Alert archive / North Dakota / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 177, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Aug 24, 2012, 5:50 PM CDT for 4 counties in North Dakota. It was in force for 55 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 24, 2012, 5:50 PM CDT (22:50 UTC)
- Expired
- Aug 24, 2012, 6:45 PM CDT
- In force
- 55 min
- Issued by
- NWS Bismarck, ND
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Burleigh County, ND, McLean County, ND, Oliver County, ND, Sheridan County, ND
The radar
The Bismarck radar (KBIS), 76 km from the middle of the area, began a volume at 22:51 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 24, 5:54 PM CDT | HAIL 0.75 | Washburn, ND | |
| Aug 24, 6:28 PM CDT | HAIL 1 | 5 Ssw New Johns Lake, ND | 40 TO 50 MPH WINDS ALSO REPORTED. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 38 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 24, 5:17 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 10.8 hours before the alert went out and 76 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 7 J/kg
- Mixed-layer CIN
- -691 J/kg
- Mixed-layer LCL
- 2169 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
817 WUUS53 KBIS 242250 SVRBIS NDC015-055-065-083-242345- /O.NEW.KBIS.SV.W.0177.120824T2250Z-120824T2345Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BISMARCK ND 550 PM CDT FRI AUG 24 2012 THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN BURLEIGH COUNTY IN SOUTH CENTRAL NORTH DAKOTA SOUTHEASTERN MCLEAN COUNTY IN SOUTH CENTRAL NORTH DAKOTA NORTHEASTERN OLIVER COUNTY IN SOUTH CENTRAL NORTH DAKOTA SOUTHERN SHERIDAN COUNTY IN SOUTH CENTRAL NORTH DAKOTA * UNTIL 645 PM CDT * AT 547 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR CROSS RANCH STATE PARK...OR 32 MILES NORTHWEST OF BISMARCK...AND MOVING NORTHEAST AT 40 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... WASHBURN AROUND 555 PM CDT. MERCER AROUND 625 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS. && LAT...LON 4772 10066 4746 10007 4710 10095 4727 10125 TIME...MOT...LOC 2250Z 222DEG 33KT 4725 10102 WIND...HAIL 60MPH 1.00IN $$ KINNEY
1 follow-up statement
408 WWUS53 KBIS 242320 SVSBIS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 620 PM CDT FRI AUG 24 2012 NDC065-242330- /O.CAN.KBIS.SV.W.0177.000000T0000Z-120824T2345Z/ OLIVER ND- 620 PM CDT FRI AUG 24 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN OLIVER COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. LAT...LON 4721 10068 4744 10103 4772 10066 4746 10007 TIME...MOT...LOC 2320Z 222DEG 33KT 4739 10070 $$ NDC015-055-083-242345- /O.CON.KBIS.SV.W.0177.000000T0000Z-120824T2345Z/ BURLEIGH ND-MCLEAN ND-SHERIDAN ND- 620 PM CDT FRI AUG 24 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN SHERIDAN...SOUTHEASTERN MCLEAN AND NORTH CENTRAL BURLEIGH COUNTIES UNTIL 645 PM CDT... AT 618 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL... AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR NEW JOHNS LAKE...OR 39 MILES NORTH OF BISMARCK...MOVING NORTHEAST AT 40 MPH. LOCATIONS IMPACTED INCLUDE... TURTLE LAKE...MERCER...MCCLUSKY...DENHOFF...NEW JOHNS LAKE AND GOODRICH. PRECAUTIONARY/PREPAREDNESS ACTIONS... PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS IF YOU ARE IN THE PATH OF THIS STORM. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS. IF ON OR NEAR A LAKE OR RIVER...GET OUT OF THE WATER AND MOVE INDOORS OR INSIDE A VEHICLE. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. IN ADDITION...THUNDERSTORMS CAN PRODUCE LARGE CAPSIZING WAVES...EVEN ON SMALL BODIES OF WATER. MOVE INTO DOCK AND SEEK SAFE SHELTER NOW. DON'T BE CAUGHT ON THE WATER IN A THUNDERSTORM. && LAT...LON 4721 10068 4744 10103 4772 10066 4746 10007 TIME...MOT...LOC 2320Z 222DEG 33KT 4739 10070 WIND...HAIL 60MPH 1.50IN $$ VINING
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Bismarck, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 24, 4:19 PM CDT, 1 hour 31 minutes earlier.
