Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 99, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 19, 1990, 10:52 PM CDT for Wayne County, Iowa. It was in force for 33 min.
The area
The counties it named.
The facts
- Issued
- Jun 19, 1990, 10:52 PM CDT (03:52 UTC)
- Expired
- Jun 19, 1990, 11:25 PM CDT
- In force
- 33 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Wayne 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, 3.9 hours before the alert went out and 263 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
- 3628 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- -66 m²/s²
- 0-3 km storm-relative helicity
- 74 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 200353
SVRDSM
IAC185-200430-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1052 PM CDT TUE JUN 19 1990
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1130 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTH CENTRAL IOWA
...WAYNE
AT 1045 PM RADAR INDICATED A SEVERE THUNDERSTORM ON THE DECATUR COUNTY
/WAYNE COUNTY LINE...60 MILES SOUTH OF DES MOINES. THE STORM WAS
MOVING EAST AT 25 TO 30 MILES AN HOUR. THIS STORM WAS LIKELY PRODUCING
LARGE HAIL.
TOWNS TO BE AFFECTED BY THIS STORM INCLUDE
HUMESTON...CORYDON...PROMISE CITY...AND SEYMOUR.
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.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLXY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
MARTIN/ELLIS/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 19, 8:53 PM CDT, 1 hour 59 minutes before
IAZALL-200245- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IOWA 850 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 830 PM CDT...AN INTENSE THUNDERSTORM WAS INDICATED OVER SOUTH CENTRAL IOWA...OVER AND JUST TO THE NORTH OF PELLA. HIGH WINDS...HAIL AND TORRENTIAL RAINS ARE LIKELY FROM THIS STORM. THE STORM WAS MOVING EAST AT 25 MILES AN HOUR AND WILL BE LOCATED IN SOUTHEAST IOWA NEAR WHAT CHEER BY 930 PM. THIS STORM WAS PART OF A NARROW BAND OF STRONG THUNDERSTORMS THAT WAS LOCATED FROM 7 MILES SOUTH OF DES MOINES EAST TO SIGOURNEY... 20 MILES NORTHEAST OF OTTUMWA. THESE STORMS WERE ALSO MOVING EAST AT 25 MILES AN HOUR. THEY WERE ALSO PRODUCING EXTREMELY HEAVY RAINS. OTHER STRONG STORMS WERE OVER EXTREME NORTH CENTRAL AND NORTHEAST IOWA FROM THE MINNESOTA BORDER NORTH OF MASON CITY TO NEAR DECORAH. DLF
Special weather statement, Jun 19, 9:46 PM CDT, 1 hour 6 minutes before
IAZALL-200345- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 945 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 926 PM CDT...THUNDERSTORMS HAD DEVELOPED RAPIDLY OVER SOUTHWEST AND SOUTH CENTRAL IOWA FROM SOUTHEAST OF SHENANDOAH NEAR BEDFORD TO SOUTH OF DES MOINES NEAR OSCEOLA. THE LARGEST STORMS WERE LOCATED NEAR DIAGONAL...10 MILES SOUTH OF CRESTON AND 10 MILES WEST OF OSCEOLA. THESE STORMS WILL PRODUCE EXTREMELY HEAVY RAINS AND HAIL. STRONG THUNDERSTORMS WERE ALSO OVER THE SOUTHEAST COUNTIES. THESE STORMS WERE IN A 25 MILE WIDE BAND LOCATED FROM PELLA...35 MILES SOUTHEAST OF DES MOINES TO WAPPELLO...30 MILES NORTH OF BURLINGTON. THE LARGEST STORM IN THIS AREA WAS LOCATED 15 MILES NORTH OF OTTUMWA NEAR SIGOURNEY. ALL OF THE THUNDERSTORMS IN IOWA WERE MOVING EAST AT 25 MILES AN HOUR. DLF
