Severe Storms

SPC 0600Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1200 AM CDT Sun Aug 18 2019 Valid 191200Z - 201200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE NORTHERN PLAINS... ...SUMMARY... Isolated severe storms are possible over parts of the northern Plains Monday evening and overnight. ...Synopsis... A negative-tilt shortwave trough will quickly eject northeast across Quebec, resulting in rising heights over the Great Lakes during the day. A brief period of lift will occur over northern parts of the northeastern states, where weak instability will develop. Overnight and to the west, subtle height falls will occur over the northern Plains and Upper MS Valley, on the southern fringe of a shortwave trough over MB. Here, a cold front will move into the central Dakotas by 00Z, with mid 60s F dewpoints spreading northward ahead of it aiding destabilization and supporting at least isolated storms. To the south, strong instability will once again develop over the central Plains, but will be capped for most of the period. ...Northern Plains... Strong heating will occur over ND, northern MN, and western SD along and west of the wind shift. The air mass over the moist sector will be capped for much of the day, but a narrow zone of uncapped air should develop along the front. Isolated late afternoon and evening storms are possible with marginal wind or hail. Overnight, elevated instability will develop from NE/IA into MN, and sporadic storms cannot be ruled out from northeast KS into IA. However, the probability of severe in those areas appears low prior to 12Z Tuesday. ...Northern NY into ME... Low-level winds will continue to veer during the day as the shortwave trough ejects east/northeast over the region. Forecast soundings show sufficient instability for thunderstorms during the day, and modest deep shear, but midlevel subsidence will likely mitigate overall storm coverage and intensity. As such, severe weather is not currently forecast, but a few strong storms cannot be ruled out with gusty winds and small hail. ...MAXIMUM RISK BY HAZARD... Tornado: 2% - Marginal Wind: 5% - Marginal Hail: 5% - Marginal ..Jewell.. 08/18/2019 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0100 AM CDT Sun Aug 18 2019 Valid 181200Z - 191200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER LOWER MI...NORTHEAST IN...AND FAR NORTHWEST OH... ...SUMMARY... Scattered thunderstorms capable of severe gusts and large hail are possible over Lower Michigan, northeast Indiana, and far northwest Ohio this afternoon into the early evening. ...Middle MS Valley through OH Valley and Upper Great Lakes... Well-organized MCS currently moving through southern MN and northern IA will likely be in the vicinity of the IA/IL border at the beginning of the period. The resulting convectively induced vorticity maximum and attendant isolated showers and thunderstorms are expected to gradually move eastward this morning. A very moist and diurnally destabilized air mass is expected downstream across Lower MI and the OH Valley. As a result, thunderstorms associated with this vorticity maximum are expected to reintensify as they move into Lower MI and the middle OH Valley this afternoon. The anticipated trajectory of vorticity maximum currently takes it over Lower MI during the afternoon. Enhanced mid-level flow will accompany this vorticity maximum, resulting in strong enough vertical shear to support more organized storm structures capable of damaging wind gusts and isolated hail. Highest concentration of severe storms is currently expected to be across southern portions of Lower MI and adjacent northeast IN and northwest OH. Another round of thunderstorms is possible over the region as the cold front moves through this evening, but development of these storms is largely dependent on the strength of the antecedent storms and air mass recovery in their wake. ...Lower Great Lakes into the Northeast... Low-amplitude shortwave trough currently moving through the middle OH Valley will continue eastward/northeastward, reaching the Lower Great Lakes/Northeast region by the early afternoon. Despite relatively modest lapse rates, surface dewpoints in the upper 60s (isolated low 70s possible) and surface temperatures in the mid 80s will still support moderate buoyancy capable of occasionally strong updrafts. Vertical shear will be modest and a predominantly linear multicell mode is anticipated. Water-loaded downbursts are possible with strongest storms. ...Ozark Plateau into OK... A very warm and moist low-level air mass will remain in place across the region with afternoon dewpoints in the 70s and temperatures in the upper 90s/low 100s. Steep mid-level lapse rates atop this warm and moist air mass will result in very strong buoyancy (i.e. MLCAPE greater than 3000 J/kg) but also modest convective inhibition. Impetus for overcoming this convective inhibition and initiating deep updrafts is expected to be the cold front moving south through the region. However, location of the cold front this afternoon is uncertain, primarily because of potential modification of its position as a result of outflow from the ongoing MCS across KS. There is also some chance for the MCS to remain over northeast OK and the Ozark Plateau long enough to prevent air mass recovery. These uncertainties merit keeping Marginal severe probabilities for this forecast, but an upgrade may be needed in a subsequent outlook as these mesoscale details become more certain. ..Mosier/Nauslar.. 08/18/2019 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0100 AM CDT Sun Aug 18 2019 Valid 181200Z - 191200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER LOWER MI...NORTHEAST IN...AND FAR NORTHWEST OH... ...SUMMARY... Scattered thunderstorms capable of severe gusts and large hail are possible over Lower Michigan, northeast Indiana, and far northwest Ohio this afternoon into the early evening. ...Middle MS Valley through OH Valley and Upper Great Lakes... Well-organized MCS currently moving through southern MN and northern IA will likely be in the vicinity of the IA/IL border at the beginning of the period. The resulting convectively induced vorticity maximum and attendant isolated showers and thunderstorms are expected to gradually move eastward this morning. A very moist and diurnally destabilized air mass is expected downstream across Lower MI and the OH Valley. As a result, thunderstorms associated with this vorticity maximum are expected to reintensify as they move into Lower MI and the middle OH Valley this afternoon. The anticipated trajectory of vorticity maximum currently takes it over Lower MI during the afternoon. Enhanced mid-level flow will accompany this vorticity maximum, resulting in strong enough vertical shear to support more organized storm structures capable of damaging wind gusts and isolated hail. Highest concentration of severe storms is currently expected to be across southern portions of Lower MI and adjacent northeast IN and northwest OH. Another round of thunderstorms is possible over the region as the cold front moves through this evening, but development of these storms is largely dependent on the strength of the antecedent storms and air mass recovery in their wake. ...Lower Great Lakes into the Northeast... Low-amplitude shortwave trough currently moving through the middle OH Valley will continue eastward/northeastward, reaching the Lower Great Lakes/Northeast region by the early afternoon. Despite relatively modest lapse rates, surface dewpoints in the upper 60s (isolated low 70s possible) and surface temperatures in the mid 80s will still support moderate buoyancy capable of occasionally strong updrafts. Vertical shear will be modest and a predominantly linear multicell mode is anticipated. Water-loaded downbursts are possible with strongest storms. ...Ozark Plateau into OK... A very warm and moist low-level air mass will remain in place across the region with afternoon dewpoints in the 70s and temperatures in the upper 90s/low 100s. Steep mid-level lapse rates atop this warm and moist air mass will result in very strong buoyancy (i.e. MLCAPE greater than 3000 J/kg) but also modest convective inhibition. Impetus for overcoming this convective inhibition and initiating deep updrafts is expected to be the cold front moving south through the region. However, location of the cold front this afternoon is uncertain, primarily because of potential modification of its position as a result of outflow from the ongoing MCS across KS. There is also some chance for the MCS to remain over northeast OK and the Ozark Plateau long enough to prevent air mass recovery. These uncertainties merit keeping Marginal severe probabilities for this forecast, but an upgrade may be needed in a subsequent outlook as these mesoscale details become more certain. ..Mosier/Nauslar.. 