Alert archive / Iowa / Flash Flood Warnings in 2016

Flash Flood Warning 23, NWS Des Moines, IA

August 29, 2016Humboldt County, Kossuth County, Wright County, Iowa

NWS Des Moines, IA issued this flash flood warning at Aug 29, 2016, 12:44 PM CDT for Humboldt County, Kossuth County, Wright 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
Aug 29, 2016, 12:44 PM CDT (17:44 UTC)
Expired
Aug 29, 2016, 6:45 PM CDT
In force
6 hr
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Flood severity
None

Counties Humboldt County, IA, Kossuth County, IA, Wright County, IA

The radar

The Des Moines radar (KDMX), 131 km from the middle of the area, began a volume at 17:47 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, 5.7 hours before the alert went out and 220 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 2016-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 278 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2016-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 93 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
278 J/kg
Mixed-layer CIN
-225 J/kg
Mixed-layer LCL
1423 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
93 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

008 
WGUS53 KDMX 291744
FFWDMX
IAC091-109-197-292345-
/O.NEW.KDMX.FF.W.0023.160829T1744Z-160829T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1244 PM CDT MON AUG 29 2016

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN KOSSUTH COUNTY IN NORTH CENTRAL IOWA...
  HUMBOLDT COUNTY IN NORTH CENTRAL IOWA...
  NORTHWESTERN WRIGHT COUNTY IN NORTH CENTRAL IOWA...

* UNTIL 645 PM CDT MONDAY

* AT 1243 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO THREE INCHES OF RAIN
  HAS ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  DAKOTA CITY...HUMBOLDT...EAGLE GROVE...GOLDFIELD...LIVERMORE...
  CORWITH...LU VERNE...RENWICK...THOR...ST. JOSEPH...HARDY...
  IRVINGTON...HUMBOLDT MUNICIPAL AIRPORT...FRANK A GOTCH STATE PARK
  AND EAGLE GROVE MUNICIPAL AIRPORT.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...FARMLAND...AND OTHER LOW LYING
SPOTS.

&&

LAT...LON 4301 9398 4300 9397 4291 9397 4291 9391
      4265 9374 4265 9427 4301 9425

$$

BEERENDS
2 follow-up statements
584 
WGUS73 KDMX 292102
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
402 PM CDT MON AUG 29 2016

IAC091-109-197-292345-
/O.CON.KDMX.FF.W.0023.000000T0000Z-160829T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KOSSUTH IA-HUMBOLDT IA-WRIGHT IA-
402 PM CDT MON AUG 29 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
SOUTHEASTERN KOSSUTH...HUMBOLDT AND NORTHWESTERN WRIGHT COUNTIES...

AT 400 PM CDT...ADDITIONAL THUNDERSTORMS ARE POSSIBLE THROUGH EARLY
EVENING...HOWEVER THE THUNDERSTORMS FROM EARLIER HAVE DIMINISHED.
VERY HEAVY RAIN HAS FALLEN ACROSS THE WARNED AREA WITH A TOTAL
AMOUNT OF 3 TO 4 INCHES IN SOME LOCATIONS. FLASH FLOODING IS
POSSIBLE DUE TO THE HEAVY RAINFALL FROM EARLIER THIS AFTERNOON.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
DAKOTA CITY...HUMBOLDT...EAGLE GROVE...GOLDFIELD...LIVERMORE...
CORWITH...LU VERNE...RENWICK...THOR...ST. JOSEPH...HARDY...
IRVINGTON...HUMBOLDT MUNICIPAL AIRPORT...FRANK A GOTCH STATE PARK AND
EAGLE GROVE MUNICIPAL AIRPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...FARMLAND...AND OTHER LOW LYING
SPOTS.

&&

LAT...LON 4301 9398 4300 9397 4291 9397 4291 9391
      4265 9374 4265 9427 4301 9425

$$

BEERENDS
935 
WGUS73 KDMX 292257
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
557 PM CDT MON AUG 29 2016

IAC091-109-197-292307-
/O.CAN.KDMX.FF.W.0023.000000T0000Z-160829T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KOSSUTH IA-HUMBOLDT IA-WRIGHT IA-
557 PM CDT MON AUG 29 2016

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN KOSSUTH...HUMBOLDT AND
NORTHWESTERN WRIGHT COUNTIES IS CANCELLED...

THE HEAVY RAIN HAS ENDED. FLOODING IS NO LONGER EXPECTED TO POSE A
THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 4301 9398 4300 9397 4291 9397 4291 9391
      4265 9374 4265 9427 4301 9425

$$

BEERENDS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 29, 11:53 AM CDTSpecial Weather StatementDMXCerro Gordo, Hancock, Humboldt, Kossuth, Winnebago, Worth and 1 more52 min
Aug 29, 3:09 PM CDTSpecial Weather StatementDMXHardin51 min
Aug 29, 3:44 PM CDTSpecial Weather StatementDMXGrundy61 min
Aug 29, 3:59 PM CDTSevere Thunderstorm WarningDMXGrundy46 min
Aug 29, 4:05 PM CDTSpecial Weather StatementDMXPolk40 min
Aug 29, 4:56 PM CDTSpecial Weather StatementDMXTama34 min
Aug 29, 4:59 PM CDTSpecial Weather StatementDMXTama31 min
Aug 29, 5:08 PM CDTSpecial Weather StatementDMXBoone, Dallas, Guthrie, Story52 min
Aug 29, 5:25 PM CDTFlash Flood WarningDMXBoone, Story6 hr

Nearby

Flash Flood Warnings in Iowa, 2016Every flash flood warning in 2016

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.