Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 129, NWS Twin Cities, MN

September 9, 1990Pepin County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 9, 1990, 5:58 PM CDT for Pepin County, Wisconsin. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
Sep 9, 1990, 5:58 PM CDT (22:58 UTC)
Expired
Sep 9, 1990, 7:00 PM CDT
In force
62 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Pepin County, WI

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, 11.0 hours before the alert went out and 122 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 1990-09-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 95 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 1990-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 141 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
95 J/kg
Mixed-layer CIN
-590 J/kg
Mixed-layer LCL
1481 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
141 m²/s²
0-3 km storm-relative helicity
292 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 092259
SVRMSP
WIC033-091-093-109-100000-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
558 PM CDT SUN SEP 9 1990
 
THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  700 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN WEST CENTRAL WISCONSIN
          ...WESTERN DUNN...WESTERN PEPIN...PIERCE...ST CROIX
 
AT 553 PM RADAR SHOWED A CLUSTER OF SEVERE THUNDERSTORMS ALONG THE ST
CROIX RIVER FROM 20 MILES NORTHEAST OF DOWNTOWN ST PAUL NEAR SOMERSET
EXTENDING TO 20 MILES SOUTHEAST OF DOWNTOWN ST PAUL.
 
THIS STORM PRODUCED QUARTER SIZE HAIL IN OAKDALE AT 515 PM.
 
MOVEMENT WAS EAST AT 25 MILES AN HOUR.
 
NEW RICHMOND AND BALDWIN ARE DIRECTLY IN THE PATH OF THESE STORMS.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 9, 5:04 PM CDTSevere Thunderstorm WarningMPXPierce, Saint Croix56 min
Sep 9, 5:58 PM CDTSevere Thunderstorm WarningMPXDunn, Pierce, Saint Croix62 min
Sep 9, 6:23 PM CDTTornado WarningMPXPierce37 min
Sep 9, 6:53 PM CDTSevere Thunderstorm WarningMPXDunn, Pepin, Pierce67 min
Sep 9, 6:53 PM CDTSevere Thunderstorm WarningMPXSaint Croix67 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 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.