Alert archive / Minnesota / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 124, NWS Twin Cities, MN

September 9, 1990Mille Lacs County, Morrison County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 9, 1990, 4:37 AM CDT for Mille Lacs County, Morrison County, Minnesota. It was in force for 68 min.

The area

The counties it named.

The facts

Issued
Sep 9, 1990, 4:37 AM CDT (09:37 UTC)
Expired
Sep 9, 1990, 5:45 AM CDT
In force
68 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Mille Lacs County, MN, Morrison 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, 9.6 hours before the alert went out and 128 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 1990-09-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 84 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 1990-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 square meters per square second.1939Sfc1 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
84 J/kg
Mixed-layer CIN
-279 J/kg
Mixed-layer LCL
1071 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 090938
SVRSTC
MNC095-097-091045-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST CLOUD MN
ISSUED BY MINNEAPOLIS MN
437 AM CDT SUN SEP 9 1990
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  545 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN EAST CENTRAL MINNESOTA
          ...NORTHERN MILLE LACS
IN CENTRAL MINNESOTA
          ...EASTERN MORRISON
 
AT 433 AM...A SEVERE THUNDERSTORM WAS LOCATED NEAR PIERZ IN MORRISON
COUNTY OF CENTRAL MINNESOTA...ABOUT 25 MILES NORTH OF ST CLOUD.
MOVEMENT WAS TO THE SOUTHEAST AT 30 MILES AN HOUR. CITIES IN THE PATH
OF THIS STORM INCLUDE HILLMAN...ONAMIA...AND PAGE. THIS INCLUDES THE
SOUTHERN WATERS OF LAKE MILLE LACS. THIS STORM MAY PRODUCE LARGE HAIL
AND DAMAGING WINDS.
 
 
WHEN THUNDERSTORMS ARE OCCURRING..MOVE INSIDE A STRONG BUILDING
DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES OR ELECTRICAL
APPLIANCES UNLESS8 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 9, 5:06 AM CDTSevere Thunderstorm WarningMPXMille Lacs54 min
Sep 9, 5:15 AM CDTSevere Thunderstorm WarningMPXBenton45 min
Sep 9, 5:04 PM CDTSevere Thunderstorm WarningMPXRamsey, Washington56 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.