Alert archive / Iowa / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 22, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Apr 30, 1986, 1:02 AM CDT for Adams County, Union County, Iowa. It was in force for 53 min.
The area
The counties it named.
The facts
- Issued
- Apr 30, 1986, 1:02 AM CDT (06:02 UTC)
- Expired
- Apr 30, 1986, 1:55 AM CDT
- In force
- 53 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Adams County, IA, Union 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, 6.0 hours before the alert went out and 162 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
- 3583 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 124 m²/s²
- 0-3 km storm-relative helicity
- 206 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 300604 SVRDSM IAC003-175-300655- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 102 AM CDT WED APR 30 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 155 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTH CENTRAL IOWA...EASTERN ADAMS AND WESTERN UNION AT 1255 AM CDT RADAR INDICATES A SEVERE THUNDERSTORM JUST EAST OF CORNING IN NORTHWEST ADAMS COUNTY..ABOUT 60 MILES SOUTHWEST OF DES MOINES. THIS STORM IS MOVING TO THE EAST AT 35 MILES AN HOUR AND WILL AFFECT THE CITY OF CRESTON. LARGE HAIL AND HEAVY RAIN ARE LIKELY WITH THIS STORM. SUDDEN DAMAGING WINDS ARE ALSO POSSIBLE. 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. ELLINGSON
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 29, 10:10 PM CDT, 2 hours 52 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 1000 PM CDT TUE APR 29 1985 ...VERY HEAVY THUNDERSTORMS IN SOUTHERN BLACK HAWK COUNTY... AT 1000PM CDT WATERLOO RADAR SHOWED VERY HEAVY THUNDERSTORMS IN BLACK HAWK COUNTY MOVING TO THE EAST AT 40 MILES AN HOUR. THESE STORMS WILL BE IN THE VICINITY OF LA PORTE CITY AND HUDSON UNTIL 1030. GUSTY SURFACE WINDS AND POSSIBLE SOME SMALL HAIL AS WELL AS BRIEF PERIODS OF HEAVY RAIN ANaD DANGEROUS LIGHTNING CAN BE EXPECTED FROM THESE STORMS. FRANCISCO
Special weather statement, Apr 29, 10:55 PM CDT, 2 hours 7 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1035PM CDT TUE APR 29 1986 AT 1030PM...VERY HEAVY THUNDERSTORMS CONTINUED TO DEVELOP IN CENTRAL IOWA NEAR GRINNELL. VERY HEAVY RAIN...DAMAGING SURFACE WINDS AND HAIL CAN BE EXPECTED WITH THE PASSAGE OF THESE STORMS. A FEW INTENSE THUNDERSTORMS HAD ALSO DEVELOPED IN SOUTHWEST IOWA JUST WEST OF CORNING. STRONG GUSTY SURFACE WINDS AND HAIL CAN ALSO BE EXPECTED WITH THESE THUNDERFSTORMS. SHOWERS AND THUNDERSTORMS WERE ALSO LOCATED IN MOST OF THE REMAINDER OD WAST CENTRAL IOWA...HOWEVER THESE STORMS WERE OF LESSER INTENSITY. THE THUNDERSTORMS WERE MOVING TO THE EAST AT 35 MILES AN HOUR. SCOT~T
Special weather statement, Apr 29, 11:13 PM CDT, 1 hour 49 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY ...CORRECTION... NATIONAL WEATHER SERVICE DES MOINES IA 1035PM CDT TUE APR 29 1986 AT 1030PM...VERY HEAVY THUNDERSTORMS CONTINUED TO DEVELOP IN CENTRAL IOWA NEAR GRINNELL. VERY HEAVY RAIN...DAMAGING SURFACE WINDS AND HAIL CAN BE EXPECTED WITH THE PASSAGE OF THESE STORMS. A FEW INTENSE THUNDERSTORMS HAD ALSO DEVELOPED IN SOUTHWEST IOWA JUST WEST OF CORNING. STRONG GUSTY SURFACE WINDS AND HAIL CAN ALSO BE EXPECTED WITH THESE THUNDERFSTORMS. SHOWERS AND THUNDERSTORMS WERE ALSO LOCATED IN MOST OF THE REMAINDER OF EAST CENTRAL IOWA...HOWEVER THESE STORMS WERE OF LESSER INTENSITY. THE THUNDERSTORMS WERE MOVING TO THE EAST AT 35 MILES AN HOUR. SCOTT
