Alert archive / Iowa / Flash Flood Warnings in 2004

Flash Flood Warning 32, NWS Des Moines, IA

June 8, 2004Worth County, Iowa

NWS Des Moines, IA issued this flash flood warning at Jun 8, 2004, 8:57 PM CDT for Worth 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 8, 2004, 8:57 PM CDT (01:57 UTC)
Expired
Jun 9, 2004, 12:45 PM CDT
In force
16 hr
Issued by
NWS Des Moines, IA
Area
Counties, with a storm outline in the text

County Worth County, IA

The radar

The Minneapolis radar (KMPX), 163 km from the middle of the area, began a volume at 01:57 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 00:00Z, 2.0 hours before the alert went out and 163 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 2004-06-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2004-06-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1194 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
228 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.2

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KDMX 090159
FFWDMX
IAC195-090545-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
857 PM CDT TUE JUN 8 2004

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WORTH COUNTY IN NORTH CENTRAL IOWA

* UNTIL 1245 AM

* AT 856 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH FLASH FLOOD PRODUCING RAINS IN THE WARNING AREA.

* THUNDERSTORMS ARE CONTINUOUSLY REDEVELOPING...RESULTING IN         
  EXCESSIVE RAINFALL. RAINFALL RATES WILL AVERAGE 2 TO 3 INCHES      
  PER HOUR. THIS WILL PRODUCE FLASH FLOODING ALONG DEER              
  CREEK...GOOSE CREEK...ELK CREEK...AND SMALL TRIBUTARIES OF THE     
  SHELL ROCK RIVER.

OTHER WARNING LOCATIONS INCLUDE...
GRAFTON...HANLONTOWN...JOICE...KENSETT...MANLY...NORTHWOOD AND
NORTHWOOD MUNICIPAL AIRPORT

FLASH FLOODS OCCUR QUICKLY...MOVE TO HIGHER GROUND. AVOID WATER
COVERED ROADS...THE ROAD MAY BE WASHED OUT. LESS THAN ONE FOOT OF
FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD.

LAT...LON 4350 9306 4326 9305 4327 9348 4350 9349

$$

KULA
3 follow-up statements
000 
WGUS73 KDMX 090243
FFSDMX
IAC189-195-090545-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
943 PM CDT TUE JUN 8 2004

...A FLASH FLOOD WARNING CONTINUES FOR WINNEBAGO AND WORTH COUNTIES
UNTIL 1245 AM...

AT 943 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORMS WITH FLASH FLOOD PRODUCING RAINS 6 MILES SOUTH
OF HANLONTOWN...OR ABOUT 9 MILES WEST OF MASON CITY...MOVING
NORTHEAST AT 25 MPH.

THUNDERSTORMS WITH EXCESSIVE RAINFALL WILL BE...

  NEAR MANLY AROUND 1000 PM...
  NEAR KENSETT AROUND 1010 PM AND
  NEAR GRAFTON AROUND 1020 PM.

AT 904 PM...WINNEBAGO COUNTY EMERGENCY MANAGEMENT REPORTED 2 INCHES 
OF WATER OVER COUNTY ROADS A16 AND R50.

THUNDERSTORMS ARE CONTINUOUSLY REDEVELOPING OVER THE EASTERN PORTION 
OF THE WARNING AREA...RESULTING IN EXCESSIVE RAINFALL. RAINFALL 
RATES WILL AVERAGE 1 TO 2 INCHES PER HOUR.

FLASH FLOODS OCCUR QUICKLY...MOVE TO HIGHER GROUND. AVOID WATER
COVERED ROADS...THE ROAD MAY BE WASHED OUT. LESS THAN ONE FOOT OF
FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD.

LAT...LON 4351 9393 4327 9392 4327 9301 4350 9300

$$

KULA
000 
WGUS73 KDMX 090418
FFSDMX
IAC189-195-090600-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1118 PM CDT TUE JUN 8 2004

...A FLASH FLOOD WARNING CONTINUES FOR WINNEBAGO AND WORTH COUNTIES
UNTIL 1245 AM...

