Alert archive / Iowa / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 113, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jul 29, 1986, 12:50 AM CDT for Decatur County, Wayne County, Iowa. It was in force for 55 min.
The area
The counties it named.
The facts
- Issued
- Jul 29, 1986, 12:50 AM CDT (05:50 UTC)
- Expired
- Jul 29, 1986, 1:45 AM CDT
- In force
- 55 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Decatur County, IA, Wayne 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, 5.8 hours before the alert went out and 245 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
- 3613 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 119 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 290551 SVRDSM IAC185-053-290645- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1250 AM CDT TUE JUL 29 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 145 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTH CENTRAL IOWA...WAYNE AND NORTHEAST DECATUR AT 1249 AM..A SEVERE THUNDERSTORM WAS INDICATED ON RADAR 10 TO 15 MILES NORTH OF LAMONI..ALONG THE DECATUR..CLARKE COUNTY LINE..OR ABOUT 40 MILES SOUTH OF DES MOINES. THE STORM WAS MOVING SOUTHEAST AT 40 MILES AN HOUR..AND WILL MOVE THROUGH THE CITIES OF VAN WERT..GARDEN GROVE..LEROY.. LEON..HUMMESTON..AND CORYDON. < 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. THESE STORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING..SO BE ON THE LOOKOUT AND BE PREPARED TO MOVE TO A PLACE OF SAFETY IF ONE IS SPOTTED. IF THREATENING WEATHER APPROACHES..YOU SHOULD GO TO A SAFE PLACE IMMEDIATELY. IF SEVERE WEATHER CONDITIONS ARE OBSERVED..PLEASE ASK THE NEAREST LAW ENFORCEMENT AGENCY TO -RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE. FERRY/TRUETT
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, Jul 28, 8:53 PM CDT, 3 hours 57 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 845 PM CDT MON JUL 28 1986 A NARROW BAND OF SHOWERS AND THUNDERSTORMS HAVE DEVELOPED IN NORTHCENTRAL IOWA. THESE SHOWERS AND THUNDERSTORMS WERE THE RESULT OF OUT RUSHING WINDS FROM THE STRONG THUNDERSTORM SOUTH OF SPENCER. THE BAND OF RAIN EXTENDED FROM 30 MILES WEST OF MASON CITY..NEAR ALGONA..TO 40 MILES SOUTHWEST OF WATERLOO..NEAR ELDORA. THESE THUNDERSTRORMS WERE MOVING EAST AT 20 MILES AN HOUR. AT THE PRESENT TIME RAIN AND LIGHTNING COULD OCCUR AS THESE SHOWERS AND THUNDERSTORMS MOVE INTO HANCOCK..FRANKLIN AND GRUNDY COUNTIES. HAMILTON
Special weather statement, Jul 28, 10:05 PM CDT, 2 hours 45 minutes before
<PQ< SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1005 PM CDT MON JUL 28 1986 ..TORNADO WATCH NUMBER 422 HAS BEEN CANCELLED FOR A LARGE PORTION OF NORTHWEST IOWA.. ...TORNADO WATCH NUMBER 423 REMAINS IN EFFECT UNTIL 2 AM FOR WEST CENTRAL..CENTRAL..SOUTHWEST AND AND SOUTH CENTRAL IOWA... WATCH NUMBER 422 HAS BEEN CANCELLED FOR MOST OF NORTHWEST IOWA AS THE THUNDERSTORMS HAVE ALREADY PASSED THROUGH THE AREA. THE LINE OF THUNDERSTORMS HAVE CONTINUED TO WREAK HAVOC AS IT HAS MOVED INTO WEST CENTRAL AND CENTRAL IOWA. FOR THOSE FAMILIAR WITH THE ZONE ALIGNMENT..ZONES 1..4 AND 5 HAVE BEEN CLEARED OF THE TORNADO WATCH. REMEMBER..A TORNADO WATCH REMAINS IN E\FFECT UNTIL 2 AM FOR MUCH OF WEST CENTRAL..CENTRAL..SOUTH CENTRAL AND SOUTHWEST IOWA. DOWD
Special weather statement, Jul 29, 12:46 AM CDT, 4 minutes before
<PQ< SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1215 PM CDT MON JUL 28 1986 ..TORNADO WATCH NUMBER 423 HAS BEEN CANCELLED FOR A LARGE PART FO WEST CENTRAL AND CENTRAL IOWA. ...TORNADO WATCH NUMBER 423 REMAINS IN EFFECT UNTIL 2 AM FOR SOUTHWEST AND SOUTH CENTRAL IOWA... ..TORNADO WATCH NUMBER 425 REMAINS IN EFFECT UNTIL 4 AM FOR A LARGE PART SOUTHEAST IOWA AND PORTIONS OF EAST CENTRAL IOWA.. THE TORNADO WATCH NUMBER 423 HAS BEEN CANCELLED FOR WEST CENTRAL AND CENTRAL IOWA..AS THESE STORMS HAVE ALREADY PASSED THROUGH THE AREA. NUMEROUS INSTANCES OF WIND DAMAGE..AND A FEW REPORTS OF TORNADOES..OCCURRED IN THOSE COUNTIES EARLIER THIS EVENING. FOR THOSE FAMILIAR WITH ZONE ALIGNMENTS..THE WATCH HAS BEEN CANCELLED FOR ZONES 6..9 AND 10. REMEMBER..A TORNADO WATCH REMAINS IN EFFECT FOR SOUTHWEST AND SOUTH CENTRAL IOWA UNTIL 2 AM..AND IN A PORTION OF EAST CENTRAL AS WELL AS SOUTHEAST IOWA UNTIL 4 AM.& THIS INCLUDES ZONES 12..13 14 AND 15 AS WELL AS PART OF ZONE 11. DOWD
Local storm report, Jul 29, 12:47 AM CDT, 3 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1250 AM CDT TUE JUL 29 1986
