Severe Storms

WW 573 SEVERE TSTM MT 112305Z - 120700Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 573 NWS Storm Prediction Center Norman OK 505 PM MDT Sun Aug 11 2019 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northeast Montana * Effective this Sunday afternoon and Monday morning from 505 PM until 100 AM MDT. * Primary threats include... Scattered damaging wind gusts to 70 mph likely Scattered large hail and isolated very large hail events to 2 inches in diameter possible A tornado or two possible SUMMARY...Clusters of thunderstorms over central Montana will track east-northeastward across the watch area this evening. A few supercells and bow echoes capable of damaging winds and large hail are possible. The severe thunderstorm watch area is approximately along and 80 statute miles north and south of a line from 85 miles west southwest of Glasgow MT to 10 miles north northeast of Sidney MT. 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 569...WW 570...WW 571...WW 572... AVIATION...A few severe thunderstorms with hail surface and aloft to 2 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 26030. ...Hart Read more

MD 1712 CONCERNING SEVERE THUNDERSTORM WATCH 574... FOR SOUTHERN NEBRASKA/NORTHERN KANSAS
Mesoscale Discussion 1712 NWS Storm Prediction Center Norman OK 1130 PM CDT Sun Aug 11 2019 Areas affected...southern Nebraska/northern Kansas Concerning...Severe Thunderstorm Watch 574... Valid 120430Z - 120630Z The severe weather threat for Severe Thunderstorm Watch 574 continues. SUMMARY...Severe risk continues across WW 574 -- particularly across the north-central Kansas/south-central Nebraska border counties. Risk for damaging winds, including the possibility for winds in excess of 70 MPH, remains evident. DISCUSSION...Latest radar loop shows a well-defined bow echo moving east-northeastward at 45 kt across the southern Nebraska/northern Kansas area, with the surging apex of the bow right along the border, affecting Harlon and Franklin Counties in Nebraska, and Phillips and Smith Counties in Kansas. While no obs sites have been in the direct path of the bow's apex, where the strongest winds are indicated by radar, gusts in excess of 70 MPH appear likely to be occurring. With a very moist/unstable airmass downstream of the convection available to continue to fuel stout updrafts, expect damaging wind risk to continue spreading across the watch area. ..Goss.. 08/12/2019 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...OAX...TOP...ICT...GID...LBF...DDC...GLD... LAT...LON 38730022 39050033 40840038 41099636 39249659 38730022 Read more

