z - 060500Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 671 NWS Storm Prediction Center Norman OK 530 PM CDT Tue Sep 5 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Far southeast Kansas Southwest to central Missouri * Effective this Tuesday afternoon from 530 PM until Midnight CDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 75 mph possible Isolated large hail events to 1.5 inches in diameter possible SUMMARY...Multicell clusters should develop along a cold front and spread east-southeast this evening with a primary threat of damaging winds. The severe thunderstorm watch area is approximately along and 65 statute miles east and west of a line from 65 miles north northwest of Columbia MO to 15 miles south southwest of Monett MO. 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 669...WW 670... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 550. Mean storm motion vector 29030. ...Grams Read more

WW 0669 Status Updates
STATUS REPORT ON WW 669 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..LYONS..09/05/23 ATTN...WFO...DLH...MPX...ARX... STATUS REPORT FOR WS 669 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MNC001-003-009-013-017-019-021-025-031-035-037-039-043-045-047- 049-053-055-059-061-065-075-079-085-093-095-097-099-103-109-115- 123-131-137-139-141-143-145-147-157-161-163-169-171-052340- MN . MINNESOTA COUNTIES INCLUDED ARE AITKIN ANOKA BENTON BLUE EARTH CARLTON CARVER CASS CHISAGO COOK CROW WING DAKOTA DODGE FARIBAULT FILLMORE FREEBORN GOODHUE HENNEPIN HOUSTON ISANTI ITASCA KANABEC LAKE LE SUEUR MCLEOD MEEKER MILLE LACS MORRISON MOWER NICOLLET OLMSTED PINE RAMSEY RICE ST. LOUIS SCOTT SHERBURNE SIBLEY STEARNS STEELE WABASHA WASECA WASHINGTON WINONA WRIGHT WIC003-005-007-011-013-031-033-051-091-093-095-107-109-113-129- 052340- Read more

WW 669 SEVERE TSTM MN WI LS 052055Z - 060400Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 669 NWS Storm Prediction Center Norman OK 355 PM CDT Tue Sep 5 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Central and Eastern Minnesota Western Wisconsin Lake Superior * Effective this Tuesday afternoon and evening from 355 PM until 1100 PM CDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Scattered large hail events to 1.5 inches in diameter possible A tornado or two possible SUMMARY...Strong to severe thunderstorms are expected to develop through late afternoon and early evening, initially across the eastern half of Minnesota, with large hail and damaging winds as the primary hazards. Storms are expected to develop into western Wisconsin by early/mid-evening. The severe thunderstorm watch area is approximately along and 75 statute miles east and west of a line from 10 miles north of Ely MN to 40 miles southwest of Rochester MN. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU9). 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 550. Mean storm motion vector 23025. ...Guyer Read more

WW 0670 Status Updates
STATUS FOR WATCH 0670 HAS NOT BEEN ISSUED YET Read more

WW 670 SEVERE TSTM AR OK 052200Z - 060500Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 670 NWS Storm Prediction Center Norman OK 500 PM CDT Tue Sep 5 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northwest Arkansas Southwest to northeast Oklahoma * Effective this Tuesday afternoon from 500 PM until Midnight CDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 80 mph possible Isolated large hail events to 1 inch in diameter possible SUMMARY...Isolated to scattered thunderstorms will develop along a northeast to southwest-oriented front in Oklahoma and should grow upscale into multicell clusters, especially over eastern Oklahoma into northwest Arkansas. Damaging winds will be the main threat. The severe thunderstorm watch area is approximately along and 70 statute miles east and west of a line from 30 miles northeast of Grove OK to 40 miles southeast of Chickasha OK. 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. && OTHER WATCH INFORMATION...CONTINUE...WW 669... AVIATION...A few severe thunderstorms with hail surface and aloft to 1 inch. Extreme turbulence and surface wind gusts to 70 knots. A few cumulonimbi with maximum tops to 550. Mean storm motion vector 32025. ...Grams Read more

MD 2085 CONCERNING SEVERE POTENTIAL...WATCH POSSIBLE FOR PORTIONS OF MO...SOUTHEAST KS...NORTHEAST/CENTRAL OK...AND FAR NORTHWEST AR
