Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 47, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 12, 1990, 4:02 PM CDT for Dallas County, Iowa. It was in force for 22 min.
The area
The counties it named.
The facts
- Issued
- Jun 12, 1990, 4:02 PM CDT (21:02 UTC)
- Expired
- Jun 12, 1990, 4:24 PM CDT
- In force
- 22 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Dallas 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 12:00Z, 9.0 hours before the alert went out and 198 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
- 3648 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 244 m²/s²
- 0-3 km storm-relative helicity
- 254 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 122102
SVRDSM
IAC049-122145-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
402 PM CDT TUE JUN 12 1990
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 445 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN CENTRAL IOWA
...DALLAS
AT 400 PM CDT...NATIONAL WEATHER SERVICE INDICATED A SEVERE
THUNDERSTORM IN DALLAS COUNTY. THIS STORM WAS MOVING NORTHEAST AT 40
TO 45 MILES AN HOUR.
THIS STORM WAS LOCATED ABOUT 20 TO 30 MILES WEST OF DES MOINES.
THE WARNING INCLUDES THE TOWNS AND CITIES OF ADEL...DALLAS CENTER...
REDFIELD...DE SOTO...AND WAUKEE.
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
DOWD/HUTTONWhat 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 12, 3:17 PM CDT, 45 minutes before
SPECIAL WEATHER STATEMENT AND WEATHER UPDATE FOR IOWA NATIONAL WEATHER SERVICE DES MOINES IA 315 PM CDT TUE JUN 12 1990 AT 305 PM...VERY STRONG THUNDERSTORMS WERE INDICATED IN PART OF WEST CENTRAL AND SOUTHWEST IOWA. THE STORMS WERE MAINLY IN EASTERN CASS AND WESTERN ADAIR COUNTIES...OR ABOUT 45 TO 65 MILES SOUTHWEST OF DES MOINES. OTHER STRONG THUNDERSTORMS WERE DEVELOPING IN NORTH CENTRAL IOWA.... 30 MILES EAST OF MASON CITY. OTHERWISE...SCATTERED SHOWERS AND A FEW THUNDERSTORMS WERE INDICATED FROM NEAR COUNCIL BLUFFS...TO NEAR EAGLE GROVE...45 MILES SOUTHWEST OF MASON CITY. THE SHOWERS AND THUNDERSTORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR. THE OUTLOOK THROUGH 5PM...IS FORD INCREASING SHOWERS AND THUNDERSTORMS ACROSS THE NORTHWEST HALF OF THE STATE. SOME OF THE STORMS COULD BECOME SEVERE BY 5PM...PRODUCING HEAVY RAIN...LARGE HAIL...HIGH WIND AND DANGEROUS CLOUD TO GROUND LIGHTNING. HUTTON
Special weather statement, Jun 12, 3:46 PM CDT, 16 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 344 PM CDT TUE JUN 12 1990 ...A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF IOWA UNTIL 10 PM THIS TUESDAY EVENING... AT 310 PM...70 MILE AN HOUR WINDS WERE REPORTED AT ANITA...LOCATED ABOUT 60 MLES WEST OF DES MOINES. AT 330 PM...VERY STRONG THUNDERSTORMS CONTINUED OVER SOUTHWEST IOWA... IN A 25 MILE WIDE AREA...BETWEEN GUTHRIE CENTER AND CUMBERLAND...OR FROM 45 MILES WEST...THROUGH 65 MILES SOUTHWEST OF DES MOINES. THESE STORMS HAVE BEEN PRODUCING BRIEF VERY HEAVY RAINFALL...FREQUENT DANGEROUS LIGHTNING...AND STRONG GUSTY WIND...AND COULD ALSO PRODUCE SOME HAIL AS THEY MOVE NORTHEAST AT 45 MILES AN HOUR. PEOPLE IN THE PATH OF THESE STRONG THUNDERSTORMS SHOULD BE PREPARED TO SEEK SHELTER IMMEDIATELY SHOULD THREATENING WEATHER APPROACH. . OVER THE REMAINDER OF IOWA...SCATTERED THUNDERSTORMS CONTINUED IN A 40 MILE WIDE BAND...EXTENDING FROM ABOUTp THE NORTHEAST CORNER OF THE STATE....THROUGH THE SOUTHWEST CORNER OF IOWA. WPM/JAH
Special weather statement, Jun 12, 3:49 PM CDT, 13 minutes before
IA002-003-007-122130
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WATERLOO IA
345 PM CDT TUE JUN 12 1990
...TORNADO WATCH FOR NORTHEAST IOWA UNTIL 10PM CDT...
AT 340 PM CDT NUMEROUS SHOWERS AND THUNDERSTORMS WERE OVER NORTHEAST
IOWA...WITH THE STRONGEST STORMS IN HOWARD COUNTY NEAR CRESCO. OTHER
SHOWERS AND THUNDERSTORMS WERE SCATTERED FROM THE MINNESOTA BORDER
THROUGH CHARLES CITY AND TO HAMPTON...OR 35 MILES NORTHWEST OF WATERLOO.s
THE SHOWERS AND STORMS WERE MOVING TO THE NORTHEAST AT 25 MILES AN HOUR.
OTHER THUNDERSTORMS CONTINUED TO DEVELOP TO THE SOUTHWEST OF DES MOINES
AND WERE ALSO MOVING TO THE NORTHEAST.
COLLARThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 3:44 PM CDT | Tornado Warning | DMX | Adair | 22 min |
| Jun 12, 5:06 PM CDT | Severe Thunderstorm Warning | DMX | Bremer | 39 min |
| Jun 12, 5:18 PM CDT | Severe Thunderstorm Warning | DMX | Chickasaw | 42 min |
| Jun 12, 5:18 PM CDT | Severe Thunderstorm Warning | DMX | Fayette | 27 min |
| Jun 12, 6:06 PM CDT | Severe Thunderstorm Warning | DMX | Benton | 19 min |
| Jun 12, 6:16 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Hamilton, Webster | 44 min |
| Jun 12, 6:45 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton | 30 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.