Alert archive / Iowa / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 8, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Apr 25, 1986, 1:17 AM CST for Keokuk County, Mahaska County, Wapello County, Iowa. It was in force for 58 min.
The area
The counties it named.
The facts
- Issued
- Apr 25, 1986, 1:17 AM CST (07:17 UTC)
- Expired
- Apr 25, 1986, 2:15 AM CST
- In force
- 58 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Keokuk County, IA, Mahaska County, IA, Wapello 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
Peoria Regional, IL (KPIA), launched 00:00Z, 7.3 hours before the alert went out and 244 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
- 2255 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 219 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 250719
SVRDSM
IAC107-179-123-250815-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
117 AM CST FRI APR 25 1986
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 215 AM CST FOR PEOPLE IN THE FOLLOWING
COUNTIES OF
SOUTHEAST IOWA...SOUTHERN KEOKUK...NORTHEAST WAPELLO AND SOUTHEAST
MAHASKA
AT 112 AM..3/4 INCH TO GOLF BALL SIZED HAIL WAS REPORTED AT
OSKALOOSA..ABOUT 20 MILES NORTHWEST OF OTTUMWA.
THE STORM WAS MOVING EAST-SOUTHEAST AT 35 MILES AN HOUR..AND WILL
MOVE JUST TO THE NORTH OF THE OTTUMWA AREA.
REMEMBER..A SEVERE THUNDERSTORM CAN PRODUCE DAMAGING WINDS IN EXCESS
OF 60 MPH..LARGE HAIL..DEADLY LIGHTNING..AND HEAVY RAINS THAT CAN
QUICKLY FLOOD LOW LYING AREAS.
TRUETT/FERRYWhat 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, Apr 24, 9:43 PM CST, 3 hours 34 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 940 PM CST THU APR 24 1986 AT 915 PM..MARBLE SIZE HAIL WAS REPORTED AT WINTERSET. AT 920 PM..SMALL HAIL WAS REPORTED JUST SOUTHEAST OF INDIANOLA. AT 935 PM.. A THUNDERSTORM WITH VERY HEAVY RAIN AND SMALL HAIL WAS LOCATED 20 MILES SOUTHWEST OF DES MOINES NEAR WINTERSET. ANOTHER THUNDERSTORM WITH VERY HEAVY RAIN AND SMALL HAIL WAS LOCATED 20 MILES SOUTHEAST O"F DES MOINES BETWEEN INDIANOLA AND MELCHER. THE STORMS WERE MOVING EAST AT 25 MILES AN HOUR.AND SHOULD BE MOVING INTO THE KNOXVILLE AREA BY 1015 PM. THERE HAS BEEN NO SEVERE WEATHER REPORTED WITH THESE STORMS. BARLOW/MCQUIRTER
Special weather statement, Apr 24, 11:10 PM CST, 2 hours 7 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 1110 PM CST THU MAR 24 1986 ..THUNDERSTORMS DEVELOP RAPIDLY ACROSS NORTHCENTRAL AND NORTHEAST IOWA.. AT 1100 PM..WATERLOO RADAR SHOWED A BAND OF SHOWERS AND THUNDERSTORMS DEVELOPING RAPIDLY ACROSS NORTHEAST AND NORTHCENTRAL IOWA. THE BAND EXTENDED FROM NEW HAMPTON..35 NORTH OF WATERLOO..TO FORT DODGE. THE STRONGEST THUNDERSTORMS WERE IN WRIGHT AND FRANKLIN COUNTIES.. BETWEEN SHEFFIELD..20 MILES SOUTH OF MASON CITY..TO EAGLE GROVE WHICH IS 10 MILES NORTHEAST OF FORT DODGE. THESE THUNDERSTORMS COULD PRODUCE BRIEF PERIODS OF HEAVY RAIN AND SOME SMALL HAIL AS THEY MOVE THROUGH SOUTH CERRO GORDO..NORTH FRANKLIN AND FLOYD COUNTIEbS BETWEEN 1100 PM AND MIDNIGHT. THE STORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR. HAMILTON
Local storm report, Apr 24, 11:18 PM CST, 1 hour 59 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1120 PM CST THU APR 24 1986
TIME REPORT
1018 PM CST 1 INCH DIAMETER HAIL REPORTED BY NWS EMPLOYEE
IN INdDIANOLA. HAIL LASTED 2 MINUTES.
