Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 196, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Sep 1, 1997, 3:04 AM CDT for Becker County, Minnesota. It was in force for 41 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
- Sep 1, 1997, 3:04 AM CDT (08:04 UTC)
- Expired
- Sep 1, 1997, 3:45 AM CDT
- In force
- 41 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Becker County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 141 km from the middle of the area, began a volume at 08:03 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 |
|---|---|---|---|
| Sep 1, 3:20 AM CDT | Hail 0.75 | Lake Park, MN |
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
International Fa, MN (KINL), launched 00:00Z, 8.1 hours before the alert went out and 254 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
- 539 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 1654 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 171 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
558 WUUS1 KFAR 010805 RRA SVRFAR MNC005-010845- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 304 AM CDT MON SEP 1 1997 THE NATIONAL WEATHER SERVICE IN EASTERN ND/GRAND FORKS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 345 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN WEST CENTRAL MINNESOTA ...WESTERN BECKER COUNTY AT 304 AM...RADAR INDICATED A SEVERE THUNDERSTORM 6 MILES EAST OF HAWLEY OR 20 MILES WEST OF DETROIT LAKES. THIS STORM IS MOVING TO THE EAST AT 30 MPH AND WILL BE EFFECTING THE TOWNS OF LAKE PARK AND AUDUBON. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. GSF
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.
NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 1, 3:01 AM CDT, 3 minutes earlier.
Area forecast discussion, Sep 1, 3:01 AM CDT, 3 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 300 AM CDT MON SEP 01 1997 UNABLE TO PROVIDE A FULL DISCUSSION DUE TO SVR WX...WIND ADVISORY AND FLASH FLOODING IN CWFA. MESO-HIGH CONTINUES TO MOVE ACROSS NW MN PRODUCING 30 TO 55 MPH WIND GUSTS AND SOME TREES DOWN FROM THE WINDS. HAVE HAD ONE REPORT OF 60 MPH WIND...BUT RECOMMEND KEEPING ADVISORY GOING AND NOT UPGRADE TO HIGH WIND WARNING AT THIS TIME AS MESO-HIGH APPEARS TO BE WEAKENING SLIGHTLY AND STARTING TO MOVE E. MODELS BRING COLD FRONT ACROSS CWFA TODAY AND STRONG CAA WILL INTERACT WITH MID 50 TO MID 60 DEWPOINT TO PRODUCE MORE THUNDERSTORM ACTIVITY. WITH 850 MB `TEMPS CRASHING DOWN BEHIND FRONT...EXPECT HIGH TEMPS TODAY IN THE 70S. NG
In the hours before
Special weather statement, Aug 31, 10:20 PM CDT, 4 hours 44 minutes before
NDZ006>008-014>016-024-026>030-038-039-049-052-053-010415- SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1016 PM CDT SUN AUG 31 1997 ...TORNADO WATCH ALLOWED TO EXPIRE FOR EASTERN NORTH DAKOTA... THE TORNADO WATCH THAT WAS IN EFFECT FOR EASTERN NORTH DAKOTA HAS BEEN ALLOWED TO EXPIRE. A WARM FRONT EXTENDING FROM BISMARCK TO JAMESTOWN TO FARGO WILL CONTINUE TO PROVIDE THE FOCUS FOR THUNDERSTORM DEVELOPMENT OVERNIGHT. AS THE STORMS MOVE EAST ALONG THE WARM FRONT...ISOLATED OCCURRANCES OF LARGE HAIL...DAMAGING WINDS AND TORNADOS REMAIN POSSIBLE. VERY HEAVY RAINFALL CAN ALSO BE EXPECTED FROM THESE STORMS. NG
Special weather statement, Aug 31, 10:45 PM CDT, 4 hours 19 minutes before
