Alert archive / Iowa / Flash Flood Warnings in 2015

Flash Flood Warning 21, NWS Des Moines, IA

July 27, 2015Appanoose County, Wayne County, Iowa

NWS Des Moines, IA issued this flash flood warning at Jul 27, 2015, 4:00 PM CDT for Appanoose County, Wayne County, 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: Jul 27, 2015, 4:00 PM CDT (21:00 UTC)
Expired: Jul 27, 2015, 10:00 PM CDT
In force: 6 hr
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Flood severity: None

Counties Appanoose County, IA, Wayne County, IA

The radar

The Des Moines radar (KDMX), 121 km from the middle of the area, began a volume at 21:02 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

Time	Report	Where	Remark
Jul 27, 4:31 PM CDT	FLASH FLOOD	3 S Udell, IA	WATER OVER THE ROAD AT 2 LOCATIONS BETWEEN 265TH AVE AND 296TH AVE ON HIGHWAY 2. WATER FLOODING UNDERPASS AT HIGHWAY 2 AND 296TH AVE.
Jul 27, 4:44 PM CDT	HEAVY RAIN 2.75	Centerville, IA	RAIN FELL IN 45 MINUTES. OBSERVER LOCATION CENTERVILLE.

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

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.0 hours before the alert went out and 233 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 10 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 839 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 11 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.

837 
WGUS53 KDMX 272100
FFWDMX
IAC007-185-280300-
/O.NEW.KDMX.FF.W.0021.150727T2100Z-150728T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
400 PM CDT MON JUL 27 2015

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN WAYNE COUNTY IN SOUTH CENTRAL IOWA...
  APPANOOSE COUNTY IN SOUTH CENTRAL IOWA...

* UNTIL 1000 PM CDT MONDAY
    
* AT 359 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS WITH HEAVY 
  RAINFALL ACROSS THE WARNED AREA. AS MUCH AS 2 TO 4 INCHES OF RAIN 
  HAS ALREADY FALLEN. ANOTHER 1 TO 2 INCHES OF RAIN IS EXPECTED. 
  FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CENTERVILLE...CORYDON...LAKE SUNDOWN...RATHBUN LAKE...SEYMOUR...
  MORAVIA...MOULTON...MYSTIC...CINCINNATI...EXLINE...PROMISE CITY...
  UNIONVILLE...NUMA...RATHBUN...PLANO...UDELL...MILLERTON...
  CENTERVILLE MUNICIPAL AIRPORT...HONEY CREEK STATE PARK AND SHARON
  BLUFFS STATE PARK.

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 4090 9332 4090 9264 4059 9264 4058 9330

$$

ZOGG

2 follow-up statements

913 
WGUS73 KDMX 272146
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
446 PM CDT MON JUL 27 2015

IAC007-185-280300-
/O.CON.KDMX.FF.W.0021.000000T0000Z-150728T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAYNE IA-APPANOOSE IA-
446 PM CDT MON JUL 27 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT MONDAY
FOR EASTERN WAYNE AND APPANOOSE COUNTIES...

AT 439 PM CDT...DOPPLER RADAR INDICATED ADDITIONAL SHOWERS AND 
THUNDERSTORMS MOVING INTO THE WARNED AREA. AS MUCH AS 4 TO 6 INCHES 
OF RAIN HAS FALLEN ACROSS THE WARNED AREA. LAW ENFORCEMENT REPORTED 
THAT FLOOD WATERS WERE AFFECTING PORTIONS OF IOWA HIGHWAY 2 IN 
WESTERN APPANOOSE COUNTY. AS MUCH AS 1 MORE INCH OF RAINFALL IS 
POSSIBLE OVER THE NEXT FEW HOURS.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
CENTERVILLE...CORYDON...LAKE SUNDOWN...RATHBUN LAKE...SEYMOUR...
MORAVIA...MOULTON...MYSTIC...CINCINNATI...EXLINE...PROMISE CITY...
UNIONVILLE...NUMA...RATHBUN...PLANO...UDELL...MILLERTON...CENTERVILLE
MUNICIPAL AIRPORT...HONEY CREEK STATE PARK AND SHARON BLUFFS STATE
PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4090 9332 4090 9264 4059 9264 4058 9330

$$

ZOGG

249 
WGUS73 KDMX 280249
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
949 PM CDT MON JUL 27 2015

IAC007-185-280258-
/O.CAN.KDMX.FF.W.0021.000000T0000Z-150728T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAYNE IA-APPANOOSE IA-
949 PM CDT MON JUL 27 2015

...THE FLASH FLOOD WARNING FOR EASTERN WAYNE AND APPANOOSE COUNTIES
IS CANCELLED...

SIGNIFICANT FLOOD WATERS HAVE RECEDED...AND ARE NO LONGER EXPECTED 
TO POSE A THREAT TO LIFE OR PROPERTY. PLEASE CONTINUE TO HEED ANY 
ROAD CLOSURES DUE TO PREVIOUS STANDING OR PONDING WATER.

LAT...LON 4090 9332 4090 9264 4059 9264 4058 9330

$$

SMALL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 8:45 AM CDT	Special Weather Statement	DMX	Crawford	30 min
Jul 27, 10:15 AM CDT	Special Weather Statement	DMX	Carroll	45 min
Jul 27, 10:35 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Carroll, Greene, Guthrie	25 min
Jul 27, 10:58 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Dallas, Greene, Guthrie	47 min
Jul 27, 11:41 AM CDT	Special Weather Statement	DMX	Dallas, Polk	64 min
Jul 27, 12:13 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Polk, Story	32 min
Jul 27, 12:45 PM CDT	Special Weather Statement	DMX	Polk	45 min
Jul 27, 1:14 PM CDT	Special Weather Statement	DMX	Jasper, Marion, Warren	46 min
Jul 27, 2:12 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Lucas, Monroe, Wayne	48 min
Jul 27, 2:33 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Monroe, Wapello	42 min
Jul 27, 2:50 PM CDT	Special Weather Statement	DMX	Appanoose, Davis, Mahaska, Wapello	55 min
Jul 27, 3:08 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Monroe, Wapello	52 min
Jul 27, 3:15 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose	45 min
Jul 27, 3:44 PM CDT	Flash Flood Warning	DMX	Mahaska, Marion, Monroe	6 hr
Jul 27, 4:58 PM CDT	Flash Flood Warning	DMX	Appanoose, Davis, Mahaska, Monroe, Wapello	6 hr

Nearby

Flash Flood Warnings in Iowa, 2015 Every flash flood warning in 2015

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.