Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 160, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 2, 1997, 10:27 PM CDT for Polk County, Minnesota; Grand Forks County, North Dakota. It was in force for 33 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 2, 1997, 10:27 PM CDT (03:27 UTC)
- Expired
- Aug 2, 1997, 11:00 PM CDT
- In force
- 33 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
Counties Polk County, MN, Grand Forks County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 46 km from the middle of the area, began a volume at 03:31 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 2, 10:41 PM CDT | Thunderstorm Wind | Thompson, ND | Power lines were blown down in the strong wind. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 2, 9:30 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 3.5 hours before the alert went out and 281 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
- 187 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 1946 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 71 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 KFAR 030327 RRA SVRFAR MNC119-NDC035-030400- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1027 PM CDT SAT AUG 2 1997 THE NATIONAL WEATHER SERVICE IN EASTERN ND/GRAND FORKS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1100 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTHWEST MINNESOTA ...WESTERN POLK COUNTY IN NORTHEAST NORTH DAKOTA ...EASTERN GRAND FORKS COUNTY AT 1025 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM LOCATED NEAR THE TOWN OF THOMPSON...OR 10 MILES SOUTH OF GRAND FORKS. THIS STORM WAS MOVING TO THE SOUTHEAST AT 30 MPH AND WILL BE AFFECTING THE TOWNS OF REYNOLDS...ELDRED...AND CpLIMAX. THIS STORM HAS PRODUCED WINDS TO OVER 60 MPH AND REMAINS DANGEROUS. IF YOU ARE IN THE PATH OF THIS STORM SEEK SHELTER IMMEDIATELY. STRAGER &
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 Aug 2, 8:56 PM CDT, 1 hour 31 minutes earlier.
Area forecast discussion, Aug 2, 8:56 PM CDT, 1 hour 31 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 855 PM CDT SAT AUG 02 1997 STAYING BUSY WITH SVR WX ATTM. WL LOOK OVER ZONES TO ENSURE ALL IS CURRENT...OTHERWISE NO MAJOR CHANGES EXPCTD FOR NOW. STRAGER
In the hours before
Local storm report, Aug 2, 7:15 PM CDT, 3 hours 12 minutes before
PRELIMINARY LOCAL STORM REPORT...DELAYED REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
715 PM CDT SAT AUG 2 1997
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
500 PM BRAMPTON ND DIME SIZE HAIL
08/02/97 SARGENT
540 PM 6N ELBOW LAKE MN DIME SIZE HAIL
08/02/97 GRANT
550 PM GWINNER ND PEA SIZE HAIL
08/02/97 SARGENT 50 MPH WIND
540-550 PM 7E ELBOW LAKE ND DIME SIZE HAIL
08/02/97 GRANT
605 PM BARRETT ND DIME SIZE HAIL
08/02/97 GRANT
605 PM 5N COGSWELL ND PEA TO GOLFBALL SIZE HAIL
08/02/97 SARGENT
606 PM 2E ELBOW LAKE MN DIME SIZE HAIL
08/02/97 GRANT
634 PM BARNEY ND DIME SIZE HAIL
08/02/97 RICHLAND
657 PM MOORETON TRUCK SCALE ND DIME SIZE HAIL 52 MPH WIND
08/02/97 RICHLAND
630 PM HOFFMAN MN DIME SIZE HAIL
08/02/97 GRANT STREET FLOODING
RALocal storm report, Aug 2, 7:16 PM CDT, 3 hours 11 minutes before
PRELIMINARY LOCAL STORM REPORT...DELAYED REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
715 PM CDT SAT AUG 2 1997
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
500 PM BRAMPTON ND DIME SIZE HAIL
08/02/97 SARGENT
540 PM 6N ELBOW LAKE MN DIME SIZE HAIL
08/02/97 GRANT
550 PM GWINNER ND PEA SIZE HAIL
08/02/97 SARGENT 50 MPH WIND
