Alert archive / North Dakota / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 7, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at May 14, 1991, 8:45 PM CDT for Logan County, North Dakota. It was in force for 45 min.
The area
The counties it named.
The facts
- Issued
- May 14, 1991, 8:45 PM CDT (01:45 UTC)
- Expired
- May 14, 1991, 9:30 PM CDT
- In force
- 45 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
County Logan County, ND
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 1.8 hours before the alert went out and 100 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2593 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 177 m²/s²
- 0-3 km storm-relative helicity
- 481 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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.
In the hours before
Special weather statement, May 14, 6:04 PM CDT, 2 hours 41 minutes before
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</html>Special weather statement, May 14, 6:20 PM CDT, 2 hours 25 minutes before
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</html>Special weather statement, May 14, 7:13 PM CDT, 1 hour 32 minutes before
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</html>Special weather statement, May 14, 8:07 PM CDT, 38 minutes before
NDZ001>018-150200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 805 PM CDT TUE MAY 14 1991 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR A PORTION OF SOUTHEAST AND SOUTH CENTRAL NORTH DAKOTA UNTIL 1 AM CDT... AT 8 PM CDT WEATHER RADAR INDICATED A LINE OF THUNDERSTORMS FROM 25 MILES SOUTHEAST OF BISMARCK TO THE SOUTH DAKOTA LINE...70 MILES SOUTHWEST OF BISMARCK WEST OF SELFRIDGE. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 15 MPH. THE STRONGEST THUNDERSTORM WAS LOCATED 40 MILES SOUTHEAST OF BISMARCK BETWEEN STRASBURG AND LINTON. PEA SIZE HAIL WAS REPORTED AT STRASBURG AT 750 PM CDT. THE THUNDERSTORM WILL BE IN LINTON BY 810 PM CDT. OTHER STRONG THUNDERSTORMS WERE LOCATED 20 MILES SOUTHEAST OF BISMARCK IN NORTHERN EMMONS COUNTY. THESE THUNDERSTORMS WILL PRODUCE EXTREMELY HEAVY RAIN...HAIL AND GUSTY WINDS. THE THUNDERSTORMS HAVE BEEN MOVING SLOWLY NORTHWARD AND MAY ALSO PRODUCE SMALL STREAM RISES AND PONDING OF WATER AS WELL AS STREET FLOODING. THE ATMOSPHERE IS VERY UNSTABLE OVER SOUTH CENTRAL AND SOUTHEAST NORTH DAKOTA. THERE IS A POTENTIAL FOR ANY OF THESE THUNDERSTORMS TO RAPIDLY BECOME SEVERE. FOR THIS REASON PERSONS IN SOUTH CENTRAL AND SOUTHEAST# NORTH DAKOTA SHOULD BE PREPARED TO SEEK SHELTER IF THREATENING WEATHER APPROACHES. VAN ESS
Special weather statement, May 14, 8:42 PM CDT, 3 minutes before
NDZ003>018-150230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 840 PM CDT TUE MAY 14 1991 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR A PORTION OF SOUTHEAST AND SOUTH CENTRAL NORTH DAKOTA UNTIL 1 AM CDT... AT 8 PM CDT A LARGE AREA OF SHOWERS AND THUNDERSTORMS EXTENDED FROM 50 MILES EAST OF BISMARCK TO 100 MILES SOUTHWEST OF BISMARCK. THE STRONGEST THUNDERSTORMS WERE IN A LINE FROM 40 MILES SOUTHEAST OF BISMARCK IN NAPOLEON TO 70 MILES SOUTHEAST OF BISMARCK WEST OF ASHLEY. THESE THUNDERSTORMS WERE IN WESTERN LOBAN AND MCINTOSH COUNTIES. AT 835 PM CDT PEA TO MARBLE SIZE HAIL WAS REPORTED IN NAPOLEON. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 15 MPH. OTHER STRONG THUNDERSTORMS WERE LOCATED 25 MILES SOUTHEAST OF BISMARCK NEAR MOFFIT AND 20 MILES SOUTHWEST OF BISMARCK IN SOUTHERN MORTON COUNTY. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 15 MPH. THE ATMOSPHERE IS VERY UNSTABLE OVER SOUTH CENTRAL AND SOUTHREAST NORTH DAKOTA. THERE IS A POTENTIAL FOR ANY OF THESE THUNDERSTORMS TO RAPIDLY BECOME SEVERE. FOR THIS REASON PERSONS IN SOUTH CENTRAL AND SOUTHEAST NORTH DAKOTA SHOULD BE PREPARED TO SEEK SHELTER IF THREATENING WEATHER APPROACHES. VAN ESS
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 9:48 PM CDT | Severe Thunderstorm Warning | BIS | Stutsman | 42 min |
| May 14, 10:22 PM CDT | Tornado Warning | BIS | Stutsman | 28 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1991Every severe thunderstorm warning in 1991
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.