Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 132, NWS Grand Forks, ND

July 24, 1997Towner County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 24, 1997, 8:55 PM CDT for Towner County, North Dakota. It was in force for 35 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 24, 1997, 8:55 PM CDT (01:55 UTC)
Expired: Jul 24, 1997, 9:30 PM CDT
In force: 35 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Towner County, ND

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 24, 5:45 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.9 hours before the alert went out and 239 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2435 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 1524 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: -21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KFAR 250155 RRA
SVRFAR
NDC095-250230-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
855 PM CDT THU JUL 24 1997
 
THE NATIONAL WEATHER SERVICE IN EASTERN ND/GRAND FORKS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  930 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTH CENTRAL NORTH DAKOTA
 
   ...SOUTHERN TOWNER COUNTY
 
AT 855 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM WAS 45 MILES
NORTHWEST OF DEVILS LAKE OR 7 MLES SOUTHWEST OF BISBEE. MOVEMENT WAS
SOUTHEAST AT 30 MPH. THE THUNDERSTORM WILL REACH THE THUNDERSTORM WILL
BE BETWEEN CANDO AND MAZA BY 915 PM CDT.
 
REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO
PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING.
 
SCHUMACHER
 
&

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 24, 3:04 PM CDT, 5 hours 51 minutes earlier.

Area forecast discussion, Jul 24, 3:04 PM CDT, 5 hours 51 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
300 PM CDT THU JUL 24 1997

PROBLEM FOR FIRST PERIOD IS PCPN. ETA AND NGM BOTH TRYING TO PUCH SFC
FRONT EAST INTO CWFA. HOWEVER...FRONT PROBABLY WON'T MAKE IT THROUGH
UNTIL SOMETIME SATURDAY. PWATS CONTINUE TO RUN ABOVE 1.25 WITH LI'S OF
-8 ACROSS CWFA ON LATEST ADAP GRAPHIC AND LITTLE CAP. NGM SEEMS TO HAVE
BEST HANDLE ON FIRST PERIOD FEATURES WITH UPPER LEVEL DIVERGENCE ACROSS
THE NORTHERN TIER BY 00Z ALONG WITH THETA-E RIDGE...THINK THUNDERSTORMS
WILL MOVE HERE AFTER FIRING UP IN NW ND.

SUGGESTIONS FOR ND:
DVL/GFK/FAR...MOSTLY CLOUDY WITH A GOOD CHANCE OF THUNDERSTORMS. LOW OF
60 TO 65 FOR DVL. GFK/FAR NEAR 65.

MN: GOOD CHANCE OF THUNDERSTOMS. LOWS NEAR 65 FOR ROX/TVF/BJI. IN THE
UPPER 60S FOR DTL/FFM.

GSF

The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 25, 12:32 AM CDT	Severe Thunderstorm Warning	FGF	Benson	28 min
Jul 25, 4:28 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier	32 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, 1997 Every 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.