Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 89, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Jul 11, 1997, 9:46 PM CDT for Bottineau County, Rolette County, North Dakota. It was in force for 29 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 11, 1997, 9:46 PM CDT (02:46 UTC)
- Expired
- Jul 11, 1997, 10:15 PM CDT
- In force
- 29 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
Counties Bottineau County, ND, Rolette County, ND
The radar
The Minot AFB radar (KMBX), 58 km from the middle of the area, began a volume at 02:49 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 |
|---|---|---|---|
| Jul 11, 10:00 PM CDT | Thunderstorm Wind 60 | Dunseith, ND | Winds occurred 9 N of Dunseith near the port of entry. Numerous trees downed. |
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 00:00Z, 2.8 hours before the alert went out and 225 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
- 3242 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1128 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- -54 m²/s²
- 0-3 km storm-relative helicity
- -67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBIS 120246 RRA SVRBIS NDC009-079-120315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BISMARCK ND 946 PM CDT FRI JUL 11 1997 THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTH CENTRAL NORTH DAKOTA ...EASTERN BOTTINEAU COUNTY...WESTERN ROLETTE COUNTY AT 945 PM CDT DOPPLER WEATHER RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES EAST OF BOTTINEAU MOVING NORTH NORTHEAST AT 25 MPH. THIS STORM PRODUCED 60 MPH WINDS IN THE BOTTINEAU AREA. TOWNS NEAR THE PATH OF THIS STORM INCLUDE DUNSEITH AND SAN HAVEN. THE TORNADO WARNING FOR CENTRAL BOTTINEAU COUNTY AND THE SEVERE THUNDERSTORM WARNING FOR RENVILLE COUNTY HAVE BEEN ALLOWED TO EXPIRE. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEAT0HER CONDITIONS. & LEBLANG
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, 5 hours 47 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, 5 hours 46 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 11, 7:25 PM CDT | Severe Thunderstorm Warning | BIS | Bottineau, Renville | 65 min |
| Jul 11, 8:34 PM CDT | Severe Thunderstorm Warning | BIS | Bottineau, McHenry, Renville | 56 min |
| Jul 11, 8:56 PM CDT | Tornado Warning | BIS | Bottineau | 49 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.