Alert archive / Iowa / Flash Flood Warnings in 2014

Flash Flood Warning 2, NWS Des Moines, IA

May 11, 20144 counties in Iowa

NWS Des Moines, IA issued this flash flood warning at May 11, 2014, 9:30 PM CDT for 4 counties in 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: May 11, 2014, 9:30 PM CDT (02:30 UTC)
Expired: May 12, 2014, 3:30 AM CDT
In force: 6 hr
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Flood severity: None

Counties Audubon County, IA, Carroll County, IA, Cass County, IA, Crawford County, IA

The radar

The Des Moines radar (KDMX), 104 km from the middle of the area, began a volume at 02:32 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, 2.5 hours before the alert went out and 123 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: 2520 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 967 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 274 m²/s²
0-3 km storm-relative helicity: 254 m²/s²
Significant tornado parameter: 4.5
Supercell composite: 18.8

Open this sounding in Storm Lab

The text

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

177 
WGUS53 KDMX 120230
FFWDMX
IAC009-027-029-047-120830-
/O.NEW.KDMX.FF.W.0002.140512T0230Z-140512T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
930 PM CDT SUN MAY 11 2014

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN CRAWFORD COUNTY IN WEST CENTRAL IOWA...
  CASS COUNTY IN SOUTHWEST IOWA...
  SOUTHWESTERN CARROLL COUNTY IN WEST CENTRAL IOWA...
  AUDUBON COUNTY IN WEST CENTRAL IOWA...

* UNTIL 330 AM CDT MONDAY
    
* AT 929 PM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN ACROSS MUCH OF WEST CENTRAL IOWA WITH UP TO TWO INCHES 
  OF RAIN HAVING ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN 
  SHORTLY. AN ADDITIONAL INCH OR TWO OR RAIN IS POSSIBLE THROUGH 11 
  PM CDT.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ATLANTIC...AUDUBON...MANNING...GRISWOLD...ANITA...EXIRA...
  MANILLA...ELK HORN...LEWIS...TEMPLETON...MASSENA...KIMBALLTON...
  DEDHAM...CUMBERLAND...HALBUR...BRAYTON...MARNE...WIOTA...GRAY AND
  ASPINWALL.

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.

&&

LAT...LON 4204 9495 4187 9472 4186 9474 4161 9474
      4160 9471 4116 9470 4116 9516 4150 9516
      4151 9504 4160 9504 4160 9509 4186 9509
      4186 9523 4200 9524

$$

BEERENDS

4 follow-up statements

932 
WGUS73 KDMX 120357
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1057 PM CDT SUN MAY 11 2014

IAC009-027-029-047-120830-
/O.CON.KDMX.FF.W.0002.000000T0000Z-140512T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CRAWFORD IA-CASS IA-CARROLL IA-AUDUBON IA-
1057 PM CDT SUN MAY 11 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 330 AM CDT MONDAY
FOR SOUTHEASTERN CRAWFORD...CASS...SOUTHWESTERN CARROLL AND AUDUBON
COUNTIES...

AT 1056 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
ALREADY FALLEN.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
ATLANTIC...AUDUBON...MANNING...GRISWOLD...ANITA...EXIRA...MANILLA...
ELK HORN...LEWIS...TEMPLETON...MASSENA...KIMBALLTON...DEDHAM...
CUMBERLAND...HALBUR...BRAYTON...MARNE...WIOTA...GRAY AND ASPINWALL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4204 9495 4187 9472 4186 9474 4161 9474
      4160 9471 4116 9470 4116 9516 4150 9516
      4151 9504 4160 9504 4160 9509 4186 9509
      4186 9523 4200 9524

$$

SKOW

842 
WGUS73 KDMX 120510
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1210 AM CDT MON MAY 12 2014

IAC009-027-029-047-120830-
/O.CON.KDMX.FF.W.0002.000000T0000Z-140512T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CRAWFORD IA-CASS IA-CARROLL IA-AUDUBON IA-
1210 AM CDT MON MAY 12 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 330 AM CDT MONDAY
FOR SOUTHEASTERN CRAWFORD...CASS...SOUTHWESTERN CARROLL AND AUDUBON
COUNTIES...

WHILE THUNDERSTORMS AND HEAVY RAINFALL HAVE MOVED OUT OF THE WARNED
AREA...THE THREAT FOR LOCALIZED FLASH FLOODING STILL EXISTS...
ESPECIALLY IN CASS COUNTY. UP TO TWO INCHES OF RAIN HAVE ALREADY 
FALLEN.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
ATLANTIC...AUDUBON...MANNING...GRISWOLD...ANITA...EXIRA...MANILLA...
ELK HORN...LEWIS...TEMPLETON...MASSENA...KIMBALLTON...DEDHAM...
CUMBERLAND...HALBUR...BRAYTON...MARNE...WIOTA...GRAY AND ASPINWALL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4204 9495 4187 9472 4186 9474 4161 9474
      4160 9471 4116 9470 4116 9516 4150 9516
      4151 9504 4160 9504 4160 9509 4186 9509
      4186 9523 4200 9524

$$

SKOW

948 
WGUS73 KDMX 120610
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
110 AM CDT MON MAY 12 2014

IAC009-027-047-120618-
/O.CAN.KDMX.FF.W.0002.000000T0000Z-140512T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CRAWFORD IA-CARROLL IA-AUDUBON IA-
110 AM CDT MON MAY 12 2014

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN CRAWFORD...SOUTHWESTERN
CARROLL AND AUDUBON COUNTIES IS CANCELLED...

