Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 174, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 5, 1997, 3:09 PM CDT for Pembina County, North Dakota. It was in force for 36 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
- Aug 5, 1997, 3:09 PM CDT (20:09 UTC)
- Expired
- Aug 5, 1997, 3:45 PM CDT
- In force
- 36 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Pembina County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 139 km from the middle of the area, began a volume at 20:11 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 5, 3:15 PM CDT | Hail 0.75 | Backoo, ND | |
| Aug 5, 3:30 PM CDT | Hail 0.75 | Cavalier, ND | |
| Aug 5, 3:55 PM CDT | Hail 1 | Cavalier, 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
International Fa, MN (KINL), launched 12:00Z, 8.2 hours before the alert went out and 313 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1490 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 68 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 052017 COR SVRFAR NDC067-052045- BULLETIN - IMMEDIATE BROADCAST REQUESTED...CORRECTION SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 309 PM CDT TUE AUG 5 1997 THE NATIONAL WEATHER SERVICE IN EASTERN ND/GRAND FORKS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 345 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST NORTH DAKOTA ...PEMBINA COUNTY AT 310 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM 40 MILES NORTH OF GRAFTON OR NEAR LEROY MOVING SOUTHEAST AT 30 MILES AN HOUR. SOME TOWNS AFFECTED INCLUDE CAVALIER BACKOO. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. SEVERE THUNDEBRSTORMS PRODUCE DAMAGING WIND OVER 57 MPH...HAIL 3/4 INCH IN DIAMETER OR LARGER...TORNADOES...DEADLY LIGHTNING...AND VERY HEAVY RAIN. MOVE TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.
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 5, 2:50 PM CDT, 19 minutes earlier.
Area forecast discussion, Aug 5, 2:50 PM CDT, 19 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
250 PM CDT TUE AUG 5 1997
FCST CONCERN WILL BE SVR TSRA DEVELOPMENT INTO EARLY PART OF PERIOD.
SFC LOW HAS DEVELOPED ACROSS NE ND/S MB BORDER WITH TRAILING COLD FRONT
ACROSS NORTH PART OF STATE. ALL MORNING AND INTO AFTERNOON HOURS SCT
TSRA HAVE OCCURRED MAINLY ALONG N/S ORIENTED THERMAL BOUNDARY OVR
NORTHERN MN. WITH RAIN AND CLOUD COOLED AIR TEMPS ACROSS PTNS OF N MN
REMAIN GENERALLY IN THE 60S TO AROUND 70 DEGREES. ALTHOUGH A SEVERE
THREAT CONT FOR NW MN BELIEVE BEST AREA HAS SHIFTED WESTWARD TO INCLUDE
MOST OF ND. ALTHOUGH LOW LEVEL MOISTURE IS MARGINAL 60-65 DEGREE
DEWPOINTS EXIST ACROSS N CENTRAL ND INTO S MB NEAR SFC LOW. PLENTY OF
SOLAR HAS RISEN TEMPS INTO THE UPPER 70S AND 80S ACROSS ND. VERTICAL
SHEAR PROFILE ALSO CONDUSIVE FOR SVR WX. FROM PROGGED FAR SOUNDING TSRA
SHOULD TRACK SE AROUND 30KT. TSRA SHOULD MOVE OUT OF S PTN OF REGION BY
MID FOLLOWED BY DECREASING CLDS. MOS TEMPS FROM MID 50S TO AROUND 60
SEEM REASONABLE. WITH WK SFC FLOW AND CLEARING LATE AREAS OF FOG PSBL.
FOR DVL...THIS EVENING...SCT TSRA FEW PSBL SEVERE.
TONIGHT...DEC CLDS. LOW MID 50S N 5 TO 10.
GFK...THIS EVENING...SCT TSRA FEW PSBL SEVERE.
TONIGHT...DEC CLDS. LOW MID 50S. LT N WIND.
FAR...THIS EVENING...SCT TSRA FEW PSBL SEVERE.
TONIGHT...DEC CLDS. LOW MID 50S. LT N WND.
MSP WRK ZONES LOOK OK.