08/18/2019 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0100 AM CDT Sun Aug 18 2019 Valid 181200Z - 191200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER LOWER MI...NORTHEAST IN...AND FAR NORTHWEST OH... ...SUMMARY... Scattered thunderstorms capable of severe gusts and large hail are possible over Lower Michigan, northeast Indiana, and far northwest Ohio this afternoon into the early evening. ...Middle MS Valley through OH Valley and Upper Great Lakes... Well-organized MCS currently moving through southern MN and northern IA will likely be in the vicinity of the IA/IL border at the beginning of the period. The resulting convectively induced vorticity maximum and attendant isolated showers and thunderstorms are expected to gradually move eastward this morning. A very moist and diurnally destabilized air mass is expected downstream across Lower MI and the OH Valley. As a result, thunderstorms associated with this vorticity maximum are expected to reintensify as they move into Lower MI and the middle OH Valley this afternoon. The anticipated trajectory of vorticity maximum currently takes it over Lower MI during the afternoon. Enhanced mid-level flow will accompany this vorticity maximum, resulting in strong enough vertical shear to support more organized storm structures capable of damaging wind gusts and isolated hail. Highest concentration of severe storms is currently expected to be across southern portions of Lower MI and adjacent northeast IN and northwest OH. Another round of thunderstorms is possible over the region as the cold front moves through this evening, but development of these storms is largely dependent on the strength of the antecedent storms and air mass recovery in their wake. ...Lower Great Lakes into the Northeast... Low-amplitude shortwave trough currently moving through the middle OH Valley will continue eastward/northeastward, reaching the Lower Great Lakes/Northeast region by the early afternoon. Despite relatively modest lapse rates, surface dewpoints in the upper 60s (isolated low 70s possible) and surface temperatures in the mid 80s will still support moderate buoyancy capable of occasionally strong updrafts. Vertical shear will be modest and a predominantly linear multicell mode is anticipated. Water-loaded downbursts are possible with strongest storms. ...Ozark Plateau into OK... A very warm and moist low-level air mass will remain in place across the region with afternoon dewpoints in the 70s and temperatures in the upper 90s/low 100s. Steep mid-level lapse rates atop this warm and moist air mass will result in very strong buoyancy (i.e. MLCAPE greater than 3000 J/kg) but also modest convective inhibition. Impetus for overcoming this convective inhibition and initiating deep updrafts is expected to be the cold front moving south through the region. However, location of the cold front this afternoon is uncertain, primarily because of potential modification of its position as a result of outflow from the ongoing MCS across KS. There is also some chance for the MCS to remain over northeast OK and the Ozark Plateau long enough to prevent air mass recovery. These uncertainties merit keeping Marginal severe probabilities for this forecast, but an upgrade may be needed in a subsequent outlook as these mesoscale details become more certain. ..Mosier/Nauslar.. 08/18/2019 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0100 AM CDT Sun Aug 18 2019 Valid 181200Z - 191200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER LOWER MI...NORTHEAST IN...AND FAR NORTHWEST OH... ...SUMMARY... Scattered thunderstorms capable of severe gusts and large hail are possible over Lower Michigan, northeast Indiana, and far northwest Ohio this afternoon into the early evening. ...Middle MS Valley through OH Valley and Upper Great Lakes... Well-organized MCS currently moving through southern MN and northern IA will likely be in the vicinity of the IA/IL border at the beginning of the period. The resulting convectively induced vorticity maximum and attendant isolated showers and thunderstorms are expected to gradually move eastward this morning. A very moist and diurnally destabilized air mass is expected downstream across Lower MI and the OH Valley. As a result, thunderstorms associated with this vorticity maximum are expected to reintensify as they move into Lower MI and the middle OH Valley this afternoon. The anticipated trajectory of vorticity maximum currently takes it over Lower MI during the afternoon. Enhanced mid-level flow will accompany this vorticity maximum, resulting in strong enough vertical shear to support more organized storm structures capable of damaging wind gusts and isolated hail. Highest concentration of severe storms is currently expected to be across southern portions of Lower MI and adjacent northeast IN and northwest OH. Another round of thunderstorms is possible over the region as the cold front moves through this evening, but development of these storms is largely dependent on the strength of the antecedent storms and air mass recovery in their wake. ...Lower Great Lakes into the Northeast... Low-amplitude shortwave trough currently moving through the middle OH Valley will continue eastward/northeastward, reaching the Lower Great Lakes/Northeast region by the early afternoon. Despite relatively modest lapse rates, surface dewpoints in the upper 60s (isolated low 70s possible) and surface temperatures in the mid 80s will still support moderate buoyancy capable of occasionally strong updrafts. Vertical shear will be modest and a predominantly linear multicell mode is anticipated. Water-loaded downbursts are possible with strongest storms. ...Ozark Plateau into OK... A very warm and moist low-level air mass will remain in place across the region with afternoon dewpoints in the 70s and temperatures in the upper 90s/low 100s. Steep mid-level lapse rates atop this warm and moist air mass will result in very strong buoyancy (i.e. MLCAPE greater than 3000 J/kg) but also modest convective inhibition. Impetus for overcoming this convective inhibition and initiating deep updrafts is expected to be the cold front moving south through the region. However, location of the cold front this afternoon is uncertain, primarily because of potential modification of its position as a result of outflow from the ongoing MCS across KS. There is also some chance for the MCS to remain over northeast OK and the Ozark Plateau long enough to prevent air mass recovery. These uncertainties merit keeping Marginal severe probabilities for this forecast, but an upgrade may be needed in a subsequent outlook as these mesoscale details become more certain. ..Mosier/Nauslar.. 08/18/2019 Read more