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

LAT...LON 4150 9516 4151 9504 4150 9504 4150 9471
      4116 9470 4116 9516

$$

IAC029-120830-
/O.CON.KDMX.FF.W.0002.000000T0000Z-140512T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CASS IA-
110 AM CDT MON MAY 12 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 330 AM CDT MONDAY
FOR CASS COUNTY...

WHILE THUNDERSTORMS AND HEAVY RAINFALL HAVE MOVED OUT OF THE WARNED
AREA...THE THREAT FOR LOCALIZED FLASH FLOODING STILL EXISTS. 
UP TO TWO INCHES OF RAIN HAVE ALREADY FALLEN.

SOME LOCATIONS IN THE WARNING INCLUDE...
ATLANTIC...GRISWOLD...ANITA...LEWIS...MASSENA...CUMBERLAND...MARNE...
WIOTA...GRISWOLD PARK...LAKE ANITA STATE PARK...ATLANTIC MUNICIPAL
AIRPORT...ANITA MUNICIPAL AIRPORT AND COLD SPRINGS STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4150 9516 4151 9504 4150 9504 4150 9471
      4116 9470 4116 9516

$$

SKOW

126 
WGUS73 KDMX 120824
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
324 AM CDT MON MAY 12 2014

IAC029-120833-
/O.EXP.KDMX.FF.W.0002.000000T0000Z-140512T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CASS IA-
324 AM CDT MON MAY 12 2014

...THE FLASH FLOOD WARNING FOR CASS COUNTY WILL EXPIRE AT 330 AM
CDT...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE
A THREAT. ADDITIONAL THUNDERSTORMS MAY DEVELOP OVER THE AREA THROUGH
THE EARLY MORNING HOURS AND BRING LOCALLY HEAVY RAIN. A FLASH FLOOD
WATCH REMAINS IN EFFECT UNTIL 700 AM.

LAT...LON 4150 9516 4151 9504 4150 9504 4150 9471
      4116 9470 4116 9516

$$

SKOW

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 7:58 PM CDT	Special Weather Statement	DMX	Adair, Audubon, Carroll, Cass, Crawford, Guthrie	2 hr
May 11, 8:08 PM CDT	Severe Thunderstorm Warning	DMX	Emmet, Kossuth	37 min
May 11, 8:24 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Carroll, Cass, Crawford	66 min
May 11, 9:05 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Cass	40 min
May 11, 9:15 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Crawford, Greene, Sac	45 min
May 11, 9:21 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Audubon, Carroll, Dallas, Greene, Guthrie	39 min
May 11, 9:45 PM CDT	Tornado Warning	DMX	Dallas, Guthrie	30 min
May 11, 9:59 PM CDT	Tornado Warning	DMX	Boone, Dallas, Greene, Guthrie	46 min
May 11, 10:03 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Boone, Dallas, Greene, Guthrie, Hamilton and 6 more	57 min
May 11, 10:26 PM CDT	Tornado Warning	DMX	Dallas, Polk, Story	34 min
May 11, 10:45 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Cass	45 min
May 11, 10:47 PM CDT	Tornado Warning	DMX	Boone, Hamilton, Story	28 min
May 11, 10:55 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Hamilton, Hardin, Jasper, Marion, Marshall and 3 more	65 min
May 11, 11:13 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Cass, Union	47 min
May 12, 12:31 AM CDT	Flash Flood Warning	DMX	Adair	6 hr
May 12, 12:47 AM CDT	Severe Thunderstorm Warning	DMX	Clarke, Ringgold, Union	43 min
May 12, 1:32 AM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Marion, Warren	43 min
May 12, 3:05 AM CDT	Special Weather Statement	DMX	Carroll	25 min
May 12, 4:45 AM CDT	Special Weather Statement	DMX	Hardin	30 min
May 12, 9:34 AM CDT	Special Weather Statement	DMX	Mahaska, Monroe, Wayne	56 min
May 12, 10:34 AM CDT	Flash Flood Watch	DMX	Appanoose, Black Hawk, Bremer, Butler, Clarke, Davis and 14 more	7 hr
May 12, 1:39 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur, Ringgold, Wayne	36 min
May 12, 2:47 PM CDT	Flash Flood Warning	DMX	Lucas	6 hr
May 12, 3:14 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Marion, Monroe, Poweshiek, Wapello	46 min
May 12, 3:36 PM CDT	Severe Thunderstorm Warning	DMX	Davis	39 min
May 12, 4:18 PM CDT	Flash Flood Warning	DMX	Marion, Monroe	6 hr

Nearby

Flash Flood Warnings in Iowa, 2014 Every 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.