Alert archive / Iowa / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 32, NWS Des Moines, IA

June 5, 1990Kossuth County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 5, 1990, 3:21 AM CDT for Kossuth County, Iowa. It was in force for 39 min.

The area

The counties it named.

The facts

Issued
Jun 5, 1990, 3:21 AM CDT (08:21 UTC)
Expired
Jun 5, 1990, 4:00 AM CDT
In force
39 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Kossuth County, IA

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, 8.4 hours before the alert went out and 189 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 1990-06-05Temperature 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 1990-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 square meters per square second.1939587897Sfc1 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
1422 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
187 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 KDSM 050821
SVRDSM
IAC109-050900-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE DES MOINES IA
321 AM CDT TUE JUN 5 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 400 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY

   IN THE NORTH CENTRAL PART OF IOWA
      KOSSUTH

AT 315 AM CDT SEVERAL SEVERE THUNDERSTORMS WERE MOVING INTO THE
WESTERN PART OF KOSSUTH COUNTY IN NORTH CENTRAL IOWA.

THESE STORMS WERE MOVING AT 40 TO 45 MILES AN HOUR AND SHOULD BE
THROUGH THE COUNTY BY 345 AM CDT.  HIGH WINDS OF AROUND 60 MILES
AN HOUR HAVE BEEN REPORTED WITH THESE STORMS.
CITIES AFFECTED BY THE WARNING INCLUDE BANCROFT AND ALGONA...BOTH
ABOUT 50 MILES WEST OF MASON CITY IOWA.

REMEMBER...SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 60 MILES
AN HOUR...LARGE HAIL...DANGEROUS LIGHTNING...AND VERY HEAVY RAINS.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOU HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT
DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

FORSTER

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 5, 1:34 AM CDT, 1 hour 47 minutes before
IAZALL-050735-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
135 AM CDT TUE JUN 5 1990

AT 125 AM CDT...SHOWERS AND THUNDERSTORMS CONTINUED TO SPREAD INTO
NORTHWEST AND WEST CENTRAL IOWA...FROM SOUTHEAST SOUTH DAKOTA...
WITH SOME OF THE STORMS PRODUCING WIND GUSTS TO AROUND 60 MILES AN
HOUR...ALONG WITH SOME SMALL HAIL.

THE AREA OF SHOWERS AND STORMS WAS ABOUT 60 MILES WIDE...CENTERED
FROM THE IOWA/SOUTH DAKO_TA BORDER 50 MILES NORTH OF SIOUX CITY...TO
60 MILES WEST OF DES MOINES.

THE SHOWERS AND STORMS WERE SPREADING SOUTHEAST AT 35 MILES AN HOUR.

SHOULD THREATENING WEATHER APPROACH...PEOPLE IN THE PATH SHOULD SEEK
SHELTER IMMEDIATELY.

WPM
Special weather statement, Jun 5, 2:36 AM CDT, 45 minutes before
IAZALL-050835-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
235 AM CDT TUE JUN 5 1990

...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR A SMALL PORTION
OF EXTREME NORTHWEST IOWA UNTIL 7AM THIS TUESDAY MORNING...

AT 225 AM CDT...SHOWERS AND THUNDERSTORMS CONTINUED TO SPREAD ACROSS
NORTHWEST AND WEST CENTRAL AND CENTRAL IOWA.

THE AREA OF NUMEROUS SHOWERS AND STRONG THUNDERSTORMS WAS 60 MILES
WIDE...CENTERED FROM THE NORTHWEST CORNER OF IOWA...TO ABOUT 40
MILES WEST OF DES MOINES.

THE STRONGEST THUNDERSTORMS CONTINUED OVER THE EXTREME NORTHWEST AREAS
OF IOWA...AND WERE MOVING RAPIDLY EAST AT AROUND 45 MILES AN HOUR.{{}
SHOULD THREATENING STORMS APPROACH...BE PREPARED TO SEEK SHELTER
IMMEDIATELY.{{}
WPM

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 5, 4:24 AM CDTSevere Thunderstorm WarningDMXClay, Dickinson36 min
Jun 5, 4:53 AM CDTSevere Thunderstorm WarningDMXBuena Vista37 min
Jun 5, 5:22 AM CDTSevere Thunderstorm WarningDMXCalhoun, Pocahontas, Sac53 min
Jun 5, 6:27 AM CDTSevere Thunderstorm WarningDMXCalhoun, Webster63 min
Jun 5, 8:57 AM CDTSevere Thunderstorm WarningDMXHardin43 min
Jun 5, 9:00 AM CDTSevere Thunderstorm WarningDMXFranklin25 min
Jun 5, 9:00 AM CDTSevere Thunderstorm WarningDMXButler45 min

Nearby

Severe Thunderstorm Warnings in Iowa, 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.