Severe Storms

WW 0573 Status Updates
STATUS REPORT ON WW 573 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..COOK..08/12/19 ATTN...WFO...GGW... STATUS REPORT FOR WS 573 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC021-033-055-069-071-079-083-085-105-109-120240- MT . MONTANA COUNTIES INCLUDED ARE DAWSON GARFIELD MCCONE PETROLEUM PHILLIPS PRAIRIE RICHLAND ROOSEVELT VALLEY 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

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0759 PM CDT Sun Aug 11 2019 Valid 120100Z - 121200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF MT AND ALONG THE KS/NE BORDER... ...SUMMARY... Scattered to numerous severe thunderstorms are likely across portions of the northern and central Great Plains. Damaging wind gusts, and large hail remain possible. ...01z Update... Strong convection that developed off the higher terrain of southeast WY/CO is gradually maturing as it advances east into more moist/buoyant air mass, especially along the NE/KS border. Latest diagnostic data exhibits seasonally large CAPE values with adequate shear for an upward evolving MCS. Organizing cluster of storms over northeast CO/northwest KS is expected to propagate east this evening, just north of a synoptic front draped along the I-70 corridor. As this activity matures, damaging wind threat should increase, especially if a bow-type squall line evolves. Farther north, strongly forced convection over central MT is spreading east into the northern High Plains. This activity is expected to remain organized, possibly evolving into an MCS as it approaches the ND border region. With LLJ expected to focus across western Dakotas tonight, a long-lived convective event seems likely. ..Darrow.. 08/12/2019 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0759 PM CDT Sun Aug 11 2019 Valid 120100Z - 121200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF MT AND ALONG THE KS/NE BORDER... ...SUMMARY... Scattered to numerous severe thunderstorms are likely across portions of the northern and central Great Plains. Damaging wind gusts, and large hail remain possible. ...01z Update... Strong convection that developed off the higher terrain of southeast WY/CO is gradually maturing as it advances east into more moist/buoyant air mass, especially along the NE/KS border. Latest diagnostic data exhibits seasonally large CAPE values with adequate shear for an upward evolving MCS. Organizing cluster of storms over northeast CO/northwest KS is expected to propagate east this evening, just north of a synoptic front draped along the I-70 corridor. As this activity matures, damaging wind threat should increase, especially if a bow-type squall line evolves. Farther north, strongly forced convection over central MT is spreading east into the northern High Plains. This activity is expected to remain organized, possibly evolving into an MCS as it approaches the ND border region. With LLJ expected to focus across western Dakotas tonight, a long-lived convective event seems likely. ..Darrow.. 08/12/2019 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0759 PM CDT Sun Aug 11 2019 Valid 120100Z - 121200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF MT AND ALONG THE KS/NE BORDER... ...SUMMARY... Scattered to numerous severe thunderstorms are likely across portions of the northern and central Great Plains. Damaging wind gusts, and large hail remain possible. ...01z Update... Strong convection that developed off the higher terrain of southeast WY/CO is gradually maturing as it advances east into more moist/buoyant air mass, especially along the NE/KS border. Latest diagnostic data exhibits seasonally large CAPE values with adequate shear for an upward evolving MCS. Organizing cluster of storms over northeast CO/northwest KS is expected to propagate east this evening, just north of a synoptic front draped along the I-70 corridor. As this activity matures, damaging wind threat should increase, especially if a bow-type squall line evolves. Farther north, strongly forced convection over central MT is spreading east into the northern High Plains. This activity is expected to remain organized, possibly evolving into an MCS as it approaches the ND border region. With LLJ expected to focus across western Dakotas tonight, a long-lived convective event seems likely. ..Darrow.. 08/12/2019 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0759 PM CDT Sun Aug 11 2019 Valid 120100Z - 121200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF MT AND ALONG THE KS/NE BORDER... ...SUMMARY... Scattered to numerous severe thunderstorms are likely across portions of the northern and central Great Plains. Damaging wind gusts, and large hail remain possible. ...01z Update... Strong convection that developed off the higher terrain of southeast WY/CO is gradually maturing as it advances east into more moist/buoyant air mass, especially along the NE/KS border. Latest diagnostic data exhibits seasonally large CAPE values with adequate shear for an upward evolving MCS. Organizing cluster of storms over northeast CO/northwest KS is expected to propagate east this evening, just north of a synoptic front draped along the I-70 corridor. As this activity matures, damaging wind threat should increase, especially if a bow-type squall line evolves. Farther north, strongly forced convection over central MT is spreading east into the northern High Plains. This activity is expected to remain organized, possibly evolving into an MCS as it approaches the ND border region. With LLJ expected to focus across western Dakotas tonight, a long-lived convective event seems likely. ..Darrow.. 08/12/2019 Read more

