Alert archive / Iowa / Flash Flood Warnings in 1986
Flash Flood Warning 8, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Sep 19, 1986, 8:06 AM CDT for Lucas County, Iowa. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Sep 19, 1986, 8:06 AM CDT (13:06 UTC)
- Expired
- Sep 19, 1986, 12:00 PM CDT
- In force
- 4 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Lucas 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 12:00Z, 1.1 hours before the alert went out and 257 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
- 3642 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 211 m²/s²
- 0-3 km storm-relative helicity
- 291 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 191306 FFWDSM IAC117-191700- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 806 AM CDT FRI SEP 19 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 1200 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTH CENTRAL IOWA...LUCAS A FLASH FLOOD WARNING MEANS FLOODING IS IMINENT OR IS OCCURRING. TAKE NECESSARY PRECAUTIONS IMMEDIATELY. THE CHARITON RIVER AT 8AM THIS MORNING WAS AROUND TWO FEET ABOVE FLOOD STAGE. FLOOD STAGE IS 16 FEET. MANY SMALLER STREAMS AND CREEKS IN THE CHARITION RIVER BASIN WERE OVERFLOWING THEIR BANKS. 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. MCQUIRTER
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, Sep 19, 2:43 AM CDT, 5 hours 23 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 2 45 AM CDT FRI SEP 19 1986 ...FLASH FLOOD WATCH FOR WEST HALF OF IOWA TONIGHT... AT 2 30 AM... THUNDERSTORMS WITH HEAVY RAIN WERE OCCURRING IN SOUTH CENTRAL...SOUTH WEST...AND A SMALL PART OF SOUTHEAST IOWA JUST SOUTH OF OTTUMWA. THE HEAVIEST PRECIPITATION WAS FALLING IN SOUTHWEST IOWA NEAR CORNING...AND IN SOUTHEAST IOWA JUST SOUTHEAST OF OTTUMWA. SHOWERS AND THUNDERSHOWERS WERE ALSO FALLING ON MOST OF THE SOUTHWEST HALF OF IOWA...SOUTHWEST OF A LINE FROM SPIRIT LAKE TO DAVENPORT. ALL PRECIPITATION WAS MOVING TO THE EAST AT 30 MILES AN HOUR. SCOTT
Special weather statement, Sep 19, 3:47 AM CDT, 4 hours 19 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 3 45 AM CDT FRI SEP 19 1986 ...FLASH FLOOD WATCH FOR WEST HALF OF IOWA TONIGHT... AT 3 30 AM... THUNDERSTORMS WITH HEAVY RAIN WERE MOVING INTO WEST CENTRAL IOWA JUST NORTH OF THE OMAHA AREA...AND THUNDERSTORMS WITH HEAVY RAIN CONTINUED IN SOUTHWEST IOWA NEAR LEON...OR ABOUT 35 MILES SOUTHWEST OF DES MOINES ...AND IN SOUTHEAST IOWA NEAR FAIRFIELD AND KEOSAUQUA...ABOUT 20 MILES EAST OF OTTUMWA. SHOWERS AND THUNDERSHOWERS WERE ALSO FALLING ON BUT A SMALL PART OF NORTHEAST AND SOUTHWEST IOWA. ALL PRECIPITATION WAS MOVING TO THE EAST AT 30 MILES AN HOUR. SCOTT
Special weather statement, Sep 19, 4:48 AM CDT, 3 hours 18 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 4 45 AM CDT FRI SEP 19 1986 ...FLASH FLOOD WATCH FOR WEST HALF OF IOWA TONIGHT... AT 4 30 AM... THUNDERSTORMS WITH HEAVY RAIN EXTENDED FROM WEST CENTRAL INTO CENTRAL IOWA BETWEEN OMAHA AND PERRY. SHOWERS AND THUNDERSTORMS COVERED MOST OF THE REMAINDER OF IOWA...EXCEPT FOR A SMALL PORTION OF NORTHEAST AND SOUTHWEST IOWA. ALL PRECIPITATION WAS MOVING TO THE EAS!T AT 30 MILES AN HOUR. SCOTT
Special weather statement, Sep 19, 5:44 AM CDT, 2 hours 22 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 5 45 AM CDT FRI SEP 19 1986 ...FLASH FLOOD WATCH FOR WEST HALF OF IOWA TONIGHT... AT 5 30 AM... THUNDERSTORMS WITH HEAVY RAIN EXTENDED FROM SOUTHWEST INTO CENTRAL IOWA. THE HEAVIEST RAINS WERE LOCATED ALONG A NARROW LINE...15 MILES WIDE AND EXTENDING FROM SHENANDOAH...35 MILES SOUTHEAST OF COUNCIL BLUFFS...TO JUST SOUTH OF AMES. SHOWERS AND THUNDERSTORMS COVEREWD MOST OF THE REMAINDER OF IOWA...EXCEPT FOR A SMALL PORTION OF NORTHEAST AND SOUTHWEST IOWA. ALL PRECIPITATION WAS MOVING TO THE EAST AT 30 MILES AN HOUR. SCOTT
Special weather statement, Sep 19, 6:44 AM CDT, 1 hour 22 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 6 45 AM CDT FRI SEP 19 1986 ...FLASH FLOOD WATCH FOR WEST HALF OF IOWA TONIGHT... AT 6 30 AM... THUNDERSTORMS WITH HEAVY RAINS WERE LOCATED IN WEST CENTRAL AND SOUTH WEST IOWA. THE HEAVIEST RAINS WERE LOCATED NEAR CRESTON...ABOUT 50 MILES SOUTHWEST OF DES MOINES. SHOWERS AND THUNDERSTORMS COVERED MOST OF THE REMAINDER OF IOWA...EXCEPT FOR A SMALL PORTION OF EXTREME EASTERN AND EXTREME WESTERN IOWA. HEAVY SHOWERS AND AND THUNDERSTORMS HAVE BEEN FALLING ON SOUTHWEST AND SOUTH CENTRAL IOWA MOST OF THE NIGHT. PRELIMINARY RAINFALL REPORTS INDICATED AMOUNTS RANGING FROM AROUND AN INCH TO OVER 4.5 INCHES. ALL PRECIPITATION WAS MOVING TO THE EAST AT 30 MILES AN HOUR. SCOTT
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 18, 7:05 PM CDT | Severe Thunderstorm Warning | DMX | Cass | 20 min |
| Sep 18, 7:32 PM CDT | Severe Thunderstorm Warning | DMX | Adair | 48 min |
| Sep 19, 1:00 AM CDT | Flash Flood Warning | DMX | Ringgold | 3 hr |
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.