Area forecast discussion, Aug 24, 4:19 PM CDT, 1 hour 31 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BISMARCK ND 419 PM CDT FRI AUG 24 2012 .SHORT TERM...TONIGHT THROUGH SATURDAY NIGHT... THE MAIN FORECAST ISSUES ARE SEVERE WEATHER POTENTIAL THROUGH THIS EVENING AND FIRE WEATHER CONCERNS. EXPECTING SOME POTENTIAL FOR SEVERE STORM INITIATION THROUGH THE LATER AFTERNOON AND EVENING HOURS...DESPITE RATHER LIMITED INSTABILITY. SEE LATEST SWOMCD FOR ADDITIONAL DETAILS. THINKING MOST FAVORABLE AREAS WILL BE ALONG AND EAST OF HIGHWAY 83. HAVE OPTED TO CONTINUE RED FLAG WARNING FOR ALL OF THE WESTERN THROUGH SOUTH CENTRAL COUNTIES THROUGH MID EVENING. AFTERNOON RH IS NOT AS LOW AS PREVIOUSLY EXPECTED ACROSS THE NORTHWEST COUNTIES LATE THIS AFTERNOON...BUT DID NOT FEEL COMFORTABLE DROPPING THE WARNING WITH THE IMPENDING GUSTY WEST WINDS. WILDFIRES CONTINUE IN ROUGH TERRAIN ACROSS PORTIONS OF SLOPE COUNTY...AND A FIRE IS ALSO EVIDENT ON SATELLITE IMAGERY IN FAR SOUTHERN SIOUX COUNTY. LOOKING AHEAD TO SATURDAY...STILL GETTING VERY HIGH FIRE DANGER INDEX VALUES ACROSS MUCH OF THE FORECAST AREA...IN PARTICULAR NORTHWEST COUNTIES. AFTERNOON TEMPERATURES WILL BE COOLER...BUT THE WEST WIND WILL BE RATHER STRONG. NOT ENOUGH CONFIDENCE AT THIS TIME TO UPGRADE FIRE WEATHER WATCH TO A RED FLAG WARNING...AND WILL LET LATER SHIFTS RE-EVALUATE. DRY AND COOLER CONDITIONS WILL CONTINUE SATURDAY NIGHT. .LONG TERM...SUNDAY THROUGH FRIDAY... THE MODELS BUILD AN UPPER LEVEL RIDGE OVER THE ROCKIES SUNDAY AND IT APPROACHES THE WESTERN PLAINS/DAKOTAS EARLY NEXT WEEK. THERE IS A HINT OF A BREAKDOWN IN THE RIDGE BY LATE NEXT WEEK...BUT THE MODELS DIVERGE IN THEIR SOLUTIONS AND CONFIDENCE LOW ON THE TIMING AND DEVELOPMENT OF THE SHORTWAVE MOVING THROUGH THE WESTERLIES. THUS HAVE KEPT THE FORECAST MAINLY DRY WITH ONLY A FEW PERIODS OF SLIGHT CHANCE MENTIONS. A GRADUAL WARMUP SUNDAY (HIGHS IN THE 80S) THROUGH TUESDAY (HIGHS 85 TO 95)...THEN MODERATING TEMPERATURES THROUGH THE END OF THE WEEK. && .AVIATION... SCATTERED TO ISOLATED SHOWERS AND THUNDERSTORMS EXTENDED FROM NEAR KISN TO KMOT TO NEAR KJMS. SURFACE LOW PRESSURE WAS OVER THE FAR WESTERN BORDER OF ND AND SD WITH A TROUGH EXTENDING FROM THE LOW TO NEAR KHEI TO NEAR KDIK TO EAST OF KISN. MEANWHILE A COLD FRONT EXTENDED NORTHWARD ALONG THE ND/MT BORDER AND INTO ANOTHER LOW IN CENTRAL SASKATCHEWAN. THE SLOW-MOVING COLD FRONT WILL MOVE EAST FROM WESTERN NORTH DAKOTA TO THE JAMES RIVER VALLEY TONIGHT. SHOWERS AND SCATTERED THUNDERSTORMS WILL FORM ALONG AND EAST OF THE TROUGH AND IN THE VICINITY OF THE FRONT THIS AFTERNOON AND TONIGHT. GUSTY SOUTH WINDS AHEAD OF THE TROUGH AND GUSTY WEST WINDS EXPECTED THIS EVENING AT KISN/KDIK TO SPREAD EAST AS THE COLD FRONT MOVES EAST ACROSS THE STATE. VFR AT ALL TAF SITES THROUGH THE TAF PERIOD...WITH VCTS AT KBIS/KMOT THROUGH 02Z...AND AT KJMS MAINLY AFTER 22Z THROUGH 06Z. SHOULD THE FRONT/TROUGH MOVE SLOWER...MAY NEED TO KEEP VCTS GOING FOR KBIS/KMOT/KJMS LONGER...CONFIDENCE LOW IN SPEED OF TROUGH/FRONT. && .BIS WATCHES/WARNINGS/ADVISORIES... FIRE WEATHER WATCH FROM SATURDAY AFTERNOON THROUGH SATURDAY EVENING FOR NDZ001>003-009>011-017>021-031>034-040>045. RED FLAG WARNING UNTIL 10 PM CDT /9 PM MDT/ THIS EVENING FOR NDZ001-009-017-018-031>033-040>045. && SHORT TERM...RK LONG TERM/AVIATION...JV
