Alert archive / Iowa / Tornado Warnings in 1986
Tornado Warning 23, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Jul 28, 1986, 11:38 PM CDT for Adair County, Union County, Iowa. It was in force for 97 min.
The area
The counties it named.
The facts
- Issued
- Jul 28, 1986, 11:38 PM CDT (04:38 UTC)
- Expired
- Jul 29, 1986, 1:15 AM CDT
- In force
- 97 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Adair 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, 4.6 hours before the alert went out and 169 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 290439 RRA TORDSM IAC001-175-290515- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1138 PM CDT MON JUL 28 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 1215 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTHWEST IOWA...SOUTHERN ADAIR AND NORTHERN UNION AT 1137 PM...DES MOINES RADAR INDICATED A TORNADO IN SOUTHERN ADAIR COUNTY..ABOUT 40 TO 50 MILES SOUTHWEST OF DES MOINES..OR JUST SOUTH OF GREENFIELD. THIS STORM WAS MOVING EAST SOUTHEAST AT 30 TO 40 MILES AN HOUR. AND WILL AFFECT THE CITIES OF CRESTON AND ORIENT.} IF A TORNADO APPROACHES..TAKE COVER IMMEDIATELY. A BASEMENT.. INTERIOR HALLWAY..OR A ROOM ON THE LOWEST FLOOR IS THE SAFEST PLACE IN MOST BUILDINGS. IF YOU ARE IN A MOBILE HOME OR AN AUTOMOBILE.. LEAVE AT ONCE. TAKE COVER IN A STORM SHELTER..OR LIE IN A NEARBY DITCH OR DEPRESSION. BARLOW/TRUETT
What forecasters said that day
The local office's own words before this tornado 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, 2 hours 45 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, 1 hour 33 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
The 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, 11:47 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 |
| Jul 29, 12:50 AM CDT | Severe Thunderstorm Warning | DMX | Decatur, Wayne | 55 min |
Nearby
Tornado Warnings in Iowa, 1986Every tornado warning in 1986Tornadoes 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.