Alert archive / Iowa / Tornado Warnings in 1986
Tornado Warning 20, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Jul 28, 1986, 9:10 PM CDT for Crawford County, Iowa. It was in force for 20 min.
The area
The counties it named.
The facts
- Issued
- Jul 28, 1986, 9:10 PM CDT (02:10 UTC)
- Expired
- Jul 28, 1986, 9:30 PM CDT
- In force
- 20 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Crawford 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, 2.2 hours before the alert went out and 114 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 290210 TORDSM IAC047-290230- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DES MOINES IA 910 PM CDT MON JUL 28 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 930 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF WEST CENTRAL IOWA...SOUTHWEST CRAWFORD AT 905 PM...A TORNADO WAS REPORTED NEAR CHARTER OAK IN EXTREME WEST CENTRAL CRAWFORD COUNTY..ABOUT 50 MILES SO%UTHEAST OF SIOUX CITY THE STORM WAS MOVING SOUTHEAST AT 35 MILES AN HOUR. IF YOU ARE IN THE PATH OF THIS STORM..TAKE COVER IMMEDIATELY. 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, 5:35 PM CDT, 3 hours 35 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 535 PM CDT MON JUL 28 1986 ..A TORNADO WATCH IS IN EFFECT FOR A LARGE PART OF WESTERN IOWA UNTIL 11 PM.. AT 530 PM CDT..NO PRECIPITATION WAS OCCURRING IN IOWA..HOWEVER VERY STRONG THUNDERSTORMS WERE RAPIDLY DEVELOPING OVER WESTERN MINNESOTA..NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA. THESE STORMS WERE MOVING SOUTHEAST AT 25 TO 30 MILES AN HOUR A"ND SHOULD BE ENTERING NORTHWEST IOWA AROUND 7 PM THIS EVENING. BARLOW
Special weather statement, Jul 28, 8:53 PM CDT, 17 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
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, 9:22 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 |
| 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.