Alert archive / North Dakota / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 11, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at May 21, 2012, 7:33 PM CDT for Burleigh County, McLean County, Oliver County, North Dakota. It was in force for 42 min. 1 report 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
- May 21, 2012, 7:33 PM CDT (00:33 UTC)
- Expired
- May 21, 2012, 8:15 PM CDT
- In force
- 42 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
The radar
The Bismarck radar (KBIS), 38 km from the middle of the area, began a volume at 00:35 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 |
|---|---|---|---|
| May 21, 8:05 PM CDT | HAIL 0.75 | 4 Nw Baldwin, ND |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
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 nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 0.6 hours before the alert went out and 39 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
- 300 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 2012 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 127 m²/s²
- 0-3 km storm-relative helicity
- 266 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
544 WUUS53 KBIS 220033 SVRBIS NDC015-055-065-220115- /O.NEW.KBIS.SV.W.0011.120522T0033Z-120522T0115Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BISMARCK ND 733 PM CDT MON MAY 21 2012 THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WEST CENTRAL BURLEIGH COUNTY IN SOUTH CENTRAL NORTH DAKOTA EXTREME SOUTHEASTERN MCLEAN COUNTY IN SOUTH CENTRAL NORTH DAKOTA EAST CENTRAL OLIVER COUNTY IN SOUTH CENTRAL NORTH DAKOTA * UNTIL 815 PM CDT * AT 731 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 6 MILES SOUTHWEST OF SANGER...OR 25 MILES NORTHWEST OF BISMARCK...AND MOVING EAST AT 30 MPH. * LOCATIONS IMPACTED INCLUDE... SANGER...PRICE...WILTON...BALDWIN AND REGAN. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS. && LAT...LON 4718 10046 4696 10059 4705 10114 4721 10110 TIME...MOT...LOC 0033Z 273DEG 27KT 4711 10106 WIND...HAIL 60MPH 1.00IN $$ ABELING
3 follow-up statements
876 WWUS53 KBIS 220047 SVSBIS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 747 PM CDT MON MAY 21 2012 NDC015-055-065-220115- /O.CON.KBIS.SV.W.0011.000000T0000Z-120522T0115Z/ BURLEIGH ND-MCLEAN ND-OLIVER ND- 747 PM CDT MON MAY 21 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL OLIVER...EXTREME SOUTHEASTERN MCLEAN AND WEST CENTRAL BURLEIGH COUNTIES UNTIL 815 PM CDT... AT 744 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR PRICE...OR 22 MILES NORTH OF BISMARCK...MOVING EAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... WILTON...BALDWIN AND REGAN. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS. && LAT...LON 4718 10046 4696 10059 4703 10101 4720 10098 TIME...MOT...LOC 0047Z 273DEG 27KT 4710 10091 WIND...HAIL 60MPH 1.00IN $$ ABELING
730 WWUS53 KBIS 220056 SVSBIS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 756 PM CDT MON MAY 21 2012 NDC055-220106- /O.CAN.KBIS.SV.W.0011.000000T0000Z-120522T0115Z/ MCLEAN ND- 756 PM CDT MON MAY 21 2012 ...THE SEVERE THUNDERSTORM WARNING FOR EXTREME SOUTHEASTERN MCLEAN COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. LAT...LON 4696 10059 4704 10095 4715 10096 4718 10046 TIME...MOT...LOC 0056Z 279DEG 27KT 4709 10081 $$ NDC015-065-220115- /O.CON.KBIS.SV.W.0011.000000T0000Z-120522T0115Z/ BURLEIGH ND-OLIVER ND- 756 PM CDT MON MAY 21 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EXTREME EAST CENTRAL OLIVER AND WEST CENTRAL BURLEIGH COUNTIES UNTIL 815 PM CDT... AT 752 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR PRICE...OR 20 MILES NORTH OF BISMARCK...MOVING EAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... BALDWIN AND REGAN. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS. && LAT...LON 4696 10059 4704 10095 4715 10096 4718 10046 TIME...MOT...LOC 0056Z 279DEG 27KT 4709 10081 WIND...HAIL 60MPH 1.00IN $$ ABELING
094 WWUS53 KBIS 220114 SVSBIS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 814 PM CDT MON MAY 21 2012 NDC015-065-220124- /O.EXP.KBIS.SV.W.0011.000000T0000Z-120522T0115Z/ BURLEIGH ND-OLIVER ND- 814 PM CDT MON MAY 21 2012 ...THE SEVERE THUNDERSTORM WARNING FOR EXTREME EAST CENTRAL OLIVER AND WEST CENTRAL BURLEIGH COUNTIES WILL EXPIRE AT 815 PM CDT/715 PM MDT/... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. HOWEVER SMALL HAIL UP TO PENNY SIZE IS STILL POSSIBLE WITH THIS THUNDERSTORM. LAT...LON 4696 10059 4704 10095 4715 10096 4718 10046 TIME...MOT...LOC 0114Z 279DEG 27KT 4707 10061 $$ ABELING
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 May 21, 7:01 PM CDT, 32 minutes earlier.
