Alert archive / Minnesota / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 13, NWS Grand Forks, ND

July 5, 1989Lake of the Woods County, Roseau County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 5, 1989, 7:30 PM CDT for Lake of the Woods County, Roseau County, Minnesota. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Jul 5, 1989, 7:30 PM CDT (00:30 UTC)
Expired
Jul 5, 1989, 8:30 PM CDT
In force
60 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

Counties Lake of the Woods County, MN, Roseau 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, 0.5 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 00:00Z on 1989-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2593 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 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 1989-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 96 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
2593 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
1454 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
96 m²/s²
0-3 km storm-relative helicity
132 m²/s²
Significant tornado parameter
1.5
Supercell composite
7.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KINL 060032 COR
SVRINL
MNC135-077-060130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INTERNATIONAL FALLS MN
730 PM CDT WED JUL 5 1989

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 0830 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...

IN NORTHWESTERN  MINNESOTA ...
   ROSEAU..LAKE OF THE WOODS

AT 710 PM THIS EVENING ROSEAU POLIECE REPORTED SEVERE THUNDERSTORMS
AND 1 INCH HAIL OCCURING. STRONG WINDS WERE ALSO NOTED. MOVEMENT OF
THE STORM WAS NORTHEAST AT 30 MPH. CITIES IN EASTERN ROSEAU AND
NORTHERN LAKE OF THE WOODS SHOULD BE PREPARED FOR HEAVY WEATHER.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND... DESTRUCTIVE
HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. WHEN THUNDERSTORMS ARE
OCCURRING..MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DO
NOT USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY.
REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOS.

HOUSE

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 5, 6:38 PM CDT, 52 minutes before
SPECIAL WEATHER STATEMENT QND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
625 PM CDT WED JUL 5 1989

...THUNDERSTORMS DEVELOPING RAPIDLY OVER NORTHWEST MINNESOTA...

AT 625 PM AN INTENSE THUNDERSTORM WAS LOCATED OVER THE NORTHWEST
CORNER OF BELTRAMI COUNTY OF NORTHWEST MINNESOTA..30 MILES
NORTHEAST OF THIEF RIVER FALLS MINNESOTA. THIS THUNDERSTORM WAS
MOVEING NORTHEAST AT 30 MILES AN HOUR AND COULD PRODUCE BRIEF
HEAVY RAIN..HAIL AND GUSTY WINDS. THIS THUNDERSTORM WILL PASS
INTO LAKE OF THE WOODS COUNTY BY 7 PM.

SEVERAL OTHER INTENSE THUNDERSTORMS WERE LOCATED OVER TRAIL
COUNTY OF NORTHEAST NORTH DAKOTA AND SOUTHWEST POLK COUNTY OF
NORTHWEST MINNESOTA AND WERE MOVING NORTHEAST AT 30 MILES AN HOUR
AND WILL BE IN THE CROOKSTON MINNESOTA AREA BY 645 PM. THESE
THUNDERSTORMS COULD ALSO PRODUCE HEAVY RAIN..HAIL AND GUSTY
WINDS.
OTHER THUNDERSTORMS AND RAIN SHOWERS CONTINUED OVER NORTHWEST
MINNESOTA.

PERSONS NEAR THESE THUNDERSTORMS SHOULD REMAIN ALERT FOR RAPIDLY
CHANGING WEATHER CONDITIONS AND BE PREPARTED TO SEEK SHELTER
IF NECESSARY.

PLEASE STAY TUNED TO YOUR LOCAL RADIO AND TV STATIONS AS WELL
AS NOAA WEATHER RADIO FOR LATEST INFORMATION ON THESE INTENSE
THUNDERSTORMS.
ANDERSEN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 5, 8:04 PM CDTSevere Thunderstorm WarningFGFMarshall56 min
Jul 5, 9:20 PM CDTSevere Thunderstorm WarningFGFKoochiching70 min
Jul 5, 10:30 PM CDTSevere Thunderstorm WarningFGFBeltrami, Clearwater60 min
Jul 5, 10:30 PM CDTSevere Thunderstorm WarningFGFKoochiching60 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1989Every severe thunderstorm warning in 1989

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.