540-550 PM 7E ELBOW LAKE ND DIME SIZE HAIL
08/02/97 GRANT
605 PM BARRETT ND DIME SIZE HAIL
08/02/97 GRANT
605 PM 5N COGSWELL ND PEA TO GOLFBALL SIZE HAIL
08/02/97 SARGENT
606 PM 2E ELBOW LAKE MN DIME SIZE HAIL
08/02/97 GRANT
634 PM BARNEY ND DIME SIZE HAIL
08/02/97 RICHLAND
657 PM MOORETON TRUCK SCALE ND DIME SIZE HAIL 52 MPH WIND
08/02/97 RICHLAND
630 PM HOFFMAN MN DIME SIZE HAIL
08/02/97 GRANT STREET FLOODING
RALocal storm report, Aug 2, 7:48 PM CDT, 2 hours 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
748 PM CDT SAT AUG 2 1997
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
720 PM LITCHVILLE 1/2 N ND 2.00 TO 2.50 INCH HAIL
08/02/97 BARNES
728 PM KATHRYN 4E ND DIME SIZE HAIL
08/02/97 BARNES
735 PM FINGAL ND 0.5 INCH HAIL
08/02/97 BARNES
RALocal storm report, Aug 2, 8:15 PM CDT, 2 hours 12 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
815 PM CDT SAT AUG 2 1997
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
753 PM MUNICH ND WIND EST. 60-70 MPH
08/02/97 CAVALIER PEA TO MARBLE SIZE HAIL
VERY HEAVY RAIN
813 PM MAPLETON 3SE ND DIME SIZE HAIL 40 MPH WIND
08/02/97 CASS
RALocal storm report, Aug 2, 8:20 PM CDT, 2 hours 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
820 PM CDT SAT AUG 2 1997
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
818 PM DAZEY ND DIME SIZE HAIL
08/02/97 BARNES
822 PM FARGO 10W ND DIME SIZE HAIL 45+ MPH WIND
08/02/97 CASS
RALocal storm report, Aug 2, 8:25 PM CDT, 2 hours 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
820 PM CDT SAT AUG 2 1997
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION...d.
818 PM DAZEY ND DIME SIZE HAIL
08/02/97 BARNES
822 PM FARGO 10W ND DIME SIZE HAIL 45+ MPH WIND
08/02/97 CASS
RAThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 8:50 PM CDT | Severe Thunderstorm Warning | FGF | Clay | 40 min |
| Aug 2, 9:28 PM CDT | Severe Thunderstorm Warning | FGF | Becker | 47 min |
| Aug 2, 9:52 PM CDT | Tornado Warning | FGF | Polk | 38 min |
| Aug 3, 4:18 PM CDT | Severe Thunderstorm Warning | FGF | Polk | 27 min |
| Aug 3, 4:44 PM CDT | Severe Thunderstorm Warning | FGF | Polk | 31 min |
| Aug 3, 5:00 PM CDT | Severe Thunderstorm Warning | FGF | Clearwater | 45 min |
| Aug 3, 6:04 PM CDT | Severe Thunderstorm Warning | FGF | Polk | 41 min |
| Aug 3, 6:43 PM CDT | Severe Thunderstorm Warning | FGF | Hubbard | 47 min |
| Aug 2, 7:22 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 38 min |
| Aug 2, 7:57 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier | 33 min |
| Aug 2, 7:59 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 31 min |
| Aug 2, 8:09 PM CDT | Severe Thunderstorm Warning | FGF | Cass | 36 min |
| Aug 2, 8:31 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 29 min |
| Aug 2, 8:49 PM CDT | Tornado Warning | FGF | Walsh | 26 min |
| Aug 2, 9:08 PM CDT | Tornado Warning | FGF | Grand Forks, Nelson | 52 min |
| Aug 2, 9:42 PM CDT | Severe Thunderstorm Warning | FGF | Griggs | 33 min |
| Aug 2, 10:11 PM CDT | Severe Thunderstorm Warning | FGF | Steele | 34 min |
| Aug 2, 10:20 PM CDT | Severe Thunderstorm Warning | FGF | Traill | 25 min |
| Aug 3, 5:28 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 47 min |
| Aug 3, 5:44 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 31 min |
| Aug 3, 5:49 PM CDT | Severe Thunderstorm Warning | FGF | Towner | 41 min |
| Aug 3, 6:20 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 25 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 1997Severe 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.