Special weather statement, Apr 29, 11:48 PM CDT, 1 hour 14 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1140 PM CDT TUE APR 29 1986 ...A SEVERE THUNDERSTORM WATCH FOR THE SOUTHERN HALF OF IOWA TIL 5 AM... THERE WAS NO SEVERE WEATHER REPORTED IN IOWA FROM 1030 TO 1130 PM. AT 1135 PM.. THERE WERE 2 AREAS OF THUNDERSTORMS IN IOWA. THE FIRST WAS A CLUSTER OF STORMS IN THE EAST CENTRAL COUNTIES...AROUND CEDAR RAPIDS..IOWA CITY.. MARSHALLTOWN..AND BELLE PLAINE. THESE STORMS WERE LIKELY DUMPING SOME HEAVY RAINS AND OCCASIONAL SMALL HAIL..BUT THE DURATION WAS SHORT DUE TO THE RAPID MOVEMENT. THE SECOND AREA OF STORMS WAS IN THE SOUTHWEST PART OF IOWA....AND WAS SMALLER IN SIZE. THESE STORMS WERE AROUND CORNING AND RED OAK. THEY HAVE A HISTORY OF PRODUCING SOME PEA TO MARBLE SIZED HAIL. THE STORMS IN BOTH EAST CENTRAL AND SOUTHWESTERN IOWA WERE MOVING EAST AT 40 MILES AN HOUR. POTTS
Special weather statement, Apr 30, 12:40 AM CDT, 22 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1240 AM CDT WED APR 30 1986 ...A SEVERE THUNDERSTORM WATCH FOR THE SOUTHERN HALF OF IOWA TIL 5 AM... THERE WAS NO SEVERE WEATHER REPORTED IN IOWA FROM 1130 PM TO 1230 AM. AT 1235 AM.. THERE WERE STILL 2 AREAS OF THUNDERSTORMS IN IOWA. THE FIRST WAS IN THE EAST CENTRAL COUNTIES...AROUND CEDAR RAPIDS..IOWA CITY AND BELLE PLAINE. THE SECOND AREA OF STORMS WAS IN THE SOUTHWEST PART OF THE STATE..AROUND CRESTON..CORNING..AND CUMBERLAND. THESE STORMS WERE MORE INTENSE AND WERE DROPPING SOME VERY HEAVY RAINS AND A LITTLE SMALL HAIL AS WELL. THESE STORMS WERE HEADED FOR CENTRAL IOWA....WITH THE DES MOINES METRO AREA IN THEIR SIGHT...AND ESTIMATED TIME OF ARRIVAL WOULD BE ABOUT 130 OR 2 AM. ALL THE STORMS WERE MOVING EAST AT 35 MILES AN HOUR. POTTS
Special weather statement, Apr 30, 12:55 AM CDT, 7 minutes before
<PQ< SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1255 AM CDT WED APR 30 1986 THUNDERSTORMS PRODUCING VERY HEAVY RAINS HAVE BEEN MOVING ACROSS TAMA.. BENTON..AND IOWA COUNTIES SINCE AROUND 11PM LAST EVENING. THESE COUNTIES ARE LOCATED IN EAST CENTRAL IOWA JUST TO THE WEST AND SOUTHWEST OF CEDAR RAPIDS. WATER HAS BEEN REPORTED OVER SEVERAL COUNTY HIGHWAYS. AT 1245 AM THIS MORNING HIGHWAY 82..LOCATED IN SOUTH CENTRAL BENTON COUNTY..REPORTED AROUND 5 INCHES OF RAIN OVER THE HIGHWAY. IN SOUTHWEST IOWA VERY HEAVY RAINS HAVE ALSO BEEN FALLING OVER ADAMS AND MONTGOMERY COUNTY. PERSONS IN THESE AREAS SHOULD BE ON THE ALERT FOR WATER FLOWING ACROSS SOME HIGHWAYS. IN BOTH OF THE ABOVE AREAS MANY SMALL CREEKS WILL ALSO BE BANKFULL OR OVER SO PERSONS AFFECTED BY ANY SMALL STREAM OR CREEK SHOULD BE ON THE LOOKOUT FOR FLOODING. ADAMS
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 10:56 PM CDT | Severe Thunderstorm Warning | DMX | Iowa, Poweshiek | 44 min |
| Apr 30, 8:03 AM CDT | Severe Thunderstorm Warning | DMX | Guthrie | 27 min |
| Apr 30, 8:20 AM CDT | Severe Thunderstorm Warning | DMX | Guthrie | 40 min |
| Apr 30, 8:20 AM CDT | Severe Thunderstorm Warning | DMX | Audubon, Carroll | 20 min |
| Apr 30, 9:03 AM CDT | Severe Thunderstorm Warning | DMX | Dallas | 24 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.