Alert archive / North Dakota / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 77, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Jul 6, 1991, 8:42 PM CDT for McIntosh County, North Dakota. It was in force for 63 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 6, 1991, 8:42 PM CDT (01:42 UTC)
- Expired
- Jul 6, 1991, 9:45 PM CDT
- In force
- 63 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
County McIntosh County, ND
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 6, 8:45 PM CDT | Hail 0.75 | Mcintosh, ND |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 1.7 hours before the alert went out and 121 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
- 288 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 1976 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 351 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.7
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 6, 4:56 PM CDT, 3 hours 46 minutes before
NDZ001>014-060000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 455 PM CDT SAT JUL 6 1991 ...THUNDERSTORMS DEVELOPING RAPIDLY OVER CENTRAL NORTH DAKOTA... AT 450 PM CDT...A LINE OF THUNDERSTORMS...SOME WITH VERY HEAVY RAIN ...FREQUENT LIGHTNING STRIKES...SMALL HAIL AND GUSTY WINDS EXTENDED FROM 60 MILES SOUTHWEST OF MINOT OR JUST SOUTHWEST OF WHITE SHIELD TO 15 MILES SOUTHWEST OF BISMARCK TO 35 MILES SOUTHWEST OF BISMARCK NEAR RALEIGH. THESE THUNDERSTORMS WERE MOVING EAST AT 25 MILES AN HOUR. IN ADDITION TO LAKE SAKAKAWEA SOME COMMUNITIES IN THE PATH OF THESE THUNDERSTORMS INCLUDE BISMARCK/MANDAN...HAZEN/BEULAH...WASHBURN...WILTON AND BREIEN. BE PREPARED TO MOVE TO A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES. JOBE
Special weather statement, Jul 6, 5:27 PM CDT, 3 hours 15 minutes before
NDZ001-070000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLISTON ND 525 PM CDT SAT JUL 6 1991 ...THUNDERSTORMS IN FAR NORTHWEST NORTH DAKOTA.... AT 515 PM CDT...NATIONAL WEATHER SERVICE RADAR IN WILLISTON INDICATED A THUNDERSTORM 53 MILES NORTH OF WILLISTON...CENTERED OVER AMBROSE NORTH DAKOTA. THIS THUNDERSTORM IS PRODUCING HEAVY RAIN..GUSTY WINDS AND DEADLY LIGHTNING STRIKES. MOVEMENT IS TO THE EAST SOUTHEAST AT 20 MPH. THIS THUNDERSTORM WILL PASS THROUGH CROSBY AND SOUTH OF NOONAN DURING THE NEXT 60 MINUTES. ALLARD
Special weather statement, Jul 6, 6:41 PM CDT, 2 hours 1 minute before
NDZ001-005-070100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLISTON ND 635 PM CDT SAT JUL 6 1991 ...THUNDERSTORMS OVER NORTHWEST NORTH DAKOTA.... AT 630 PM CDT...NATIONAL WEATHER SERVICE RADAR IN WILLISTON INDICATED A LINE OF THUNDERSTORMS 40 TO 65 MILES NORTHEAST OF WILLISTON..FROM POWERS LAKE TO PORTAL. THESE THUNDERSTORMS ARE PRODUCING HEAVY RAIN.. GUSTY WINDS AND DEADLY LIGHTENING STRIKES. SMALL HAIL IS ALSO POSSIBLE WITH THESE THUNDERSTORMS. THIS LINE OF THUNDERSTORMS IS MOVING TO THE SOUTHEAST AT 30 MPH. TAKE NECESSARY PRECAUTIONS AS THESE THUNDERSTORMS CAN PRODUCE DANGEROUS CONDITIONS VERY RAPIDLY. ALLARD
Special weather statement, Jul 6, 7:37 PM CDT, 1 hour 5 minutes before
NDZ005-070100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLISTON ND 735 PM CDT SAT JUL 6 1991 ...THUNDERSTORMS OVER NORTHWEST NORTH DAKOTA.... AT 730 PM CDT...NATIONAL WEATHER SERVICE RADAR IN WILLISTON INDICATED A THUNDERSTORM 55 MILES NORTHEAST OF WILLISTON..NORTH OF STANLEY NORTH DAKOTA. THIS THUNDERSTORM HAS PRODUCED HEAVY RAIN..GUSTY WINDS..DEADLY LIGHTENING STRIKES AND SMALL HAIL. THIS THUNDERSTORM IS MOVING TO THE SOUTHEASTc AT 30 MPH. TAKE NECESSARY PRECAUTIONS AS THESE THUNDERSTORMS CAN PRODUCE DANGEROUS CONDITIONS VERY RAPIDLY. ALLARD
Local storm report, Jul 6, 8:20 PM CDT, 22 minutes before
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</html>Special weather statement, Jul 6, 8:23 PM CDT, 19 minutes before
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<body>
<main class="wrap">
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<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
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The site you requested is temporarily down for maintenance or an unexpected outage.
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<p id="message2">
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</html>The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 7:28 PM CDT | Severe Thunderstorm Warning | BIS | Kidder, Logan | 62 min |
| Jul 6, 7:38 PM CDT | Tornado Warning | BIS | Logan | 37 min |
| Jul 6, 7:58 PM CDT | Severe Thunderstorm Warning | BIS | Rolette | 62 min |
| Jul 6, 7:58 PM CDT | Severe Thunderstorm Warning | BIS | Bottineau | 42 min |
| Jul 6, 8:36 PM CDT | Severe Thunderstorm Warning | BIS | Ward | 54 min |
| Jul 6, 9:17 PM CDT | Severe Thunderstorm Warning | BIS | McHenry | 43 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.