Alert archive / Minnesota / Tornado Warnings in 1991

Tornado Warning 7, NWS Grand Forks, ND

June 25, 1991Lake of the Woods County, Roseau County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Jun 25, 1991, 4:01 PM CDT for Lake of the Woods County, Roseau County, Minnesota. It was in force for 44 min.

The area

The counties it named.

The facts

Issued
Jun 25, 1991, 4:01 PM CDT (21:01 UTC)
Expired
Jun 25, 1991, 4:45 PM CDT
In force
44 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

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

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 9.0 hours before the alert went out and 153 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, International Fa, MN at 12:00Z on 1991-06-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 394 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, International Fa, MN at 12:00Z on 1991-06-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 square meters per square second.193958Sfc1 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
394 J/kg
Mixed-layer CIN
-228 J/kg
Mixed-layer LCL
791 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
93 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 tornado 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 25, 11:10 AM CDT, 4 hours 51 minutes before
STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
1110 AM CDT TUE JUN 25 1991

TIME      EVENT
1055AM    DIME SIZE HAIL NORTH OF HALLOCK MINNESOTA...KITTSON COUNTY
          RPTD BY MN HWY PATROL
Special weather statement, Jun 25, 11:38 AM CDT, 4 hours 23 minutes before
NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013-251730-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
1138 AM CDT TUE JUN 25 1991

 ...THE THUNDERSTORM WARNING FOR KITTSON COUNTY MINNESOTA HAS EXPIRED...
AT 1126 AM CDT...STRONG THUNDERSTORMS CONTINUED OVER THE NORTHWEST
CORNER OF MINNESOTA...20 MILES SOUTHEAST OF PEMBINA...NEAR THE TOWN OF
HALLOCK.  DIME SIZE HAIL WAS REPORTED NORTH OF THE HALLOCK AREA AROUND
1055 AM CDT.  HALLOCK RECEIVED SOME SMALL HAIL AND .69 INCH OF RAIN AS
THE STORMS MOVED THROUGH.

OTHER SHOWERS AND THUNDERSTORMS WERE LOCATED FROM 35 MILES SOUTHWEST OF
PEMBINA...NEAR THE TOWN OF GRAFTON...AND EXTENDED EAST TO WARROAD...IN
NOR*THERN MINNESOTA.  MOVEMENT OF THESE STORMS WAS EAST AT 25 TO 30 MPH.

THE NORTHWEST CORNER OF MINNESOTA WILL LIKELY SEE SHOWERS AND THUNDER-
STORMS UNTIL 130 OR 200 PM CDT.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 25, 8:28 AM CDTSevere Thunderstorm WarningFGFClay62 min
Jun 25, 10:08 AM CDTSevere Thunderstorm WarningFGFKittson67 min
Jun 25, 3:16 PM CDTSevere Thunderstorm WarningFGFKoochiching59 min
Jun 25, 3:18 PM CDTTornado WarningFGFRoseau42 min

Nearby

Tornado Warnings in Minnesota, 1991Every tornado warning in 1991Tornadoes 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; the sounding from the Mesonet's radiosonde archive.