Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 82, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 16, 1990, 11:34 PM CDT for Jefferson County, Van Buren County, Iowa. It was in force for 26 min.
The area
The counties it named.
The facts
- Issued
- Jun 16, 1990, 11:34 PM CDT (04:34 UTC)
- Expired
- Jun 17, 1990, 12:00 AM CDT
- In force
- 26 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Jefferson County, IA, Van Buren 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
Topeka, KS (KTOP), launched 00:00Z, 4.6 hours before the alert went out and 378 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
- 3235 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1012 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 260 m²/s²
- Significant tornado parameter
- 2.2
- Supercell composite
- 14.2
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDSM 170436
SVRDSM
IAC101-177-170500-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1134 PM CDT JUN 16 1990
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL MIDNIGHT CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTHEAST IOWA
...WESTERN JEFFERSON...EASTERN WAPELLO
AT 1126 PM RADAR INDICATED A NEARLY STATIONARY SEVERE THUNDERSTORM
OVER EASTERN WAPELLO AND WESTERN JEFFERSON COUNTIES...OR ABOUT 10
MILES EAST OF OTTUMWA. THIS STORM WAS LIKELY PRODUCING STRONG
WINDS...VERY HEAVY RAIN AND POSSIBLE LARGE HAIL. THIS STORM HAS HAD A
HISTORY OF PRODUCING TORNADOES AND FUNNEL CLOUDS.
RESIDENTS IN THE WARNING AREA SHOULD ALSO BE ALERT FOR POSSIBLE FLASH
FLOODING.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIO;R ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.
ELLISWhat 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 16, 9:52 PM CDT, 1 hour 42 minutes before
IAZALL-170300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 950 PM CDT SAT JUN 16 1990 ...FLASH FLOOD WATCH FOR ALL OF IOWA TONIGHT... ...TORNADO WATCH FOR EXTREME SOUTHEAST IOWA UNTIL 1 AM SUNDAY MORNING... ...TORNADO WATCH FOR WESTERN IOWA UNTIL 100 AM SUNDAY MORNING... ...TORNADO WATCH FOR EXTREME NORTHWEST IOWA UNTIL 11 PM TONIGHT... AT 940 PM...A LINE OF INTENSE THUNDERSTORMS WAS OCCURRING OVER NORTH- WEST AND PARTS OF WEST CENTRAL IOWA. THESE STORMS WERE LOCATED IN A LINE THAT EXTENDED FROM SPENCER...POCOHANTAS...IDA GROVE...TO JUST WEST OF DENISON IN WEST CENTRAL IOWA. THESE STORMS WERE MOVING EAST NORTHEAST AT 25 MILES AN HOUR AND SHOULD BE AFFECTING THE TOWNS OF ALGONA...HUMBOLDT ROCKWELL CITY AND CARROLL BETWEEN 1030 AND 1100 PM THIS EVENING. THESE STORMS WILL PRODUCE VERY HEAVY RAINS...WINDS IN EXCESS OF 50 MILES AN HOUR...HAIL AND DANGEROUS LIGHTNING. / ANOTHER CLUSTER OF INTENSE THUNDERSTORMS WERE LOCATED OVER EXTREME SOUTH CENTRAL IOWA NEAR THE TOWNS OF CENTERVILLE AND MOULTON OR 35 MILES SOUTHWEST OF OTTUMWA. THE STORMS OVER NORTHWEST IOWA WERE MOVING EAST AT 30 TO 35 MPH ...WHILE THE STORMS OVER SOUTH CENTRAL IOWA WERE MOVING EAST 10 TO 15 MPH. JM/BARLOW
Special weather statement, Jun 16, 9:57 PM CDT, 1 hour 37 minutes before
IAZALL-170400- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 950 PM CDT SAT JUN 16 1990 ...FLASH FLOOD WATCH FOR ALL OF IOWA TONIGHT... ...TORNADO WATCH FOR EXTREME SOUTHEAST IOWA UNTIL 1 AM SUNDAY MORNING... ...TORNADO WATCH FOR WESTERN IOWA UNTIL 100 AM SUNDAY MORNING... ...TORNADO WATCH FOR EXTREME NORTHWEST IOWA UNTIL 11 PM TONIGHT... AT 940 PM...A LINE OF INTENSE THUNDERSTORMS WAS OCCURRING OVER NORTH- WEST AND PARTS OF WEST CENTRAL IOWA. THESE STORMS WERE LOCATED IN A LINE THAT EXTENDED FROM SPENCER...POCOHANTAS...IDA GROVE...TO JUST WEST OF DENISON IN WEST CENTRAL IOWA. THESE