Alert archive / Minnesota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 81, NWS Grand Forks, ND

September 11, 1994Polk County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Sep 11, 1994, 3:22 PM CDT for Polk County, Minnesota. It was in force for 68 min.

The area

The counties it named.

The facts

Issued: Sep 11, 1994, 3:22 PM CDT (20:22 UTC)
Expired: Sep 11, 1994, 4:30 PM CDT
In force: 68 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Polk County, MN

The nearest sounding before it

Aberdeen, SD (KHON), launched 12:00Z, 8.4 hours before the alert went out and 354 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: 117 J/kg
Mixed-layer CIN: -591 J/kg
Mixed-layer LCL: 1336 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 225 m²/s²
0-3 km storm-relative helicity: 239 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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

Special weather statement, Sep 11, 12:25 PM CDT, 2 hours 57 minutes before

NDZ007-008-016-026>030-038-039-048-049-051>053-MNZ001>004-
007>009-013>017-022>024-027>032-039>041-047-111830-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
1225 PM CDT SUN SEP 11 1994

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR MUCH OF EASTERN NORTH
DAKOTA AND PART OF NORTHWEST MINNESOTA UNTIL 4PM CDT...

AT 1225 PM CDT A LINE OF STRONG THUNDERSTORMS EXTENDED FROM 10 MILES
SOUTH OF GRAND FORKS NORTH DAKOTA SOUTHWEST TO NEAR TOWER CITY NORTH
DAKOTA. THE STRONGEST THUNDERSTORMS WERE LOCATED NEAR GALESBURG IN
TRAILL COUNTY AND JUST EAST OF TOWER CITY IN CASS COUNTY. THESE
THUNDERSTORMS WERE MOVING EAST AT 25 MPH AND WILL BE OVER EASTERN
TRAILL COUNTY AND MOVING INTO THE FARGO NORTH DAKOTA AREA BY 1PM CDT.

THESE THUNDERSTORMS COULD PRODUCE VERY HEAVY RAIN...HAIL...GUSTY WINDS
AND FREQUENT DANGEROUS LIGHTNING STRIKES.

OTHER SHOWERS AND THUNDERSTORMS CONTINUED OVER EAST CENTRAL...NORTHEAST
AND SOUTHEAST NORTH DAKOTA AND NORTHWEST MINNESOTA. ALL OF THESE
THUNDERSTORMS WERE MOVING NORTHEAST AT 25 TO 30 MPH.

PERSONS NEAR ANY OF THESE THUNDERSTORMS AND IN THE WATCH AREA SHOULD
REMAIN ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS.

STAY TUNED TO NOAA WEATHER RADIO OR YOUR FAVORITE MEDIA OUTLET FOR FURTHER
INFORMATION ABOUT THESE STORMS.
ANDERSEN

Special weather statement, Sep 11, 12:33 PM CDT, 2 hours 49 minutes before

NDZ007-008-016-026>030-038-039-048-049-051>053-MNZ001>004-
007>009-013>017-022>024-027>032-039>041-047-111830-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
1225 PM CDT SUN SEP 11 1994

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR MUCH OF EASTERN NORTH
DAKOTA AND PART OF NORTHWEST MINNESOTA UNTIL 4PM CDT...

AT 1225 PM CDT A LINE OF STRONG THUNDERSTORMS EXTENDED FROM 10 MILES
SOUTH OF GRAND FORKS NORTH DAKOTA SOUTHWEST TO NEAR TOWER CITY NORTH
DAKOTA. THE STRONGEST THUNDERSTORMS WERE LOCATED NEAR GALESBURG IN
TRAILL COUNTY AND JUST EAST OF TOWER CITY IN CASS COUNTY. THESE
THUNDERSTORMS WERE MOVING EAST AT 25 MPH AND WILL BE OVER EASTERN
TRAILL COUNTY AND MOVING INTO THE FARGO NORTH DAKOTA AREA BY 1PM CDT.

THESE THUNDERSTORMS COULD PRODUCE VERY HEAVY RAIN...HAIL...GUSTY WINDS
AND FREQUENT DANGEROUS LIGHTNING STRIKES.

OTHER SHOWERS AND THUNDERSTORMS CONTINUED OVER EAST CENTRAL...NORTHEAST
AND SOUTHEAST NORTH DAKOTA AND NORTHWEST MINNESOTA. ALL OF THESE
THUNDERSTORMS WERE MOVING NORTHEAST AT 25 TO 30 MPH.

PERSONS NEAR ANY OF THESE THUNDERSTORMS AND IN THE WATCH AREA SHOULD
REMAIN ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS.

STAY TUNED TO NO&AA WEATHER RADIO OR YOUR FAVORITE MEDIA OUTLET FOR FURTHER
INFORMATION ABOUT THESE STORMS.
ANDERSEN

Special weather statement, Sep 11, 1:25 PM CDT, 1 hour 57 minutes before

NDZ007-008-016-026>030-038-039-048-049-051>053-MNZ001>004-
007>009-013>017-022>024-027>032-039>041-047-111930-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
125 PM CDT SUN SEP 11 1994

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR MUCH OF EASTERN NORTH
DAKOTA AND PART OF NORTHWEST MINNESOTA UNTIL 4PM CDT...

