Alert archive / Minnesota / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 122, NWS Twin Cities, MN

September 7, 1990Blue Earth County, Waseca County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 7, 1990, 7:23 AM CDT for Blue Earth County, Waseca County, Minnesota. It was in force for 37 min.

The area

The counties it named.

The facts

Issued
Sep 7, 1990, 7:23 AM CDT (12:23 UTC)
Expired
Sep 7, 1990, 8:00 AM CDT
In force
37 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Blue Earth County, MN, Waseca 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, 0.4 hours before the alert went out and 93 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 1990-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1990-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 228 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1258 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
228 m²/s²
0-3 km storm-relative helicity
383 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 KRST 071225 RRA
SVRRST
MNC013-161-071300-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
723 AM CDT FRI SEP 7 1990
 
THE NATIONAL WEATHER SERVICE IN ROCHESTER HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  800 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH CENTRAL MINNESOTA
          ...EASTERN BLUE EARTH...WASECA
 
AT 715 AM RADAR INDICATED A SEVERE THUNDERSTORM BETWEEN THE CITIES OF
MANKATO AND ST. CLAIR MOVING TO THE SOUTHEAST AT 50 MPH. THIS SEVERE
THUNDERSTORM WILL REACH THE CITY OF JANESVILLE BY 730AM AND WASECA BY
745AM.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

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, 4:15 AM CDTSevere Thunderstorm WarningMPXKandiyohi45 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, 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.