STORMS WERE MOVING EAST NORTHEAST AT 25 MILES AN HOUR AND SHOULD BE AFFECTING THE TOWNS OF ALGONA...HUMBOLDT ROCKWELL CITY AND CARROLL BETWEEN 1030 AND 1100 PM THIS EVENING. THESE STORMS WILL PRODUCE VERY HEAVY RAINS...WINDS IN EXCESS OF 50 MILES AN HOUR...HAIL AND DANGEROUS LIGHTNING. / ANOTHER CLUSTER OF INTENSE THUNDERSTORMS WAS LOCATED OVER EXTREME SOUTH CENTRAL IOWA NEAR THE TOWNS OF CENTERVILLE AND MOULTON OR 35 MILES SOUTHWEST OF OTTUMWA. THE STORMS OVER NORTHWEST IOWA WERE MOVING EAST AT 20 TO 30 MPH ...WHILE THE STORMS OVER SOUTH CENTRAL IOWA WERE MOVING EAST 10 TO 15 MPH. JM/BARLOW
Special weather statement, Jun 16, 10:19 PM CDT, 1 hour 15 minutes before
IAZALL-170430- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1020 PM CDT SAT JUN 16 1990 ...FLASH FLOOD WATCH FOR ALL OF IOWA TONIGHT... ...TORNADO WATCH FOR EASTERN IOWA UNTIL 400 AM SUNDAY MORNING... ...TORNADO WATCH FOR WESTERN IOWA UNTIL 100 AM SUNDAY MORNING... AT 1015 PM...A LINE OF INTENSE THUNDERSTORMS WAS OCCURRING OVER PARTS OF NORTH CENTRAL INTO WEST CENTRAL IOWA. THESE STORMS HAVE PRODUCE VERY HEAVY RAINS...STRONG GUSTY WINDS IN EXCESS OF 60 MILES AN HOUR AND SMALL HAIL. PEOPLE IN THE TOWNS OF HUMBOLDT...ESTHERVILLE...EMMETSBURG... ALGONA...ROCKWELL CITY...AND CARROLL SHOULD BE ON THE LOOKOUT FOR THESE STORMS AND MOVE TO PLACE OF SAFETY IF SEVERE WEATHER THREATEN YOUR AREA. ANOTHER CLUSTER OF INTENSE THUNDERSTORMS ABOUT 20 MILES SOUTHWEST OF OTTUMWA AND JUST EAST OF LAKE RATHBUN IN EXTREME SOUTH CENTRAL IOWA. THIS STORM CONTINUED TO SHOW VERY LITTLE MOVEMENT. VERY HEAVY RAINS AND DAMAGING WINDS ARE LIKELY WITH THIS STORM. THE STORMS OVER NORTH CENTRAL AND WEST CENTRAL IOWA WERE MOVING EAST AT 30 MILES AN HOUR. JM/BARLOW
Special weather statement, Jun 16, 10:56 PM CDT, 38 minutes before
IAZALL-170500- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1055 PM CDT SAT JUN 16 1990 ...FLASH FLOOD WATCH FOR ALL OF IOWA TONIGHT... ...TORNADO WATCH FOR EASTERN IOWA UNTIL 400 AM SUNDAY MORNING... ...TORNADO WATCH FOR WESTERN IOWA UNTIL 100 AM SUNDAY MORNING... AT 1030 PM...AN AREA OF INTENSE THUNDERSTORMS EXTENDED EAST OF ALGONA TO FORT DODGE JUST NORTHWEST OF JEFFERSON OR 50 MILES NORTHWEST OF DES MOINES. HEAVY RAINS...STRONG GUSTY WINDS IN EXCESS OF 60 MILES AN HOUR AND SMALL HAIL. PEOPLE IN THE TOWNS OF HUMBOLDT...BRITT...FORT DODGE...AND JEFFERSON SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER. ANOTHER CLUSTER OF INTENSE THUNDERSTORMS WAS LOCATED ABOUT 20 MILES SOUTHWEST OF OTTUMWA AND JUST EAST OF LAKE RATHBUN IN EXTREME SOUTH CENTRAL IOWA. VERY HEAVY RAINS...HAIL AND STRONG GUSTY WINDS ARE LIKELY WITH THIS STORM. THIS STORM SHOWED VERY LITTLE MOVEMENT. THE STORMS OVER NORTH CENTRAL AND WEST CENTRAL IOWA WERE MOVING EAST AT 30 MILES AN HOUR. JM/BARLOW
Special weather statement, Jun 16, 11:24 PM CDT, 10 minutes before
IA002-003-007-170400 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 1115 PM CDT SAT JUN 16 1990 AT 1115 PM CDT SHOWERS AND THUNDERSTORMS HAD MOVED INTO NORTHEAST IOWA ...THE LEADING EDGE OF THE STORMS WAS JUST EAST OF MASON CITY THEN SOUTH ALONG AND ABOUT 15 MILES EAST OF I35. THE STORMS WERE PRODUCING BRIEF HEAVY RAIN AND WIND GUSTS 30 TO 45 MILES AN HOUR AS THEY MOVE RAPIDLY EAST. THE REMAINDER OF NORTHEAST IOWA HAD CLOUDY SKIES AND TEMEPRATURES IN THE UPPER 60S AND LOWER 70S. THE WINDS WERE SOUTHERLY AT 10 TO 25 MILES AN HOUR. THESE THUNDERSTORMS WILL AFFECT THE FOLLOWING AREAS BY MIDNIGHT... MARBLE ROCK...GREENE...DUMONT...CHARLES CITY...OSAGE AND THE PARKERSBURG A0REA. THEY WILL PRODUCE BRIEF HEAVY RAIN..INTENSE LIGHTNING AND WINDS GUSTING TO 35 TO 45 MILES AN HOUR.
