Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 86, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Jul 11, 1997, 6:23 PM CDT for McLean County, Oliver County, North Dakota. It was in force for 67 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 11, 1997, 6:23 PM CDT (23:23 UTC)
- Expired
- Jul 11, 1997, 7:30 PM CDT
- In force
- 67 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
Counties McLean County, ND, Oliver County, ND
The radar
The Bismarck radar (KBIS), 79 km from the middle of the area, began a volume at 23:23 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.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 11.4 hours before the alert went out and 81 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
- 2169 J/kg
- Mixed-layer CIN
- -170 J/kg
- Mixed-layer LCL
- 556 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 220 m²/s²
- 0-3 km storm-relative helicity
- 252 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBIS 112322 RRA SVRBIS NDC055-065-120030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BISMARCK ND 623 PM CDT FRI JUL 11 1997 THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 730 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN CENTRAL NORTH DAKOTA ...MCLEAN COUNTY...EASTERN OLIVER COUNTY AT 615 PM CDT RADAR INDICATED A CLUSTER OF SEVERE THUNDERSTORMS THAT EXTENDS FROM 40 MILES NORTHWEST OF BISMARCK TO 60 MILES NORTH OF BISMARCK NEAR WASHBURN. THESE STORMS ARE MOVING NORTHWEST AT 15 MPH. WASHBURN...HENSLER AND UNDERWOOD ARE IN THE VICINITY OF THESE STORMS. ANOTHER SEVERE THUNDERSTORM WAS 55 MILES NORTHWEST OF BISMARCK NEAR PICK CITY. THIS STORM IS MOVING NORTH AT 15 MPH. PERSONS IN GARRISON ARE IN THE VICINTY OF THIS STORM. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS. HINTZ/NOAH
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 11, 3:59 PM CDT, 2 hours 24 minutes before
NDZ001>053-MNZ001>003-120300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 400 PM CDT FRI JUL 11 1997 ...SEVERE WEATHER AND HEAVY RAIN POSSIBLE TONIGHT... A HIGHLY UNSTABLE AND MOIST ATMOSPHERE WILL REMAIN IN PLACE OVER THE DAKOTAS TONIGHT. A SLOW MOVING COLD FRONT WILL TRIGGER SCATTERED SHOWERS AND THUNDERSTORMS IN WESTERN AND CENTRAL NORTH DAKOTA THIS EVENING...WHICH WILL MOVE INTO EASTERN PARTS OF THE STATE LATER TONIGHT. SOME OF THE STORMS THAT DO DEVELOP MAY CONTAIN LARGE HAIL AND DAMAGING WIND. HEAVY RAIN IS ALSO POSSIBLE. LOCALIZED FLOODING OF URBAN AREAS AND SMALL STREAMS IS POSSIBLE. AS THE STORMS BEGIN TO DEVELOP...CONTINUE TO MONITOR THIS STATION FOR FUTURLE FORECASTS AND POSSIBLE WARNINGS. NOAH
Special weather statement, Jul 11, 4:00 PM CDT, 2 hours 23 minutes before
NDZ001>053-MNZ001>003-120300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 400 PM CDT FRI JUL 11 1997 ...SEVERE WEATHER AND HEAVY RAIN POSSIBLE TONIGHT... A HIGHLY UNSTABLE AND MOIST ATMOSPHERE WILL REMAIN IN PLACE OVER THE DAKOTAS TONIGHT. A SLOW MOVING COLD FRONT WILL TRIGGER SCATTERED SHOWERS AND THUNDERSTORMS IN WESTERN AND CENTRAL NORTH DAKOTA THIS EVENING...WHICH WILL MOVE INTO EASTERN PARTS OF THE STATE LATER TONIGHT. SOME OF THE STORMS THAT DO DEVELOP MAY CONTAIN LARGE HAIL AND DAMAGING WIND. HEAVY RAIN IS ALSO POSSIBLE. LOCALIZED FLOODING OF URBAN AREAS AND SMALL STREAMS IS POSSIBLE. AS THE STORMS BEGIN TO DEVELOP...CONTINUE TO MONITOR THIS STATION FOR FUTURE FORECASTS AND POSSIBLE WARNINGS. NOAH
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 7:11 PM CDT | Severe Thunderstorm Warning | BIS | Dunn | 64 min |
| Jul 10, 7:45 PM CDT | Severe Thunderstorm Warning | BIS | Burke, Mountrail | 60 min |
| Jul 10, 8:00 PM CDT | Severe Thunderstorm Warning | BIS | McLean, Mercer | 60 min |
| Jul 10, 8:25 PM CDT | Severe Thunderstorm Warning | BIS | Grant, Sioux | 65 min |
| Jul 10, 8:41 PM CDT | Tornado Warning | BIS | Mercer | 34 min |
| Jul 10, 8:51 PM CDT | Severe Thunderstorm Warning | BIS | Morton | 54 min |
| Jul 10, 8:52 PM CDT | Severe Thunderstorm Warning | BIS | Mountrail, Ward | 68 min |
| Jul 10, 9:09 PM CDT | Severe Thunderstorm Warning | BIS | Bottineau, Renville | 66 min |
| Jul 10, 9:15 PM CDT | Tornado Warning | BIS | Ward | 30 min |
| Jul 10, 9:25 PM CDT | Severe Thunderstorm Warning | BIS | Burleigh, Morton | 65 min |
| Jul 10, 9:49 PM CDT | Severe Thunderstorm Warning | BIS | Bottineau, McHenry | 56 min |
| Jul 10, 9:51 PM CDT | Severe Thunderstorm Warning | BIS | McLean, Mercer | 69 min |
| Jul 10, 9:57 PM CDT | Tornado Warning | BIS | McHenry | 33 min |
| Jul 10, 10:10 PM CDT | Severe Thunderstorm Warning | BIS | Sioux | 50 min |
| Jul 10, 10:50 PM CDT | Severe Thunderstorm Warning | BIS | McHenry, Pierce | 40 min |
| Jul 10, 10:50 PM CDT | Severe Thunderstorm Warning | BIS | Emmons | 40 min |
| Jul 10, 11:29 PM CDT | Severe Thunderstorm Warning | BIS | Pierce, Rolette | 46 min |
| Jul 11, 12:01 AM CDT | Severe Thunderstorm Warning | BIS | Stutsman | 44 min |
| Jul 11, 4:31 PM CDT | Severe Thunderstorm Warning | BIS | Renville, Ward | 44 min |
| Jul 11, 4:54 PM CDT | Severe Thunderstorm Warning | BIS | Burke | 66 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.