Mesoscale Discussion 2085 NWS Storm Prediction Center Norman OK 0404 PM CDT Tue Sep 05 2023 Areas affected...Portions of MO...southeast KS...northeast/central OK...and far northwest AR Concerning...Severe potential...Watch possible Valid 052104Z - 052330Z Probability of Watch Issuance...60 percent SUMMARY...The severe-storm risk should increase during the next few hours. Severe gusts and isolated hail are both possible. A watch issuance is possible this afternoon. DISCUSSION...Latest surface analysis shows a northeast/southwest- oriented cold front extending from northwest MO into parts of central OK this afternoon -- where shallow boundary-layer cumulus is beginning to develop. Continued diurnal heating amid rich boundary-layer moisture (lower 70s surface dewpoints) along/immediately ahead of the east-southeastward-moving front should support convective initiation in the next few hours. Steep low/mid-level lapse rates and 20-30-kt midlevel west-southwesterly flow oriented oblique to the surface front (strongest across MO) will initially support semi-discrete storms capable of marginally severe hail and locally severe gusts. However, a fairly quick transition from cells to an organized line of storms is expected as storms maintain residence time in the frontal circulation amid increasing outflow generation. This mode transition will favor an increasing severe-wind threat as the front continues slowly east-southeastward into the evening hours. Currently, the potential for an organized QLCS appears greatest over parts of MO -- where deep-layer shear and large-scale ascent will be stronger compared to areas farther southwest. However, 100 deg surface temperatures and related steep low-level lapse rates will still support severe-thunderstorm gusts into central OK. A watch issuance is possible this afternoon for parts of the area. ..Weinman/Guyer.. 09/05/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LSX...SGF...EAX...TSA...ICT...OUN... LAT...LON 36569631 37239540 38389426 39019377 39809340 40159304 40189255 39939190 39489136 38849125 37679171 36929252 36239377 35159582 35069665 35229703 35569727 35839723 36569631 Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0253 PM CDT Tue Sep 05 2023 Valid 052000Z - 061200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE UPPER MISSISSIPPI VALLEY/WESTERN UPPER GREAT LAKES REGION...AND FROM MISSOURI AND VICINITY SOUTHWESTWARD INTO NORTHEASTERN OKLAHOMA... ...SUMMARY... Severe thunderstorms are expected this afternoon and evening over parts of the upper Mississippi Valley/Lake Superior region, and across the Ozarks and parts of Oklahoma. Severe wind gusts and isolated large hail are possible. ...Discussion... Along with minor line tweaks in a few areas, including some eastward expansion of thunder into parts of Wyoming for the overnight period, the only other substantive change at this time is the northward expansion of SLGT risk/15% wind into parts of northern Missouri. Here, a similar thermodynamic pre-frontal environment is indicated as compared to areas a bit farther south, and several CAM runs are indicating development along the front may extend a bit farther north than previously hinted at in the outlook. Otherwise, expectations remain similar to those in prior outlooks. ..Goss.. 09/05/2023 .PREV DISCUSSION... /ISSUED 1131 AM CDT Tue Sep 05 2023/ ...Upper Mississippi Valley... A shortwave trough over the Dakotas this morning will continue eastward toward the upper Mississippi Valley through tonight. A slight cooling of mid-level temperatures (-10C at 500 mb) will accompany this trough, while only a modest strengthening of trough-preceding winds aloft is expected, given that the trough is somewhat removed from the stronger westerlies over the Canadian prairies. While some warm-sector cloud cover persists early today regionally, the boundary layer ahead of an eastward-moving cold front should become minimally inhibited by early into mid-afternoon, with MLCAPE reaching 2500+ J/kg especially across the eastern halves of Minnesota and Iowa, as well as much of western Wisconsin and far northwest Illinois. Initial thunderstorm intensification is expected this afternoon across northern/central Minnesota, potentially with an ongoing band of storms across northern Minnesota, and more so near the aforementioned front and surface wave, with subsequent scattered development southward into southeast Minnesota/eastern Iowa and western Wisconsin