Alert archive / Minnesota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 29, NWS Grand Forks, ND

July 4, 1994Stevens County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 4, 1994, 10:57 PM CDT for Stevens County, Minnesota. It was in force for 33 min.

The area

The counties it named.

The facts

Issued
Jul 4, 1994, 10:57 PM CDT (03:57 UTC)
Expired
Jul 4, 1994, 11:30 PM CDT
In force
33 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

County Stevens County, MN

The nearest sounding before it

Aberdeen, SD (KHON), launched 00:00Z, 4.0 hours before the alert went out and 203 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, Aberdeen, SD at 00:00Z on 1994-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2414 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, Aberdeen, SD at 00:00Z on 1994-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 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
2414 J/kg
Mixed-layer CIN
-67 J/kg
Mixed-layer LCL
1614 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.4
Supercell composite
6.9

Open this sounding in Storm Lab

The text

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

000 
WUUS1 KFAR 050357 RRA
SVRFAR
MNC149-050430-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE FARGO ND
1057 PM CDT MON JUL 4 1994

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1130 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY

   IN THE WEST CENTRAL PART OF MINNESOTA
      STEVENS

AT 1055 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM LOCATED NEAR
MORRIS MINNESOTA IN STEVENS COUNTY. THIS SEVERE THUNDERSTORM WAS
MOVING SOUTHEAST AT 20 MILES AN HOUR.

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.

THIS SLOW MOVING THUNDERSTORM MAY PRODUCE EXTREMELY HEAVY RAIN THAT
CAN QUICKLY FLOOD SMALL STREAMS...LOW LYING AREAS...AND UNDERPASSES.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WERE WATER COVERS THE ROADWAY.
THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED IMMEDIATELY.
MOVE TO HIGH GROUND.
ANDERSEN

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, Jul 4, 8:28 PM CDT, 2 hours 29 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE FARGO ND
825 PM CDT MON JULY 4 1994

TIME      EVENT
758 PM    1/2 TO 3/4 INCH HAIL REPORTED AT LIDGERWOOD NORTH DAKOTA
          ...RICHLAND COUNTY BY WAHPETON ND WARNING POINT.
Local storm report, Jul 4, 8:28 PM CDT, 2 hours 29 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE FARGO ND
825 PM CDT MON JULY 4 1994

TIME      EVENT
758 PM    1/2 TO 3/4 INCH HAIL REPORTED AT LIDGERWOOD NORTH DAKOTA
          ...RICHLAND COUNTY BY WAHPETON ND WARNING POINT.
Local storm report, Jul 4, 9:05 PM CDT, 1 hour 52 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE FARGO ND
905 PM CDT MON JULY 4 1994

TIME      EVENT
845 PM    SOFTBALL SIZED HAIL REPORTED AT 2 MILES EAST OF WYNDMERE
          ND...RICHLAND COUNTY BY WAHPETON ND WARNING POINT.
Local storm report, Jul 4, 9:05 PM CDT, 1 hour 52 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE FARGO ND
905 PM CDT MON JULY 4 1994

TIME      EVENT
845 PM    SOFTBALL SIZED HAIL REPORTED AT 2 MILES EAST OF WYNDMERE
          ND...RICHLAND COUNTY BY WAHPETON ND WARNING POINT.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 4, 8:58 PM CDTSevere Thunderstorm WarningFGFTraverse, Wilkin62 min
Jul 4, 9:56 PM CDTSevere Thunderstorm WarningFGFGrant, Traverse, Wilkin64 min
Jul 4, 10:21 PM CDTSevere Thunderstorm WarningFGFStevens39 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1994Every 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.