Alert archive / North Dakota / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 49, NWS Grand Forks, ND

June 26, 1991Griggs County, Steele County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 26, 1991, 5:13 AM CDT for Griggs County, Steele County, North Dakota. It was in force for 62 min. 2 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 26, 1991, 5:13 AM CDT (10:13 UTC)
Expired: Jun 26, 1991, 6:15 AM CDT
In force: 62 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

Counties Griggs County, ND, Steele County, ND

What was reported inside it

Time	Report	Where	Remark
Jun 26, 5:35 AM CDT	Hail 0.75	Griggs, ND
Jun 26, 6:00 AM CDT	Hail 1.75	Steele, 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, 10.2 hours before the alert went out and 219 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: 3404 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 1292 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 9.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFAR 261013 RRA
SVRFAR
NDC039-091-261115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE FARGO ND
513 AM CDT WED JUN 26 1991

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 615 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE EAST CENTRAL PART OF NORTH DAKOTA
      EASTERN GRIGGS...NORTHERN STEELE

AT 605 AM RADAR INDICATED A SEVERE THUNDERSTORM OVER CENTRAL GRIGGS
COUNTY...NEAR THE CITY OF COOPERSTOWN. THIS SEVERE THUNDERSTORM WAS
MOVING NORTHEAST AT 50 MILES AN HOUR AND WILL AFFERT THE CITIES OF
COOPERSTOWN AND SHARON/FINLEY BY 6 AM THIS WEDNESDAY MORNING.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.

REMEMBER...SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
A TORNADO WITH LIThTLE OR NO ADVANCE WARNING...SO BE ON THE LOOKOUT.
IF YOU SPOT A FUNNEL OR A TORNADO YOU SHOULD SEEK SHELTER IN A
REINFORCED BUILDING OR IN AN INTERIOR ROOM AWAY FROM OUTSIDE WALLS.

PRUITT

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

Special weather statement, Jun 26, 12:43 AM CDT, 4 hours 30 minutes before

NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013-260645-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
1240 AM CDT WED JUN 26 1991

...SEVERE THUNDERSTORM WATCH FOR EASTERN NORTH DAKOTA AND PART
   OF NORTHWEST MINNESOTA UNTIL 500 AM CDT...

AT 1227 AM CDT...ISOLATED INTENSE THUNDERSTORMS WERE OVER PARTS OF
EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA.

THE INTENSE THUNDERSTORMS WERE LOCATED JUST NORTH OF GRAND FORKS
...40 MILES NORTHWEST OF JAMESTOWN NORTH DAKOTA...AND 55 MILES NORTH
OF THIEF RIVER FALLS MINNESOTA.

IN ADDITION TO VERY HEAVY RAIN THESE STORMS COULD PRODUCE HAIL...STRONG
WIND GUSTS..AND FREQUENT DANGEROUS LIGHTING STRIKES.

MOVMENT OF THE STORMS WAS NORTHEAST AT 40 MILES AN HOUR.  THE STORMS
WILL NEAR THE TOWNS OF MCHENRY NORTH DAKOTA...40 MILES NORTH OF
JAMESTOWN...AND KARLSTAD MINNESOTA...35 MILES NORTHWEST OF
THIEF RIVER FALLS BY 130 AM CDT.

IF YOU ARE IN OR NEAR ONE OF THE TOWNS MENTIONED...YOU SHOULD
BE ALERT FOR THE POSSIBLITY OF THE ABOVE WEATHER CONDITIONS.

KEEP IN MIND THE THE SEVERE THUNDERSTORM WATCH AND STAY TUNED
FOR FURTHER UPDATES ON THESE INTENSE THUNDERSTORMS...AND POSSIBLE
WARNINGS...ON YOUR LOHCAL TV...RADIO...AND NOAA WEATHER RADIO
STATIONS.

DM

Special weather statement, Jun 26, 1:40 AM CDT, 3 hours 33 minutes before

NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013-260745-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
137 AM CDT WED JUN 26 1991

...SEVERE THUNDERSTORM WATCH FOR EASTERN NORTH DAKOTA AND PART
   OF NORTHWEST MINNESOTA UNTIL 500 AM CDT...