VOELKERIn the hours before
Special weather statement, Aug 5, 1:45 PM CDT, 1 hour 24 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052-053-061200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 145 PM CDT TUE AUG 05 1997 ...SEVERE WEATHER MAY OCCUR TODAY OVER EASTERN NORTH DAKOTA THIS AFTERNOON AND EVENING... AN AREA OF LOW PRESSURE WAS LOCATED ALONG THE NORTHEAST NORTH DAKOTA/CANADIAN BORDER WITH A TRAILING COLD FRONT ACROSS THE REMAINDER OF NORTHERN NORTH DAKOTA. EAST OF THIS AREA OF LOW PRESSURE SCATTERED THUNDERSTORMS HAVE CONTINUED ACROSS NORTHERN MINNESOTA THROUGH THE MORNING AND AFTERNOON HOURS. BECAUSE OF THE RAIN AND CLOUD COVER THE AIRMASS ACROSS THIS AREA HAS BECOME FAIRLY STABLE. ALTHOUGH A SEVERE STORM IS POSSIBLE ACROSS EXTREME WESTERN MINNESOTA ...THE MOST FAVORABLE LOCATION FOR SEVERE WEATHER THIS AFTERNOON HAS SHIFTED WEST TO INCLUDE MOST OF EASTERN NORTH DAKOTA. STRONG THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS NORTHERN PORTIONS OF NORTH DAKOTA THIS AFTERNOON MOVING SOUTHEAST DURING THE EVENING HOURS. SOME OF THESE STORMS COULD BECOME SEVERE WITH THE PRIMARY CONCERN BEING LARGE HAIL AND DAMAGING WINDS. BECAUSE OF THE WIND PATTERN ALOFT...ISOLATED TORNADOS ARE ALSO POSSIBLE. SEVERE WEATHER SPOTTERS MAY BE NEEDED THIS AFTERNOON AND EARLY EVENING IN EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA. VOELKER
Special weather statement, Aug 5, 1:58 PM CDT, 1 hour 11 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052-053-061200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 145 PM CDT TUE AUG 05 1997 ...SEVERE WEATHER MAY OCCUR TODAY OVER EASTERN NORTH DAKOTA THIS AFTERNOON AND EVENING... AN AREA OF LOW PRESSURE WAS LOCATED ALONG THE NORTHEAST NORTH DAKOTA/CANADIAN BORDER WITH A TRAILING COLD FRONT ACROSS THE REMAINDER OF NORTHERN NORTH DAKOTA. EAST OF THIS AREA OF LOW PRESSURE SCATTERED THUNDERSTORMS HAVE CONTINUED ACROSS NORTHERN MINNESOTA THROUGH THE MORNING AND AFTERNOON HOURS. BECAUSE OF THE RAIN AND CLOUD COVER THE AIRMASS ACROSS THIS AREA HAS BECOME FAIRLY STABLE. ALTHOUGH A SEVERE STORM IS POSSIBLE ACROSS EXTREME WESTERN MINNESOTA ...THE MOST FAVORABLE LOCATION FOR SEVERE WEATHER THIS AFTERNOON HAS SHIFTED WEST TO INCLUDE MOST OF EASTERN NORTH DAKOTA. STRONG THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS NORTHERN PORTIONS OF NORTH DAKOTA THIS AFTERNOON MOVING SOUTHEAST DURING THE EVENING HOURS. SOME OF THESE STORMS COULD BECOME SEVERE WITH THE PRIMARY CONCERN BEING LARGE HAIL AND DAMAGING WINDS. BECAUSE OF THE WIND PATTERN ALOFT...ISOLATED TORNADOS ARE ALSO POSSIBLE. SEVERE WEATHER SPOTTERS MAY BE NEEDED THIS AFTERNOON AND EARLY EVENING IN EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA. VOELKER
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 3:44 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 31 min |
| Aug 5, 4:07 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 38 min |
| Aug 5, 4:33 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 27 min |
| Aug 5, 4:58 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 32 min |
| Aug 5, 5:27 PM CDT | Severe Thunderstorm Warning | FGF | Traill | 33 min |
| Aug 5, 6:51 PM CDT | Tornado Warning | FGF | Cass | 29 min |
Nearby
Severe 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.