Area forecast discussion, May 21, 7:01 PM CDT, 32 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BISMARCK ND 701 PM CDT MON MAY 21 2012 .DISCUSSION...THUNDERSTORMS HAVE POPPED UP ALONG A COLD FRONT/DRY LINE MOVING THROUGH THE CENTRAL SECTIONS OF THE STATE THIS EVENING. THIS IS ALONG A LINE OF NARROW INSTABILITY THAT IS MOVING QUICKLY EAST. EXPECT A FEW HOURS OF THUNDERSTORMS THAN OUT. ADJUSTED THE POPS/WEATHER GRIDS FOR THIS FOR THE EARLY EVENING. && .AVIATION...A LINE OF INSTABILITY ALONG A WEAK FRONTAL BOUNDARY MOVING THROUGH CENTRAL NORTH DAKOTA AT 7 PM CDT. EXPECT A FEW THUNDERSTORMS THIS EVENING CENTRAL...WITH KBIS ON THE SOUTHERN POTENTIAL AND KMOT ON THE NORTH. AFTER 03Z...THE THUNDERSTORM THREAT WILL BE GREATLY DIMINISHED. ANOTHER COLD FRONT WILL MOVE INTO THE STATE ON TUESDAY AFTERNOON AND WILL BE THE FOCUS FOR MORE THUNDERSTORMS THIS WILL MAINLY EFFECT KISN/KMOT IN THE AFTERNOON. VFR AT ALL TAF SITES THROUGH 7 PM CDT TUESDAY. && .BIS WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM...WAA AVIATION...WAA
Hazardous weather outlook, May 21, 2:58 PM CDT, 4 hours 35 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BISMARCK ND 258 PM CDT MON MAY 21 2012 NDZ001>005-009>013-017>023-025-031>037-040>048-050-051-222000- DIVIDE-BURKE-RENVILLE-BOTTINEAU-ROLETTE-WILLIAMS-MOUNTRAIL-WARD- MCHENRY-PIERCE-MCKENZIE-DUNN-MERCER-OLIVER-MCLEAN-SHERIDAN-WELLS- FOSTER-GOLDEN VALLEY-BILLINGS-STARK-MORTON-BURLEIGH-KIDDER- STUTSMAN-SLOPE-HETTINGER-GRANT-BOWMAN-ADAMS-SIOUX-EMMONS-LOGAN- LA MOURE-MCINTOSH-DICKEY- 258 PM CDT MON MAY 21 2012 /158 PM MDT MON MAY 21 2012/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL NORTH DAKOTA...NORTHWEST NORTH DAKOTA...SOUTH CENTRAL NORTH DAKOTA...SOUTHEAST NORTH DAKOTA AND SOUTHWEST NORTH DAKOTA. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED THUNDERSTORMS ARE POSSIBLE LATE THIS AFTERNOON INTO THE EVENING...BUT ORGANIZED SEVERE WEATHER IS NOT ANTICIPATED. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE IS A CHANCE FOR SEVERE THUNDERSTORMS TUESDAY AFTERNOON INTO TUESDAY NIGHT...GENERALLY ALONG AND EAST OF A LINE FROM CROSBY TO HETTINGER. THE MAIN SEVERE WEATHER THREATS WILL BE HAIL TO THE SIZE OF GOLF BALLS AND WIND GUSTS OF 60 MPH. THERE IS A CHANCE OF THUNDERSTORMS ACROSS SOUTHERN AND FAR WESTERN NORTH DAKOTA ON THURSDAY. THE CHANCE OF THUNDERSTORMS RETURNS TO ALL OF WESTERN AND CENTRAL NORTH DAKOTA FRIDAY NIGHT INTO MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TUESDAY AFTERNOON AND EVENING. CK/AYD
In the hours before
Local storm report, May 21, 6:45 PM CDT, 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
645 PM CDT MON MAY 21 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0643 PM HAIL 6 E HAZEN 47.29N 101.49W
05/21/2012 E0.75 INCH MERCER ND TRAINED SPOTTER
&&
LHUBERSpecial weather statement, May 21, 6:48 PM CDT, 45 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 648 PM CDT MON MAY 21 2012 NDZ019>021-220030- MCLEAN ND-MERCER ND-OLIVER ND- 648 PM CDT MON MAY 21 2012 ...SPECIAL WEATHER STATEMENT FOR NORTHEASTERN OLIVER...EASTERN MERCER AND SOUTHERN MCLEAN COUNTIES UNTIL 730 PM CDT... AT 642 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 40 MILES NORTHWEST OF MANDAN...OR 44 MILES NORTHWEST OF BISMARCK...MOVING EAST AT 25 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. AT 638 PM CDT...DIME SIZE HAIL COVERING THE GROUND 6 MILES EAST OF HAZEN WAS REPORTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... FORT CLARK... HENSLER... WASHBURN... CROSS RANCH STATE PARK... SANGER... THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. ABELING
Special weather statement, May 21, 7:22 PM CDT, 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 722 PM CDT MON MAY 21 2012 NDZ020-021-035-220100- BURLEIGH ND-MCLEAN ND-OLIVER ND- 722 PM CDT MON MAY 21 2012 ...SPECIAL WEATHER STATEMENT FOR EASTERN OLIVER...SOUTHEASTERN MCLEAN AND NORTHWESTERN BURLEIGH COUNTIES UNTIL 800 PM CDT... AT 724 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 32 MILES NORTH OF MANDAN TO 21 MILES NORTHWEST OF MANDAN...AND MOVING EAST AT 30 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE STORMS...ALONG WITH FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE... CROSS RANCH STATE PARK... SANGER... PRICE... WILTON... NEW JOHNS LAKE... BALDWIN... THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. ABELING
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 8:41 PM CDT | Severe Thunderstorm Warning | BIS | Burleigh, Kidder | 64 min |
| May 22, 4:07 PM CDT | Severe Thunderstorm Warning | BIS | Divide | 53 min |
| May 22, 4:57 PM CDT | Severe Thunderstorm Warning | BIS | Divide | 63 min |
| May 22, 6:03 PM CDT | Severe Thunderstorm Warning | BIS | Mountrail, Renville, Ward | 57 min |
| May 22, 6:16 PM CDT | Tornado Warning | BIS | Mountrail | 29 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.