Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 33, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 5, 1990, 4:24 AM CDT for Clay County, Dickinson County, Iowa. It was in force for 36 min.
The area
The counties it named.
The facts
- Issued
- Jun 5, 1990, 4:24 AM CDT (09:24 UTC)
- Expired
- Jun 5, 1990, 5:00 AM CDT
- In force
- 36 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Clay County, IA, Dickinson 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, 9.4 hours before the alert went out and 219 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.
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDSM 050924
SVRDSM
IAC041-059-051000-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
424 AM CDT TUE JUN 5 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 500 AM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE NORTHWEST PART OF IOWA
CLAY...DICKINSON
AT 420 AM CDT RAPIDLY DEVELOPING SEVERE THUNDERSTORMS WERE MOVING
INTO CLAY AND DICKINSON COUNTIES IN NORTHWEST IOWA. THE HISTORY
OF THESE STORMS HAS BEEN BRIEF HEAVY RAINS SMALL HAIL AND STRONG
GUSTY SURFACE WINDS NEAR 60 MILES AN HOUR.
CITIES IN THE WARNING INCLUDE SPENCER IN CLAY COUNTY...AND SPIRIT
LAKE AND THE IOWA GREAT LAKES AREA SOME 20 MILES NORTH OF SPENCER
IN DICKINSON COUNTY.
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.
FORSTERWhat 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, 2 hours 50 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, 1 hour 48 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.{{}
WPMSpecial weather statement, Jun 5, 3:33 AM CDT, 51 minutes before
IAZALL-050935- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 333 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 325 AM CDT...SCATTERED SHOWERS AND ISOLATED STRONG THUNDERSTORMS CONTINUED TO MOVE ACROSS NORTHWEST...INTO NORTH CENTRAL IOWA. THE STRONG THUNDERSTORMS OVER NORTHWEST AND NORTH CENTRAL IOWA... ALONG WITH BRIEF VERY HEAVY RAINS...COULD PRODUCE STRONG GUSTY WIND AND POSSIBLY SOME SMALL HAIL AS THEY MOVE RAPIDLY EAST AT AROUND 45 MILES AN HOUR. SHOULD THREATENING WEATHER APPROACH...PEOPLE IN THEIR PATH SHOULD BE PREPARED TO SEEK SHELTER IMMEDIATELY. THE ENTIRE AREA OF SHOWERS AND STORMS WAS 90 MILES WIDE...CENTERED FROM 45 MILES SOUTHWEST OF MASON CITY...TO NEAR JUST EAST OF SIOUX CITY. THE STRONGEST STORMS SHOULD BE IN THE MASON CITY...CLEAR LAKE AREA BETWEEN 4 AND 430 AM. WPM
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 5, 3:21 AM CDT | Severe Thunderstorm Warning | DMX | Kossuth | 39 min |
| Jun 5, 4:53 AM CDT | Severe Thunderstorm Warning | DMX | Buena Vista | 37 min |
| Jun 5, 5:22 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Pocahontas, Sac | 53 min |
| Jun 5, 6:27 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Webster | 63 min |
| Jun 5, 8:57 AM CDT | Severe Thunderstorm Warning | DMX | Hardin | 43 min |
| Jun 5, 9:00 AM CDT | Severe Thunderstorm Warning | DMX | Franklin | 25 min |
| Jun 5, 9:00 AM CDT | Severe Thunderstorm Warning | DMX | Butler | 45 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.