Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 131, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 28, 1990, 12:24 PM CDT for Cerro Gordo County, Franklin County, Iowa. It was in force for 51 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 28, 1990, 12:24 PM CDT (17:24 UTC)
- Expired
- Jun 28, 1990, 1:15 PM CDT
- In force
- 51 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Cerro Gordo County, IA, Franklin County, IA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 28, 1:09 PM CDT | Tornado F3 | Franklin, IA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 5.4 hours before the alert went out and 218 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
- 102 J/kg
- Mixed-layer CIN
- -411 J/kg
- Mixed-layer LCL
- 772 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 298 m²/s²
- 0-3 km storm-relative helicity
- 307 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KALO 281724
SVRALO
IAC069-033-281815-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WATERLOO IA
1224 PM CDT THU JUN 28 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 115 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE NORTH CENTRAL PART OF IOWA
NORTHERN FRANKLIN...SOUTHERN CERRO GORDO
AT 1220 PM CDT WEATHER RADAR INDICATED A SEVERE THUNDERSTORM 15
MILES SOUTHWEST OF MASON CITY. THIS STORM IS MOVING SOUTHEAST AT
45 MILES AN HOUR AND WILL AFFECT THE TOWNS OF THORNTON...ROCKWELL
...SHEFFIELD AND HAMPTON. THIS STORM HAS PRODUCED HEAVY RAIN...
HAIL AND CAN PRODUCE WINDS IN EXCESS OF 60 MILES AN HOUR.`
YOU SHOULD MOVE INSIDE A REINFORCED BUILDING. STAY AWAY FROM
WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES UNTIL
AFTER THE STORM PASSES.
ROBBWhat 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 28, 8:48 AM CDT, 3 hours 36 minutes before
IAZALL-281430- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 845 AM CDT THU JUN 28 1990 ...FLASH FLOOD WATCH FOR WESTERN AND CENTRAL IOWA TODAY... AT 835 AM...A CLUSTER OF STRONG THUNDERSTORMS...PRODUCING LOCALLY HEAVY RAINS AND POSSIBLY SOME SMALL HAIL...CONTINUED OVER THE EXTREME SOUTHEAST COUNTIES OF IOWA. THIS CLUSTER OF STORMS WAS OVER THE BLOOMFIELD AND CENTERVILLE AREAS...OR FROM 20 MILES SOUTH OF OTTUMWA TO 30 MILES SOUTHWEST OF OTTUMWA. THESE STORMS WERE MOVING SOUTHEAST AT 35 MILES AN HOUR...AND SHOULD MOVE INTO MISSOURI BY 930 AM. OTHER THUNDERSHOWERS WERE SCATTERED OVER EASTERN IOWA...FROM OTTUMWA TO CEDAR RAPIDS...AND OVER CENTRAL IO1WA...JUST NORTH AND EAST OF DES MOINES. THESE THUNDERSHOWERS WERE ALSO MOVING SOUTHEAST AT 35 MILES AN HOUR. TRUETT/BARLOW
Special weather statement, Jun 28, 9:15 AM CDT, 3 hours 9 minutes before
IAZALL-281500- SPECIAL WEATHER STATEMENT AND WEATHER UPDATE NATIONAL WEATHER SERVICE DES MOINES IA 915 AM CDT THU JUN 28 1990 ...FLASH FLOOD WATCH FOR WESTERN AND CENTRAL IOWA TODAY... AT 900 AM...A CLUSTER OF STRONG THUNDERSTORMS CONTINUED OVER EXTREME SOUTHEAST IOWA...20 TO 30 MILES SOUTH AND SOUTHWEST OF OTTUMWA IN THE CENTERVILLE AND BLOOMFIELD AREAS. THESE STORMS HAVE WEAKENED SINCE 835 AM THIS MORNING...BUT WERE STILL PRODUCING LOCALLIZED AND BRIEF HEAVY RAINS. OTHER SHOWERS AND THUNDERSTORMS WERE ALSO OVER CENTRAL AND SOUTHEAST IOWA. THESE SHOWERS AND STORMS WERE IN A 50 MILE WIDE BAND CENTERED FROM FORT DODGE TO OTTUMWA. ALL OF THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 35 MILES AN HOUR. OUTLOOK UNTIL 11AM... THE SHOWERS AND THUNDERSTORMS OVER CENTRAL AND SOUTHEAST IOWA SHOULD CONTINUE TO WEAKEN AND DISSIPATE AS THE MORNING PROGRESSES. THUNDERSTORM REDEVELOPMENT IS NOT EXPECTED UNTIL EARLY AFTERNOON. TRUETT
Special weather statement, Jun 28, 9:49 AM CDT, 2 hours 35 minutes before
IAZALL-281530- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 945 AM CDT THU JUN 28 1990 ...FLASH FLOOD WATCH FOR WESTERN AND CENTRAL IOWA TODAY... AT 935 AM...SHOWERS AND THUNDERSHOWERS CONTINUED OVER PARTS OF CENTRAL AND SOUTHEAST IOWA. MOST OF THE SHOWERS AND STORMS WERE IN A 50 MILE WIDE BAND...CENTERED ON A KEOKUK...FORT DODGE LINE. THE GREATEST CONCENTRATION OF SHOWERS WAS OVER THE SOUTHEAST PART OF THE STATE...BETWEEN OTTUMWA AND KEOKUK. ALL OF THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 35 MILES AN HOUR. TRUETT/BARLOW
