Alert archive / Iowa / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 73, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jul 13, 1986, 9:19 PM CDT for Adair County, Iowa. It was in force for 56 min.
The area
The counties it named.
The facts
- Issued
- Jul 13, 1986, 9:19 PM CDT (02:19 UTC)
- Expired
- Jul 13, 1986, 10:15 PM CDT
- In force
- 56 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Adair 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, 2.3 hours before the alert went out and 159 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
- 3607 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 182 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 140220 SVRDSM IAC001-140315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 919 PM CDT SUN JUL 13 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTHWEST IOWA...ADAIR AT 916 PM..DES MOINES WEATHER RADAR INDICATED A SEVERE THUNDERSTORM ALONG THE CASS..ADAIR COUNTY LINE..ABOUT 10 MILES WEST OF GREENFIELD OR ABOUT 50 MILES WEST SOUTHWEST OF DES MOINES. THE STORM WAS MOVING EAST AT 20 MILES AN HOUR..AND WILL BE AFFECTING THE GREENFIELD AREA BETWEEN 945 AND 1015 PM. < 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. 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. DUE TO THE RATHER SLOW MOVEMENT OF THIS STORM..FLASH FLOODING IS ALSO A POSSIBILITY. PEOPLE IN LOW LYING AND FLOOD PRONE AREAS SHOULD REMAIN ALERT. 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 13, 7:49 PM CDT, 1 hour 30 minutes before
RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 740 PM CDT SUN JUL 13 1986 ...FLASH FLOOD WATCH TONIGHT FOR SOUTHWEST AND SOUTH CENTRAL IOWA... ...THUNDERSTORM DEVELOPS IN SOUTHWEST IOWA... AT 730 PM CDT... A STRONG THUNDERSTORM HAD DEVELOPED OVER SOUTHWEST IOWA...25 MILES EAST OF COUNCIL BLUFFS NEAR OAKLAND. THIS STORM WILL PRODUCE BRIEF HEAVY RAINS AS IT MOVES EAST AT 20 MILES AN HOUR. THE STORM SHOULD BE SOUTH OF ATLANTIC BY 83I0 PM. AN INTENSE THUNDERSTORM WAS LOCATED IN EAST CENTRAL NEBRASKA ABOUT 35 MILES NORTHWEST OF COUNCIL BLUFFS. THIS STORM WAS ALSO MOVING EAST AT 20 TO 25 MILES AN HOUR AND SHOULD CROSS THE IOWA BORDER SOUTH OF MONDAMIN BY 830 PM. FERRY
Special weather statement, Jul 13, 8:49 PM CDT, 30 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 845 PM CDT SUN JUL 13 1986 ...FLASH FLOOD WATCH TONIGHT FOR SOUTHWEST AND SOUTH CENTRAL IOWA... AT 830 PM CDT... A SEVERE THUNDERSTORM WAS INDICATED IN SOUTHWEST IOWA 35 MILES EAST OF COUNCIL BLUFFS OR 5 MILES WEST OF ATLANTIC. ONE AND ONE-HALF INCH HAIL WAS REPORTED FROM THIS STORM AT 815 PM AS IT CROSSED THE CASS AND POTTAWATTAMIE COUNTY LINE. THE STORM WAS MOVING EAST AT 15 MILES AN HOUR AND SHOULD BE IN WESTERN ADAIR COUNTY BY 930 PM. IN ADDITION TO THE LARGE HAIL..VERY HEAVY RAINS AND HIGH WINDS CAN BE EXPECTED FROM THIS STORM. BECAUSE OF THE SLOW MOVEMENT OF THE STORM LARGE AMOUNTS OF RAIN ARE POSSIBLE OVER CASS AND WESTERN ADAIR COUNTIES. PEOPLE IN FLOOD PRONE AREAS SHOULD REMAIN ALERT AND BE READY TO MOVE QUICKLY AS RAPID RISES IN WATER LEVELS ARE POSSIBLE. ANOTHER STRONG THUNDERSTORM WAS INDICATED ALONG THE MISSOURI RIVER 15 MIL}ES NORTH OF COUNCIL BLUFFS. THIS STORM WAS MOVING EAST AT 15 MILES AN HOUR. FERRY
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 7:55 PM CDT | Severe Thunderstorm Warning | DMX | Cass | 65 min |
| Jul 13, 8:25 PM CDT | Tornado Warning | DMX | Cass | 55 min |
| Jul 13, 9:40 PM CDT | Severe Thunderstorm Warning | DMX | Cass | 35 min |
| Jul 13, 10:13 PM CDT | Severe Thunderstorm Warning | DMX | Audubon, Cass | 32 min |
| Jul 13, 10:20 PM CDT | Tornado Warning | DMX | Audubon, Cass | 30 min |
| Jul 13, 10:36 PM CDT | Severe Thunderstorm Warning | DMX | Adair | 39 min |
| Jul 13, 10:41 PM CDT | Flash Flood Warning | DMX | Adair | 89 min |
| Jul 13, 11:04 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Madison, Union | 36 min |
| Jul 13, 11:40 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Lucas | 60 min |
| Jul 14, 12:15 AM CDT | Severe Thunderstorm Warning | DMX | Clarke, Decatur, Lucas, Wayne | 45 min |
| Jul 14, 12:58 AM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Wayne | 62 min |
| Jul 14, 3:00 AM CDT | Severe Thunderstorm Warning | DMX | Adair | 30 min |
| Jul 14, 9:18 AM CDT | Severe Thunderstorm Warning | DMX | Clay | 42 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.