Alert archive / Iowa / Flash Flood Warnings in 2014

Flash Flood Warning 21, NWS Des Moines, IA

June 18, 2014Hancock County, Humboldt County, Kossuth County, Iowa

NWS Des Moines, IA issued this flash flood warning at Jun 18, 2014, 3:35 AM CDT for Hancock County, Humboldt County, Kossuth County, Iowa. It was in force for 5 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 18, 2014, 3:35 AM CDT (08:35 UTC)
Expired
Jun 18, 2014, 9:00 AM CDT
In force
5 hr
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Flood severity
None

Counties Hancock County, IA, Humboldt County, IA, Kossuth County, IA

The radar

The Des Moines radar (KDMX), 152 km from the middle of the area, began a volume at 08:35 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, 8.6 hours before the alert went out and 200 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 2014-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 901 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 2014-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -31 square meters per square second.193958Sfc1 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
901 J/kg
Mixed-layer CIN
-172 J/kg
Mixed-layer LCL
1176 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
-31 m²/s²
0-3 km storm-relative helicity
71 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.6

Open this sounding in Storm Lab

The text

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

204 
WGUS53 KDMX 180835
FFWDMX
IAC081-091-109-181400-
/O.NEW.KDMX.FF.W.0021.140618T0835Z-140618T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
335 AM CDT WED JUN 18 2014

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN HUMBOLDT COUNTY IN NORTH CENTRAL IOWA...
  SOUTHERN KOSSUTH COUNTY IN NORTH CENTRAL IOWA...
  WESTERN HANCOCK COUNTY IN NORTH CENTRAL IOWA...

* UNTIL 900 AM CDT
    
* AT 334 AM CDT...DOPPLER RADAR INDICATED A THUNDERSTORMS PRODUCING 
  HEAVY RAIN ACROSS KOSSUTH AND HANCOCK COUNTIES. UP TO ONE INCH OF 
  RAIN HAS ALREADY FALLEN. FLASH FLOODING IS ONGOING OR EXPECTED TO 
  BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BRITT...WEST BEND...KANAWHA...TITONKA...WESLEY...CORWITH...LU
  VERNE...CRYSTAL LAKE...WODEN...ST. JOSEPH...OTTOSEN...ST.
  BENEDICT...IRVINGTON...SEXTON AND HUTCHINS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4326 9397 4325 9379 4291 9379 4291 9397
      4288 9398 4289 9444 4296 9444 4304 9409
      4324 9409 4326 9400

$$

AWB
2 follow-up statements
165 
WGUS73 KDMX 181036
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
536 AM CDT WED JUN 18 2014

IAC081-091-109-181400-
/O.CON.KDMX.FF.W.0021.000000T0000Z-140618T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HUMBOLDT IA-KOSSUTH IA-HANCOCK IA-
536 AM CDT WED JUN 18 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 AM CDT FOR
NORTHERN HUMBOLDT...SOUTHERN KOSSUTH AND WESTERN HANCOCK COUNTIES...

AT 536 AM CDT...DOPPLER RADAR INDICATED HEAVY RAIN HAD FALLEN ACROSS 
THE WARNED AREA. UP TO ONE INCH OF RAIN HAS ALREADY FALLEN. FLASH 
FLOODING IS ONGOING OR EXPECTED TO BEGIN SHORTLY.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
BRITT...WEST BEND...KANAWHA...TITONKA...WESLEY...CORWITH...LU
VERNE...CRYSTAL LAKE...WODEN...ST. JOSEPH...OTTOSEN...ST. BENEDICT...
IRVINGTON...SEXTON AND HUTCHINS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4326 9397 4325 9379 4291 9379 4291 9397
      4288 9398 4289 9444 4296 9444 4304 9409
      4324 9409 4326 9400

$$

AWB
331 
WGUS73 KDMX 181356
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
856 AM CDT WED JUN 18 2014

IAC081-091-109-181404-
/O.EXP.KDMX.FF.W.0021.000000T0000Z-140618T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HUMBOLDT IA-KOSSUTH IA-HANCOCK IA-
856 AM CDT WED JUN 18 2014

...THE FLASH FLOOD WARNING FOR NORTHERN HUMBOLDT...SOUTHERN KOSSUTH
AND WESTERN HANCOCK COUNTIES WILL EXPIRE AT 900 AM CDT...

