Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 212, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Sep 7, 1997, 11:50 PM CDT for Cass County, North Dakota; Clay County, Minnesota. It was in force for 40 min. 3 reports 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 7, 1997, 11:50 PM CDT (04:50 UTC)
- Expired
- Sep 8, 1997, 12:30 AM CDT
- In force
- 40 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
Counties Clay County, MN, Cass County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 77 km from the middle of the area, began a volume at 04:50 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 8, 12:05 AM CDT | Hail 0.75 | Fargo, ND | The hailstorm hit several car dealerships along Interstate 29 in Fargo, causing damage to numerous cars and trucks. |
| Sep 8, 12:14 AM CDT | Hail 1 | Moorhead, MN | |
| Sep 8, 12:25 AM CDT | Hail 0.75 | Fargo, ND |
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
Aberdeen, SD (KABR), launched 00:00Z, 4.8 hours before the alert went out and 253 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
- 1847 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 1152 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 7, 9:02 PM CDT, 2 hours 48 minutes earlier.
Area forecast discussion, Sep 7, 9:02 PM CDT, 2 hours 48 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 901 PM CDT SUN SEP 7 1997 FIRST PERIOD DISCUSSION...GENERAL TREND ON STRMS ON 88D HAS BEEN ON THE DCRS ESPECIALLY IN ERN ND. HOWEVER IR IMAGERY HAS SOME BUILDING TO THE SW. 88D VAD WND HAS RELATIVELY WK WNDS ALFT MAKING FOR PULSE STORMS. LOW LVL FLO ON VAD WND HAS INCRSD A BIT IN LAST HALF HOUR. ADAP CONTS TO SHOW SFC MOIST CNVG IN NRN CNTYS BUT LESS THAN EARLIER PLOTS. BEST INSTABLILITES REMAIN AHEAD OF CD FNT. WITH SFC HTG GONE XPCT STRMS TO CONT TO DROP BLO SVR LVLS. HOWEVER LLJ MAY KEEP THINGS ALIVE FOR A WHILE. HOPPES
In the hours before
Local storm report, Sep 7, 9:55 PM CDT, 1 hour 55 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED TIME IN LAST ENTRY
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
955 PM CDT SUN SEP 7 1997
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0619 PM 7 S HAMAR ND 0.75 INCH HAIL
09/07/97 EDDY
0815 PM 3.5 NE ARDOCH ND 1.75 INCH HAIL
09/07/97 WALSH
0925 PM THOMPSON ND 0.75 INCH HAIL
09/07/97 GRAND FORKS
BELLESLocal storm report, Sep 7, 9:56 PM CDT, 1 hour 54 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED TIME IN LAST ENTRY
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
955 PM CDT SUN SEP 7 1997
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0619 PM 7 S HAMAR ND 0.75 INCH HAIL
09/07/97 EDDY
0815 PM 3.5 NE ARDOCH ND 1.75 INCH HAIL
09/07/97 WALSH
0925 PM THOMPSON ND 0.75 INCH HAIL
09/
07/97 GRAND FORKS
BELLESThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 7:15 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 30 min |
| Sep 7, 7:47 PM CDT | Severe Thunderstorm Warning | FGF | Griggs | 28 min |
| Sep 7, 8:13 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 17 min |
| Sep 7, 9:07 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 38 min |
| Sep 7, 11:37 PM CDT | Severe Thunderstorm Warning | FGF | Cass | 38 min |
| Sep 8, 12:30 AM CDT | Severe Thunderstorm Warning | FGF | Cass | 30 min |
| Sep 8, 12:40 AM CDT | Severe Thunderstorm Warning | FGF | Richland | 35 min |
| Sep 8, 4:22 PM CDT | Severe Thunderstorm Warning | FGF | Richland | 38 min |
| Sep 7, 7:06 PM CDT | Severe Thunderstorm Warning | FGF | Roseau | 39 min |
| Sep 7, 7:34 PM CDT | Severe Thunderstorm Warning | FGF | Kittson | 26 min |
| Sep 7, 7:44 PM CDT | Severe Thunderstorm Warning | FGF | Roseau | 31 min |
| Sep 7, 8:32 PM CDT | Severe Thunderstorm Warning | FGF | Marshall | 28 min |
| Sep 7, 9:03 PM CDT | Severe Thunderstorm Warning | FGF | Marshall, Polk | 27 min |
| Sep 7, 9:29 PM CDT | Severe Thunderstorm Warning | FGF | Pennington, Polk | 31 min |
| Sep 7, 10:00 PM CDT | Severe Thunderstorm Warning | FGF | Polk | 30 min |
| Sep 7, 10:31 PM CDT | Severe Thunderstorm Warning | FGF | Norman, Polk | 29 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1997Severe 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.