Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 234, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 26, 1998, 8:48 PM CDT for Marshall County, Minnesota; Walsh County, North Dakota. It was in force for 32 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
- Aug 26, 1998, 8:48 PM CDT (01:48 UTC)
- Expired
- Aug 26, 1998, 9:20 PM CDT
- In force
- 32 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
Counties Marshall County, MN, Walsh County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 95 km from the middle of the area, began a volume at 01:51 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
International Fa, MN (KINL), launched 00:00Z, 1.8 hours before the alert went out and 277 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
- 92 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 2235 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 Aug 26, 2:30 PM CDT, 6 hours 18 minutes earlier.
Area forecast discussion, Aug 26, 2:30 PM CDT, 6 hours 18 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 230 PM CDT WED AUG 26 1998 VERY UNSTABLE ATMOSPHERE ACROSS THE REGION. WK SFC BOUNDARY REMAINS EVIDENT IN WIND FIELD ALONG CANADIAN BORDER. SVR TSTMS IN TOWNER CO HAVE DISSIPATED...BUT STARTING TO SEE NEW AREA OF TSTMS INTENSIFYING JUST NORTH OF THE INTERNATIONAL BORDER....NORTH OF TOWER CO. THIS AREA MAY WELL GO SVR TOO AND MOVE ESE AND AFFECT FAR NRN TIER OF COUNTIES OVER NEXT FEW HOURS. NGM FWC MOS REALLY UNDERESTIMATED DEW PT TEMPS. ETA 1000MB DEW PTS LOOK BETTER. DPT UP TO 67 AT JMS/BIS AND MID 60S OVER REST OF THE CWFA. ROX AWOS DEW PT OF AROUND 70 READING TOO HIGH. NONETHELESS WITH TEMPS WELL INTO THE 80S TO AROUND 90...MODIFIED CAPES ARE AROUND 3000. WITH 500 MB ONLY WARMING SLIGHTLY TONIGHT AND WITH 850 MB TEMPS WARMING A FEW DEGREES...STILL EXPECT ATMOSPHERE TO REMAIN UNSTABLE THROUGH THE NIGHT. NO REAL TRIGGER FOR ORGANIZED CONVECTION....BUT SFC BOUNDARIES PERSIST AND ETA CAPES REMAIN AOA 1000 THRU THE NIGHT WITH SHOWALTER LI -4 RANGE. BEST CHC OF STORMS WILL BE WEST OF A FARGO TO BEMIDJI LINE. WET BULB ZERO IS LOWER TODAY THAN PAST DAYS MAKING HAILERS MORE LIKELY. GOT ONE INCH HAIL WITH VILS IN MID 50S. MAIN FOCUS OVERNIGHT WILL LIKELY SHIFT WEST INTO WRN 1/2 ND ALONG TROF/50H VORT LOBE MOVING IN FROM THE WEST. PRESENT ZFP FOR ERN ND HAS PSBL SVR WORDING TONIGHT ALREADY. BECAUSE OF POSSIBLE ONGOING SVR ACTIVITY THIS EVENING WILL SUGGEST TO KEEP MENTION OF PSBL SVR IN ZONES TONIGHT FOR GFK/DVL ZONES. FARGO AREA MORE DIFFICULT...BUT THINGS MAY GET ACTIVE THERE BEFORE 12Z AND SINCE THE WORDING IS IN THERE SUGGEST LEAVING SVR IN AS WELL. WILL SEND ZONE SUGGESTIONS AS ADMFAR BY 3 PM. RIDDLE
In the hours before
Local storm report, Aug 26, 7:34 PM CDT, 1 hour 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
734 PM CDT WED AUG 26 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0630 PM 6 S WALHALLA ND 1 INCH HAIL
08/26/98 PEMBINA LASTED 25
MINUTES
0650 PM 4 W HENSEL ND TORNADO
08/26/98 PEMBINA REPORTED BY PEMBINA COUNTY