MD 1782 CONCERNING SEVERE THUNDERSTORM WATCH 593...595... FOR PORTIONS OF SOUTHERN MN...NORTHERN/CENTRAL IA...FAR SOUTHWESTERN WI...AND NORTHEASTERN NE
Mesoscale Discussion 1782 NWS Storm Prediction Center Norman OK 1200 AM CDT Sun Aug 18 2019 Areas affected...Portions of southern MN...northern/central IA...far southwestern WI...and northeastern NE Concerning...Severe Thunderstorm Watch 593...595... Valid 180500Z - 180630Z The severe weather threat for Severe Thunderstorm Watch 593, 595 continues. SUMMARY...A strong to damaging wind threat continues across Severe Thunderstorm Watch 593 and 595. Downstream watch issuance is possible in the next 1-2 hours depending on observational trends. DISCUSSION...A small bow echo is occurring across southwestern MN into northwestern IA per recent radar imagery. Measured severe wind gusts with this bow have generally remained sub-severe (50-56 mph) over the past couple of hours. Still, isolated strong to damaging wind gusts will remain possible with these storms as they continue eastward across northern IA and south-central MN over the next couple of hours. Instability decreases with eastward extent into northeastern IA and far southwestern WI per 04Z mesoanalysis. This lends some uncertainty to the intensity of this convection through the overnight hours. But, a 35-45 kt southwesterly low-level jet and similar values of effective bulk shear may support continued storm maintenance/intensity. Depending on observational trends, a downstream watch may be needed within the next 1-2 hours. In addition, some backbuilding of convection along a surface cold front may occur from northeastern NE into central IA. This activity would also pose an isolated wind/hail threat. Severe Thunderstorm Watch 593/595 may need to be extended in area and/or time to account for this potential. ..Gleason.. 08/18/2019 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...DVN...ARX...MPX...DMX...FSD...OAX... LAT...LON 42559823 43089701 43189580 43369523 43859498 44329532 44619497 44039186 43679081 42529081 41849228 41679520 41709749 42559823 Read more

