Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 235, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 26, 1998, 9:17 PM CDT for Marshall County, Minnesota; Walsh County, North Dakota. It was in force for 33 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, 9:17 PM CDT (02:17 UTC)
- Expired
- Aug 26, 1998, 9:50 PM CDT
- In force
- 33 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 02:19 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, 2.3 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
As transmitted, in the capitals the NWS used until 2016.
441 WUUS1 KFAR 270219 RRA SVRFAR MNC089-NDC099-270250- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 917 PM CDT WED AUG 26 1998 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN MARSHALL COUNTY IN NORTHWESTERN MINNESOTA EASTERN WALSH COUNTY IN NORTHEASTERN NORTH DAKOTA * UNTIL 950 PM CDT * AT 918 PM CDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM 5 MILES NORTHWEST OF OSLO...OR 20 MILES SOUTHEAST OF GRAFTON. MOVEMENT WAS TOWARDS THE SOUTHEAST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... OSLO AT 935 PM CDT DURING THUNDERSTORMS YOU SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES. KELLENBENZ
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, 9:00 PM CDT, 17 minutes earlier.
Area forecast discussion, Aug 26, 9:00 PM CDT, 17 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 900 PM CDT WED AUG 26 1998 FIRST PERIOD DISCUSSION...88D SHOWG STRMS REDEVELOPING OVR CAVALIER AND PEMBINA CNTYS. CURRENT STRM TURNING TO THE RIGHT. STRMS FIRING ALNG A WK BNDRY THAT EXTENDS ACRS PEMBINA AND CAVALIER CNTYS WHERE ADAP HAS BEEN INDICATING SFC MOIST FLUX CONVERGENCE THRU THE EVE. OTHER AREA WAS IN CNTRL AND WRN SD. LIS REMAIN THE LOWEST ACRS THE DAKOTAS. 88D SHOWING TSTRMS IN NRN CNTYS MAY BE WEAKENING SLIGHTLY. WL HAVE TO WATCH FOR STRMS IN SD TO MOV INTO SRN CNTYS LATER TNGT. GRIDDED DATA SHOWS CAPES TO REMAIN HI OVNGT. BUSY NIGHT WITH SHORT DISC. HOPPES
In the hours before
Local storm report, Aug 26, 7:34 PM CDT, 1 hour 43 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 43 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, 47 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, 47 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, 34 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, 34 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, 8:48 PM CDT | Severe Thunderstorm Warning | FGF | Marshall | 32 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.