Special weather statement, Jun 16, 11:30 PM CDT, 4 minutes before
IAZALL-170530- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1125 PM CDT SAT JUN 16 1990 ...FLASH FLOOD WATCH FOR ALL OF IOWA TONIGHT... ...TORNADO WATCH FOR EASTERN IOWA UNTIL 400 AM SUNDAY MORNING... ...TORNADO WATCH FOR WESTERN IOWA UNTIL 100 AM SUNDAY MORNING... AT 1120 PM...A LARGE COMPLEX OF STRONG THUNDERSTORMS EXTENDED FROM MASON CITY...TO JEFFERSON OR 50 MILES NORTHWEST OF DES MOINES...TO 40 MILES SOUTH OF THE OMAHA/COUNCIL BLUFFS AREA. VERY HEAVY RAINS...STRONG GUSTY WINDS IN EXCESS OF 50 MILES AN HOUR...AND SMALL HAIL ARE LIKELY WITH SOME OF THESE STORMS. ANOTHER CLUSTER OF INTENSE THUNDERSTORMS WAS LOCATED OVER SOUTHEAST IOWA BETWEEN OTTUMWA AND THE QUAD CITIES. IN ADDITION...ISOLATED VERY STRONG THUNDERSTORMS HAD DEVELOPED OVER NORTHEAST IOWA. THESE STORMS WERE LOCATED ABOUT 20 MILES NORTH OF DUBUQUE. THE SHOWERS AND THUNDERSTORMS OVER THE WESTERN THIRD WAS MOVING EAST AT 30 MILES AN HOUR.5..WHILE THE STORMS OVER SOUTHEAST IOWA WAS MOVING EAST AT 10 TO 15 MILES AN HOUR. JM/BARLOW
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 16, 7:17 PM CDT | Tornado Warning | DMX | Lucas | 18 min |
| Jun 16, 7:33 PM CDT | Tornado Warning | DMX | Monroe | 27 min |
| Jun 16, 9:03 PM CDT | Tornado Warning | DMX | Appanoose | 27 min |
| Jun 16, 9:29 PM CDT | Tornado Warning | DMX | Buena Vista | 31 min |
| Jun 16, 9:33 PM CDT | Severe Thunderstorm Warning | DMX | Clay, Palo Alto, Pocahontas | 42 min |
| Jun 16, 9:45 PM CDT | Tornado Warning | DMX | Appanoose | 30 min |
| Jun 16, 9:50 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt, Kossuth | 40 min |
| Jun 16, 9:57 PM CDT | Tornado Warning | DMX | Van Buren | 33 min |
| Jun 16, 9:57 PM CDT | Tornado Warning | DMX | Monroe | 33 min |
| Jun 16, 10:16 PM CDT | Tornado Warning | DMX | Appanoose, Davis, Monroe, Wapello | 29 min |
| Jun 16, 10:17 PM CDT | Severe Thunderstorm Warning | DMX | Emmet | 28 min |
| Jun 16, 10:30 PM CDT | Severe Thunderstorm Warning | DMX | Webster, Wright | 45 min |
| Jun 16, 10:53 PM CDT | Tornado Warning | DMX | Jones | 37 min |
| Jun 16, 10:53 PM CDT | Tornado Warning | DMX | Jefferson, Van Buren | 37 min |
| Jun 16, 11:11 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton | 49 min |
| Jun 16, 11:47 PM CDT | Severe Thunderstorm Warning | DMX | Audubon | 28 min |
| Jun 17, 3:14 AM CDT | Flash Flood Warning | DMX | Crawford | 3 hr |
| Jun 17, 4:09 AM CDT | Flash Flood Warning | DMX | Washington | 3 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.