Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 91, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 19, 1990, 8:11 PM CDT for Jones County, Iowa. It was in force for 49 min.
The area
The counties it named.
The facts
- Issued
- Jun 19, 1990, 8:11 PM CDT (01:11 UTC)
- Expired
- Jun 19, 1990, 9:00 PM CDT
- In force
- 49 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Jones 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
Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.2 hours before the alert went out and 359 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
- 2451 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 214 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 200111
SVRDSM
IAC105-123-200200-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
811 PM CDT TUE JUN 19 1990
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 900 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTHEAST IOWA
...KEOKUK
IN SOUTH CENTRAL IOWA
...EASTERN MAHASKA
AT 808 PM...WEATHER RADAR INDICATED A SEVERE THUNDERSTORM JUST
NORTHEAST OF OSKALOOSA...OR SOME 25 MILES NORTH OF OTTUMWA.
THE STORM WAS MOVING EAST AT 30 MILES AN HOUR...AND WILL BE AFFECTING
THE CITIES OF WHAT CHEER...SIGOURNEY...AND ROSE HILL.
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. MOVE TO THE CENTER OF YOUR
HOUSE...STAY AWAY FROM WINDOWS...AND BE READY TO ACT QUICKLY IF A
TORNADO DEVELOPS.
MA}RTIN/TRUETTWhat 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 19, 6:19 PM CDT, 1 hour 52 minutes before
IAZALL-200000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IOWA 615 PM CDT TUE JUN 19 1990 ...A TORNADO WATCH IS IN EFFECT FOR THE WEST HALF OF IOWA UNTIL 10 PM CDT THIS TUESDAY EVENING... ...A FLASH FLOOD/FLOOD WATCH FOR EAST AND SOUTH IOWA TONIGHT... AT 610 PM CDT...ISOLATED VERY STRONG THUNDERSTORMS WERE LOCATED SOUTHWEST THROUGH NORTHWEST OF DES MOINES. THE STRONGEST STORM WAS LOCATED NEAR ADEL...OR ABOUT 15 MILES WEST OF DES MOINES. THIS STORM SHOULD ENTER THE DES MOINES METRO AREA BETWEEN 630 AM 7PM. THERE WERE ALSO RAPIDLY DEVELOPING STORMS SOUTHWEST THROUGH SOUTH OF DES MOINES...IN ABOUT A 10 MILE WIDE AREA...FROM JUST NORTHEAST OF GREENFIELD...TO JUST WEST OF INDIANOLA. . THESE STORMS WERE PRODUCING VERY LARGE AMOUNTS OF RAINFALL... FREQUENT DANGEROUS LIGHTNING...AND COULD PRODUCE BRIEF STRONG GUSTY WIND. ALL THE STORMS WERE MOVING EAST SOUTHEAST AT 20 TO 25 MILES AN HOUR. WPM/CAB
Special weather statement, Jun 19, 6:23 PM CDT, 1 hour 48 minutes before
SDZ018-200000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 625 PM CDT TUE JUN 19 1990 ...TORNADO WATCH CONTINUES FOR MUCH OF THE WESTERN HALF OF IOWA UNTIL 10 PM... ALTHOUGH THUNDERSTORMS HAVE BEEN SLOW TO FORM DURING THE AFTERNOON AND EARLY EVENING...WEATHER PARAMETERS CONTINUE TO POINT TO THE POTENTIAL FOR RAPID SEVERE WEATHER DEVELOPMENT...ESPECIALLY OVER SOUTHWEST AND SOUTH CENTRAL IOWA. PEOPLE IN THE WESTERN HALF OF IOWA SHOULD CONTINUE TO CAREFULLY MONITOR THE WEATHER DURING THE EVENING. HOWEVER...IT APPEARS THE EXTREME NORTHWEST COUNTIES HAVE ESCAPED THE SEVERE WEATHER THREAT...AND LYON AND SIOUX COUNTIES ARE NO LONGER IN THE WATCH. TRUETT