WW 0573 Status Updates
STATUS REPORT ON WW 573 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..COOK..08/12/19 ATTN...WFO...GGW... STATUS REPORT FOR WS 573 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC021-033-055-069-071-079-083-085-105-109-120140- MT . MONTANA COUNTIES INCLUDED ARE DAWSON GARFIELD MCCONE PETROLEUM PHILLIPS PRAIRIE RICHLAND ROOSEVELT VALLEY 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 0571 Status Updates
STATUS REPORT ON WW 571 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1707 ..COOK..08/12/19 ATTN...WFO...BYZ...UNR... STATUS REPORT FOR WT 571 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC003-009-011-017-025-037-065-075-087-095-103-111-120140- MT . MONTANA COUNTIES INCLUDED ARE BIG HORN CARBON CARTER CUSTER FALLON GOLDEN VALLEY MUSSELSHELL POWDER RIVER ROSEBUD STILLWATER TREASURE YELLOWSTONE SDC019-033-047-063-081-093-102-103-105-120140- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE BUTTE CUSTER FALL RIVER HARDING LAWRENCE MEADE OGLALA LAKOTA PENNINGTON PERKINS WYC005-011-033-045-120140- WY Read more

MD 1708 CONCERNING SEVERE THUNDERSTORM WATCH 570... FOR NORTHEAST COLORADO AND WESTERN NEBRASKA
Mesoscale Discussion 1708 NWS Storm Prediction Center Norman OK 0713 PM CDT Sun Aug 11 2019 Areas affected...northeast Colorado and western Nebraska Concerning...Severe Thunderstorm Watch 570... Valid 120013Z - 120215Z The severe weather threat for Severe Thunderstorm Watch 570 continues. SUMMARY...Severe weather continues moving quickly eastward across WW 570, and will shift east of the watch in northwest Nebraska over the next hour. A new WW may be needed. DISCUSSION...Latest radar loop shows storms now accelerating eastward across WW 570, moving into downstream Tornado Watch 572 in southwest Nebraska/northwest Kansas and far northeast Colorado. Farther north, storms will begin moving out of the watch across northwest Nebraska. With risk for primarily damaging winds potentially accompanying this convection as it exits the eastern fringe of WW 572, a new WW, or WW extension in area, may be needed. ..Goss.. 08/12/2019 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LBF...UNR...GLD...PUB...BOU...CYS... LAT...LON 38500338 38810394 39880361 40590369 42080385 42840368 43200127 42630032 41710052 41350229 40710248 38500338 Read more

WW 0569 Status Updates
STATUS REPORT ON WW 569 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 ENE WEY TO 25 NNE LVM TO 20 SW LWT TO 50 S HVR. ..COOK..08/11/19 ATTN...WFO...TFX...BYZ... STATUS REPORT FOR WS 569 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC027-097-107-120040- MT . MONTANA COUNTIES INCLUDED ARE FERGUS SWEET GRASS WHEATLAND 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 0569 Status Updates
STATUS REPORT ON WW 569 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 ENE WEY TO 25 NNE LVM TO 20 SW LWT TO 50 S HVR. ..COOK..08/11/19 ATTN...WFO...TFX...BYZ... STATUS REPORT FOR WS 569 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC027-097-107-120040- MT . MONTANA COUNTIES INCLUDED ARE FERGUS SWEET GRASS WHEATLAND 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 0569 Status Updates
STATUS REPORT ON WW 569 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 ENE WEY TO 25 NNE LVM TO 20 SW LWT TO 50 S HVR. ..COOK..08/11/19 ATTN...WFO...TFX...BYZ... STATUS REPORT FOR WS 569 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC027-097-107-120040- MT . MONTANA COUNTIES INCLUDED ARE FERGUS SWEET GRASS WHEATLAND 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 0569 Status Updates
STATUS REPORT ON WW 569 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 ENE WEY TO 25 NNE LVM TO 20 SW LWT TO 50 S HVR. ..COOK..08/11/19 ATTN...WFO...TFX...BYZ... STATUS REPORT FOR WS 569 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC027-097-107-120040- MT . MONTANA COUNTIES INCLUDED ARE FERGUS SWEET GRASS WHEATLAND 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 0570 Status Updates
STATUS REPORT ON WW 570 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NNW PUB TO 30 WSW AKO TO 30 ESE CYS TO 60 WNW CDR. ..GOSS..08/11/19 ATTN...WFO...BOU...CYS... STATUS REPORT FOR WS 570 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS COC039-073-075-087-095-115-121-120040- CO . COLORADO COUNTIES INCLUDED ARE ELBERT LINCOLN LOGAN MORGAN PHILLIPS SEDGWICK WASHINGTON NEC007-013-033-045-105-123-157-165-120040- NE . NEBRASKA COUNTIES INCLUDED ARE BANNER BOX BUTTE CHEYENNE DAWES KIMBALL MORRILL SCOTTS BLUFF SIOUX 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 0570 Status Updates
STATUS REPORT ON WW 570 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NNW PUB TO 30 WSW AKO TO 30 ESE CYS TO 60 WNW CDR. ..GOSS..08/11/19 ATTN...WFO...BOU...CYS... STATUS REPORT FOR WS 570 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS COC039-073-075-087-095-115-121-120040- CO . COLORADO COUNTIES INCLUDED ARE ELBERT LINCOLN LOGAN MORGAN PHILLIPS SEDGWICK WASHINGTON NEC007-013-033-045-105-123-157-165-120040- NE . NEBRASKA COUNTIES INCLUDED ARE BANNER BOX BUTTE CHEYENNE DAWES KIMBALL MORRILL SCOTTS BLUFF SIOUX 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 0570 Status Updates
STATUS REPORT ON WW 570 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NNW PUB TO 30 WSW AKO TO 30 ESE CYS TO 60 WNW CDR. ..GOSS..08/11/19 ATTN...WFO...BOU...CYS... STATUS REPORT FOR WS 570 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS COC039-073-075-087-095-115-121-120040- CO . COLORADO COUNTIES INCLUDED ARE ELBERT LINCOLN LOGAN MORGAN PHILLIPS SEDGWICK WASHINGTON NEC007-013-033-045-105-123-157-165-120040- NE . NEBRASKA COUNTIES INCLUDED ARE BANNER BOX BUTTE CHEYENNE DAWES KIMBALL MORRILL SCOTTS BLUFF SIOUX 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 0570 Status Updates
STATUS REPORT ON WW 570 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NNW PUB TO 30 WSW AKO TO 30 ESE CYS TO 60 WNW CDR. ..GOSS..08/11/19 ATTN...WFO...BOU...CYS... STATUS REPORT FOR WS 570 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS COC039-073-075-087-095-115-121-120040- CO . COLORADO COUNTIES INCLUDED ARE ELBERT LINCOLN LOGAN MORGAN PHILLIPS SEDGWICK WASHINGTON NEC007-013-033-045-105-123-157-165-120040- NE . NEBRASKA COUNTIES INCLUDED ARE BANNER BOX BUTTE CHEYENNE DAWES KIMBALL MORRILL SCOTTS BLUFF SIOUX 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 570 SEVERE TSTM CO NE WY 111925Z - 120200Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 570 NWS Storm Prediction Center Norman OK 125 PM MDT Sun Aug 11 2019 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northeast Colorado Western Nebraska Panhandle Southeast Wyoming * Effective this Sunday afternoon and evening from 125 PM until 800 PM MDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 75 mph possible Isolated very large hail events to 2 inches in diameter possible A tornado or two possible SUMMARY...A few supercells should develop just east of the Denver metro area along the I-76 corridor into northeast Colorado, while clusters are more predominant farther north across southeast Wyoming into the Nebraska Panhandle. The severe thunderstorm watch area is approximately along and 55 statute miles east and west of a line from 55 miles west northwest of Chadron NE to 35 miles east southeast of Colorado Springs CO. 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 569... 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 500. Mean storm motion vector 24030. ...Grams Read more