WW 0572 Status Updates
STATUS REPORT ON WW 572 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 55 SSE GLD TO 25 E GLD TO 40 S MCK TO 20 WSW MCK TO 55 ENE SNY. ..GOSS..08/12/19 ATTN...WFO...GLD...LBF... STATUS REPORT FOR WT 572 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS KSC039-063-109-179-193-120440- KS . KANSAS COUNTIES INCLUDED ARE DECATUR GOVE LOGAN SHERIDAN THOMAS NEC063-085-087-101-111-135-145-120440- NE . NEBRASKA COUNTIES INCLUDED ARE FRONTIER HAYES HITCHCOCK KEITH LINCOLN PERKINS RED WILLOW 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 0572 Status Updates
STATUS REPORT ON WW 572 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 55 SSE GLD TO 25 E GLD TO 40 S MCK TO 20 WSW MCK TO 55 ENE SNY. ..GOSS..08/12/19 ATTN...WFO...GLD...LBF... STATUS REPORT FOR WT 572 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS KSC039-063-109-179-193-120440- KS . KANSAS COUNTIES INCLUDED ARE DECATUR GOVE LOGAN SHERIDAN THOMAS NEC063-085-087-101-111-135-145-120440- NE . NEBRASKA COUNTIES INCLUDED ARE FRONTIER HAYES HITCHCOCK KEITH LINCOLN PERKINS RED WILLOW 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 0572 Status Updates
STATUS REPORT ON WW 572 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 55 SSE GLD TO 25 E GLD TO 40 S MCK TO 20 WSW MCK TO 55 ENE SNY. ..GOSS..08/12/19 ATTN...WFO...GLD...LBF... STATUS REPORT FOR WT 572 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS KSC039-063-109-179-193-120440- KS . KANSAS COUNTIES INCLUDED ARE DECATUR GOVE LOGAN SHERIDAN THOMAS NEC063-085-087-101-111-135-145-120440- NE . NEBRASKA COUNTIES INCLUDED ARE FRONTIER HAYES HITCHCOCK KEITH LINCOLN PERKINS RED WILLOW 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 0572 Status Updates
STATUS REPORT ON WW 572 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 55 SSE GLD TO 25 E GLD TO 40 S MCK TO 20 WSW MCK TO 55 ENE SNY. ..GOSS..08/12/19 ATTN...WFO...GLD...LBF... STATUS REPORT FOR WT 572 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS KSC039-063-109-179-193-120440- KS . KANSAS COUNTIES INCLUDED ARE DECATUR GOVE LOGAN SHERIDAN THOMAS NEC063-085-087-101-111-135-145-120440- NE . NEBRASKA COUNTIES INCLUDED ARE FRONTIER HAYES HITCHCOCK KEITH LINCOLN PERKINS RED WILLOW 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 572 TORNADO CO KS NE 112045Z - 120400Z
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 572 NWS Storm Prediction Center Norman OK 245 PM MDT Sun Aug 11 2019 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Far eastern Colorado Northwest Kansas Southwest Nebraska * Effective this Sunday afternoon and evening from 245 PM until 1000 PM MDT. * Primary threats include... A couple tornadoes possible Scattered damaging winds and isolated significant gusts to 85 mph likely Scattered large hail and isolated very large hail events to 2.5 inches in diameter possible SUMMARY...Multiple discrete supercells will develop into far eastern Colorado with all severe hazards possible. These storms will likely consolidate and evolve into a bowing MCS that accelerates east along the Kansas-Nebraska border. This will yield an increasing risk for significant severe wind gusts later this evening. The tornado watch area is approximately along and 90 statute miles north and south of a line from 65 miles west southwest of Imperial NE to 25 miles south southeast of Mccook NE. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU2). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and 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. && OTHER WATCH INFORMATION...CONTINUE...WW 569...WW 570...WW 571... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 2.5 inches. Extreme turbulence and surface wind gusts to 75 knots. A few cumulonimbi with maximum tops to 600. Mean storm motion vector 25035. ...Grams Read more

WW 0573 Status Updates
STATUS REPORT ON WW 573 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 NW MLS TO 50 N MLS TO 30 SW OLF TO 25 WNW OLF TO 35 NE GGW TO 60 NNE GGW. ..COOK..08/12/19 ATTN...WFO...GGW... STATUS REPORT FOR WS 573 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC021-055-079-083-085-109-120440- MT . MONTANA COUNTIES INCLUDED ARE DAWSON MCCONE PRAIRIE RICHLAND ROOSEVELT WIBAUX 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 0573 Status Updates
STATUS REPORT ON WW 573 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 NW MLS TO 50 N MLS TO 30 SW OLF TO 25 WNW OLF TO 35 NE GGW TO 60 NNE GGW. ..COOK..08/12/19 ATTN...WFO...GGW... STATUS REPORT FOR WS 573 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC021-055-079-083-085-109-120440- MT . MONTANA COUNTIES INCLUDED ARE DAWSON MCCONE PRAIRIE RICHLAND ROOSEVELT WIBAUX 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

MD 1711 CONCERNING TORNADO WATCH 571... FOR SOUTHEASTERN MONTANA...FAR NORTHERN WYOMING...AND WESTERN/CENTRAL SOUTH DAKOTA
Mesoscale Discussion 1711 NWS Storm Prediction Center Norman OK 0945 PM CDT Sun Aug 11 2019 Areas affected...southeastern Montana...far northern Wyoming...and western/central South Dakota Concerning...Tornado Watch 571... Valid 120245Z - 120345Z The severe weather threat for Tornado Watch 571 continues. SUMMARY...Portions of WW 571 will need to be extended for a few more hours to address the ongoing severe threats in the WW areas. DISCUSSION...Ongoing convective clusters/linear complexes continue to forward-propagate eastward across remaining portions of WW 571 - one cluster over southeastern MT just east of Billings and another near /south of PHP. The pre-convective environments ahead of these storms remain supportive of all modes of severe weather, though hail and wind are the main threats given storm mode. The linear complex in Montana has a history of severe wind gusts and significant hail, and although substantial overturning/stabilization has occurred across western South Dakota and vicinity, this stabilized air will probably not impact the ongoing severe MCS in that area for the next couple of hours or so. ..Cook.. 08/12/2019 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...ABR...BIS...LBF...UNR...BYZ...GGW... LAT...LON 46910705 46960592 46440354 45540187 44310104 43669992 43299961 43059984 42930092 43170166 43950191 44820233 45290376 45210476 44940579 44740629 44580682 44830762 45180803 45670820 46410774 46680741 46910705 Read more

