Alert archive / North Dakota / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 9, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at May 21, 1994, 3:10 PM CDT for Logan County, North Dakota. It was in force for 65 min.
The area
The counties it named.
The facts
- Issued
- May 21, 1994, 3:10 PM CDT (20:10 UTC)
- Expired
- May 21, 1994, 4:15 PM CDT
- In force
- 65 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
County Logan County, ND
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 8.2 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
- 7 J/kg
- Mixed-layer CIN
- -175 J/kg
- Mixed-layer LCL
- 1041 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- -41 m²/s²
- 0-3 km storm-relative helicity
- -5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS1 KBIS 212010 RRA SVRBIS NDC047-212115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BISMARCK ND 310 PM CDT SAT MAY 21 1994 THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 415 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL NORTH DAKOTA ...WESTERN LOGAN COUNTY AT 305 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR NAPOLEON NORTH DAKOTA...45 MILES SOUTHEAST OF BISMARCK MOVING EAST AT 15 MILES AN HOUR. THIS WARNING INCLUDES THE TOWN OF NAPOLEON. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. THIS SLOW MOVING THUNDERSTORM MAY CAUSE FLOODING OF SMALL STREAMS AND UNDERPASSES. RR
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 21, 11:37 AM CDT, 3 hours 33 minutes before
NDZ019>023-034>036-042>047-050-211730- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 1135 AM CDT SAT MAY 21 1994 ...THUNDERSTORMS WITH VERY HEAVY RAIN DEVELOPING IN SOUTH CENTRAL NORTH DAKOTA... AT 1130 AM CDT RADAR DETECTED DEVELOPING THUNDERSTORMS 20 MILES WEST OF MANDAN AND 35 MILES SOUTHWEST OF BISMARCK NEAR FLASHER. VERY HEAVY RAIN WAS DETECTED IN THESE STORMS. MOVEMENT WAS NORTHEAST AT 25 MPH. THUNDERSTORMS WILL MOVE OVER THE BISMARCK/MANDAN AREA UNTIL ABOUT 1 PM CDT. STREET FLOODING AND FLOODING OF LOW LYING AREAS IS POSSIBLE. WHEN THESE STORMS APPROACH...SEEK SHELTER FROM THE LIGHTNING AND HEAVY RAIN. NOAH
Special weather statement, May 21, 12:28 PM CDT, 2 hours 42 minutes before
NDZ019>023-034>036-042>047-050-211930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 1225 PM CDT SAT MAY 21 1994 ...THUNDERSTORMS WITH VERY HEAVY RAIN NEAR BISMARCK... AT 1220 PM CDT RADAR LOCATED THUNDERSTORMS 25 MILES SOUTHWEST OF BISMARCK. VERY HEAVY RAIN WAS DETECTED IN THESE STORMS AS THEY CONTINUED TO MOVE NORTHEAST AT 25 MPH. SOME STREET FLOODING AND FLOODING OF LOW LYING AREAS IS POSSIBLE. WHEN THESE STORMS APPROACH..(.SEEK SHELTER FROM THE LIGHTNING AND HEAVY RAIN. RR
Special weather statement, May 21, 2:07 PM CDT, 1 hour 3 minutes before
NDZ001>053-212100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 205 PM CDT SAT MAY 21 1994 ...THUNDERSTORMS CONTINUING OVER CENTRAL NORTH DAKOTA... AT 205 PM CDT SCATTERED THUNDERSTORMS WERE OCCURRING OVER CENTRAL NORTH DAKOTA. THE STRONGEST STORM WAS LOCATED NEAR WASHBURN...30 MILES NORTH OF BISMARCK. THIS THUNDERSTORM DROPPED MARBLE SIZE HAIL AROUND 1 PM CDT. ALL OF THE THUNDERSTORMS WERE MOVING NORTH NORTHEAST AT 30 TO 35 HMILES AN HOUR.
Special weather statement, May 21, 2:09 PM CDT, 1 hour 1 minute before
NDZ001>053-212100- SPECIAL WEATHER STATEMENT ...CORRECTION...TIME OF HAIL... NATIONAL WEATHER SERVICE BISMARCK ND 205 PM CDT SAT MAY 21 1994 ...THUNDERSTORMS CONTINUING OVER CENTRAL NORTH DAKOTA... AT 205 PM CDT SCATTERED THUNDERSTORMS WERE OCCURRING OVER CENTRAL NORTH DAKOTA. THE STRONGEST STORM WAS LOCATED NEAR WASHBURN...30 MILES NORTH OF BISMARCK. THIS THUNDERSTORM DROPPED MARBLE SIZE HAIL AROUND 2 PM CDT. ALL OF THE THUNDERSTORMS WELRE MOVING NORTH NORTHEAST AT 30 TO 35 MILES AN HOUR.