WW 0594 Status Updates
STATUS REPORT ON WW 594 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 SSW HLC TO 30 WNW RSL TO 25 ESE MHK. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1781 ..GLEASON..08/18/19 ATTN...WFO...ICT...TOP...DDC...GID... STATUS REPORT FOR WS 594 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS KSC003-009-015-017-019-031-035-041-049-051-053-061-073-079-095- 105-111-113-115-127-135-143-145-155-159-165-167-169-173-185-191- 195-180540- KS . KANSAS COUNTIES INCLUDED ARE ANDERSON BARTON BUTLER CHASE CHAUTAUQUA COFFEY COWLEY DICKINSON ELK ELLIS ELLSWORTH GEARY GREENWOOD HARVEY KINGMAN LINCOLN LYON MCPHERSON MARION MORRIS NESS OTTAWA PAWNEE RENO RICE RUSH RUSSELL SALINE SEDGWICK STAFFORD SUMNER TREGO 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 0594 Status Updates
STATUS REPORT ON WW 594 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 SSW HLC TO 30 WNW RSL TO 25 ESE MHK. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1781 ..GLEASON..08/18/19 ATTN...WFO...ICT...TOP...DDC...GID... STATUS REPORT FOR WS 594 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS KSC003-009-015-017-019-031-035-041-049-051-053-061-073-079-095- 105-111-113-115-127-135-143-145-155-159-165-167-169-173-185-191- 195-180540- KS . KANSAS COUNTIES INCLUDED ARE ANDERSON BARTON BUTLER CHASE CHAUTAUQUA COFFEY COWLEY DICKINSON ELK ELLIS ELLSWORTH GEARY GREENWOOD HARVEY KINGMAN LINCOLN LYON MCPHERSON MARION MORRIS NESS OTTAWA PAWNEE RENO RICE RUSH RUSSELL SALINE SEDGWICK STAFFORD SUMNER TREGO 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 0595 Status Updates
STATUS REPORT ON WW 595 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 WNW RWF TO 35 NNW MKT TO 30 SSE MSP. ..GLEASON..08/18/19 ATTN...WFO...FSD...DMX...MPX... STATUS REPORT FOR WS 595 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC021-025-033-041-059-063-069-079-081-083-091-109-147-151-161- 187-189-195-197-180540- IA . IOWA COUNTIES INCLUDED ARE BUENA VISTA CALHOUN CERRO GORDO CLAY DICKINSON EMMET FRANKLIN HAMILTON HANCOCK HARDIN HUMBOLDT KOSSUTH PALO ALTO POCAHONTAS SAC WEBSTER WINNEBAGO WORTH WRIGHT MNC013-015-043-047-079-091-103-131-143-147-161-165-180540- MN . MINNESOTA COUNTIES INCLUDED ARE BLUE EARTH BROWN FARIBAULT FREEBORN LE SUEUR MARTIN NICOLLET RICE SIBLEY STEELE WASECA WATONWAN Read more