Special weather statement, Jun 19, 6:42 PM CDT, 1 hour 29 minutes before
IAZALL-200030- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 640 PM CDT TUE JUN 19 1990 ...A TORNADO WATCH IS IN EFFECT FOR THE WEST HALF OF IOWA UNTIL 10 PM CDT THIS TUESDAY EVENING... ...A FLASH FLOOD/FLOOD WATCH FOR EAST AND SOUTH IOWA TONIGHT... AT 631 PM CDT...AN INTENSE STORM WAS LOCATED JUST NORTHWEST OF WINTERSET...OR ABOUT 25 MILES NORTHWEST OF WINTERSET. THIS STORM WAS PRODUCING EXTREMELY HEAVY RAINFALL...FREQUENT DANGEROUS LIGHTNING...AND COULD ALSO PRODUCE STRONG GUSTY WIND. SHOULD THREATENING WEATHER APPROACH...PEOPLE IN THIS AREA SHOULD BE PREPARED TO SEEK SHELTER IMMEDIATELY. OVER THE REMAINDER OF CENTRAL IOWA AND SOUTHEAST IOWA...SCATTERED THUNDERSTORMS CONTINUED TO DEVELOP...IN A 35 MILE WIDE AREA... CENTERED FROM 25 MILES NORTH OF OTTUMWA...TO 40 MILES WEST OF DES MOINES. THE STORMS WERE ALL MOVING EAST AT 25 TO 30 MILES AN HOUR. WPM/CAB
Special weather statement, Jun 19, 6:48 PM CDT, 1 hour 23 minutes before
IAZALL-200030- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...COR FIRST PARA... NATIONAL WEATHER SERVICE DES MOINES IOWA 640 PM CDT TUE JUN 19 1990 ...A TORNADO WATCH IS IN EFFECT FOR THE WEST HALF OF IOWA UNTIL 10 PM CDT THIS TUESDAY EVENING... ...A FLASH FLOOD/FLOOD WATCH FOR EAST AND SOUTH IOWA TONIGHT... AT 631 PM CDT...AN INTENSE STORM WAS LOCATED JUST NORTHWEST OF WINTERSET...OR ABOUT 25 MILES SOUTHWEST OF DES MOINES. THIS STORM WAS PRODUCING EXTREMELY HEAVY RAINFALL...FREQUENT DANGEROUS LIGHTNING...AND COULD ALSO PRODUCE STRONG GUSTY WIND. SHOULD THREATENING WEATHER APPROACH...PEOPLE IN THIS AREA SHOULD BE PREPARED TO SEEK SHELTER IMMEDIATELY. OVER THE REMAINDER OF CENTRAL IOWA AND SOUTHEAST IOWA...SCATTERED THUNDERSTORMS CONTINUED TO DEVELOP...IN A 35 MILE WIDE AREA... CENTERED FROM 25 MILES NORTH OF OTTUMWA...TO 40 MILES WEST OF DES MOINES. THE STORMS WERE ALL MOVING EAST AT 25 TO 30 MILES AN HOUR. WPM/CAB
Special weather statement, Jun 19, 7:19 PM CDT, 52 minutes before
IAZALL-200100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IOWA 720 PM CDT TUE JUN 19 1990 ...A TORNADO WATCH IS IN EFFECT FOR THE WEST HALF OF IOWA UNTIL 10 PM CDT THIS TUESDAY EVENING... ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL MIDNIGHT FOR ABOUT THE NORTHEAST ONE QUARTER OF IOWA... ...A FLASH FLOOD/FLOOD WATCH FOR EAST AND SOUTH IOWA TONIGHT... AT 700 PM CDT...SCATTERED INTENSE THUNDERSTORMS CONTINUED IN A 15 MILE WIDE AREA...FROM 25 MILES WEST SOUTHWEST OF DES MOINES TO 15 MILES NORTH OF OTTUMWA. THE MOST INTENSE STORMS WERE LOCATED FROM JUST NORTH OF WINTERSET TO JUST NORTH OF INDIANOLA ...AND JUST NORTHEAST OF OSKALOOSA. ANOTHER INTENSE STORM WAS LOCATED ABOUT 10 MILES NORTHEAST OF DES MOINES. . SHOULD THREATENING WEATHER APPROACH...PEOPLE IN THE PATH OF THESE STORMS SHOULD SEEK SHELTER IMMEDIATELY. THESE STORMS WERE PRODUCING EXCESSIVE RAINFALL...FREQUENT DANGEROUS LIGHTNING...AND COULD PR:ODUCE BRIEF STRONG GUSTY WIND. ALL THE STORMS WERE MOVING EAST AT 25 MILES AN HOUR. WPM