AT 127 AM CDT...ISOLATED INTENSE THUNDERSTORMS CONTINUED OVER PARTS
OF NORTHEAST NORTH DAKOTA AND NORTHWEST MINNESOTA.

THE INTENSE THUNDERSTORMS WERE LOCATED 45 MILES WEST OF GRAND FORKS
NORTH DAKOTA...20 MILES NORTHWEST AND 50 MILES NORTH OF
THIEF RIVER FALLS MINNESOTA.

IN ADDITION TO VERY HEAVY RAIN THESE STORMS COULD PRODUCE HAIL...STRONG
WIND GUSTS..AND FREQUENT DANGEROUS LIGHTING STRIKES.

AT 125 AM CDT PEA TO MARBLE SIZE HAIL FELL AT LAKOTA NORTH DAKOTA...45
MILES WEST OF GRAND FORKS.
MOVEMENT WAS NORTH EAST AT 40 MILES AN HOUR.  THE STORMS WILL BE
NEAR GRAFTON NORTH DAKOTA...MALUNG AND WARROAD MINNESOTA BY
230 AM CDT.

IF YOU ARE IN OR NEAR ONE OF THE CITIES OR TOWNS MENTIONED...YOU
SHOULD BE ALERT FOR THE POSSIBLITY OF THE ABOVE WEATHER CONDITIONS.

KEEP IN MIND THE THE SEVERE THUNDERSTORM WATCH AND STAY TUNED
FOR FURTHER UPDATES ON THESE INTENSE THUNDERSTORMS...AS WELL AS...
POSSIBLE WARNINGS...ON YOUR LOCAL TV...RADIO...AND NOAA WEATHER
RADIO STATIONS.

OTHER SCATTERED THUNDERSTORMS AND RAIN SHOWERS WERE ALSO OVER
EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA.  THE THUNDERSTORMS
AND SHOWERS EXTENDED FROM NEAR JAMESTOWN NORTH DAKOTA TO NEAR
WARROAD MINNESOTA.  THESE WERE ALSO MOVING NORTHEAST AT 40 MILES
AN HOUR.

DM

Special weather statement, Jun 26, 2:43 AM CDT, 2 hours 30 minutes before

NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013-260845-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
240 AM CDT WED JUN 26 1991

...SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR NORTHWEST MINNESOTA
   UNTIL 5 AM...BUT HAS BEEN CANCELED FOR EASTERN NORTH DAKOTA...

AT 225 AM CDT...INTENSE THUNDERSTORMS...WITH VERY HEAVY RAIN WERE OVER
THE CENTRAL AND NORTHERN RED RIVER VALLEY.

THE STRONGEST THUNDERSTORM WAS 25 MILES NORTHEAST OF GRAND FORKS IN
EXTREME SOUTHWEST MARSHALL COUNTY OF NORTHWEST MINNESOTA NEAR THE TOWNS
OF ARGYLE AND OSLO. THIS INTENSE THUNDERSTORM WILL LIKELY PRODUCE SMALL
HAIL...VERY HEAVY RAIN ALONG WITH DEADLY LIGHTNING AS IT MOVES EAST AT
AT 40 MILES AN HOUR. THIS THUNDERSTORM SHOULD MOVE EAST ACROSS SOUTHERN
MARSHALL COUNTY OF NORTHWEST MINNESOTA BY 330 AM.

OTHER SCATTERED STRONG THUNDERSTORMS WITH VERY HEAVY RAIN WERE OCCURRING
OVER A 15 TO 20 MILE WIDE AREA FROM JUST NORTH OF FARGO/MOORHEAD
NORTHWARD THROUGH THE CROOKSTON AREA OF NORTHWEST MINNESOTA.
THESE THUNDERSTORMS WERE ALSO MOVING EAST AT 40 MILES AN HOUR
AND MUCH OF THIS AREA SHOULD MOVE INTO NORTHWEST MINNESOTA BY
330 AM.

PERSONS OVER NORTHWEST MINNESOTA...ESPECIALLY IN AN AREA FROM
WARROAD...SOUTHWEST THROUGH THIEF RIVER FALLS AND INTO THE ADA
AREA CAN EXPECT THESE THUNDERSTORMS THROUGH 330 AM.