WW 0572 Status Updates
STATUS REPORT ON WW 572 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..GOSS..08/11/19 ATTN...WFO...GLD...LBF... STATUS REPORT FOR WT 572 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS COC017-063-125-120040- CO . COLORADO COUNTIES INCLUDED ARE CHEYENNE KIT CARSON YUMA KSC023-039-063-071-109-153-179-181-193-199-203-120040- KS . KANSAS COUNTIES INCLUDED ARE CHEYENNE DECATUR GOVE GREELEY LOGAN RAWLINS SHERIDAN SHERMAN THOMAS WALLACE WICHITA NEC029-049-057-063-085-087-101-111-135-145-120040- NE . NEBRASKA COUNTIES INCLUDED ARE CHASE DEUEL DUNDY FRONTIER HAYES HITCHCOCK Read more

WW 0570 Status Updates
STATUS REPORT ON WW 570 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NNW PUB TO 30 WSW AKO TO 30 ESE CYS TO 60 WNW CDR. ..GOSS..08/11/19 ATTN...WFO...BOU...CYS... STATUS REPORT FOR WS 570 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS COC039-073-075-087-095-115-121-120040- CO . COLORADO COUNTIES INCLUDED ARE ELBERT LINCOLN LOGAN MORGAN PHILLIPS SEDGWICK WASHINGTON NEC007-013-033-045-105-123-157-165-120040- NE . NEBRASKA COUNTIES INCLUDED ARE BANNER BOX BUTTE CHEYENNE DAWES KIMBALL MORRILL SCOTTS BLUFF SIOUX 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 570 SEVERE TSTM CO NE WY 111925Z - 120200Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 570 NWS Storm Prediction Center Norman OK 125 PM MDT Sun Aug 11 2019 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northeast Colorado Western Nebraska Panhandle Southeast Wyoming * Effective this Sunday afternoon and evening from 125 PM until 800 PM MDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 75 mph possible Isolated very large hail events to 2 inches in diameter possible A tornado or two possible SUMMARY...A few supercells should develop just east of the Denver metro area along the I-76 corridor into northeast Colorado, while clusters are more predominant farther north across southeast Wyoming into the Nebraska Panhandle. The severe thunderstorm watch area is approximately along and 55 statute miles east and west of a line from 55 miles west northwest of Chadron NE to 35 miles east southeast of Colorado Springs CO. 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 569... 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 500. Mean storm motion vector 24030. ...Grams Read more