Hazardous weather outlook, Aug 24, 1:04 PM CDT, 4 hours 46 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BISMARCK ND 104 PM CDT FRI AUG 24 2012 NDZ001-009-017-018-031>033-040>045-251815- DIVIDE-WILLIAMS-MCKENZIE-DUNN-GOLDEN VALLEY-BILLINGS-STARK-SLOPE- HETTINGER-GRANT-BOWMAN-ADAMS-SIOUX- 104 PM CDT FRI AUG 24 2012 /1204 PM MDT FRI AUG 24 2012/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST NORTH DAKOTA...SOUTH CENTRAL NORTH DAKOTA AND SOUTHWEST NORTH DAKOTA. .DAY ONE...THIS AFTERNOON AND TONIGHT A RED FLAG WARNING IS IN EFFECT FOR WESTERN INTO SOUTH CENTRAL NORTH DAKOTA THIS AFTERNOON AND EVENING. STRONG WINDS...LOW RELATIVE HUMIDITY AND DRY FUELS WILL CREATE VERY HIGH FIRE DANGER. SCATTERED THUNDERSTORMS ARE FORECAST ACROSS WESTERN NORTH DAKOTA THIS AFTERNOON AND TONIGHT. THE THREAT FOR SEVERE WEATHER IS LOW ACROSS THE WEST...BUT SEVERE STORMS WILL BE POSSIBLE SOUTH CENTRAL DURING THE LATE AFTERNOON AND EVENING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY A FIRE WEATHER WATCH IS IN EFFECT FOR FAR WESTERN NORTH DAKOTA SATURDAY AFTERNOON AND EVENING. THUNDERSTORMS ARE POSSIBLE TUESDAY AND WEDNESDAY. THEY ARE NOT EXPECTED TO BE SEVERE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED ACROSS SOUTH CENTRAL NORTH DAKOTA LATE THIS AFTERNOON AND EVENING. NDZ002-003-010-011-019>021-034-251815- BURKE-RENVILLE-MOUNTRAIL-WARD-MERCER-OLIVER-MCLEAN-MORTON- 104 PM CDT FRI AUG 24 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL NORTH DAKOTA...NORTHWEST NORTH DAKOTA AND SOUTH CENTRAL NORTH DAKOTA. .DAY ONE...THIS AFTERNOON AND TONIGHT SCATTERED THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND EVENING. SOME STORMS IN CENTRAL AND EASTERN NORTH DAKOTA MAY BE SEVERE WITH LARGE HAIL AND DAMAGING WINDS THE MAIN THREATS. THE BEST CHANCE FOR SEVERE WEATHER WILL BE IN THE LATE AFTERNOON AND EARLY EVENING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THUNDERSTORMS ARE POSSIBLE TUESDAY AND WEDNESDAY. THEY ARE NOT EXPECTED TO BE SEVERE. A FIRE WEATHER WATCH IS IN EFFECT FOR SATURDAY...GENERALLY ALONG AND WEST OF HIGHWAY 83. STRONG WINDS...LOW RELATIVE HUMIDITY AND DRY FUELS MAY CREATE VERY HIGH FIRE DANGER. