Alert archive / Iowa / Flash Flood Warnings in 2007

Flash Flood Warning 3, NWS Des Moines, IA

October 14, 2007Dallas County, Iowa

NWS Des Moines, IA issued this flash flood warning at Oct 14, 2007, 8:40 PM CDT for Dallas County, Iowa. It was in force for 6 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
Oct 14, 2007, 8:40 PM CDT (01:40 UTC)
Expired
Oct 15, 2007, 2:45 AM CDT
In force
6 hr
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Flood severity
None

County Dallas County, IA

The radar

The Des Moines radar (KDMX), 40 km from the middle of the area, began a volume at 01:42 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

Omaha, NE (KOAX), launched 00:00Z, 1.7 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, Omaha, NE at 00:00Z on 2007-10-15Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 00:00Z on 2007-10-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 358 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
490 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
358 m²/s²
0-3 km storm-relative helicity
408 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 
WGUS53 KDMX 150147
FFWDMX
IAC049-150745-
/O.NEW.KDMX.FF.W.0003.071015T0140Z-071015T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
845 PM CDT SUN OCT 14 2007

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DALLAS COUNTY IN CENTRAL IOWA...

* UNTIL 245 AM CDT MONDAY.

* AT 837 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  HEAVY SHOWERS AND THUNDERSTORMS MOVING NORTHEAST ACROSS MUCH OF    
  THE NORTHWEST HALF OF DALLAS COUNTY...WITH ADDITIONAL MODERATE TO  
  HEAVY RAIN TO FOLLOW. RAINFALL RATES OF AN INCH TO ONE AND A HALF  
  INCHES PER HOUR OR GREATER HAVE BEEN OBSERVED WITH THIS BAND OF    
  STORMS AND THIS MAGNITUDE OF RAINFALL WILL LIKELY CAUSE FLASH      
  FLOODING. AREAS AROUND LINDEN NORTHEAST TOWARD PANTHER AND PANTHER 
  CREEK ARE OF GREATEST CONCERN FOR FLASH FLOODING. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO DALLAS     
  CENTER...MINBURN...REDFIELD AND ADEL.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE 
WARNED AREA INTO THE EARLY MORNING HOURS.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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. MOVE TO HIGHER GROUND.

LAT...LON 4163 9429 4180 9429 4186 9382 4165 9382
      4151 9425 4160 9425 4160 9429 4162 9430
      4163 9430
TIME...MOT...LOC 0140Z 180DEG 0KT 4166 9418

$$

MOYER
2 follow-up statements
000 
WGUS73 KDMX 150247
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
943 PM CDT SUN OCT 14 2007

IAC049-150745-
/O.CON.KDMX.FF.W.0003.000000T0000Z-071015T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DALLAS IA-
943 PM CDT SUN OCT 14 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 AM CDT FOR
DALLAS COUNTY...

AT 937 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE MODERATE TO HEAVY RAIN FROM SHOWERS AND THUNDERSTORMS OVER 
NORTHERN AND CENTRAL DALLAS COUNTY. ESTIMATED RAINFALL RATES OF UP 
TO ONE INCH PER HOUR HAVE CONTINUED SINCE 845 PM...BUT ARE SHOWING 
SIGNS OF LETTING UP A BIT. HOWEVER...ADDITIONAL MODERATE TO HEAVY 
RAIN TO THE SOUTHWEST IS EXPECTED TO CONTINUE MOVING NORTHEAST INTO 
THE EARLY MORNING HOURS. OF PARTICULAR CONCERN FOR FLASH FLOODING 
ARE THE PANTHER CREEK AND SLOUGH CREEK BASINS AND HIGHWAY 44 WEST OF 
DALLAS CENTER.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO DALLAS 
CENTER...MINBURN...REDFIELD AND ADEL.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND 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. MOVE TO HIGHER GROUND.

LAT...LON 4163 9429 4180 9429 4186 9382 4165 9382
      4151 9425 4160 9425 4160 9429 4162 9430
      4163 9430
TIME...MOT...LOC 0243Z 180DEG 0KT 4166 9418

$$

MOYER
000 
WGUS73 KDMX 150333
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1032 PM CDT SUN OCT 14 2007

IAC049-150337-
/O.CAN.KDMX.FF.W.0003.000000T0000Z-071015T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DALLAS IA-
1032 PM CDT SUN OCT 14 2007

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR DALLAS COUNTY...

AT 1025 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED THAT 
RAINFALL RATES OVER DALLAS COUNTY HAVE DIMINISHED QUITE A BIT...AND 
THERE IS NO LONGER AN IMMEDIATE THREAT FOR FLASH FLOODING. 
HOWEVER...ONE TO TWO INCHES OF RAIN HAS FALLEN IN AN AXIS FROM 
MINBURN TO LINDEN SINCE 7 PM...AND IF ADDITIONAL MODERATE TO HEAVY 
RAIN MOVES INTO DALLAS COUNTY LATER TONIGHT...A FLASH FLOOD WARNING 
MAY ONCE AGAIN BE REQUIRED. A FLASH FLOOD WATCH DOES REMAIN IN 
EFFECT FOR DALLAS COUNTY THROUGH MONDAY AFTERNOON.

LAT...LON 4163 9429 4180 9429 4186 9382 4165 9382
      4151 9425 4160 9425 4160 9429 4162 9430
      4163 9430
TIME...MOT...LOC 0327Z 180DEG 0KT 4166 9418

$$

MOYER

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 14, 8:05 PM CDTRiver Flood WarningDMXMahaska26 hr
Oct 14, 8:17 PM CDTFlash Flood WarningDMXAdair, Guthrie6 hr
Oct 14, 8:49 PM CDTRiver Flood WarningDMXBoone, Hamilton, Webster25 hr
Oct 14, 8:49 PM CDTRiver Flood WarningDMXHumboldt, Kossuth37 hr
Oct 14, 8:49 PM CDTRiver Flood WarningDMXHumboldt13 hr
Oct 14, 8:49 PM CDTRiver Flood WarningDMXMadison, Warren13 hr
Oct 14, 9:12 PM CDTRiver Flood WarningDMXDallas13 hr
Oct 14, 9:45 PM CDTRiver Flood WarningDMXCerro Gordo, Floyd, Worth12 hr
Oct 15, 12:29 AM CDTRiver Flood WarningDMXCass12 hr
Oct 15, 5:15 AM CDTRiver Flood WarningDMXDallas, Polk17 hr
Oct 15, 11:45 AM CDTRiver Flood WarningDMXPolk22 hr
Oct 15, 11:45 AM CDTRiver Flood WarningDMXPolk25 hr

Nearby

Flash Flood Warnings in Iowa, 2007Every flash flood warning in 2007

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.