Alert archive / Minnesota / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 22, NWS Grand Forks, ND

July 2, 1990Marshall County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 2, 1990, 11:12 PM CDT for Marshall County, Minnesota. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
Jul 2, 1990, 11:12 PM CDT (04:12 UTC)
Expired
Jul 3, 1990, 12:15 AM CDT
In force
63 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

County Marshall County, MN

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 4.2 hours before the alert went out and 227 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 00:00Z on 1990-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1868 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 00:00Z on 1990-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 214 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
1868 J/kg
Mixed-layer CIN
-156 J/kg
Mixed-layer LCL
1238 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
214 m²/s²
0-3 km storm-relative helicity
286 m²/s²
Significant tornado parameter
0.6
Supercell composite
5.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFAR 030412
SVRFAR
MNC089-030515-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE FARGO ND
1112 PM CDT MON JUL 2 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1215 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY

   IN THE NORTHWEST PART OF MINNESOTA
      EASTERN MARSHALL

AT 11 PM CDT A SEVERE THUNDERSTORM WAS LOCATED OVER STRANDQUIST
IN NORTH CENTRAL MARSHALL COUNTY OF NORTHWEST MINNESOTA. THIS
THUNDERSTORM WAS MOVING SOUTHEAST AT 35 MILES AN HOUR AND WILL
BE OVER THE AGAISIZ REFUGE OF EASTERN MARSHALL COUNTY BY
MIDNIGHT. THIS THUNDERSTORM HAS A HISTORY OF VERY HEAVY RAIN....
STORNG WINDS AND FREQUENT LIGHTNING STRIKES.

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.  HEAVY RAIN MAY FLOOD ROADWAYS QUICKLY
...AVOID DRIVING INTO AREAS WHERE WATER COVERS THE ROAD.

THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH...PREPARE FOR
DAMAGING WINDS...LARGE HAIL...AND DEADLY LIGHTNING.  PEOPLE OUTSIDE
SHOULD MOVE TO SHELTER...PREFERABLY INSIDE A STRONG BUILDING.  ONCE
INSIDE...STAY AWAY FROM WINDOWS.

THIS SLOW MOVING THUNDERSTORM MAY CAUSE FLOODING OF SMALL STREAMS
AND UNDERPASSES.  MOTORISTS SHOULD AVOID DRIVING INTO AREAS WHERE
WATER COVERS THE ROAD.

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

Special weather statement, Jul 2, 10:12 PM CDT, 1 hour before
NDZ012-013-014-015-016-017-018-MNZ001-006-007-030400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FARGO ND
1000PM CDT MON JUL 2 1990

...STRONG THUNDERSTORMS EXPLODE IN THE NORTH END OF THE RED RIVER
VALLEY OF THE NORTH...
AT 1000 PM CDT SEVERAL STRONG THUNDERSTORMS HAVE EXPLODED IN EAST
PEMBINA AND EAST WALSH COUNTIES IN NORTHEAST NORTH DAKOTA AND KITTSON
COUNTY IN NORTHWEST MINNESOTA.

REPORTS OF TORRENTIAL DOWNPOURS OF RAIN...VERY FREQUENT LIGHTNING STRIKES
AND WIND GUSTS TO 40 MILES AN HOUR HAVE BEEN RECEIVED FROM A HAM RADIO
OPERATOR IN HALLOCK MINNESOTA.

THESE STORMS WERE MOVING AND BUILDING SOUTHEAST AT 35 TO 40 MILES AN HOUR.

PEOPLE IN THE NORTH END OF THE RED RIVER VALLEY SHOULD STAY ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS AND IF YOU LIVE NEAR A RIVER OR STREAM
BE PREPARED TO GO TO HIGHER GROUND IF FLOODING OCCURS.

THESE STORMS WILL CONTINUE OVER THE NORTH END OF THE VALLEY UNTIL
THE EARLY MIDNIGHT HOURS.N
BENNETT
Special weather statement, Jul 2, 10:46 PM CDT, 26 minutes before
NDZ-015-016-017-MNZ001-006-030430-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
1031 PM CDT MON JUL 2 1990

...STRONG THUNDERSTORMS CONTINUE TO DUMP TORRENTIAL RAIN OVER THE
NORTH END OF THE RED RIVER VALLEY OF THE NORTH...
AT 1027 PM CDT A CLUSTER OF THUNDERSTORMS WITH VERY HEAVY RAIN WAS
LOCATED OVER KITTSON COUNTY OF NORTHWEST MINNESOTA. THE STORMS WERE
BETWEEN LANCASTER AND LAKE BRONSON...OR ABOUT 25 MILES SOUTHEAST OF
PEMBINA NORTH DAKOTA.

THE COOPERATIVE WEATHER OBSERVER IN PEMBINA NORTH DAKOTA REPORTED
1.25 INCHES OF RAIN AND WIND GUSTS TO 50 MILES AN HOUR WHEN THESE
STORMS PASSED THROUGH. HALLOCK MINNESOTA OBSERVER REPORTED .92 INCH
OF RAIN SINCE 1000 PM...AND GUSTY WIND.

THESE STORMS WILL LIKELY CONTINUE TO PRODUCE VERY HEAVY RAIN...STRONG
GUSTY WIND...DEADLY LIGHTNING STRIKES AND POSSIBLY SOME HAIL.
THESE STORMS WERE MOVING SOUTHEAST AT 35 MILES AN HOUR AND WILL
MOVE INTO MARSHALL COUNTY OF NORTHWEST MINNESOTA BY 1100 PM. SOME
OF THE TOWN THAT WILL BE AFFECT ARE STRANDQUIST...MIDDLE RIVER...
AGASIZ REFUGE...THIEF LAKE REFUGE AND GRYGLA MINNESOTA.

OTHER SHOWERS AND THUNDERSTORMS WILL MOVE SOUTHEAST THROUGH THE
NORTHWEST COUNTIES OF MINNESOTA THROUGH THE EARLY MIDNIGHT HOURS.

PEOPLE IN THE NORTHWEST COUNTIES OF MINNESOTA THAT LIVE NEAR STREAMS
OR RIVERS SHOULD BE ALERT FOR LOW LAND FLOODING AND BE PREPARED TO
GO TO HIGHER GROUND...IF THE NEED ARISES. ALSO...EFFORTS SHOULD lBE MADE
TO PROTECT OUTDOOR PROPERTY FROM HIGH WINDS AND RAIN.
BENNETT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 11:20 PM CDTSevere Thunderstorm WarningFGFLake of the Woods, Roseau115 min
Jul 3, 12:09 AM CDTSevere Thunderstorm WarningFGFBeltrami, Lake of the Woods, Roseau66 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1990Every severe thunderstorm warning in 1990

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.