through late afternoon and early evening. Severe wind gusts and hail will be possible with a mixed mode of storms including multicells and some transient supercells. Some tornado risk may exist as well, mainly across northeast Minnesota/northwest Wisconsin. ...Middle Mississippi Valley/Ozarks/southern Plains... Widely scattered mid-level convection across the region trails a shortwave trough centered generally near the confluence of the Mississippi/Ohio Rivers. This convection is atop a warm-sector boundary layer that will heat and become strongly unstable by peak heating, particularly across eastern Oklahoma into Missouri western/northern Arkansas ahead of an east/southeastward-moving front. Isolated to widely scattered thunderstorms are expected to develop by mid/late afternoon near the front, and somewhat across the warm sector, potentially influenced by lingering cloud cover/zones of differential heating. While tropospheric winds will only be modest strength (effective shear less than 30 kt), strong heating, steep lapse rates, and ample buoyancy will support the potential for severe-caliber wind gusts, especially with the aforementioned corridor of greatest destabilization. Some severe hail may occur as well. Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0253 PM CDT Tue Sep 05 2023 Valid 052000Z - 061200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE UPPER MISSISSIPPI VALLEY/WESTERN UPPER GREAT LAKES REGION...AND FROM MISSOURI AND VICINITY SOUTHWESTWARD INTO NORTHEASTERN OKLAHOMA... ...SUMMARY... Severe thunderstorms are expected this afternoon and evening over parts of the upper Mississippi Valley/Lake Superior region, and across the Ozarks and parts of Oklahoma. Severe wind gusts and isolated large hail are possible. ...Discussion... Along with minor line tweaks in a few areas, including some eastward expansion of thunder into parts of Wyoming for the overnight period, the only other substantive change at this time is the northward expansion of SLGT risk/15% wind into parts of northern Missouri. Here, a similar thermodynamic pre-frontal environment is indicated as compared to areas a bit farther south, and several CAM runs are indicating development along the front may extend a bit farther north than previously hinted at in the outlook. Otherwise, expectations remain similar to those in prior outlooks. ..Goss.. 09/05/2023 .PREV DISCUSSION... /ISSUED 1131 AM CDT Tue Sep 05 2023/ ...Upper Mississippi Valley... A shortwave trough over the Dakotas this morning will continue eastward toward the upper Mississippi Valley through tonight. A slight cooling of mid-level temperatures (-10C at 500 mb) will accompany this trough, while only a modest strengthening of trough-preceding winds aloft is expected, given that the trough is somewhat removed from the stronger westerlies over the Canadian prairies. While some warm-sector cloud cover persists early today regionally, the boundary layer ahead of an eastward-moving cold front should become minimally inhibited by early into mid-afternoon, with MLCAPE reaching 2500+ J/kg especially across the eastern halves of Minnesota and Iowa, as well as much of western Wisconsin and far northwest Illinois. Initial thunderstorm intensification is expected this afternoon across northern/central Minnesota, potentially with an ongoing band of storms across northern Minnesota, and more so near the aforementioned front and surface wave, with subsequent scattered development southward into southeast Minnesota/eastern Iowa and western Wisconsin through late afternoon and early evening. Severe wind gusts and hail will be possible with a mixed mode of storms including multicells and some transient supercells. Some tornado risk may exist as well, mainly across northeast Minnesota/northwest Wisconsin. ...Middle Mississippi Valley/Ozarks/southern Plains... Widely scattered mid-level convection across the region trails a shortwave trough centered generally near the confluence of the Mississippi/Ohio Rivers. This convection is atop a warm-sector boundary layer that will heat and become strongly unstable by peak heating, particularly across eastern Oklahoma into Missouri western/northern Arkansas ahead of an east/southeastward-moving front. Isolated to widely scattered thunderstorms are expected to develop by mid/late afternoon near the front, and somewhat across the warm sector, potentially influenced by lingering cloud cover/zones of differential heating. While tropospheric winds will only be modest strength (effective shear less than 30 kt), strong heating, steep lapse rates, and ample buoyancy will support the potential for severe-caliber wind gusts, especially with the aforementioned corridor of greatest destabilization. Some severe hail may occur as well. Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0253 PM CDT Tue Sep 05 2023 Valid 052000Z - 061200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE UPPER MISSISSIPPI VALLEY/WESTERN UPPER GREAT LAKES REGION...AND FROM MISSOURI AND VICINITY SOUTHWESTWARD INTO NORTHEASTERN OKLAHOMA... ...SUMMARY... Severe thunderstorms are expected this afternoon and evening over parts of the upper Mississippi Valley/Lake Superior region, and across the Ozarks and parts of Oklahoma. Severe wind gusts and isolated large hail are possible. ...Discussion... Along with minor line tweaks in a few areas, including some eastward expansion of thunder into parts of Wyoming for the overnight period, the only other substantive change at this time is the northward expansion of SLGT risk/15% wind into parts of northern Missouri. Here, a similar thermodynamic pre-frontal environment is indicated as compared to areas a bit farther south, and several CAM runs are indicating development along the front may extend a bit farther north than previously hinted at in the outlook. Otherwise, expectations remain similar to those in prior outlooks. ..Goss.. 09/05/2023 .PREV DISCUSSION... /ISSUED 1131 AM CDT Tue Sep 05 2023/ ...Upper Mississippi Valley... A shortwave trough over the Dakotas this morning will continue eastward toward the upper Mississippi Valley through tonight. A slight cooling of mid-level temperatures (-10C at 500 mb) will accompany this trough, while only a modest strengthening of trough-preceding winds aloft is expected, given that the trough is somewhat removed from the stronger westerlies over the Canadian prairies. While some warm-sector cloud cover persists early today regionally, the boundary layer ahead of an eastward-moving cold front should become minimally inhibited by early into mid-afternoon, with MLCAPE reaching 2500+ J/kg especially across the eastern halves of Minnesota and Iowa, as well as much of western Wisconsin and far northwest Illinois. Initial thunderstorm intensification is expected this afternoon across northern/central Minnesota, potentially with an ongoing band of storms across northern Minnesota, and more so near the aforementioned front and surface wave, with subsequent scattered development southward into southeast Minnesota/eastern Iowa and western Wisconsin through late afternoon and early evening. Severe wind gusts and hail will be possible with a mixed mode of storms including multicells and some transient supercells. Some tornado risk may exist as well, mainly across northeast Minnesota/northwest Wisconsin. ...Middle Mississippi Valley/Ozarks/southern Plains... Widely scattered mid-level convection across the region trails a shortwave trough centered generally near the confluence of the Mississippi/Ohio Rivers. This convection is atop a warm-sector boundary layer that will heat and become strongly unstable by peak heating, particularly across eastern Oklahoma into Missouri western/northern Arkansas ahead of an east/southeastward-moving front. Isolated to widely scattered thunderstorms are expected to develop by mid/late afternoon near the front, and somewhat across the warm sector, potentially influenced by lingering cloud cover/zones of differential heating. While tropospheric winds will only be modest strength (effective shear less than 30 kt), strong heating, steep lapse rates, and ample buoyancy will support the potential for severe-caliber wind gusts, especially with the aforementioned corridor of greatest destabilization. Some severe hail may occur as well. Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0245 PM CDT Tue Sep 05 2023 Valid 071200Z - 131200Z Fire weather potential remains limited across the country for the extended period. Upper-level ridging is forecast to re-establish over northern Mexico into the Southwest/Four Corners region through the end of the work week and into the weekend. Heading into next week, ensemble means and cluster analyses depict a de-amplification of this ridge as longwave troughing becomes established over the eastern third of the CONUS. While the resulting amplitudes of the ridge/trough are uncertain, this synoptic pattern typically favors warming/drying conditions across the Southwest, Great Basin, and West Coast with cooler temperatures and rain chances east of the Rockies. Fuels are currently unreceptive across much of the West, but may see some curing during this period. Across the Plains where fuels are dry, fire weather concerns will likely remain localized through the extended period with limited predictability at this range. ...D3/Thursday to D4/Friday - Southern High Plains... One such area of localized fire weather concern may emerge across the TX/OK Panhandles into western OK D3/Thursday and D4/Friday. A zonal to northwest flow regime over the central Rockies should foster a deepening lee trough from northeast NM into CO during this period. Increasing south/southwesterly winds with trajectories emanating from the southern Rockies may experience sufficient drying to support areas of 20-25% RH and winds near 15 mph. While deterministic solutions suggest elevated conditions will occur, considerable spread is noted in ensemble guidance, which limits confidence in the threat at this point. However, this region has maintained dry fuels with several fires noted in recent days, so trends will be monitored in subsequent outlooks for the need for highlights. ..Moore.. 09/05/2023 ...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 0245 PM CDT Tue Sep 05 2023 Valid 071200Z - 131200Z Fire weather potential remains limited across the country for the extended period. Upper-level ridging is forecast to re-establish over northern Mexico into the Southwest/Four Corners region through the end of the work week and into the weekend. Heading into next week, ensemble means and cluster analyses depict a de-amplification of this ridge as longwave troughing becomes established over the eastern third of the CONUS. While the resulting amplitudes of the ridge/trough are uncertain, this synoptic pattern typically favors warming/drying conditions across the Southwest, Great Basin, and West Coast with cooler temperatures and rain chances east of the Rockies. Fuels are currently unreceptive across much of the West, but may see some curing during this period. Across the Plains where fuels are dry, fire weather concerns will likely remain localized through the extended period with limited predictability at this range. ...D3/Thursday to D4/Friday - Southern High Plains... One such area of localized fire weather concern may emerge across the TX/OK Panhandles into western OK D3/Thursday and D4/Friday. A zonal to northwest flow regime over the central Rockies should foster a deepening lee trough from northeast NM into CO during this period. Increasing south/southwesterly winds with trajectories emanating from the southern Rockies may experience sufficient drying to support areas of 20-25% RH and winds near 15 mph. While deterministic solutions suggest elevated conditions will occur, considerable spread is noted in ensemble guidance, which limits confidence in the threat at this point. However, this region has maintained dry fuels with several fires noted in recent days, so trends will be monitored in subsequent outlooks for the need for highlights. ..Moore.. 09/05/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0117 PM CDT Tue Sep 05 2023 Valid 061200Z - 071200Z ...NO CRITICAL AREAS... Fire weather concerns remain low for Wednesday across the country. Latest guidance continues to show a weak signal for localized elevated fire weather conditions across the greater Four Corners region, but the patchy nature of the threat, combined with poor fuel status, precludes any highlights. ..Moore.. 09/05/2023 .PREV DISCUSSION... /ISSUED 0102 AM CDT Tue Sep 05 2023/ ...Synopsis... Upper-level ridging will modestly intensify in the southern Rockies. A surface front will largely stall near the Red River. With cooler temperatures and lighter winds expected across areas with dry fuels, fire weather concerns will be low on Wednesday. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0117 PM CDT Tue Sep 05 2023 Valid 061200Z - 071200Z ...NO CRITICAL AREAS... Fire weather concerns remain low for Wednesday across the country. Latest guidance continues to show a weak signal for localized elevated fire weather conditions across the greater Four Corners region, but the patchy nature of the threat, combined with poor fuel status, precludes any highlights. ..Moore.. 