AT 1107 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THE CENTER OF SHOWERS AND THUNDERSTORMS WITH MODERATE RAINS 
6 MILES NORTHWEST OF NORTHWOOD...OR ABOUT 26 MILES NORTH OF MASON 
CITY...MOVING NORTHEAST AT 25 MPH.

SCATTERED SLOW MOVING SHOWERS AND STORMS WILL CONTINUE TO AFFECT THE 
WARNING AREA THROUGH AT LEAST MIDNIGHT.  RAINFALL RATES HAVE 
DIMINISHED TO BELOW AN INCH PER HOUR IN MOST LOCATIONS...BUT THESE 
ADDITIONAL RAINS MAY KEEP ANY HIGH WATER AREAS FROM SUBSIDING.

ALTHOUGH NO FLOODING HAS BEEN REPORTED...DOPPLER RADAR DATA COMBINED 
WITH NEARBY RAIN GAUGES ESTIMATE THAT ANYWHERE FROM 1 TO 3 INCHES OF 
RAIN HAS FALLEN ACROSS PORTIONS OF WINNEBAGO AND WORTH COUNTIES 
SINCE 600 PM.  PLEASE REPORT ANY INSTANCES OF FLASH FLOODING TO 
LOCAL LAW ENFORCEMENT FOR RELAY TO THE NATIONAL WEATHER SERVICE.

FLASH FLOODS OCCUR QUICKLY...MOVE TO HIGHER GROUND.  AVOID WATER 
COVERED ROADS AS THE ROAD MAY BE WASHED OUT.  LESS THAN ONE FOOT OF 
FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD.

LAT...LON 4349 9396 4326 9396 4325 9304 4350 9303

$$

SMALL
000 
WGUS73 KDMX 090557
FFSDMX
IAC189-195-090715-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1256 AM CDT WED JUN 9 2004

...THE FLASH FLOOD WARNING WHICH WAS IN EFFECT FOR WINNEBAGO AND
WORTH COUNTIES UNTIL 1245 AM HAS BEEN ALLOWED TO EXPIRE...

RAINS HAVE ENDED OVER WORTH AND WINNEBAGO COUNTIES FOR THE TIME 
BEING.  NO FLOODING HAS BEEN REPORTED FROM PREVIOUS RAINS...SO THE 
WARNING HAS BEEN ALLOWED TO EXPIRE.

ADDITIONAL RAIN IS POSSIBLE OVERNIGHT HOWEVER.  THE COMBINATION OF 
DOPPLER RADAR DATA AND NEARBY RAIN GAUGES ESTIMATE THAT 1 TO 3 
INCHES OF RAIN FELL OVER THESE COUNTIES TUESDAY EVENING.  WITH THE 
GROUND QUITE SATURATED...ANY ADDITIONAL HEAVY RAIN COULD QUICKLY 
PRODUCE PONDING WATER ON ROADS...OR RISES IN SMALL STREAMS AND 
CREEKS.  MONITOR LATER NATIONAL WEATHER SERVICE FORECASTS AND 
STATEMENTS FOR UPDATED INFORMATION.

$$

SMALL

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 8, 7:52 PM CDTSevere Thunderstorm WarningDMXPocahontas38 min
Jun 8, 8:07 PM CDTSevere Thunderstorm WarningDMXWinnebago38 min
Jun 8, 8:21 PM CDTSevere Thunderstorm WarningDMXWorth39 min
Jun 8, 8:47 PM CDTFlash Flood WarningDMXWinnebago16 hr
Jun 8, 9:03 PM CDTSevere Thunderstorm WarningDMXWorth42 min
Jun 8, 9:26 PM CDTSevere Thunderstorm WarningDMXCerro Gordo49 min

Nearby

Flash Flood Warnings in Iowa, 2004Every flash flood warning in 2004

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.