1110 PM CST DIME SIZE HAIL REPORTED AT NEW VIRGINIA.
SCHUMACHERLocal storm report, Apr 25, 12:07 AM CST, 1 hour 10 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1205 AM CST FRI APR 25 1986
TIME REPORT
1156 PM CST 3/4 INCH DIAMETER HAIL REPORTED BY SHERIFF IN
MARION COUNTY..1 MILE NORTH OF COLUMBIA.
SCHUMACHERSpecial weather statement, Apr 25, 12:08 AM CST, 1 hour 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 1200 AM CST FRI MAR 25 1986 ...STRONG THUNDERSTORMS CONTINUE IN NORTHCENTRAL AND NORTHEAST IOWA.. AT MIDNIGHT..A BAND OF STRONG THUNDERSTORMS CONTINUE IN NORTHCENTRAL AND NORTHEAST IOWA. THE BAND EXTENDED FROM NEAR NEW HAMPTON..30 MILES NORTH OF WATERLOO TO CLARION..30 MILES SOUTHWEST OF MASON CITY. THE STRONGEST THUNDERSTORMS WERE IN FRANKLIN AND FLOYD COUNTIES.. BETWEEN SHEFFIELD..20 MILES SOUTH OF MASON CITY..TO CHARLES CITY WHICH IS 30 MILES SOUTHEAST OF MASON CITY. THESE THUNDERSTORMS HAVE AND WILL CONTINUE TO PRODUCE BRIEF PERIODS OF HEAVY RAIN AND SOME SMALL HAIL. PERSONS IN FLOYD AND NORTH CHICKASAW COUNTIES WILL EXPERIENCE THESE STORMS BETWEEN MIDNIGHT AND 100 AM. THE STORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR. HAMILTON
Special weather statement, Apr 25, 12:52 AM CST, 25 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1250 AM CST FRI APR 25 1986 AT 1235 AM.. A THUNDERSTORM WAS PRODUCING VERY HEAVY RAIN AND POSSIBLELY SOME SMALL HAIL OVER SOUTH CENTRAL IOWA. THE STORM WAS LOCATED 35 MILES SOUTHEAST OF DES MOINES. THE STORM WAS MOVING NORTHEAST AT 40 MILES AN HOUR. THE STORM WILL BE PASSING JUST NEAR OSKALOOSA BY 1 AM. PEOPLE IN AND NEAR OSKALOOSA CAN EXPECT VERY HEAVY RAIN AND SMALL HAIL FROM THIS STORM. ANOTHER THUNDERSTORM WAS INDICATED OVER CENTRAL IOWA JUST NORTHEAST OF INDIANOLA. A THUNDERSTORM WAS OCCURRING OVER NORTH CENTRAL IOWA 15 MILES SOUTHEAST OF MASON CITY. THESE STORMS WERE ALSO MOVING EAST AT 40 MILES AN HOUR. FERRY
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 10:37 PM CST | Severe Thunderstorm Warning | DMX | Madison, Warren | 33 min |
| Apr 24, 11:07 PM CST | Severe Thunderstorm Warning | DMX | Warren | 38 min |
| Apr 24, 11:39 PM CST | Severe Thunderstorm Warning | DMX | Marion | 36 min |
| Apr 25, 4:24 PM CST | Severe Thunderstorm Warning | DMX | Floyd | 41 min |
| Apr 25, 4:42 PM CST | Severe Thunderstorm Warning | DMX | Allamakee | 53 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1986Every severe thunderstorm warning in 1986
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.