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON AND TONIGHT. NDZ004-005-012-013-022-023-025-035>037-046>048-050-051-251815- BOTTINEAU-ROLETTE-MCHENRY-PIERCE-SHERIDAN-WELLS-FOSTER-BURLEIGH- KIDDER-STUTSMAN-EMMONS-LOGAN-LA MOURE-MCINTOSH-DICKEY- 104 PM CDT FRI AUG 24 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL NORTH DAKOTA...SOUTH CENTRAL NORTH DAKOTA AND SOUTHEAST NORTH DAKOTA. .DAY ONE...THIS AFTERNOON AND TONIGHT SCATTERED THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND EVENING. SOME STORMS IN CENTRAL AND EASTERN NORTH DAKOTA MAY BE SEVERE WITH LARGE HAIL AND DAMAGING WINDS THE MAIN THREATS. THE BEST CHANCE FOR SEVERE WEATHER WILL BE IN THE LATE AFTERNOON AND EARLY EVENING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THUNDERSTORMS ARE POSSIBLE TUESDAY AND WEDNESDAY. THEY ARE NOT EXPECTED TO BE SEVERE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON AND TONIGHT. RK
In the hours before
Special weather statement, Aug 24, 4:57 PM CDT, 53 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 457 PM CDT FRI AUG 24 2012 NDZ011-012-019-021-022-242300- MCHENRY-MCLEAN-MERCER-SHERIDAN-WARD- 457 PM CDT FRI AUG 24 2012 ...SPECIAL WEATHER STATEMENT... AT 452 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER NORTHEASTERN MERCER COUNTY...MOVING NORTHEAST AT 45 MPH. NICKEL SIZE HAIL...WINDS UP TO 50 MPH...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... FORT STEVENSON STATE PARK... FALKIRK... UNDERWOOD... GARRISON... COLEHARBOR... TURTLE LAKE... MAX... BENEDICT... STRAWBERRY LAKE... RUSO... LOGAN... SAWYER... BUTTE... VOLTAIRE... VELVA... GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. KINNEY
Local storm report, Aug 24, 5:18 PM CDT, 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
518 PM CDT FRI AUG 24 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0507 PM HAIL HAZEN 47.29N 101.62W
08/24/2012 E1.00 INCH MERCER ND 911 CALL CENTER
HAZEN PD REPORTED QUARTER SIZED HAIL THAT LASTED FOR
5-7 MINUTES. RELAYED BY STATE RADIO.
&&
TMLocal storm report, Aug 24, 5:48 PM CDT, 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
548 PM CDT FRI AUG 24 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0534 PM HAIL 5 S RIVERDALE 47.43N 101.37W
08/24/2012 M1.00 INCH MCLEAN ND TRAINED SPOTTER
HAIL LASTED 8 MINUTES. ALSO STRONG WINDS AND HEAVY
RAIN.
&&
JVThe office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 4:33 PM CDT | Severe Thunderstorm Warning | BIS | Mercer, Oliver | 42 min |
| Aug 24, 5:15 PM CDT | Severe Thunderstorm Warning | BIS | McLean, Mercer, Oliver, Ward | 60 min |
| Aug 24, 6:04 PM CDT | Severe Thunderstorm Warning | BIS | Bottineau, McHenry, Renville, Ward | 56 min |
| Aug 24, 6:10 PM CDT | Severe Thunderstorm Warning | BIS | Burleigh, Emmons, Morton | 49 min |
| Aug 24, 6:30 PM CDT | Severe Thunderstorm Warning | BIS | Burleigh, Kidder, Sheridan | 45 min |
| Aug 24, 6:43 PM CDT | Severe Thunderstorm Warning | BIS | McHenry, McLean, Sheridan, Wells | 48 min |
| Aug 24, 6:56 PM CDT | Severe Thunderstorm Warning | BIS | Bottineau, McHenry | 49 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 2012Every severe thunderstorm warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.