Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 35, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 5, 1990, 5:22 AM CDT for Calhoun County, Pocahontas County, Sac County, Iowa. It was in force for 53 min.
The area
The counties it named.
The facts
- Issued
- Jun 5, 1990, 5:22 AM CDT (10:22 UTC)
- Expired
- Jun 5, 1990, 6:15 AM CDT
- In force
- 53 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Calhoun County, IA, Pocahontas County, IA, Sac 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
Omaha, NE (KOAX), launched 00:00Z, 10.4 hours before the alert went out and 184 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
- 3602 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 161 m²/s²
- 0-3 km storm-relative helicity
- 492 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 051022
SVRDSM
IAC161-025-151-051115-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
522 AM CDT TUE JUN 5 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 615 AM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE WEST CENTRAL PART OF IOWA
NORTHEAST SAC...CALHOUN...
IN THE NORTHWEST PART OF IOWA
SOUTHWEST POCAHONTAS...
AT 151 AM CDT A SEVER THUNDERSTORM WAS MOVING SOUTHEAST AROUND 30
MILE AN HOUR INTO PARTS OF SAC..POCAHONTAS AND CALHOUN COUNTIES.
CITIES IN THE WARNING INCLUDE SAC CITY...40 MILES WEST OF FORT
DODGE...ROCKWELL CITY...30 MILES WEST OF FORT DODGE AND FONDA
ABOUT 40 MILES NORTHWEST OF FORT DODGE IN POCAHONTAS COUNTY.
THESE STORM HAVE BEEN PRODUCING HAIL...BRIEF HEAVY RAINS AND
STRONG GUSTY SURFACE WINDS.
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, 3 hours 48 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, 2 hours 46 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, 1 hour 49 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
Special weather statement, Jun 5, 4:36 AM CDT, 46 minutes before
IAZALL-051035- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 435 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 425 AM CDT...SCATTERED SHOWERS AND ISOLATED STRONG THUNDERSTORMS CONTINUED TO MOVE ACROSS THE NORTH HALF OF IOWA. THE STRONG THUNDERSTORMS OVER NORTHWEST AND NORTH CENTRAL IOWA... ALONG WITH BRIEF VERY HEAVY RAINS...COULD ALSO PRODUCE BRIEF STRONG GUSTY WIND...AND POSSIBLY SOME SMALL HAIL AS THEY MOVE RAPIDSLY EAST AT AROUND 50 MILES AN HOUR. SHOULD THREATENING WEATHER APPROACH...PEOPLE IN THEIR PATH SHOULD BE PREPARED TO SEEK SHELTER IMMEDIATELY. THE STRONGEST STORMS WERE LOCATED JUST SOUTH OF MASON CITY...AND NEAR SPIRIT LAKE THROUGH ABOUT 10 MILES SOUTH OF SPENCER...OR FROM ABOUT 70 MILES NORTHEAST...THROUGH 100 MILES NORTHEAST OF SIOUX CITY. WPM
Special weather statement, Jun 5, 4:43 AM CDT, 39 minutes before
IA002-003-007-051100 SPECIAL WEATHER STATEMENT AND WEATHER UPDATE FOR NORTHEAST IOWA NATIONAL WEATHER SERVICE WATERLOO IA 435 PM CDT TUE JUN 5 1990 AT 435 AM CDT WEATHER RADAR INDICATED THUNDERSTORMS WITH HEAVY RAINS...STRONG WINDS...AND SMALL HAIL MOVING INTO FLOYD AND MITCHELL COUNTIES...25 MILES EAST OF MASON CITY. THE STORMS WERE MOVING TO THE EAST AT 40 TO 45 MILES AN HOUR. OTHER STORMS WERE OCCURING IN FRANKLIN COUNTY AND EXTREME NORTHWEST BUTLER AND BLACK HAWK COUNTIES. THESE THUNDERSTORMS WILL BE MOVING INTO THE INDEPENDENCE...WATERLOO...OELWEIN...AND WEST UNION AREAS WITHIN THE HOUR. TEMPERATURES OVER THE AREA WERE IN THE 50S UNDER PARTLY CLOUDY SKIES. COLLAR/ROBB
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, 4:24 AM CDT | Severe Thunderstorm Warning | DMX | Clay, Dickinson | 36 min |
| Jun 5, 4:53 AM CDT | Severe Thunderstorm Warning | DMX | Buena Vista | 37 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.