OTHER SCATTERED SHOWERS AND THUNDERSHOWERS WERE OCCURRING OVER
EXTREME NORTHEAST NORTH DAKOTA AND NORTHWEST MINNESOTA.

STAY TUNED FOR FURTHER STATEMENTS AND POSSIBLE WARNINGS ON THIS
POTENIALLY SEVERE WEATHER.
SPIES

Special weather statement, Jun 26, 3:36 AM CDT, 1 hour 37 minutes before

NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013-260930-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
335 AM CDT WED JUN 26 1991

...SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR A PORTION OF
   NORTHWEST MINNESOTA UNTIL 5 AM CDT...

AT 326 AM CDT...INTENSE THUNDERSTORMS...SOME WITH VERY STRONG WIND...
VERY HEAVY RAIN...SMALL HAIL AND DEADLY LIGHTNING WERE MOVING INTO
NORTH CENTRAL MINNESOTA.

MOST OF THESE THUNDERSTORMS HAD MOVED INTO ROSEAU...NORTHERN BELTRAMI
AND LAKE OF THE WOODS COUNTIES OF NORTH CENTRAL MINNESOTA. MOVEMENT
WAS EAST AT 45 MILES AN HOUR AND PERSONS OVER THIS AREA AND THE LAKE
OF THE WOODS CAN EXPECT THESE STORMS THROUGH 4 AM.

THERE WERE A FEW SCATTERED SHOWERS AND THUNDERSHOWERS THAT WERE
LINGERING OVER A SMALL PART OF NORTHWEST MINNESOTA BUT AREAL COVERAGE
HAD DECREASED CONSIDERABLY SINCE 230 AM.
.
THIS WILL BE THE LAST STATEMENT ON THIS ACTIVITY MOVING INTO
NORTH CENTRAL MINNESOTA UNLESS FURTHER ACTIVITY DEVELOPS.
SPIES

Special weather statement, Jun 26, 4:42 AM CDT, 31 minutes before

NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013-261030-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
440 AM CDT WED JUN 26 1991

AT 425 AM CDT...A SMALL AREA OF INTENSE THUNDERSTORMS HAD DEVELOPED
OVER EAST CENTRAL NORTH DAKOTA...GENERALLY OVER NORTH CENTRAL STUTSMAN
...FOSTER AND EDDY COUNTIES.

THIS AREA WAS ABOUT 20 MILES WIDE THAT EXTENDED FROM 15 MILES NORTH OF
JAMESTOWN TO 15 MILES SOUTH OF DEVILS LAKE. THE STRONGEST THUNDERSTORM
WHICH CONTAINED VERY HEAVY RAIN...SMALL HAIL AND STRONG GUSTY WINDS
WAS 25 MILES NORTH OF JAMESTOWN AND WAS MOVING NORTHEAST AT 45 MILES
AN HOUR. THIS STORM SHOULD MOVE INTO EASTERN FOSTER AND INTO NORTHERN
GRIGGS COUNTY OF EAST CENTRAL NORTH DAKOTA BY 530 AM.

ALSO...PERSONS OVER EASTERN EDDY AN NELSON COUNTIES OF EAST CENTRAL
AND NORTHEAST NORTH DAKOTA CAN EXPECT THESE THUNDERSTORMS TO MOVE
INTO THAT AREA BY 530 AM.
.
STAY TUNED FOR FURTHER STATEMENTS AND HPOSSIBLE WARNINGS ON THIS
POTENIALLY SEVERE WEATHER.
SPIES

Local storm report, Jun 26, 5:01 AM CDT, 12 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
500 AM CDT WED JUN 26 1991

TIME      EVENT
450AM     LATE REPORT ON POSSIBLE TORNADO THAT HIT THE CITY OF WARREN
          MN IN SOUTHWEST MARSHALL COUNTY_ AROUND 230 AM. NUMEROUS TREES
          DOWN ALONG WITH SOME ROOF DAMAGE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 26, 6:01 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	59 min
Jun 26, 7:00 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Traill	60 min

Nearby

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.