TIME EVENT
735 PM EXTENSIVE DAMAGE TO BAILEY FARM 2S OF ROYAL IN CLAY COUNTY.
750 PM 50 TO 55 MPH WINDS..1/8TH MILE VSBY.
803 PM BASEBALL-SIZED HAIL 1S OF SIOUX RAPIDS IN BUENA VISTA COUNTY.
800-830 PM ANOTHER FARM DESTROYED NEAR ROYAL, 2S AND 1 1/2W.
ABT 820 PM BRIEF TORNADO TOUCHDOWN NEAR WHITING IN MONONA COUNTY.
ABT 825 PM PSBL TORNADO NEAR POCHAHONTAS.
830-930 PM WIND DAMAGE NEAR FORT DODGE.
/
1012 PM 50-55 MPH WINDS JUNCTION I-35 AND ROUTE 141.
1014 PM 40-50 MPH WINDS AT WAUKEE.
1016 PM WINDOW DAMAGE BETWEEN POLK CITY AND MADRID.
1018 PM PUBLIC RPT FUNNEL NEAR 22ND AND FOREST IN DES MOINES.
1020 PM TREES DOWNED IN WINDSOR HEIGHTS..SUBURB OF DES MOINES.
1024 PM TORNADO NEAR BERWICK..SUBURB OF DES MOINES.
1025 PM 62 MPH WIND..TREE DAMAGE AT FAIRGROUND IN DES MOINES.
1028 PM TRAILERS DAMAGED AT NEVADA IN STORY COUNTY.
1032 PM 60 MPH WINDS AT CARLISLE..WARREN COUNTY.
1048 PM 70 MPH WINDS AT MITCHELLVILLE..POLK COUNTY.
1058 PM 60 MPH WINDS NEAR ANKENY AND IN NORTHEAST DES MOINES.
ABT 1130 PM NO POWER IN MONTEZUMA..POWESHIEK COUNTY. PHONE LINES DOWN
TO KNOXVILLE IN MARION COUNTY.
1131 PM UNION COUNTY SHERIFF REPORTED POSSIBLE TORNADO 10 NW OF
CRESTON.
1136 PM GOLFBALL-SIZED HAIL BETWEEN FONTANELLE AND GREENFIELD IN
ADAIR COUNTY.
1138 PM 60 MPH WINDS IN BROOKLYN..POWESHIEK COUNTY.
1140 PM POWER LINES DOWNED IN MONROE COUNTY.
1148 PM 60-70 MPH WINDS IN EDDYVILLE..WAPELLO COUNTY.(
MYERSThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 7:07 PM CDT | Severe Thunderstorm Warning | DMX | Clay | 63 min |
| Jul 28, 7:48 PM CDT | Tornado Warning | DMX | Clay | 32 min |
| Jul 28, 7:57 PM CDT | Tornado Warning | DMX | Buena Vista, Pocahontas | 58 min |
| Jul 28, 8:07 PM CDT | Tornado Warning | DMX | Buena Vista | 48 min |
| Jul 28, 8:51 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Pocahontas, Webster | 64 min |
| Jul 28, 9:10 PM CDT | Tornado Warning | DMX | Crawford | 20 min |
| Jul 28, 9:22 PM CDT | Severe Thunderstorm Warning | DMX | Carroll, Greene | 58 min |
| Jul 28, 9:34 PM CDT | Tornado Warning | DMX | Carroll, Crawford | 56 min |
| Jul 28, 9:48 PM CDT | Severe Thunderstorm Warning | DMX | Guthrie | 42 min |
| Jul 28, 9:48 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas, Hamilton | 42 min |
| Jul 28, 10:14 PM CDT | Severe Thunderstorm Warning | DMX | Polk, Story | 46 min |
| Jul 28, 10:14 PM CDT | Severe Thunderstorm Warning | DMX | Madison | 46 min |
| Jul 28, 10:27 PM CDT | Tornado Warning | DMX | Jasper, Polk | 53 min |
| Jul 28, 10:31 PM CDT | Severe Thunderstorm Warning | DMX | Warren | 49 min |
| Jul 28, 10:31 PM CDT | Severe Thunderstorm Warning | DMX | Marshall | 49 min |
| Jul 28, 10:46 PM CDT | Severe Thunderstorm Warning | DMX | Marion | 54 min |
| Jul 28, 10:54 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Lucas | 46 min |
| Jul 28, 11:16 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Monroe | 44 min |
| Jul 28, 11:16 PM CDT | Severe Thunderstorm Warning | DMX | Poweshiek | 44 min |
| Jul 28, 11:22 PM CDT | Severe Thunderstorm Warning | DMX | Adair | 98 min |
| Jul 28, 11:38 PM CDT | Tornado Warning | DMX | Adair, Union | 97 min |
| Jul 28, 11:47 PM CDT | Severe Thunderstorm Warning | DMX | Keokuk, Wapello | 43 min |
| Jul 28, 11:47 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis | 43 min |
| Jul 29, 12:10 AM CDT | Severe Thunderstorm Warning | DMX | Jefferson, Van Buren | 50 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.