09/05/2023 .PREV DISCUSSION... /ISSUED 0102 AM CDT Tue Sep 05 2023/ ...Synopsis... Upper-level ridging will modestly intensify in the southern Rockies. A surface front will largely stall near the Red River. With cooler temperatures and lighter winds expected across areas with dry fuels, fire weather concerns will be low on Wednesday. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0117 PM CDT Tue Sep 05 2023 Valid 061200Z - 071200Z ...NO CRITICAL AREAS... Fire weather concerns remain low for Wednesday across the country. Latest guidance continues to show a weak signal for localized elevated fire weather conditions across the greater Four Corners region, but the patchy nature of the threat, combined with poor fuel status, precludes any highlights. ..Moore.. 09/05/2023 .PREV DISCUSSION... /ISSUED 0102 AM CDT Tue Sep 05 2023/ ...Synopsis... Upper-level ridging will modestly intensify in the southern Rockies. A surface front will largely stall near the Red River. With cooler temperatures and lighter winds expected across areas with dry fuels, fire weather concerns will be low on Wednesday. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

WW 0666 Status Updates
STATUS REPORT ON WW 666 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 5 SSE CYS TO 25 WSW TOR TO 55 ENE DGW TO 60 ESE GCC TO 50 ENE GCC TO 35 N GCC TO 45 W GCC TO 40 NNW CPR. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 2080 ..LYONS..09/04/23 ATTN...WFO...BYZ...CYS...UNR...RIW... STATUS REPORT FOR WS 666 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC011-075-042340- MT . MONTANA COUNTIES INCLUDED ARE CARTER POWDER RIVER NEC007-013-045-123-157-165-042340- NE . NEBRASKA COUNTIES INCLUDED ARE BANNER BOX BUTTE DAWES MORRILL SCOTTS BLUFF SIOUX SDC019-033-047-055-063-081-093-102-103-105-137-042340- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE Read more

WW 666 SEVERE TSTM MT NE SD WY 042005Z - 050200Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 666 NWS Storm Prediction Center Norman OK 205 PM MDT Mon Sep 4 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southeast Montana Nebraska Panhandle Western South Dakota Eastern Wyoming * Effective this Monday afternoon and evening from 205 PM until 800 PM MDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 75 mph possible Isolated large hail events to 1.5 inches in diameter possible SUMMARY...Strong to severe thunderstorms are expected to develop through mid/late afternoon across the region. Storms will initially be capable of large hail and damaging winds, with severe wind potential likely to increase by evening into and across western South Dakota. The severe thunderstorm watch area is approximately along and 80 statute miles east and west of a line from 35 miles northwest of Buffalo SD to 40 miles southwest of Scottsbluff NE. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU6). 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 65 knots. A few cumulonimbi with maximum tops to 550. Mean storm motion vector 23035. ...Guyer Read more

WW 666 SEVERE TSTM MT NE SD WY 042005Z - 050200Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 666 NWS Storm Prediction Center Norman OK 205 PM MDT Mon Sep 4 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southeast Montana Nebraska Panhandle Western South Dakota Eastern Wyoming * Effective this Monday afternoon and evening from 205 PM until 800 PM MDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 75 mph possible Isolated large hail events to 1.5 inches in diameter possible SUMMARY...Strong to severe thunderstorms are expected to develop through mid/late afternoon across the region. Storms will initially be capable of large hail and damaging winds, with severe wind potential likely to increase by evening into and across western South Dakota. The severe thunderstorm watch area is approximately along and 80 statute miles east and west of a line from 35 miles northwest of Buffalo SD to 40 miles southwest of Scottsbluff NE. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU6). 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 65 knots. A few cumulonimbi with maximum tops to 550. Mean storm motion vector 23035. ...Guyer Read more

WW 0667 Status Updates
STATUS FOR WATCH 0667 HAS NOT BEEN ISSUED YET Read more

WW 0667 Status Updates
STATUS FOR WATCH 0667 HAS NOT BEEN ISSUED YET Read more