SHERIFF OFFICE
0706 PM 10 W CAVALIER ND 1.75 INCH HAIL
08/26/98 PEMBINA
0720 PM 4 W CAVALIER ND .75 INCH HAIL
08/26/98 PEMBINA
BRAZZELLLocal storm report, Aug 26, 7:34 PM CDT, 1 hour 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
734 PM CDT WED AUG 26 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0630 PM 6 S WALHALLA ND 1 INCH HAIL
08/26/98 PEMBINA LASTED 25
MINUTES
0650 PM 4 W HENSEL ND TORNADO
08/26/98 PEMBINA REPORTED BY PEMBINA COUNTY
SHERIFF OFFICE
0706 PM 10 W CAVALIER ND 1.75 INCH HAIL
08/26/98 PEMBINA
0720 PM 4 W CAVALIER ND .75 INCH HAIL
08/26/98 PEMBINA
BRAZZELLLocal storm report, Aug 26, 8:30 PM CDT, 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
830 PM CDT WED AUG 26 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0725 PM CRYSTAL ND 1.25 INCH HAIL
08/26/98 PEMBINA
0735 PM CAVALIER ND 1.25 INCH HAIL
08/26/98 PEMBINA
BRAZZELLLocal storm report, Aug 26, 8:30 PM CDT, 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
830 PM CDT WED AUG 26 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0725 PM CRYSTAL ND 1.25 INCH HAIL
08/26/98 PEMBINA
0735 PM CAVALIER ND 1.25 INCH HAIL
08/26/98 PEMBINA
BRAZZELLLocal storm report, Aug 26, 8:43 PM CDT, 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
843 PM CDT WED AUG 26 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0706 PM 10 W CAVALIER ND 1.75 INCH HAIL
08/26/98 PEMBINA
0715 PM AKRA ND 1 INCH HAIL
08/26/98 PEMBINA
0720 PM 4 W CAVALIER ND .75 INCH HAIL
08/26/98 PEMBINA
0720 PM 1 E CAVALIER ND 1.5 INCH HAIL
08/26/98 PEMBINA
0755 PM ST THOMAS ND 2 INCH HAIL
08/26/98 PEMBINA
0805 PM 10 N GRAFTON ND 50 MPH TSTM GUST
08/26/98 PEMBINA
0805 PM 10 N GRAFTON ND 1.75 INCH HAIL
08/26/98 PEMBINA
0843 PM 5 NE GRAFTON ND 1.75 INCH HAIL
08/26/98 WALSH
BRAZZELLLocal storm report, Aug 26, 8:43 PM CDT, 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
843 PM CDT WED AUG 26 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0706 PM 10 W CAVALIER ND 1.75 INCH HAIL
08/26/98 PEMBINA
0715 PM AKRA ND 1 INCH HAIL
08/26/98 PEMBINA
0720 PM 4 W CAVALIER ND .75 INCH HAIL
08/26/98 PEMBINA
0720 PM 1 E CAVALIER ND 1.5 INCH HAIL
08/26/98 PEMBINA
0755 PM ST THOMAS ND 2 INCH HAIL
08/26/98 PEMBINA
0805 PM 10 N GRAFTON ND 50 MPH TSTM GUST
08/26/98 PEMBINA
0805 PM 10 N GRAFTON ND 1.75 INCH HAIL
08/26/98 PEMBINA
0843 PM 5 NE GRAFTON ND 1.75 INCH HAIL
08/26/98 WALSH
BRAZZELLThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 9:17 PM CDT | Severe Thunderstorm Warning | FGF | Marshall | 33 min |
| Aug 26, 7:05 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 35 min |
| Aug 26, 7:36 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 34 min |
| Aug 26, 7:49 PM CDT | Tornado Warning | FGF | Pembina, Walsh | 31 min |
| Aug 26, 8:17 PM CDT | Tornado Warning | FGF | Pembina, Walsh | 33 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 1998Severe Thunderstorm Warnings in North Dakota, 1998Every severe thunderstorm warning in 1998
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.