Alert archive / Iowa / Flash Flood Warnings in 2002

Flash Flood Warning 18, NWS Des Moines, IA

June 19, 2002Franklin County, Iowa

NWS Des Moines, IA issued this flash flood warning at Jun 19, 2002, 7:39 AM CDT for Franklin County, Iowa. It was in force for 16 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 19, 2002, 7:39 AM CDT (12:39 UTC)
Expired
Jun 19, 2002, 11:45 PM CDT
In force
16 hr
Issued by
NWS Des Moines, IA
Area
Counties, with a storm outline in the text

County Franklin County, IA

The radar

The Des Moines radar (KDMX), 111 km from the middle of the area, began a volume at 12:42 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 0.7 hours before the alert went out and 242 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 12:00Z on 2002-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 287 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 12:00Z on 2002-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 434 square meters per square second.19395878Sfc1 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
287 J/kg
Mixed-layer CIN
-238 J/kg
Mixed-layer LCL
669 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
434 m²/s²
0-3 km storm-relative helicity
503 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.0

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KDMX 191240
FFWDSM
IAC069-191645-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
739 AM CDT WED JUN 19 2002

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN FRANKLIN COUNTY IN NORTH CENTRAL IOWA

* UNTIL 1145 AM

* AT 737 AM...RADAR INDICATED THUNDERSTORMS WITH FLASH FLOOD         
  PRODUCING RAINS IN THE WARNING AREA.

* THUNDERSTORMS ARE CONTINUOUSLY REDEVELOPING...RESULTING IN         
  EXCESSIVE RAINFALL. RAINFALL RATES WILL AVERAGE 1 TO 2 INCHES      
  PER HOUR. THIS WILL PRODUCE FLASH FLOODING ALONG SMALL STREAMS     
  AND CREEKS.

OTHER WARNING LOCATIONS INCLUDE...
COULTER...GENEVA...HAMPTON...HANSELL...LATIMER AND POPEJOY

FLASH FLOODS OCCUR QUICKLY...MOVE TO HIGHER GROUND. NEVER DRIVE
THROUGH WATER OF UNKNOWN DEPTH...THE ROAD SURFACE MAY BE WASHED OUT.
LESS THAN ONE FOOT OF FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF
THE ROAD.

LAT...LON 4277 9349 4256 9349 4256 9304 4275 9303

KULA

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 6:52 AM CDTFlash Flood WarningDMXButler15 hr
Jun 19, 6:52 AM CDTFlash Flood WarningDMXButler3 hr
Jun 19, 7:39 AM CDTFlash Flood WarningDMXFranklin4 hr
Jun 19, 9:43 AM CDTFlash Flood WarningDMXButler6 hr

Nearby

Flash Flood Warnings in Iowa, 2002Every flash flood warning in 2002

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; radar from the NEXRAD Level II archive.