Alert archive / Iowa / Flash Flood Warnings in 2016

Flash Flood Warning 17, NWS Des Moines, IA

August 1, 20165 counties in Iowa

NWS Des Moines, IA issued this flash flood warning at Aug 1, 2016, 9:02 AM CDT for 5 counties in Iowa. It was in force for 6 hr. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 1, 2016, 9:02 AM CDT (14:02 UTC)
Expired
Aug 1, 2016, 3:00 PM CDT
In force
6 hr
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Flood severity
None

Counties Adair County, IA, Guthrie County, IA, Madison County, IA, Ringgold County, IA, Union County, IA

The radar

The Des Moines radar (KDMX), 78 km from the middle of the area, began a volume at 14:02 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.

What was reported inside it

TimeReportWhereRemark
Aug 1, 10:42 AM CDTHEAVY RAIN 4.662 Nne Casey, IAVIEWER MEASUREMENT RELAYED BY KCCI-TV.
Aug 1, 2:20 PM CDTHEAVY RAIN 5.2Greenfield, IAVIEWER MEASUREMENT RELAYED BY WHO-TV.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 2.0 hours before the alert went out and 165 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 12:00Z on 2016-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 780 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, Omaha, NE at 12:00Z on 2016-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 465 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
780 J/kg
Mixed-layer CIN
-471 J/kg
Mixed-layer LCL
926 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
465 m²/s²
0-3 km storm-relative helicity
494 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

615 
WGUS53 KDMX 011402
FFWDMX
IAC001-077-121-159-175-012000-
/O.NEW.KDMX.FF.W.0017.160801T1402Z-160801T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
902 AM CDT MON AUG 1 2016

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN MADISON COUNTY IN SOUTH CENTRAL IOWA...
  SOUTHERN GUTHRIE COUNTY IN WEST CENTRAL IOWA...
  UNION COUNTY IN SOUTH CENTRAL IOWA...
  NORTHERN RINGGOLD COUNTY IN SOUTH CENTRAL IOWA...
  ADAIR COUNTY IN SOUTHWESTERN IOWA...

* UNTIL 300 PM CDT

* AT 901 AM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. AS MUCH AS 5 TO 6 INCHES OF
  RAIN HAS FALLEN OVER THE PAST 6 HOURS...WITH THE HEAVIEST AMOUNTS
  IN SOUTHERN ADAIR AND NORTHERN UNION COUNTIES. FLASH FLOODING IS
  EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CRESTON...GREENFIELD...STUART...GREEN VALLEY LAKE...AFTON...
  ADAIR...FONTANELLE...CASEY...ORIENT...LORIMOR...MENLO...
  MACKSBURG...CROMWELL...ARISPE...SHANNON CITY...KENT...THAYER...
  GREENFIELD MUNICIPAL AIRPORT...NODAWAY PARK AND GREEN VALLEY LAKE
  STATE PARK.

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 4116 9447 4116 9458 4141 9470 4162 9469
      4168 9442 4131 9416 4116 9401 4088 9401
      4088 9447

$$

ZOGG
1 follow-up statement
370 
WGUS73 KDMX 011717
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1217 PM CDT MON AUG 1 2016

IAC001-077-121-159-175-012000-
/O.CON.KDMX.FF.W.0017.000000T0000Z-160801T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MADISON IA-GUTHRIE IA-UNION IA-RINGGOLD IA-ADAIR IA-
1217 PM CDT MON AUG 1 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR
SOUTHWESTERN MADISON...SOUTHERN GUTHRIE...UNION...NORTHERN RINGGOLD
AND ADAIR COUNTIES...

AT 1212 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS CONTINUING TO
PRODUCE HEAVY RAIN ACROSS THE WARNED AREA. RADAR ESTIMATES INDICATE
THAT AS MUCH AS 4 TO 6.5 INCHES HAS FALLEN ACROSS THE WARNED AREA.
ALTHOUGH NO REPORTS OF FLASH FLOODING HAVE BEEN RECEIVED YET...FLASH
FLOODING REMAINS A DISTRICT POSSIBILITY.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
CRESTON...GREENFIELD...STUART...GREEN VALLEY LAKE...AFTON...ADAIR...
FONTANELLE...CASEY...ORIENT...LORIMOR...MENLO...MACKSBURG...
CROMWELL...ARISPE...SHANNON CITY...KENT...THAYER...GREENFIELD
MUNICIPAL AIRPORT...NODAWAY PARK AND GREEN VALLEY LAKE STATE PARK.

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 4116 9447 4116 9458 4141 9470 4162 9469
      4168 9442 4131 9416 4116 9401 4088 9401
      4088 9447

$$

ZOGG

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 4:08 AM CDTFlash Flood WarningDMXRinggold, Taylor6 hr
Aug 1, 7:36 AM CDTSpecial Weather StatementDMXCalhoun, Carroll, Greene, Pocahontas, Sac54 min
Aug 1, 10:12 AM CDTAreal Flood WarningDMXRinggold, Taylor24 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.