Alert archive / North Dakota / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 43, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Jul 21, 1993, 11:50 PM MDT for Grant County, North Dakota. It was in force for 40 min.
The area
The counties it named.
The facts
- Issued
- Jul 21, 1993, 11:50 PM MDT (05:50 UTC)
- Expired
- Jul 22, 1993, 12:30 AM MDT
- In force
- 40 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
County Grant County, ND
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 5.8 hours before the alert went out and 85 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
- 59 J/kg
- Mixed-layer CIN
- -285 J/kg
- Mixed-layer LCL
- 825 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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, Jul 21, 7:12 PM MDT, 4 hours 38 minutes before
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</html>Special weather statement, Jul 21, 8:18 PM MDT, 3 hours 32 minutes before
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</html>Special weather statement, Jul 21, 10:26 PM MDT, 1 hour 24 minutes before
NDZ001>004-006>008-220515- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 1020 PM MDT WED JUL 21 1993 ..STRONG THUNDERSTORMS CONTINUE TO MOVE ACROSS SOUTHWEST NORTH DAKOTA.. ...A FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 6 AM MDT/7 AM CDT FOR WESTERN AND SOUTH CENTRAL NORTH DAKOTA... AT 1015 PM MDT WEATHER RADAR INDICATED A LARGE AREA OF THUNDERSTORMS OVER SOUTHWEST NORTH DAKOTA MOVING NORTH NORTHEAST AT 20 MPH. THE STRONGEST THUNDERSTORM WAS 25 MILES SOUTH OF DICKINSON...OR 5 MILES EAST OF NEW ENGLAND. THIS STORM LIKELY CONTAINS PEA TO MARBLE SIZE HAIL... DANGEROUS LIGHTNING...GUSTY WINDS...AND VERY HEAVY RAIN WHICH MAY CAUSE LOCALIZED FLOODING. PERSONS IN EASTERN HETTINGER AND EASTERN STARK COUNTIES SHOULD MOVE TO A PLACE OF SAFETY SHOULD THREATENING WEATHER APPROACH. REMEMBER...THE POTENTIAL FOR FLASH FLOODING IS HIGH TONIGHT. PERSONS IN FLOOD PRONE AREAS SHOULD BE PREPARED TO MOVE TO HIGH GROUND SHOULD FLOODING DEVELOP. DO NOT ATTEMPT TO DRIVE ACROSS FLOODED ROADS. LEBLANG
Special weather statement, Jul 21, 11:27 PM MDT, 23 minutes before
NDZ001>014-220625- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 1225 AM CDT THU JUL 22 1993 ..STRONG THUNDERSTORMS COVER CENTRAL AND WESTERN NORTH DAKOTA... ...A FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 6 AM MDT/7 AM CDT FOR WESTERN AND SOUTH CENTRAL NORTH DAKOTA... AT 1225 AM CDT WEATHER RADARS INDICATED TWO LARGE AREA OF THUNDERSTORMS. THE FIRST AREA COVERED MOST OF THE WESTERN THIRD OF THE STATE. THE SECOND AREA EXTENDED FROM JAMESTOWN TO JUST SOUTH OF MINOT. WHILE BOTH AREAS WERE MOVING TO THE NORTH-NORTHEAST AT 20 MPH SOME OF THE INDIVIDUAL THUNDERSTORMS WERE MOVING AT 40 MPH. THESE STORMS WERE PRODUCING VERY HEAVY RAIN...WINDS OVER 50 MPH AND PEA SIZE HAIL. SOME LOCALIZED FLOODING IS LIKELY FROM THESE STORMS. OTHER THUNDERSTORMS WERE DEVELOPING NORTH OF MINOT AND EAST OF DEVILS LAKE. THESE ALSO HAVE THE POTENTIAL OF PRODUCING VERY HEAVY RAIN... STRONG WINDS AND HAIL. REMEMBER...THE POTENTIAL FOR FLASH FLOODING IS HIGH TONIGHT. EVERYONE IN FLOOD PRONE AREAS SHOULD BE PREPARED TO MOVE TO HIGH GROUND SHOULD FLOODING DEVELOP. DO NOT ATTEMPT TO DRIVE ACROSS FLOODED ROADS. KAS
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 10:11 PM MDT | Severe Thunderstorm Warning | BIS | McKenzie | 64 min |
| Jul 21, 10:49 PM MDT | Severe Thunderstorm Warning | BIS | Williams | 56 min |
| Jul 21, 11:43 PM MDT | Severe Thunderstorm Warning | BIS | Divide | 62 min |
| Jul 22, 2:03 AM MDT | Flash Flood Warning | BIS | Morton | 87 min |
| Jul 22, 5:25 PM MDT | Tornado Warning | BIS | McLean, Ward | 35 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1993Every severe thunderstorm warning in 1993
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.