Alert archive / Minnesota / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 117, NWS Twin Cities, MN

September 7, 1990Kandiyohi County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 7, 1990, 4:15 AM CDT for Kandiyohi County, Minnesota. It was in force for 45 min.

The area

The counties it named.

The facts

Issued
Sep 7, 1990, 4:15 AM CDT (09:15 UTC)
Expired
Sep 7, 1990, 5:00 AM CDT
In force
45 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Kandiyohi 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

Minneapolis, MN (KSTC), launched 00:00Z, 9.3 hours before the alert went out and 115 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, Minneapolis, MN at 00:00Z on 1990-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 584 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, Minneapolis, MN at 00:00Z on 1990-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -40 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
584 J/kg
Mixed-layer CIN
-72 J/kg
Mixed-layer LCL
1272 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
-40 m²/s²
0-3 km storm-relative helicity
-1 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 070915
SVRSTC
MNC067-071000-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST CLOUD MN
ISSUED BY MINNEAPOLIS MN
415 AM CDT FRI SEP 7 1990
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  500 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN CENTRAL MINNESOTA
          ...KANDIYOHI
 
AT 415 AM...A SEVERE THUNDERSTORM WAS LOCATED NEAR BENSON IN SWIFT
COUNTY OF WEST CENTRAL MINNESOTA...ABOUT 25 MILES SOUTH OF ALEXANDRIA.
THIS SEVERE THUNDERSTORM WAS MOVING TO THE SOUTHEAST AT 50 MILES AN
HOUR AND WILL BE ENTERING NORTHWEST KANDIYOHI COUNTY BY 420 AM. TOWNS
IN THE PATH OF THIS STORM INCLUDE NEW LONDON AND WILMAR. DAMAGING
WINDS AND LARGE HAIL ARE LIKELY WITH THIS SEVERE THUNDERSTORM.
 
 
WHEN THUNDERSTORMS ARE OCCURRING..MOVE INSIDE A STRONG BUILDING
DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES OR ELECTRICAL
APPLIANCES UNLESS IN AN EMERGENCY. REMEMBER SEVERE THUNDERSTORMS
CAN AND OCCASIONALLY DO PRODUCE TORNADOS WITH LITTLE OR NO WARNING.
DOMBROWSKY

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 7, 3:52 AM CDTSevere Thunderstorm WarningMPXPope, Swift43 min
Sep 7, 4:53 AM CDTSevere Thunderstorm WarningMPXStearns67 min
Sep 7, 5:05 AM CDTSevere Thunderstorm WarningMPXKandiyohi, Meeker55 min
Sep 7, 6:14 AM CDTSevere Thunderstorm WarningMPXSibley31 min
Sep 7, 6:32 AM CDTSevere Thunderstorm WarningMPXLe Sueur, Nicollet28 min
Sep 7, 7:23 AM CDTSevere Thunderstorm WarningMPXBlue Earth, Waseca37 min
Sep 7, 3:36 PM CDTSevere Thunderstorm WarningMPXMartin39 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.