MNZ001-002-013>015-022-NDZ027-029-030-010645- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1045 PM CDT SUN AUG 31 1997 ...GUSTY WINDS EXPECTED TO CONTINUE OVER PARTS OF NORTHEASTERN NORTH DAKOTA AND NORTHWESTERN MINNESOTA... SOUTHERLY WINDS WILL CONTINUE TO GUST FROM 35 TO 50 MPH OVER GRAND FORKS...POLK...RED LAKE...PENNINGTON...STEELE...TRAILL...NORMAN AND MAHNOMEN COUNTIES UNTIL 130 AM CDT. ATMOSPHERIC CONDITIONS HAVE PRODUCED A LOCALIZED STRONG PRESSURE GRADIENT THAT IS CONTRIBUTING TO THE DEVELOPMENT OF THESE STRONG SOUTHERLY WINDS. THIS PRESSURE GRADIENT IS EXPECTED TO WEAKEN AFTER 1 AM CDT AND THE WINDS SHOULD BEGIN TO WEAKEN. NG
Special weather statement, Aug 31, 10:46 PM CDT, 4 hours 18 minutes before
MNZ001-002-013>015-022-NDZ027-029-030-010645- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1045 PM CDT SUN AUG 31 1997 ...GUSTY WINDS EXPECTED TO CONTINUE OVER PARTS OF NORTHEASTERN NORTH DAKOTA AND NORTHWESTERN MINNESOTA. SOUTHERLY WINDS WILL CONTINUE TO GUST FROM 35 TO 50 MPH OVER GRAND FORKS...POLK...RED LAKE...PENNINGTON...STEELE...TRAILL...NORMAN AND MAHNOMEN COUNTIES UNTIL 130 AM CDT. ATMOSPHERIC CONDITIONSd HAVE PRODUCED A LOCALIZED STRONG PRESSURE GRADIENT THAT IS CONTRIBUTING TO THE DEVELOPMENT OF THESE STRONG SOUTHERLY WINDS. THIS PRESSURE GRADIENT IS EXPECTED TO WEAKEN AFTER 1 AM CDT AND THE WINDS SHOULD BEGIN TO WEAKEN. NG
Special weather statement, Aug 31, 10:47 PM CDT, 4 hours 17 minutes before
MNZ001-002-013>015-022-NDZ027-029-030-010645- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1045 PM CDT SUN AUG 31 1997 ...GUSTY WINDS EXPECTED TO CONTINUE OVER PARTS OF NORTHEASTERN NORTH DAKOTA AND NORTHWESTERN MINNESOTA... SOUTHERLY WINDS WILL CONTINUE TO GUST FROM 35 TO 50 MPH OVER GRAND FORKS...POLK...RED LAKE...PENNINGTON...STEELE...TRAILL...NORMAN AND MAHNOMEN COUNTIES UNTIL 130 AM CDT. ATMOSPHERIC CONDITIOfNS HAVE PRODUCED A LOCALIZED STRONG PRESSURE GRADIENT THAT IS CONTRIBUTING TO THE DEVELOPMENT OF THESE STRONG SOUTHERLY WINDS. THIS PRESSURE GRADIENT IS EXPECTED TO WEAKEN AFTER 1 AM CDT AND THE WINDS SHOULD BEGIN TO WEAKEN. NG
Special weather statement, Sep 1, 12:06 AM CDT, 2 hours 58 minutes before
MNZ001-002-013>017-022>024-NDZ027-029-030-010700- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1206 AM CDT MON SEP 1 1997 ...GUSTY WINDS EXPECTED TO CONTINUE OVER PARTS OF NORTHEASTERN NORTH DAKOTA AND NORTHWESTERN MINNESOTA. SOUTHERLY WINDS WILL CONTINUE TO GUST FROM 35 TO 50 MPH OVER GRAND FORKS...POLK...RED LAKE...PENNINGTON...STEELE...TRAILL...NORMAN... MAHNOMEN...CLEARWATER...HUBBARD AND SOUTHERN BELTRAMI COUNTIES UNTIL 130 AM CDT. ATMOSPHERIC CONDITIONS HAVE PRODUCED A LOCALIZED STRONG PRESSURE GRADIENT THAT IS CONTRIBUTING TO THE DEVELOPMENT OF THESE STRONG SOUTHERLY WINDS. THIS PRESSURE GRADIENT IS EXPECTED TO WEAKEN AFTER 1 AM CDT IN EASTERN NORTH DAKOTA AND THEN WINDS SHOULD SLOWLY BEGIN TO WEAKEN. NG
Special weather statement, Sep 1, 12:07 AM CDT, 2 hours 57 minutes before
MNZ001-002-013>017-022>024-NDZ027-029-030-010700- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1206 AM CDT MON SEP 1 1997 ...GUSTY WINDS EXPECTED TO CONTINUE OVER PARTS OF NORTHEASTERN NORTH DAKOTA AND NORTHWESTERN MINNESOTA. SOUTHERLY WINDS WILL CONTINUE TO GUST FROM 35 TO 50 MPH OVER GRAND FORKS...POLK...RED LAKE...PENNINGTON...STEELE...TRAILL...NORMAN... MAHNOMEN...CLEARWATER...HUBBARD AND SOUTHERN BELTRAMI COUNTIES UNTIL 130 AM CDT. ATMOSPHERIC CONDITIONS HAVE PRODUCED A LOCALIZED STRONG PRESSURE GRADIENT THAT IS CONTRIBUTING TO THE DEVELOPMENT OF THESE STRONG SOUTHERLY WINDS. THIS PRESSURE GRADIENT IS EXPECTED TO WEAKEN AFTER 1 AM CDT IN EASTERN NORT|H DAKOTA AND THEN WINDS SHOULD SLOWLY BEGIN TO WEAKEN. NG
Nearby
Severe Thunderstorm Warnings in Minnesota, 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.