AT 125 PM CDT AN AREA OF STRONG THUNDERSTORMS EXTENDED FROM JUST SOUTH
OF THE THIEF RIVER FALLS MINNESOTA AREA SOUTHWEST TO JUST SOUTH OF
JAMESTOWN NORTH DAKOTA WITH THE STRONGEST THUNDERESTORM LOCATED NORTH
OF TOWER CITY NORTH DAKOTA. THESE THUNDERSTORMS WERE MOVING EAST
NORTHEAST AT 25 TO 30 MPH AND WILL MOVE THROUGH THE ADA AND MAHNOMEN
MINNESOTA AREAS AND OVER NORTHERN CASS COUNTY OF NORTH DAKOTA BY 2PM.

THESE THUNDERSTORMS COULD PRODUCE VERY HEAVY RAIN...HAIL...GUSTY WINDS
AND FREQUENT DANGEROUS LIGHTNING STRIKES.

OTHER SHOWERS AND THUNDERSTORMS CONTINUED OVER EAST CENTRAL...NORTHEAST
AND SOUTHEAST NORTH DAKOTA AND NORTHWEST MINNESOTA. ALL OF THESE
THUNDERSTORMS WERE MOVING NORTHEAST AT 25 TO 30 MPH.

PERSONS NEAR ANY OF THESE THUNDERSTORMS AND IN THE WATCH AREA SHOULD
REMAIN ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS.

STAY TUNED TO NOAA WEATHER RADIO OR YOUR FAVORITE MEDIA OUTLET FOR FURTHER
INFORMATION ABOUT THESE STORMS.
ANDERSEN

Special weather statement, Sep 11, 1:38 PM CDT, 1 hour 44 minutes before

NDZ007-008-016-026>030-038-039-048-049-051>053-MNZ001>004-
007>009-013>017-022>024-027>032-039>041-047-111930-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
125 PM CDT SUN SEP 11 1994

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR MUCH OF EASTERN NORTH
DAKOTA AND PART OF NORTHWEST MINNESOTA UNTIL 4PM CDT...

AT 125 PM CDT AN AREA OF STRONG THUNDERSTORMS EXTENDED FROM JUST SOUTH
OF THE THIEF RIVER FALLS MINNESOTA AREA SOUTHWEST TO JUST SOUTH OF
JAMESTOWN NORTH DAKOTA WITH THE STRONGEST THUNDERESTORM LOCATED NORTH
OF TOWER CITY NORTH DAKOTA. THESE THUNDERSTORMS WERE MOVING EAST
NORTHEAST AT 25 TO 30 MPH AND WILL MOVE THROUGH THE ADA AND MAHNOMEN
MINNESOTA AREAS AND OVER NORTHERN CASS COUNTY OF NORTH DAKOTA BY 2PM.

THESE THUNDERSTORMS COULD PRODUCE VERY HEAVY RAIN...HAIL...GUSTY WINDS
AND FREQUENT DANGEROUS LIGHTNING STRIKES.

OTHER SHOWERS AND THUNDERSTORMS CONTINUED OVER EAST CENTRAL...NORTHEAST
AND SOUTHEAST NORTH DAKOTA AND NORTHWEST MINNESOTA. ALL OF THESE
THUNDERSTORMS WERE MOVING NORTHEAST AT 25 TO 30 MPH.

PERSONS NEAR ANY OF THESE THUNDERSTORMS AND IN THE WATCH AREA SHOULD
REMAIN ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS.

STAY TUNED TO NOAA WEATHER RADIO OR YOUR FAVORITE MEDIA OUTLET FOR FURTHER
INFORMATION ABOUT THESE STORMS.
ANDERSEN

Local storm report, Sep 11, 2:35 PM CDT, 47 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
235 PM CDT SUN SEP 11 1994

TIME          EVENT

1250 PM CDT   BARNES COUNTY SHERIFFS DEPARTMENT REPORTED PEA SIZE HAIL
              IN VALLEY CITY.

150 PM CDT    THE ARTHUR NORTH DAKOTA COOPERATIVE OBSERVER REPORTED
              GOLFBALL SIZE HAIL IN NORTHERN CASS COUNTY.

220 PM CDT    THE GRANDIN ND SKYWARN OBSERVER DROVE 4 MILES SOUTHWEST OF
              GARDNER NORTH DAKOTA AND SAW QUARTER SIZE HAIL IN THE
              DITCHES.

JEURISSEN

Local storm report, Sep 11, 2:39 PM CDT, 43 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
235 PM CDT SUN SEP 11 1994

TIME          EVENT

1250 PM CDT   BARNES COUNTY SHERIFFS DEPARTMENT REPORTED PEA SIZE HAIL
              IN VALLEY CITY.

150 PM CDT    THE ARTHUR NORTH DAKOTA COOPERATIVE OBSERVER REPORTED
              GOLFBALL SIZE HAIL IN NORTHERN CASS COUNTY.

220 PM CDT    THE GRANDIN ND SKYWARN OBSERVER DROVE 4 MILES SOUTHWEST OF
              GARDNER NORTH DAKOTA AND SAW QUARTEFR SIZE HAIL IN THE
              DITCHES.

JEURISSEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 11, 2:07 PM CDT	Severe Thunderstorm Warning	FGF	Clay, Norman	68 min
Sep 11, 3:22 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Mahnomen	68 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1994 Every severe thunderstorm warning in 1994

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.