Special weather statement, May 21, 2:21 PM CDT, 49 minutes before
NDZ002-010-212020- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLISTON ND 217 PM CDT SAT MAY 21 1994 ...DEVELOPING THUNDERSTORMS OVER NORTHWEST ORTH DAKOTA... AT 210 PM CDT WILLISTON RADAR INDICATED TWO RAPIDLY DEVELOPING THUNDERSTORMS. THE FIRST THUNDERSTORM WAS 40 MILES NORHEAST OF WILLISTON...OR 10 MILES SOUTHWEST OF POWERS LAKE IN MOUNTRAIL COUNTY. CURRENT MOVEMENT OF THE STORM WILL PLACE POWERS LAKE AND BATTLEVIEW IN THE PATH OF THE STORM. THE SECOND THUNDERSTORM WAS 65 MILS NORTHEAST OF WILLISTON...15 MILES SOUTHWEST OF BOWBELL IN BURKE COUNTY. THIS STORM WILL BE PASSING IN OR NEAR THE TOWNS OF LIGNIGHT...BOWBELLS...FLAXTON AND COTEAU. STRONG GUSTY WINDS...FREQUENXT LIGHTNING...VERY HEAVY RAINFALL AND SMALL HAIL MAY ACCOMPANY THESE STORMS. IN OPEN AREAS...GO TO A LOW PLACE SUCH AS A RAVINE OR VALLEY. LEWIS
Special weather statement, May 21, 2:31 PM CDT, 39 minutes before
NDZ002-010-212020- SPECIAL WEATHER STATEMENTSPELLING... NATIONAL WEATHER SERVICE WILLISTON ND 217 PM CDT SAT MAY 21 1994 ...DEVELOPING THUNDERSTORMS OVER NORTHWEST NORTH DAKOTA... AT 210 PM CDT WILLISTON RADAR INDICATED TWO RAPIDLY DEVELOPING THUNDERSTORMS. THE FIRST THUNDERSTORM WAS 40 MILES NORHEAST OF WILLISTON...OR 10 MILES SOUTHWEST OF POWERS LAKE IN MOUNTRAIL COUNTY. CURRENT MOVEMENT OF THE STORM WILL PLACE POWERS LAKE AND BATTLEVIEW IN THE PATH OF THE STORM. THE SECOND THUNDERSTORM WAS 65 MILS NORTHEAST OF WILLISTON...15 MILES SOUTHWEST OF BOWBELL IN BURKE COUNTY. THIS STORM WILL BE PASSING IN OR NEAR THE TOWNS OF LIGNIGHT...BOWBELLS...FLAXTON AND COTEAU. STRONG GUSTY WhINDS...FREQUENT LIGHTNING...VERY HEAVY RAINFALL AND SMALL HAIL MAY ACCOMPANY THESE STORMS. IN OPEN AREAS...GO TO A LOW PLACE SUCH AS A RAVINE OR VALLEY. LEWIS
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 2:23 PM CDT | Severe Thunderstorm Warning | BIS | McLean, Sheridan | 52 min |
| May 21, 3:23 PM CDT | Severe Thunderstorm Warning | BIS | Sheridan | 22 min |
| May 21, 3:43 PM CDT | Severe Thunderstorm Warning | BIS | Renville | 47 min |
| May 21, 4:33 PM CDT | Severe Thunderstorm Warning | BIS | Renville | 42 min |
| May 21, 4:59 PM CDT | Severe Thunderstorm Warning | BIS | McLean, Oliver | 61 min |
| May 21, 5:42 PM CDT | Severe Thunderstorm Warning | BIS | Ward | 63 min |
| May 21, 6:02 PM CDT | Severe Thunderstorm Warning | BIS | McLean | 28 min |
| May 21, 6:46 PM CDT | Severe Thunderstorm Warning | BIS | McHenry | 59 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1994Every severe thunderstorm warning in 1994
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.