WW 0595 Status Updates
STATUS REPORT ON WW 595 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 WNW RWF TO 35 NNW MKT TO 30 SSE MSP. ..GLEASON..08/18/19 ATTN...WFO...FSD...DMX...MPX... STATUS REPORT FOR WS 595 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC021-025-033-041-059-063-069-079-081-083-091-109-147-151-161- 187-189-195-197-180540- IA . IOWA COUNTIES INCLUDED ARE BUENA VISTA CALHOUN CERRO GORDO CLAY DICKINSON EMMET FRANKLIN HAMILTON HANCOCK HARDIN HUMBOLDT KOSSUTH PALO ALTO POCAHONTAS SAC WEBSTER WINNEBAGO WORTH WRIGHT MNC013-015-043-047-079-091-103-131-143-147-161-165-180540- MN . MINNESOTA COUNTIES INCLUDED ARE BLUE EARTH BROWN FARIBAULT FREEBORN LE SUEUR MARTIN NICOLLET RICE SIBLEY STEELE WASECA WATONWAN Read more

WW 0595 Status Updates
STATUS REPORT ON WW 595 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 WNW RWF TO 35 NNW MKT TO 30 SSE MSP. ..GLEASON..08/18/19 ATTN...WFO...FSD...DMX...MPX... STATUS REPORT FOR WS 595 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC021-025-033-041-059-063-069-079-081-083-091-109-147-151-161- 187-189-195-197-180540- IA . IOWA COUNTIES INCLUDED ARE BUENA VISTA CALHOUN CERRO GORDO CLAY DICKINSON EMMET FRANKLIN HAMILTON HANCOCK HARDIN HUMBOLDT KOSSUTH PALO ALTO POCAHONTAS SAC WEBSTER WINNEBAGO WORTH WRIGHT MNC013-015-043-047-079-091-103-131-143-147-161-165-180540- MN . MINNESOTA COUNTIES INCLUDED ARE BLUE EARTH BROWN FARIBAULT FREEBORN LE SUEUR MARTIN NICOLLET RICE SIBLEY STEELE WASECA WATONWAN Read more

WW 0595 Status Updates
STATUS REPORT ON WW 595 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 WNW RWF TO 35 NNW MKT TO 30 SSE MSP. ..GLEASON..08/18/19 ATTN...WFO...FSD...DMX...MPX... STATUS REPORT FOR WS 595 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC021-025-033-041-059-063-069-079-081-083-091-109-147-151-161- 187-189-195-197-180540- IA . IOWA COUNTIES INCLUDED ARE BUENA VISTA CALHOUN CERRO GORDO CLAY DICKINSON EMMET FRANKLIN HAMILTON HANCOCK HARDIN HUMBOLDT KOSSUTH PALO ALTO POCAHONTAS SAC WEBSTER WINNEBAGO WORTH WRIGHT MNC013-015-043-047-079-091-103-131-143-147-161-165-180540- MN . MINNESOTA COUNTIES INCLUDED ARE BLUE EARTH BROWN FARIBAULT FREEBORN LE SUEUR MARTIN NICOLLET RICE SIBLEY STEELE WASECA WATONWAN Read more