WW 0574 Status Updates
STATUS FOR WATCH 0574 HAS NOT BEEN ISSUED YET Read more

WW 0574 Status Updates
STATUS FOR WATCH 0574 HAS NOT BEEN ISSUED YET Read more

WW 0571 Status Updates
STATUS REPORT ON WW 571 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 60 E CDR TO 30 SW PHP TO 30 NW PHP TO 65 NNE RAP TO 35 SSE 2WX TO 45 SW 2WX TO 25 SSE 4BQ TO 30 SE SHR. ..COOK..08/12/19 ATTN...WFO...BYZ...UNR... STATUS REPORT FOR WT 571 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC003-011-017-025-075-087-103-120340- MT . MONTANA COUNTIES INCLUDED ARE BIG HORN CARTER CUSTER FALLON POWDER RIVER ROSEBUD TREASURE SDC007-055-063-071-095-105-121-123-137-120340- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE BENNETT HAAKON HARDING JACKSON MELLETTE PERKINS TODD TRIPP ZIEBACH WYC033-120340- WY . WYOMING COUNTIES INCLUDED ARE Read more

WW 0571 Status Updates
STATUS REPORT ON WW 571 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 60 E CDR TO 30 SW PHP TO 30 NW PHP TO 65 NNE RAP TO 35 SSE 2WX TO 45 SW 2WX TO 25 SSE 4BQ TO 30 SE SHR. ..COOK..08/12/19 ATTN...WFO...BYZ...UNR... STATUS REPORT FOR WT 571 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC003-011-017-025-075-087-103-120340- MT . MONTANA COUNTIES INCLUDED ARE BIG HORN CARTER CUSTER FALLON POWDER RIVER ROSEBUD TREASURE SDC007-055-063-071-095-105-121-123-137-120340- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE BENNETT HAAKON HARDING JACKSON MELLETTE PERKINS TODD TRIPP ZIEBACH WYC033-120340- WY . WYOMING COUNTIES INCLUDED ARE Read more

WW 0571 Status Updates
STATUS REPORT ON WW 571 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 60 E CDR TO 30 SW PHP TO 30 NW PHP TO 65 NNE RAP TO 35 SSE 2WX TO 45 SW 2WX TO 25 SSE 4BQ TO 30 SE SHR. ..COOK..08/12/19 ATTN...WFO...BYZ...UNR... STATUS REPORT FOR WT 571 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC003-011-017-025-075-087-103-120340- MT . MONTANA COUNTIES INCLUDED ARE BIG HORN CARTER CUSTER FALLON POWDER RIVER ROSEBUD TREASURE SDC007-055-063-071-095-105-121-123-137-120340- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE BENNETT HAAKON HARDING JACKSON MELLETTE PERKINS TODD TRIPP ZIEBACH WYC033-120340- WY . WYOMING COUNTIES INCLUDED ARE Read more

WW 571 TORNADO MT SD WY 112000Z - 120300Z
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 571 NWS Storm Prediction Center Norman OK 200 PM MDT Sun Aug 11 2019 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Southern Montana Western South Dakota Northeast Wyoming * Effective this Sunday afternoon and evening from 200 PM until 900 PM MDT. * Primary threats include... A couple tornadoes possible Scattered damaging winds and isolated significant gusts to 80 mph possible Scattered large hail and isolated very large hail events to 3 inches in diameter possible SUMMARY...Multiple discrete supercells will progress east-northeast from northeast Wyoming and south-central Montana. Large hail and a couple tornadoes should be the primary threat during the first few hours. Severe wind gust potential will increase later into the evening as cells likely consolidate into one or more clusters, especially across southern Montana. The tornado watch area is approximately along and 85 statute miles north and south of a line from 20 miles west northwest of Billings MT to 50 miles northeast of Rapid City SD. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU1). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and 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. && OTHER WATCH INFORMATION...CONTINUE...WW 569...WW 570... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 3 inches. Extreme turbulence and surface wind gusts to 70 knots. A few cumulonimbi with maximum tops to 550. Mean storm motion vector 24030. ...Grams Read more

