Alert archive / Iowa / Flash Flood Warnings in 1991

Flash Flood Warning 8, NWS Des Moines, IA

June 3, 1991Emmet County, Iowa

NWS Des Moines, IA issued this flash flood warning at Jun 3, 1991, 8:53 PM CDT for Emmet County, Iowa. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jun 3, 1991, 8:53 PM CDT (01:53 UTC)
Expired
Jun 4, 1991, 12:00 AM CDT
In force
3 hr
Issued by
NWS Des Moines, IA
Area
Whole counties

County Emmet County, IA

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 1.9 hours before the alert went out and 185 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.

Skew-T log-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 1991-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 1991-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
10 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
1121 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KDSM 040153
FFWDSM
IAC063-040500-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
853 PM CDT MON JUN 3 1991
 
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL MIDNIGHT CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHWEST IOWA
 
   ...EMMET COUNTY
 
A FLASH FLOOD WARNING HAS BEEN ISSUED FOR ALL EMMET COUNTY.
THUNDERSTORMS CONTINUED TO PERSIST OVER NORTHWEST IOWA THIS EVENING.
 
AT 845 PM...A SHERIFF OFFICER IN EMMET COUNTY REPORTED OVER THREE INCHES
OF RAIN IN ESTHERVILLE WITHIN A 45 MINUTE SPAN.  ANY ADDITIONAL RAINS
AND RUNOFF FROM PREVIOUS RAINS WILL AGGRAVATE FLOODING THAT HAS ALREADY
OCCURRED IN THE AREA.   PEOPLE LIVING ALONG STREAMS AND ALONG THE EAST
FORK OF THE DES MOINES RIVER SHOULD SEEK HIGH GROUND IMMEDIATELY.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS
OBSERVED...ACT QUICKLY.  MOVE UP TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO 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, Jun 3, 8:05 PM CDT, 48 minutes before
IAZALL-040130-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
740 PM CDT MON JUN 3 1991

AT 730 PM...SCATTERED SHOWERS AND THUNDERSTORMS WERE LOCATED IN THE WEST
HALF OF IOWA...INCLUDING A NUMBER OF AREAS WITH VERY HEAVY RAINS.  THE
RAIN WAS MOSTLY WEST OF A LINE FROM OTTUMWA TO ESTERVILLE.  VERY HEAVY
RAINS...STRONG GUSTY WINDS AND SMALL HAIL MAY BE EXPECTED WITH THE PASSAGE
OF THESE STORMS.{{}
THE HEAVIEST THUNDERSTORMS WERE LOCATED BETWEEN NEVADA AND ELDORA...OR
25 TO 50 MILES NORTHEAST OF DES MOINES.  RAINS IN THIS AREA HAVE
PERSISTED FOR SEVERAL HOURS...WITH SOME FLOODING REPORTED IN THE AREA.

VERY HEAVY RAINS WERE ALSO REPORTED IN THE ESTERVILLE AREA OF NORTHWEST
IOWA.  THE RAINS WERE ALSO ACOMPANIED WITH PEA TO MARBLE SIZE HAIL...AND
MINOR STREET FLOODING WAS REPORTED.

THUNDERSTORMS WITH HEAVY RAINS...AMD STRONG GUSTY WINDS WERE REPORTED
NEAR MANNING.  A BARN WAS ALSO REPORTED DESTROYED BY CARROLL COUNTY
SHERIFF.

THE THUNDERSTORMS WERE MOVING TO THE NORTH AT 20 MILES AN HOUR.

SCOTT

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 3, 10:59 PM CDTFlash Flood WarningDMXStory4 hr
Jun 4, 2:21 AM CDTFlash Flood WarningDMXCarroll4 hr
Jun 4, 3:52 AM CDTFlash Flood WarningDMXWebster4 hr

Nearby

Flash Flood Warnings in Iowa, 1991Every flash flood warning in 1991

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.