WW 595 SEVERE TSTM IA MN 180315Z - 181000Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 595 NWS Storm Prediction Center Norman OK 1015 PM CDT Sat Aug 17 2019 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northern Iowa Southern Minnesota * Effective this Saturday night and Sunday morning from 1015 PM until 500 AM CDT. * Primary threats include... Scattered damaging winds likely with isolated significant gusts to 75 mph possible Scattered large hail and isolated very large hail events to 2 inches in diameter possible A tornado or two possible SUMMARY...A well-organized line of storms will continue to accelerate generally eastward across southern Minnesota and northern Iowa during the late evening and overnight hours. Damaging winds can be expected along with some hail and possibly a brief tornado risk. The severe thunderstorm watch area is approximately along and 55 statute miles east and west of a line from 45 miles north northwest of Mankato MN to 20 miles south southeast of Fort Dodge IA. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU5). 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 592...WW 593...WW 594... AVIATION...A few severe thunderstorms with hail surface and aloft to 2 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 550. Mean storm motion vector 28030. ...Guyer Read more

WW 0593 Status Updates
STATUS REPORT ON WW 593 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 SW ONL TO 20 NE YKN TO 35 SE FSD TO 35 SSW OTG TO 20 S OTG TO 10 ESE OTG TO 30 NNE OTG TO 30 WNW RWF TO 35 ENE RWF. ..GLEASON..08/18/19 ATTN...WFO...FSD...ABR...MPX...FGF...OAX...LBF... STATUS REPORT FOR WS 593 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC035-093-141-143-149-167-193-180540- IA . IOWA COUNTIES INCLUDED ARE CHEROKEE IDA O'BRIEN OSCEOLA PLYMOUTH SIOUX WOODBURY MNC033-063-127-129-180540- MN . MINNESOTA COUNTIES INCLUDED ARE COTTONWOOD JACKSON REDWOOD RENVILLE NEC003-027-043-051-107-139-179-180540- NE . NEBRASKA COUNTIES INCLUDED ARE Read more

WW 0593 Status Updates
STATUS REPORT ON WW 593 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 SW ONL TO 20 NE YKN TO 35 SE FSD TO 35 SSW OTG TO 20 S OTG TO 10 ESE OTG TO 30 NNE OTG TO 30 WNW RWF TO 35 ENE RWF. ..GLEASON..08/18/19 ATTN...WFO...FSD...ABR...MPX...FGF...OAX...LBF... STATUS REPORT FOR WS 593 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC035-093-141-143-149-167-193-180540- IA . IOWA COUNTIES INCLUDED ARE CHEROKEE IDA O'BRIEN OSCEOLA PLYMOUTH SIOUX WOODBURY MNC033-063-127-129-180540- MN . MINNESOTA COUNTIES INCLUDED ARE COTTONWOOD JACKSON REDWOOD RENVILLE NEC003-027-043-051-107-139-179-180540- NE . NEBRASKA COUNTIES INCLUDED ARE Read more

WW 0593 Status Updates
STATUS REPORT ON WW 593 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 SW ONL TO 20 NE YKN TO 35 SE FSD TO 35 SSW OTG TO 20 S OTG TO 10 ESE OTG TO 30 NNE OTG TO 30 WNW RWF TO 35 ENE RWF. ..GLEASON..08/18/19 ATTN...WFO...FSD...ABR...MPX...FGF...OAX...LBF... STATUS REPORT FOR WS 593 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC035-093-141-143-149-167-193-180540- IA . IOWA COUNTIES INCLUDED ARE CHEROKEE IDA O'BRIEN OSCEOLA PLYMOUTH SIOUX WOODBURY MNC033-063-127-129-180540- MN . MINNESOTA COUNTIES INCLUDED ARE COTTONWOOD JACKSON REDWOOD RENVILLE NEC003-027-043-051-107-139-179-180540- NE . NEBRASKA COUNTIES INCLUDED ARE Read more

