Alert archive / North Dakota / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 227, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 26, 1998, 3:53 PM CDT for Cavalier County, North Dakota. It was in force for 32 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 26, 1998, 3:53 PM CDT (20:53 UTC)
- Expired
- Aug 26, 1998, 4:25 PM CDT
- In force
- 32 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Cavalier County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 162 km from the middle of the area, began a volume at 20:52 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 26, 4:00 PM CDT | Hail 0.75 | Maida, 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
Bismarck Municip, ND (KBIS), launched 12:00Z, 8.9 hours before the alert went out and 278 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
- 611 J/kg
- Mixed-layer CIN
- -194 J/kg
- Mixed-layer LCL
- 1615 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 133 m²/s²
- 0-3 km storm-relative helicity
- 161 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
477 WUUS1 KFAR 262054 RRA SVRFAR NDC019-262125- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 353 PM CDT WED AUG 26 1998 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN CAVALIER COUNTY IN NORTHEASTERN NORTH DAKOTA * UNTIL 425 PM CDT * AT 352 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES NORTHWEST OF MOUNT CARMEL OR 20 MILES NORTH LANGDON. MOVEMENT WAS EAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... MAIDA AT 400 PM CDT DURING THUNDERSTORMS YOU SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES.
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, 1 hour 23 minutes earlier.
Area forecast discussion, Aug 26, 2:30 PM CDT, 1 hour 23 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
Special weather statement, Aug 26, 12:40 PM CDT, 3 hours 13 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052-053-262100- HAZARDOUS WEATHER OUTLOOK ...UPDATED NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 1240 PM CDT WED AUG 26 1998 ...WIDELY SCATTERED SEVERE THUNDERSTORMS ACROSS NORTHEAST NORTH DAKOTA AND NORTHWEST MINNESOTA THIS AFTERNOON AND EVENING... ...SCATTERED SEVERE THUNDERSTORMS POSSIBLE ONCE AGAIN OVERNIGHT... A WEAK TROUGH OF LOW PRESSURE WAS LOCATED ALONG THE CANADIAN BORDER THIS AFTERNOON. THE ATMOSPHERE IS VERY UNSTABLE ACROSS THE REGION AND THIS BOUNDARY WILL ACT TO FOCUS SCATTERED SEVERE THUNDERSTORMS THIS AFTERNOON AND EARLY EVENING FROM NEAR DEVILS LAKE AND CANDO EAST TO THE ROSEAU AREA. LARGE HAIL WILL BE THE MAIN THREAT. OVERNIGHT...A COLD FRONT WILL MOVE INTO THE WESTERN DAKOTAS. THIS WILL HELP DEVELOP SCATTERED THUNDERSTORMS...SOME SEVERE...OVER CENTRAL AND WESTERN NORTH DAKOTA EARLY TONIGHT. THESE STORMS WILL MOVE INTO EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA OVERNIGHT AND EARLY THURSDAY MORNING. RIDDLE
Special weather statement, Aug 26, 12:40 PM CDT, 3 hours 13 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052-053-262100- HAZARDOUS WEATHER OUTLOOK ...UPDATED NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 1240 PM CDT WED AUG 26 1998 ...WIDELY SCATTERED SEVERE THUNDERSTORMS ACROSS NORTHEAST NORTH DAKOTA AND NORTHWEST MINNESOTA THIS AFTERNOON AND EVENING... ...SCATTERED SEVERE THUNDERSTORMS POSSIBLE ONCE AGAIN OVERNIGHT... A WEAK TROUGH OF LOW PRESSURE WAS LOCATED ALONG THE CANADIAN BORDER THIS AFTERNOON. THE ATMOSPHERE IS VERY UNSTABLE ACROSS THE REGION AND THIS BOUNDARY WILL ACT TO FOCUS SCATTERED SEVERE THUNDERSTORMS THIS AFTERNOON AND EARLY EVENING FROM NEAR DEVILS LAKE AND CANDO EAST TO THE ROSEAU AREA. LARGE HAIL WILL BE THE MAIN THREAT. OVERNIGHT...A COLD FRONT WILL MOVE INTO THE WESTERN DAKOTAS. THIS WILL HELP DEVELOP SCATTERED THUNDERSTORMS...SOME SEVERE...OVER CENTRAL AND WESTERN NORTH DAKOTA EARLY TONIGHT. THESE STORMS WILL MOVE INTO EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA OVERNIGHT AND EARLY THURSDAY MORNING. RIDDLE
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 12:10 PM CDT | Severe Thunderstorm Warning | FGF | Towner | 35 min |
| Aug 26, 12:51 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Ramsey | 34 min |
| Aug 26, 4:01 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 34 min |
| Aug 26, 4:30 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 35 min |
| Aug 26, 5:01 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 34 min |
| Aug 26, 6:08 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Pembina | 32 min |
| Aug 26, 6:37 PM CDT | Tornado Warning | FGF | Cavalier, Pembina | 33 min |
Nearby
Severe 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.