Alert archive / Minnesota / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 18, NWS Twin Cities, MN

May 22, 1990Blue Earth County, Martin County, Watonwan County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 22, 1990, 7:52 PM CDT for Blue Earth County, Martin County, Watonwan County, Minnesota. It was in force for 68 min.

The area

The counties it named.

The facts

Issued
May 22, 1990, 7:52 PM CDT (00:52 UTC)
Expired
May 22, 1990, 9:00 PM CDT
In force
68 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Blue Earth County, MN, Martin County, MN, Watonwan 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, 0.9 hours before the alert went out and 124 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 1990-05-23Temperature 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 00:00Z on 1990-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 215 square meters per square second.1939587897117Sfc1 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
832 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
215 m²/s²
0-3 km storm-relative helicity
244 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 230052
SVRRST
MNC165-091-013-230200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE ROCHESTER MN
752 PM CDT TUE MAY 22 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 900 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE SOUTH CENTRAL PART OF MINNESOTA
      EASTERN WATONWAN...EASTERN MARTIN...SOUTHWEST BLUE EARTH

THIS WARNING INCLUDES THE CITIES OF MADELIA...ST JAMES AND FAIRMONT.

AT 745 PM RADAR INDICATED A SEVERE THUNDERSTORM 25 MILES SOUTHWEST
OF MANKATO NEAR MADELIA MOVING SOUTH AT 25-30 MPH.

AT 745 PM MARBLE SIZE HAIL WAS REPORTED AT MADELIA.

IF YOU ARE IN AN AREA THREATENED BY THE STORM...GO TO A REINFORCED
SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY
RAIN...AND LIGHTNING.

BUSS

The office that day

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

IssuedProductOfficeCountiesLasted
May 22, 8:05 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Martin, Watonwan40 min
May 22, 8:12 PM CDTSevere Thunderstorm WarningMPXLac qui Parle, Yellow Medicine48 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.