Special weather statement, Jun 19, 7:40 PM CDT, 31 minutes before
IAZALL-200130- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 740 PM CDT TUE JUN 19 1990 ...A TORNADO WATCH IS IN EFFECT FOR THE WEST HALF OF IOWA UNTIL 10 PM CDT THIS TUESDAY EVENING... ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL MIDNIGHT FOR ABOUT THE NORTHEAST ONE QUARTER OF IOWA... ...A FLASH FLOOD/FLOOD WATCH FOR EAST AND SOUTH IOWA TONIGHT... AT 730 PM CDT...SCATTERED INTENSE THUNDERSTORMS CONTINUED IN A 25 MILE WIDE AREA...FROM 15 MILES WEST SOUTHWEST OF DES MOINES TO 15 MILES NORTHEAST OF OTTUMWA. THE MOST INTENSE STORMS WERE LOCATED FROM JUST NORTHWEST OF WINTERSET TO JUST NORTH OF INDIANOLA ...AND JUST NORTH OF OTTUMWA. SEVERAL INTENSE STORMS WERE LOCATED ABOUT 10 MILES NORTHEAST OF DES MOINES...BETWEEN DES MOINES AND NEWTON. . SHOULD THREATENING WEATHER APPROACH...PEOPLE IN THE PATH OF THESE STORMS SHOULD SEEK SHELTER IMMEDIATELY. THESE STORMS WERE PRODUCING EXCESSIVE RWAINFALL...FREQUENT DANGEROUS LIGHTNING...AND COULD PRODUCE BRIEF STRONG GUSTY WIND. ALL THE STORMS WERE MOVING EAST AT 25 MILES AN HOUR. GGF
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 7:04 PM CDT | Flash Flood Warning | DMX | Marion, Warren | 5 hr |
| Jun 19, 7:04 PM CDT | Flash Flood Warning | DMX | Madison | 5 hr |
| Jun 19, 8:05 PM CDT | Flash Flood Warning | DMX | Keokuk, Mahaska | 4 hr |
| Jun 19, 8:05 PM CDT | Flash Flood Warning | DMX | Washington | 4 hr |
| Jun 19, 8:11 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska | 49 min |
| Jun 19, 8:38 PM CDT | Flash Flood Warning | DMX | Appanoose, Davis, Monroe, Wapello | 7 hr |
| Jun 19, 8:38 PM CDT | Flash Flood Warning | DMX | Jefferson, Van Buren | 7 hr |
| Jun 19, 8:45 PM CDT | Tornado Warning | DMX | Marion | 30 min |
| Jun 19, 8:48 PM CDT | Severe Thunderstorm Warning | DMX | Winneshiek | 42 min |
| Jun 19, 9:00 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Union | 45 min |
| Jun 19, 9:12 PM CDT | Severe Thunderstorm Warning | DMX | Decatur, Ringgold | 48 min |
| Jun 19, 9:13 PM CDT | Severe Thunderstorm Warning | DMX | Keokuk, Mahaska | 62 min |
| Jun 19, 9:15 PM CDT | Severe Thunderstorm Warning | DMX | Allamakee | 30 min |
| Jun 19, 9:19 PM CDT | Flash Flood Warning | DMX | Clarke, Decatur, Lucas, Wayne | 5 hr |
| Jun 19, 9:19 PM CDT | Flash Flood Warning | DMX | Ringgold, Union | 5 hr |
| Jun 19, 9:42 PM CDT | Tornado Warning | DMX | Decatur, Ringgold | 48 min |
| Jun 19, 10:14 PM CDT | Severe Thunderstorm Warning | DMX | Warren | 46 min |
| Jun 19, 10:23 PM CDT | Tornado Warning | DMX | Decatur | 37 min |
| Jun 19, 10:52 PM CDT | Severe Thunderstorm Warning | DMX | Wayne | 33 min |
| Jun 19, 11:31 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose | 29 min |
| Jun 19, 11:55 PM CDT | Flash Flood Warning | DMX | Keokuk, Washington | 6 hr |
| Jun 19, 11:55 PM CDT | Flash Flood Warning | DMX | Mahaska | 6 hr |
| Jun 19, 11:55 PM CDT | Flash Flood Warning | DMX | Marion | 4 hr |
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.