MD 1710 CONCERNING TORNADO WATCH 572... FOR SOUTHERN NEBRASKA AND NORTHERN KANSAS
Mesoscale Discussion 1710 NWS Storm Prediction Center Norman OK 0911 PM CDT Sun Aug 11 2019 Areas affected...southern Nebraska and northern Kansas Concerning...Tornado Watch 572... Valid 120211Z - 120415Z The severe weather threat for Tornado Watch 572 continues. SUMMARY...Tornado risk has diminished some across the watch, while risk for damaging winds and marginal hail continues. Wind risk is expected to spread eastward out of the watch over the next couple of hours, with new WW expected. DISCUSSION...Latest radar loop shows that earlier, supercell storms have congealed into an eastward-moving storm cluster, with a rather strong mesolow moving out of Cheyenne and into Rawlins County in Kansas. At this time, it appears that damaging wind risk will not only continue within WW 572, but will also spread eastward, downstream of the watch with time. Given the very moist boundary layer/unstable airmass in place across the central Plains, risk will likely warrant new watch issuance, possibly including southeast Nebraska and northeast Kansas. ..Goss/Hart.. 08/12/2019 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...OAX...TOP...ICT...GID...LBF...DDC...GLD...PUB... BOU... LAT...LON 38510213 39310258 40380193 41020228 41320199 41390043 41589705 39409669 38179817 38280111 38300188 38510213 Read more

MD 1709 CONCERNING SEVERE THUNDERSTORM WATCH 573... FOR NORTHEASTERN MONTANA
Mesoscale Discussion 1709 NWS Storm Prediction Center Norman OK 0838 PM CDT Sun Aug 11 2019 Areas affected...northeastern Montana Concerning...Severe Thunderstorm Watch 573... Valid 120138Z - 120245Z The severe weather threat for Severe Thunderstorm Watch 573 continues. SUMMARY...The severe threat continues across WW 573. DISCUSSION...Storms have congealed into a forward-propagating linear complex over the past couple of hours while migrating eastward into WW 573. Based on radar and objective analyses, the greatest severe threat with this activity appears to be tied to the southern end of this complex, where surface-based buoyancy is strongest (around 2000 J/kg). Although instability is lower with northward and eastward extent, the organized nature of the convection, 40 kts of deep shear, and weak to moderate instability should foster at least an isolated, yet continued threat for damaging wind gusts as storms move through the WW. Storms should reach the eastern extent of the WW through 05Z or so, though it is uncertain whether storms will maintain their intensity with eastward extent toward the MT/ND border region where surface temperatures cool into the mid 60s F. Behind the line, the severe threat will diminish such that those portions of WW 573 may be cancelled early. ..Cook.. 08/12/2019 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...BIS...BYZ...GGW...TFX... LAT...LON 48970818 49150704 49080482 48660400 47370389 46680388 46480477 46540599 46650718 46620795 46780847 47760863 48410851 48970818 Read more

WW 0572 Status Updates
STATUS REPORT ON WW 572 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 SW ITR TO 35 SSW IML TO 40 W IML. ..GOSS..08/12/19 ATTN...WFO...GLD...LBF... STATUS REPORT FOR WT 572 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS COC017-063-120240- CO . COLORADO COUNTIES INCLUDED ARE CHEYENNE KIT CARSON KSC023-039-063-071-109-153-179-181-193-199-203-120240- KS . KANSAS COUNTIES INCLUDED ARE CHEYENNE DECATUR GOVE GREELEY LOGAN RAWLINS SHERIDAN SHERMAN THOMAS WALLACE WICHITA NEC029-049-057-063-085-087-101-111-135-145-120240- NE . NEBRASKA COUNTIES INCLUDED ARE CHASE DEUEL DUNDY Read more

WW 0571 Status Updates
STATUS REPORT ON WW 571 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..COOK..08/12/19 ATTN...WFO...BYZ...UNR... STATUS REPORT FOR WT 571 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC003-009-011-017-025-037-065-075-087-095-103-111-120240- MT . MONTANA COUNTIES INCLUDED ARE BIG HORN CARBON CARTER CUSTER FALLON GOLDEN VALLEY MUSSELSHELL POWDER RIVER ROSEBUD STILLWATER TREASURE YELLOWSTONE SDC019-033-047-063-081-093-102-103-105-120240- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE BUTTE CUSTER FALL RIVER HARDING LAWRENCE MEADE OGLALA LAKOTA PENNINGTON PERKINS WYC005-011-033-045-120240- WY . WYOMING COUNTIES INCLUDED ARE Read more