Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 46, NWS Grand Forks, ND

June 26, 1991Lake of the Woods County, Roseau County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 26, 1991, 2:35 AM CDT for Lake of the Woods County, Roseau County, Minnesota. It was in force for 40 min. 1 report 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, 2:35 AM CDT (07:35 UTC)
Expired
Jun 26, 1991, 3:15 AM CDT
In force
40 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

Counties Lake of the Woods County, MN, Roseau County, MN

What was reported inside it

TimeReportWhereRemark
Jun 26, 3:15 AM CDTThunderstorm Wind 0Roseau, MN

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, 7.6 hours before the alert went out and 457 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-pSkew-T log-p diagram, Bismarck Municip, ND at 00:00Z on 1991-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3404 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 00:00Z on 1991-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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

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

Special weather statement, Jun 25, 8:48 PM CDT, 5 hours 47 minutes before
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Special weather statement, Jun 26, 12:43 AM CDT, 1 hour 52 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, 55 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

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 26, 3:10 AM CDTSevere Thunderstorm WarningFGFBeltrami, Lake of the Woods, Roseau65 min
Jun 26, 4:20 AM CDTSevere Thunderstorm WarningFGFBeltrami, Koochiching, Lake of the Woods55 min
Jun 26, 6:01 AM CDTSevere Thunderstorm WarningFGFPolk59 min
Jun 26, 7:00 AM CDTSevere Thunderstorm WarningFGFPolk60 min
Jun 26, 7:32 AM CDTSevere Thunderstorm WarningFGFBeltrami, Clearwater58 min
Jun 26, 7:33 AM CDTSevere Thunderstorm WarningFGFPennington, Red Lake47 min
Jun 26, 8:35 AM CDTSevere Thunderstorm WarningFGFBeltrami, Clearwater55 min
Jun 26, 8:59 AM CDTSevere Thunderstorm WarningFGFKoochiching31 min
Jun 26, 9:44 AM CDTSevere Thunderstorm WarningFGFKoochiching61 min
Jun 26, 5:13 AM CDTSevere Thunderstorm WarningFGFGriggs, Steele62 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1991Every 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.