Alert archive / Iowa / Flash Flood Warnings in 1986
Flash Flood Warning 4, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jul 13, 1986, 10:41 PM CDT for Adair County, Iowa. It was in force for 89 min.
The area
The counties it named.
The facts
- Issued
- Jul 13, 1986, 10:41 PM CDT (03:41 UTC)
- Expired
- Jul 14, 1986, 12:10 AM CDT
- In force
- 89 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, 3.7 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 140343 FFWDSM IAC001-140630- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1041 PM CDT SUN JUL 13 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 130 AM CDT MONDAY FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTHWEST IOWA...ADAIR A FLASH FLOOD WARNING MEANS FLOODING IS IMINENT OR IS OCCURRING. TAKE NECESSARY PRECAUTIONS IMMEDIATELY. THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOODING WARNING FOR ADAIR COUNTY UNTIL 130 AM MONDAY MORNING. ADAIR COUNTY IS ABOUT 50 MILES WEST SOUTHWEST OF DES MOINES. VERY HEAVY RAINS HAVE BEEN FALLING IN ADAIR COUNTY SINCE AROUND 930 THIS SUNDAY EVENING. GREENFIELD RECEIVED AROUND 1.4 INCHES OF RAIN IN ABOUT A HALF HOUR FROM 10 TO 1030 PM AND MORE HEAVY RAINS WILL CONTINUE IN THESE AREAS UNTIL AROUND MIDNIGHT. PEOPLE LIVING IN FLOOD PRONE AREAS SHOULD MOVE TO HIGHER GROUND AT ONCE. ACT QUICKLY..AS FLOOD WATERS OFTEN RISE VERY QUICKLY. IF YOU ARE DRIVING..DO NOT TRY TO DRIVE THROUGH FLOOD WATERS OF UNKNOWN DEPTH. IF YOUR VEHICLE STALLS..ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. DO NOT ATTEMPT TO CROSS A FLOWING STREAM ON FOOT WHERE THE WATER IS ABOVE YOUR KNEES. ADAMS
What forecasters said that day
The local office's own words before this flash flood 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, 2 hours 52 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, 1 hour 52 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, 9:19 PM CDT | Severe Thunderstorm Warning | DMX | Adair | 56 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, 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
Flash Flood Warnings in Iowa, 1986Every flash flood 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.