WW 0593 Status Updates
STATUS REPORT ON WW 593 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 SW ONL TO 20 NE YKN TO 35 SE FSD TO 35 SSW OTG TO 20 S OTG TO 10 ESE OTG TO 30 NNE OTG TO 30 WNW RWF TO 35 ENE RWF. ..GLEASON..08/18/19 ATTN...WFO...FSD...ABR...MPX...FGF...OAX...LBF... STATUS REPORT FOR WS 593 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC035-093-141-143-149-167-193-180540- IA . IOWA COUNTIES INCLUDED ARE CHEROKEE IDA O'BRIEN OSCEOLA PLYMOUTH SIOUX WOODBURY MNC033-063-127-129-180540- MN . MINNESOTA COUNTIES INCLUDED ARE COTTONWOOD JACKSON REDWOOD RENVILLE NEC003-027-043-051-107-139-179-180540- NE . NEBRASKA COUNTIES INCLUDED ARE Read more

WW 593 SEVERE TSTM IA MN NE SD 172315Z - 180600Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 593 NWS Storm Prediction Center Norman OK 615 PM CDT Sat Aug 17 2019 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northwest Iowa Southwest Minnesota Northeast Nebraska Eastern South Dakota * Effective this Saturday night and Sunday morning from 615 PM until 100 AM CDT. * Primary threats include... Scattered damaging winds likely with isolated significant gusts to 75 mph possible Scattered large hail and isolated very large hail events to 2 inches in diameter possible A tornado or two possible SUMMARY...Ongoing storms across south-central/northeast South Dakota early this evening will continue eastward, with the possibility of additional/more isolated supercell development ahead of an evolving cluster of storms. Some tornado risk may exist for a time, particularly through mid-evening across southeast South Dakota. However, the overall most common risks should be large hail and damaging winds, which should become more of a concern later this evening as storm mergers occur and a more organized cluster/line develops. The severe thunderstorm watch area is approximately along and 130 statute miles north and south of a line from 30 miles north northeast of Worthington MN to 45 miles west southwest of Huron SD. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU3). 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 590...WW 591...WW 592... AVIATION...A few severe thunderstorms with hail surface and aloft to 2 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 600. Mean storm motion vector 28025. ...Guyer Read more

MD 1781 CONCERNING SEVERE THUNDERSTORM WATCH 594... FOR PORTIONS OF CENTRAL/SOUTHEASTERN KS
Mesoscale Discussion 1781 NWS Storm Prediction Center Norman OK 1106 PM CDT Sat Aug 17 2019 Areas affected...Portions of central/southeastern KS Concerning...Severe Thunderstorm Watch 594... Valid 180406Z - 180530Z The severe weather threat for Severe Thunderstorm Watch 594 continues. SUMMARY...An extension in area for Severe Thunderstorm Watch 594 into southeastern KS may be needed for a severe/damaging wind gust threat. DISCUSSION...A small thunderstorm cluster that strengthened from northwestern into north-central KS over the past few hours has produced multiple measured severe wind gusts across this region. Latest radar imagery shows this activity moving quickly southeastward around 40-45 kt from central into southeastern KS. Strong inbound velocities have been observed with these storms from the KICT radar, and VWP wind profile estimates show a 35-40 kt south-southwesterly low-level jet is present across this region. The airmass across southeastern KS remains strongly unstable this evening, with MLCAPE generally ranging from 3000-4000 J/kg. Even with some diurnal cooling and related convective inhibition, severe/damaging wind gusts potentially up to 60-70 mph will probably remain a threat with southeastward extent. Accordingly, an extension in area for Severe Thunderstorm Watch 594 may be needed into parts of southeastern KS. ..Gleason/Guyer.. 08/18/2019 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...TOP...ICT...DDC... LAT...LON 39029969 39089819 38649638 37919529 37089557 37109761 38549944 39029969 Read more

WW 0592 Status Updates
STATUS REPORT ON WW 592 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 SSE ITR TO 20 ESE ITR TO 50 W HLC TO 45 S HLC. WW 592 WILL BE ALLOWED TO EXPIRE AT 180400Z. ..GLEASON..08/18/19 ATTN...WFO...GLD... STATUS REPORT FOR WS 592 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS KSC063-109-179-181-193-199-180400- KS . KANSAS COUNTIES INCLUDED ARE GOVE LOGAN SHERIDAN SHERMAN THOMAS WALLACE 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