Special weather statement, Jun 19, 10:00 PM CDT, 52 minutes before
IAZ003-007-008-200320- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1000 PM CDT TUE JUN 19 1990 ...SEVERE THUNDERSTORM WATCH FOR NORTHEAST IOWA HAS BEEN CANCELLED... THE SEVERE THUNDERSTORM WATCH FOR NORTHEAST IOWA IS NO LONGER IN EFFECT. ALTHOUGH A FEW THUNDERSTORMS ARE POSSIBLE IN NORTHEAST IOWA...THEY ARE NOT EXPECTED TO BE SEVERE. TRUETT
Special weather statement, Jun 19, 10:19 PM CDT, 33 minutes before
IAZALL-200400- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 1015 PM CDT TUE JUN 19 1990 ...TORNADO WATCH FOR EAST CENTRAL AND SOUTH IOWA UNTIL 1 AM... ...SEVERE THUNDERSTORM WATCH FOR SOUTHWEST AND SOUTH CENTRAL IOWA UNTIL 3 AM... ...A FLASH FLOOD/FLOOD WATCH FOR EAST AND SOUTH IOWA TONIGHT... STRONG THUNDERSTORMS CONTINUED TO RUMBLE OVER SOUTHERN IOWA. AT 1005 PM ...A 25 MILE WIDE BAND OF THUNDERSTORMS WAS LOCATED FROM SOUTHEAST OF CRESTON NEAR LAMONI TO NORTHEAST OF OTTUMWA NEAR WASHINGTON. AN INTENSE STORM WAS LOCATED 50 MILES SOUTH OF DES MOINES...OR JUST NORTH OF LAMONI. HIGH WINDS...HAIL AND TORRENTIAL RAINS WILL OCCUR WITH THIS STORM. OTHER LARGE STORMS WERE LOCATED NEAR CHARITON...SOUTH OF KNOXVILLE NEAR MELCHER AND NORTHEAST OF OTTUMWA NEAR SIGOURNEY. EXTREMELY HEAVY RAINS WILL ACCOMPANY THE THUNDERSTORMS. THE STORMS DROPPED 3 INCHES OF RAIN NORTH OF OSKALOOSA AT NEW SHAR-ON THIS EVENING. ALL OF THE THUNDERSTORMS IN IOWA WERE MOVING EAST AT 30 MILES AN HOUR. DLF
Special weather statement, Jun 19, 10:22 PM CDT, 30 minutes before
IAZ002-003-007-200500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 1020 PM CDT TUE JUN 19 1990 THE SEVERE THUNDERSTORM WATCH FOR NORTHEAST IOWA THAT WAS IN EFFECT UNTIL MIDNIGHT CDT H/AS BEEN CANCELLED. ALSO THE FLASH FLOOD WATCH THAT WAS IN EFFECT TONIGHT HAS ALSO BEEN CANCELLED FOR NORTHEAST IOWA.
Special weather statement, Jun 19, 10:48 PM CDT, 4 minutes before
IAZALL-200430- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 1045 PM CDT TUE JUN 19 1990 ...TORNADO WATCH FOR EAST CENTRAL AND SOUTH IOWA UNTIL 1 AM... ...SEVERE THUNDERSTORM WATCH FOR SOUTHWEST AND SOUTH CENTRAL IOWA UNTIL 3 AM... ...A FLASH FLOOD/FLOOD WATCH FOR EAST AND SOUTH IOWA TONIGHT... THUNDERSTORMS WITH EXTREMELY HEAVY RAINS AND HAIL WERE OVER SOUTH CENTRAL AND SOUTHEAST IOWA. AT 1031 PM...INTENSE THUNDERSTORMS WERE LOCATED OVER SOUTH CENTRAL IOWA NORTH OF LAMONI AND IN THE SOUTHEAST SECTION...NORTHWEST OF BURLINGTON NEAR BRIGHTON. THESE STORMS WERE PART OF A 25 MILE WIDE BAND OF STRONG THUNDERSTORMS THAT EXTENDED FROM THE IOWA/MISSOQURI BORDER SOUTH OF CRESTON TO NORTH OF OTTUMWA THEN EAST TO WAPELLO...NORTH OF BURLINGTON. THE THUNDERSTORMS WERE MOVING EAST AT 30 MILES AN HOUR. DLF
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 | Jones | 49 min |
| 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, 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.