Alert archive / Minnesota / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 91, NWS Twin Cities, MN

July 25, 1990Anoka County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 25, 1990, 4:05 PM CDT for Anoka County, Minnesota. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
Jul 25, 1990, 4:05 PM CDT (21:05 UTC)
Expired
Jul 25, 1990, 5:00 PM CDT
In force
55 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Anoka 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 12:00Z, 9.1 hours before the alert went out and 55 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 12:00Z on 1990-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 28 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 12:00Z on 1990-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 135 square meters per square second.193958Sfc1 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
28 J/kg
Mixed-layer CIN
-145 J/kg
Mixed-layer LCL
696 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
135 m²/s²
0-3 km storm-relative helicity
139 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 252105
SVRMSP
MNC003-053-252200-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
405 PM CDT WED JUL 25 1990
 
THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  500 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN EAST CENTRAL MINNESOTA
          ...ANOKA...NORTHERN HENNEPIN
 
AT 4 00 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM NEAR BROOKLYN
PARK...8 MILES NORTHWEST OF DOWNTOWN MINNEAPOLIS. THIS STORM WAS
MOVING NORTH NORTHEAST AT 20 MILES AN HOUR.
 
COMMUNITIES INCLUDED IN THE WARNING ARE...MAPLE
GROVE...CHAMPLIN...ANOKA...AND ANDOVER.
 
WHEN THUNDERSTORMS ARE OCCURRING..MOVE INSI'DE 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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 4:05 PM CDTSevere Thunderstorm WarningMPXHennepin43 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.