Special weather statement, Jun 28, 10:12 AM CDT, 2 hours 12 minutes before
IAZALL-281600- SPECIAL WEATHER STATEMENT AND WEATHER UPDATE NATIONAL WEATHER SERVICE DES MOINES IA 1010 AM CDT THU JUN 28 1990 ...FLASH FLOOD WATCH FOR WESTERN AND CENTRAL IOWA TODAY... AT 1000 AM...SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS CONTINUED OVER SOUTHEAST IOWA IN AN AREA FROM JUST SOUTH OF OTTUMWA EAST TO ABOUT 15 MILES WEST OF BURLINGTON. THE STORMS IN THIS AREA CONTINUE TO WEAKEN AND LITTLE MORE THAN BRIEF HEAVY RAIN CAN BE EXPECTED. AN ISOLATED SHOWER WAS LOCATED IN CENTRAL IOWA...35 MILES NORTHEAST OF DES MOINES NEAR NEVADA. THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 30 TO 35 MILES AN HOUR. THE OUTLOOK THROUGH NOON...THE SHOWERS AND STORMS SHOULD GRADUALLY MO(VE OUT OF SOUTHEAST IOWA...WHILE STRONG THUNDERSTORMS LOCATED IN SOUTHERN MINNESOTA MAY SKIM THE FAR NORTH TIER OF IOWAS COUNTIES NORTHWEST OF MASON CITY. BARLOW
Special weather statement, Jun 28, 10:50 AM CDT, 1 hour 34 minutes before
IAZALL-281630- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1045 AM CDT THU JUN 28 1990 AT 1040 AM...AN ISOLATED INTENSE THUNDERSTORM WAS OVER EXTREME NORTHWEST IOWA...ALONG THE IOWA-MINNESOTA BORDER JUST NORTHWEST OF ESTHERVILLE...OR ABOUT 30 MILES NORTHEAST OF SPENCER. LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH THIS STORM AS IT MOVES SOUTHEAST AT 35 MILES AN HOUR. ELSEWHERE...THE SHOWERS IN SOUTHEAST aIOWA CONTINUED TO WEAKEN AND DISSIPATE. MOST OF THESE SHOWERS WERE BETWEEN OTTUMWA AND BURLINGTON. THESE SHOWERS WERE MOVING SOUTHEAST AT 25 TO 30 MILES AN HOUR. TRUETT/BARLOW
Special weather statement, Jun 28, 12:05 PM CDT, 19 minutes before
IAZALL-281730- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1200 NOON CDT THU JUN 28 1990 AT 1155 AM...AN ISOLATED INTENSE THUNDERSTORM CONTINUED OVER NORTH CENTRAL IOWA...ABOUT 25 MILES WEST OF MASON CITY IN WESTERN HANCOCK COUNTY. LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH THIS STORM AS IT MOVES SOUTHEAST AT 35 MILES AN HOUR. IN SOUTHEAST IOWA...THE SHOWERS HAD DISSIPATED. TRUETT/BARLOW
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 1:12 AM CDT | Severe Thunderstorm Warning | DMX | Clay | 63 min |
| Jun 28, 1:37 AM CDT | Severe Thunderstorm Warning | DMX | Buena Vista | 68 min |
| Jun 28, 1:53 AM CDT | Severe Thunderstorm Warning | DMX | Pocahontas | 67 min |
| Jun 28, 2:11 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Sac | 64 min |
| Jun 28, 2:11 AM CDT | Severe Thunderstorm Warning | DMX | Palo Alto | 64 min |
| Jun 28, 2:24 AM CDT | Severe Thunderstorm Warning | DMX | Humboldt | 66 min |
| Jun 28, 2:52 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Webster | 68 min |
| Jun 28, 4:23 AM CDT | Severe Thunderstorm Warning | DMX | Carroll, Greene | 52 min |
| Jun 28, 5:10 AM CDT | Severe Thunderstorm Warning | DMX | Dallas | 35 min |
| Jun 28, 7:06 AM CDT | Severe Thunderstorm Warning | DMX | Monroe | 32 min |
| Jun 28, 10:32 AM CDT | Severe Thunderstorm Warning | DMX | Emmet | 43 min |
| Jun 28, 11:02 AM CDT | Severe Thunderstorm Warning | DMX | Kossuth | 43 min |
| Jun 28, 11:40 AM CDT | Severe Thunderstorm Warning | DMX | Hancock, Winnebago | 50 min |
| Jun 28, 11:43 AM CDT | Severe Thunderstorm Warning | DMX | Kossuth | 32 min |
| Jun 28, 12:15 PM CDT | Severe Thunderstorm Warning | DMX | Wright | 30 min |
| Jun 28, 1:09 PM CDT | Severe Thunderstorm Warning | DMX | Butler | 51 min |
| Jun 28, 1:09 PM CDT | Severe Thunderstorm Warning | DMX | Franklin | 26 min |
| Jun 28, 1:09 PM CDT | Tornado Warning | DMX | Hardin | 36 min |
| Jun 28, 1:26 PM CDT | Severe Thunderstorm Warning | DMX | Grundy | 54 min |
| Jun 28, 1:42 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 48 min |
| Jun 28, 1:44 PM CDT | Tornado Warning | DMX | Hardin | 31 min |
| Jun 28, 1:56 PM CDT | Severe Thunderstorm Warning | DMX | Marshall, Tama | 30 min |
| Jun 28, 2:13 PM CDT | Severe Thunderstorm Warning | DMX | Benton | 47 min |
| Jun 28, 2:23 PM CDT | Tornado Warning | DMX | Poweshiek, Tama | 37 min |
| Jun 28, 2:51 PM CDT | Tornado Warning | DMX | Iowa | 39 min |
| Jun 28, 2:51 PM CDT | Tornado Warning | DMX | Benton | 23 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.