Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 134, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 25, 1997, 4:28 PM CDT for Cavalier 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
- Jul 25, 1997, 4:28 PM CDT (21:28 UTC)
- Expired
- Jul 25, 1997, 5:00 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 21:29 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 25, 3:00 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 9.5 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
- 655 J/kg
- Mixed-layer CIN
- -252 J/kg
- Mixed-layer LCL
- 1262 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
495 WUUS1 KFAR 252129 RRA SVRFAR NDC019-252200- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 428 PM CDT FRI JUL 25 1997 THE NATIONAL WEATHER SERVICE IN EASTERN ND/GRAND FORKS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 500 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST NORTH DAKOTA ...EASTERN CAVALIER COUNTY AT 526 PM CDT A SEVERE THUNDERSTORM WAS 12 MILES NORTHEAST OF LANGDON. MOVEMENT WAS NORTHEAST AT 20 MPH. THE THUNDERSTORM WILL BE IN NORTHEAST CAVALIER COUNTY WEST OF WALHALLA BY AROUND 5 PM CDT. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. HOPPES
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 Jul 25, 2:56 PM CDT, 1 hour 32 minutes earlier.
Area forecast discussion, Jul 25, 2:56 PM CDT, 1 hour 32 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 255 PM CDT FRI JUL 25 1997 PROBLEM FOR FIRST PERIOD IS PCPN. TSRA ALREADY IN WESTERN PART OF CWFA MOVINMG NE WITH KMVX 88D ESTIMATING 1.4 INCHES IN SOUTHERN BENSON COUNTY. 18Z SFC ANALYSIS HAS STATIONARY FRONT SLIGHTLY FURTHER EAST WITH NUMEROUS LEFTOVER BOUNDARIES. NGM CONTINUES TO HAVE THE BEST HANDLE ON SITUATION WITH UPPER LEVEL DIVERGENCE AND NE-SW ORIENTED THETA-E RIDGE. LOOKS LIKE BEST CHANCE FOR SEVERE WEATHER IS IN THE DVL AREA. THE POTENTIAL FOR HEAVY RAIN IS ALSO A GOOD POSSIBILITY. FLASH FLOOD GUIDANCE IN DVL AREA RANGES FROM 1 INCH TO UNDER 2 INCHES IN THREE HOURS. SUGGEST STRONGLY CONSIDER FLASH FLOOD WATCH FOR DVL AREA. SUGGESTIONS: DVL/NELSON/GRIGGS/BARNES...GOOD CHANCE OF THUNDERSTORMS...POSSIBLY SEVERE WITH HEAVY RAIN. LOW NEAR 65. GFK/FAR...A 40 PERCENT CHANCE OF THUNDERSTORMS. LOW OF 65 TO 70. ROX/TVF/BJI...A 40 PERCENT CHANCE OF THUNDERSTORMS. LOW OF 65 TO 70. DTL/FFM...A 30 PERCENT CHANCE OF THUNDERSTORMS. LOW IN THE UPPER 60S. GSF
In the hours before
Special weather statement, Jul 25, 12:44 PM CDT, 3 hours 44 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052-053-261200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1244 PM CDT FRI JUL 25 1997 ...THERE IS A SLIGHT RISK FOR SEVERE WEATHER OVER EASTERN NORTH DAKOTA LATE THIS AFTERNOON AND EVENING... AS IN THE PAST SEVERAL DAYS VERY WARM...MOIST AND UNSTABLE AIR WILL CONTINUE ACROSS THE REGION AS AN AREA OF LOW PRESSURE OVER THE NORTHERN PLAINS REMAINS STATIONARY. WHILE THE POSSIBILITY EXISTS FOR THUNDERSTORM DEVELOPMENT ANYWHERE IN THIS UNSTABLE AIR MASS IT APPEARS THAT THE BEST AREAS FOR SEVERE WEATHER WILL BE ACROSS NORTHEAST NORTH DAKOTA. THIS AREA INCLUDES THE DEVILS LAKE...CANDO AND NEW ROCKFORD AREAS. THESE STORMS COULD THEN THEN AFFECT THE LANGDON...CAVALIER...PARK RIVER AND GRAND FORKS AREAS LATER THIS EVENING. PRIMARY CONCERN WOULD BE DAMAGING WINDS AND LARGE HAIL. WITH HIGH LEVELS OF MOISTURE IN THE ATMOSPHERE...VERY HEAVY RAINS ARE ALSO A POSSIBILITY. GSF
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 8:55 PM CDT | Severe Thunderstorm Warning | FGF | Towner | 35 min |
| Jul 25, 12:32 AM CDT | Severe Thunderstorm Warning | FGF | Benson | 28 min |
| Jul 25, 5:27 PM CDT | Tornado Warning | FGF | Walsh | 33 min |
| Jul 25, 6:00 PM CDT | Tornado Warning | FGF | Walsh | 30 min |
| Jul 25, 6:26 PM CDT | Severe Thunderstorm Warning | FGF | Sargent | 34 min |
| Jul 25, 6:45 PM CDT | Flash Flood Warning | FGF | Walsh | 2 hr |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.