THE HEAVY RAIN HAS ENDED AND FLOOD WATERS ARE RECEDING. FLOODING IS 
NO LONGER EXPECTED TO POSE A THREAT. HOWEVER...FLOODING REMAINS A 
CONCERN ALONG LOCAL WATERWAYS...INCLUDING THE EAST FORK OF THE DES 
MOINES RIVER. PLEASE CONTINUE TO HEED ANY ROAD CLOSURES.

THE GROUND REMAINS VERY SATURATED DUE TO THE MULTIPLE DAYS OF 
EXCESSIVE RAINFALL. ANY ADDITIONAL HEAVY RAINS IN THE NEXT FEW DAYS 
COULD QUICKLY RENEW THE FLASH FLOOD THREAT. PLEASE STAY TUNED TO 
YOUR LOCAL FORECAST AND ANY FUTURE WATCHES AND WARNINGS.

LAT...LON 4326 9397 4325 9379 4291 9379 4291 9397
      4288 9398 4289 9444 4296 9444 4304 9409
      4324 9409 4326 9400

$$

SKOW

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 1:40 AM CDTRiver Flood WarningDMXHumboldt, Kossuth5 days
Jun 18, 1:41 AM CDTSevere Thunderstorm WarningDMXEmmet, Palo Alto, Pocahontas49 min
Jun 18, 2:05 AM CDTSevere Thunderstorm WarningDMXEmmet, Kossuth, Palo Alto40 min
Jun 18, 2:26 AM CDTSevere Thunderstorm WarningDMXHumboldt, Kossuth, Palo Alto, Pocahontas34 min
Jun 18, 2:42 AM CDTSevere Thunderstorm WarningDMXHumboldt, Palo Alto, Pocahontas, Webster48 min
Jun 18, 2:45 AM CDTFlash Flood WarningDMXKossuth6 hr
Jun 18, 2:47 AM CDTSevere Thunderstorm WarningDMXCerro Gordo, Franklin, Hancock, Humboldt, Kossuth, Wright43 min
Jun 18, 3:01 AM CDTSevere Thunderstorm WarningDMXHumboldt, Kossuth, Palo Alto29 min
Jun 18, 3:11 AM CDTSevere Thunderstorm WarningDMXCerro Gordo, Winnebago, Worth49 min
Jun 18, 3:12 AM CDTFlash Flood WarningDMXPalo Alto, Pocahontas6 hr
Jun 18, 3:31 AM CDTSevere Thunderstorm WarningDMXCerro Gordo, Franklin, Hancock, Wright44 min
Jun 18, 5:06 AM CDTFlash Flood WarningDMXHumboldt, Wright6 hr
Jun 18, 6:47 AM CDTSpecial Weather StatementDMXFranklin, Wright118 min
Jun 18, 9:36 AM CDTAreal Flood WarningDMXKossuth, Palo Alto12 hr
Jun 18, 10:58 AM CDTAreal Flood WarningDMXHumboldt12 hr
Jun 18, 11:14 AM CDTRiver Flood WarningDMXBoone, Hamilton, Webster6 days
Jun 18, 11:14 AM CDTRiver Flood WarningDMXHumboldt5 days
Jun 18, 12:27 PM CDTAreal Flood WarningDMXWright9 hr
Jun 18, 4:02 PM CDTFlash Flood WatchDMXBlack Hawk, Boone, Bremer, Butler, Calhoun, Cerro Gordo and 18 more29 hr
Jun 18, 4:08 PM CDTRiver Flood WarningDMXBlack Hawk9 days

Nearby

Flash Flood Warnings in Iowa, 2014Every flash flood warning in 2014

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.