Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 37, NWS Grand Forks, ND

June 13, 1991Clay County, Minnesota; Cass County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 13, 1991, 9:44 PM CDT for Clay County, Minnesota; Cass County, North Dakota. It was in force for 61 min. 4 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: Jun 13, 1991, 9:44 PM CDT (02:44 UTC)
Expired: Jun 13, 1991, 10:45 PM CDT
In force: 61 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

Counties Clay County, MN, Cass County, ND

What was reported inside it

Time	Report	Where
Jun 13, 9:48 PM CDT	Tornado F0	Cass, ND
Jun 13, 9:50 PM CDT	Hail 0.75	Cass, ND
Jun 13, 10:00 PM CDT	Thunderstorm Wind 0	Clay, MN
Jun 13, 10:05 PM CDT	Hail 1	Cass, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 2.7 hours before the alert went out and 292 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: NaN m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Local storm report, Jun 13, 5:29 PM CDT, 4 hours 15 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
525 PM CDT THU JUN 13 1991

TIME           EVENT
435 PM CDT     NELSON COUNTY SHERIFFS OFFICE REPORTED QUARTER SIZED
               HAIL NORTH OF TOLNA NORTH DAKOTA OR 25 MILES SOUTHEAST
               OF DEVILS LAKE ND.
450 PM CDT     GRAND FORKS AFB PERSONEL REPORTED TORNADO 10 MILES EAST
               OF BROCKET ND OR 30 MILES EAST OF DEVILS LAKE ND.
505 PM CDT     AIR FORCE MISSLE SILO PERSONEL ON WALSH COUNTY LINE
               REPORTED TORNADO 5 MILES NORTHEAST OF BROCKET ND MOVING
               NORTHEAST. THEY WERE TAKING SHELTER.
510 PM CDT     OBSERVER IN GRIGGS COUNTY NORTH DAKOTA REPORTED 45 MPH
               WIND AND PEA SIZED EHAIL AT SUTTON NORTH DAKOTA.
517 PM CDT     AIR FORCE MISSLE SILO PERSONEL AT LANGDON NORTH DAKOTA
               REPORTED MARBLE SIZED HAIL AND A FUNNEL CLOUD.
ANDERSEN

Special weather statement, Jun 13, 5:41 PM CDT, 4 hours 3 minutes before

NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013-132330-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
530 PM CDT THU JUN 13 1991

...A TORNADO WATCH IS IN EFFECT FOR PARTS OF EASTERN NORTH DAKOTA
AND NORTHWEST MINNESOTA UNTIL 9 PM CDT...

A LINE OF INTENSE THUNDERSTORMS EXTENDED FROM 60 MILES NORTHWEST OF
GRAND FORKS NORTH DAKOTA SOUTH TO 30 MILES SOUTH OF JAMESTOWN NORTH
DAKOTA. THESE THUNDERSTORMS WERE MOVING NORTH AT 20 TO 25 MPH.

EARLIER THIS LINE OF THUNDERSTORMS HAD PRODUCED LARGE HAIL AND FUNNEL
CLOUDS OVER RAMSEY AND NELSON COUNTIES OF NORTH DAKOTA. PEA TO MARBLE
SIZED HAIL AND GUSTY WINDS HAD ALSO BEEN REPORTED NEAR LANGDON...SUTTON
AND IN JAMESTOWN NORTH DAKOTA. THIS LINE OF THUNDERSTORMS WAS MOVING
SLOW ENOUGH TO PRODUCE SMALL STREAM AND LOW LYING AREA FLOODING.

PERSONS IN THE WATCH AREA SHOULD REMAIN ALERT FOR RAPIDLY CHANGING
WEATHER CONDITIONS.
PLEASE STAY TUNED TO YOUR LOCAKL RADIO AND TV STATIONS AND NOAA
WEATHER RADIO FOR LATEST INFORMATION ON THESE THUNDERSTORMS.
ANDERSEN

Local storm report, Jun 13, 7:32 PM CDT, 2 hours 12 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
720 PM CDT THU JUN 13 1991

TIME           EVENT
544 PM CDT     3/4 INCH HAIL REPORTED AT NEKOMA NORTH DAKOTA...10 MILES
               SOUTH OF LANGDON NORTH DAKOTA.
515 PM CDT     DELAYED REPORT...ONE EAST AND 1/2 MILE SOUTH OF NEKOMA
               NORTH DAKOTA REPORTED ROOF TAKEN OFF OF HOUSE. BARN
               MOVED OFF FOUNDATION. ONE MILE SOUTH OF THAT LOCATION
               A FARM SUFFERED EXTENSIVE DAMAGE...NO DETAILS.
718 PM CDT     CONFIRMED REPORT OF TORNADO 6 MILES NORTHEAST OF WARREN
               MINNESOTA...25 MILES NORTHEAST OF GRAND FORKS NORTH
               DAKOTA...TREES UPROOTED...OTHER MINOR DAMAGE. REPORT
               FROM LAW ENFORCEMENT.
ANDERSEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 7:26 PM CDT	Severe Thunderstorm Warning	FGF	Roseau	64 min
Jun 13, 7:28 PM CDT	Severe Thunderstorm Warning	FGF	Polk, Red Lake	32 min
Jun 13, 8:37 PM CDT	Severe Thunderstorm Warning	FGF	Roseau	68 min
Jun 13, 8:03 PM CDT	Tornado Warning	FGF	Barnes	42 min
Jun 13, 8:16 PM CDT	Severe Thunderstorm Warning	FGF	Griggs, Steele	59 min
Jun 13, 8:53 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	67 min
Jun 13, 9:14 PM CDT	Severe Thunderstorm Warning	FGF	Cass	46 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1991 Severe Thunderstorm Warnings in North Dakota, 1991 Every severe thunderstorm warning in 1991

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.