Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 145, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Aug 29, 1997, 3:31 PM CDT for Logan County, North Dakota. It was in force for 44 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
- Aug 29, 1997, 3:31 PM CDT (20:31 UTC)
- Expired
- Aug 29, 1997, 4:15 PM CDT
- In force
- 44 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
County Logan County, ND
The radar
The Bismarck radar (KBIS), 104 km from the middle of the area, began a volume at 20:34 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 |
|---|---|---|---|
| Aug 29, 3:45 PM CDT | Thunderstorm Wind 65 | Napoleon, ND | thunderstorm winds blew down a chain link fence around the school. Also numerous trees fell in town with some falling across houses or automobiles. |
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.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 8.5 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
- 1638 J/kg
- Mixed-layer CIN
- -278 J/kg
- Mixed-layer LCL
- 1238 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 182 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBIS 292030 RRA SVRBIS NDC047-292115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BISMARCK ND 331 PM CDT FRI AUG 29 1997 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 ...LOGAN COUNTY AT 325 PM CDT WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES WEST OF BURNSTAD OR 55 SOUTHEAST OF BISMARCK. THE STORM IS MOVING EAST AT 20 MPH. TOWNS IN OR NEAR THE PATH OF THIS STORM INCLUDE BURNSTAD...FREDONIA AND GACKLE. 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. HINTZ/MANTHE
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, Aug 29, 12:25 PM CDT, 3 hours 6 minutes before
NDZ034-035-291830- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 1225 PM CDT FRI AUG 29 1997 ...HEAVY RAIN MOVING INTO THE BISMARCK/MANDAN AREA... AT 1215 PM CDT WEATHER RADAR INDICATED A LINE OF THUNDERSTORMS MOVING INTO CENTRAL NORTH DAKOTA. THIS LINE EXTENDED FROM 20 MILES NORTH OF BISMARCK NEAR THE TOWN OF REGAN TO 20 MILES SOUTHWEST OF BISMARCK. THE LINE IS MOVING NORTHEAST AT 35 MPH. EARLIER THE MANDAN AIRPORT REPORTED VERY HEAVY RAIN WITH THE THUNDERSTORMS. PERSONS IN THE TOWNS OF BISMARCK...MANDAN...REGAN AND BALDWIN CAN EXPECTED THE LINE TO MOVE THROUGH THEIR AREAS BY 130 PM CDT. ALTHOUGH NO SEVERE WEATHER IS ANTICIPATED...VERY HEAVY RAIN MAY CAUSE SOME PONDING OF WATER ON THE ROADWAY. CONTINUE TO MONITOR YOUR LOCAL TV...RADIO OR NOAA WEATHER RADIO FOR FURTHER STATEMENTS AND UPDATES. HINTZ
Special weather statement, Aug 29, 12:27 PM CDT, 3 hours 4 minutes before
NDZ034-035-291830- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 1225 PM CDT FRI AUG 29 1997 ...HEAVY RAIN MOVING INTO THE BISMARCK/MANDAN AREA... AT 1215 PM CDT WEATHER RADAR INDICATED A LINE OF THUNDERSTORMS MOVING INTO CENTRAL NORTH DAKOTA. THIS LINE EXTENDED FROM 20 MILES NORTH OF BISMARCK NEAR THE TOWN OF REGAN TO 20 MILES SOUTHWEST OF BISMARCK. THE LINE IS MOVING NORTHEAST AT 35 MPH. EARLIER THE MANDAN AIRPORT REPORTED VERY HEAVY RAIN WITH THE THUNDERSTORMS. PERSONS IN THE TOWNS OF BISMARCK...MANDAN...REGAN AND BALDWIN CAN EXPECTED THE LINE TO MOVE THROUGH THEIR AREAS BY 130 PM CDT. ALTHOUGH NO SEVERE WEATHER IS ANTICIPATED...VERY HEAVY RAIN MAY CAUSE SOME& PONDING OF WATER ON THE ROADWAY. CONTINUE TO MONITOR YOUR LOCAL TV...RADIO OR NOAA WEATHER RADIO FOR FURTHER STATEMENTS AND UPDATES. HINTZ
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 1:40 PM CDT | Severe Thunderstorm Warning | BIS | Burleigh, Kidder | 65 min |
| Aug 29, 4:37 PM CDT | Severe Thunderstorm Warning | BIS | Dickey | 53 min |
| Aug 29, 5:33 PM CDT | Severe Thunderstorm Warning | BIS | Dickey | 27 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1997Every severe thunderstorm warning in 1997
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; radar from the NEXRAD Level II archive.