Alert archive / Iowa / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 7, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Apr 24, 1986, 11:39 PM CST for Marion County, Iowa. It was in force for 36 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
- Apr 24, 1986, 11:39 PM CST (05:39 UTC)
- Expired
- Apr 25, 1986, 12:15 AM CST
- In force
- 36 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Marion 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 |
|---|---|---|---|
| Apr 24, 11:56 PM CST | Hail 1.75 | Marion, 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
Omaha, NE (KOAX), launched 00:00Z, 5.7 hours before the alert went out and 273 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
- 3542 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 229 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 250540 SVRDSM IAC125-250615- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1139 PM CST THU APR 24 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1215 AM CST FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTH CENTRAL IOWA...SOUTHERN MARION THIS WARNING INCLUDES THE CITIES OF MELCHER..COLUMBIA..AND ATTICA..AROUND 35 MILES TO THE SOUTHEAST OF DES MOINES. AT 1136 PM RADAR INDICATED A SEVERE STORM IN SOUTHEAST WARREN COUNTY MOVING TO THE EAST AT 35 MILES AN HOUR. THE STORM WILL MOVE INO THE MELCHER AREA BY 1150 PM AND AROUND ATTICA BY SHORTLY AFTER MIDNIGHT. REMEMBER..A SEVERE THUNDERSTORM CAN qPRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH..LARGE HAIL..DEADLY LIGHTNING..AND HEAVY RAINS THAT CAN QUICKLY FLOOD LOW LYING AREAS. WEINBRECHT/BARLOW
What 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, 8:33 PM CST, 3 hours 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 825 PM CST THU APR 24 1986 AT 825 PM.. A THUNDERSTORM..PRODUCING SOME VERY HEAVY RAIN..WAS LOCATED 25 MILES SOUTHWEST OF DES MOINES IN SOUTHERN MADISON COUNTY. THIS STORM WAS SOME 10 MILES SOUTH OF WINTERSET. IT WAS MOVING NORTHEAST AT 25 MILES AN HOUR...AND WILL STAY SOUTH OF THE DES MOINES METRO AREA. IT SHOULD MOVE INTO WARREN COUNTY BY 9 PM..AROUND ST MARYS. NO SEVERE WEATHER WAS EXPECTED..ALTHOUGH BRIEF HEAVY RAINS AND SOME HAIL PROBABLY WILL OCCUR. POTTS
Special weather statement, Apr 24, 8:48 PM CST, 2 hours 51 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 847 PM CST THU APR 24 1986 AT 835 PM.. A SMALL CLUSTER OF THUNDERSTORMS..WITH VERY HEAVY RAIN AND POSSIBLY SOME SMALL HAIL..WAS LOCATED ABOUT 25 MILES SOUTHWEST OF DES MOINES NEAR WINTERSET. THE STORMS WERE MOVING NORTHEAST AT 25 MILES AN HOUR AND SHOULD BE MOVING INTO THE DES MOINES AND INDIANOLA AREAS BY 930 PM. THERE HAS BEEN NO SEVERE WESTHER REPORTED WITH THESE STORMS. BARLOW
Special weather statement, Apr 24, 8:50 PM CST, 2 hours 49 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 847 PM CST THU APR 24 1986 AT 835 PM.. A SMALL CLUSTER OF THUNDERSTORMS..WITH VERY HEAVY RAIN AND POSSIBLY SOME SMALL HAIL..WAS LOCATED ABOUT 25 MILES SOUTHWEST OF DES MOINES NEAR WINTERSET. THE STORMS WERE MOVING NORTHEAST AT 25 MILES AN HOUR AND SHOULD BE MOVING INTO THE DES MOINES AND INDIANOLA AREAS BY 930 PM. THERE HAS BEEN NO SEVERE WEATHER REPORTED WITH THESE STORMS. BARLOW
Special weather statement, Apr 24, 9:43 PM CST, 1 hour 56 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, 29 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, 21 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.
SCHUMACHERThe 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 25, 1:17 AM CST | Severe Thunderstorm Warning | DMX | Keokuk, Mahaska, Wapello | 58 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.