Alert archive / Iowa / Flash Flood Warnings in 2013

Flash Flood Warning 13, NWS Quad Cities, IA

May 26, 2013Iowa County, Keokuk County, Washington County, Iowa

NWS Quad Cities, IA issued this flash flood warning at May 26, 2013, 4:29 AM CDT for Iowa County, Keokuk County, Washington County, Iowa. It was in force for 6 hr. 3 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
May 26, 2013, 4:29 AM CDT (09:29 UTC)
Expired
May 26, 2013, 10:30 AM CDT
In force
6 hr
Issued by
NWS Quad Cities, IA
Area
Storm-based polygon
Flood severity
None

Counties Iowa County, IA, Keokuk County, IA, Washington County, IA

The radar

The Des Moines radar (KDMX), 127 km from the middle of the area, began a volume at 09:32 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.

What was reported inside it

TimeReportWhereRemark
May 26, 6:30 AM CDTFLASH FLOOD4 E What Cheer, IAHAVE RECEIVED HEAVY RAINFALL OVERNIGHT WITH 2.5 SO FAR THAT HAS FALLEN. ALSO SEEING AREA CREEKS OUT OF THEIR BANKS AND FLOODING OR FLASH FLOODING OCCURRING. ALSO RECEIVED 1 OF RAINFALL YESTERDAY...SO HAVE RECEIVED 3.5 OF RAIN OVER THE PAST TWO DAYS SO FAR. STI
May 26, 7:00 AM CDTHEAVY RAIN 3Brighton, IA24 HOUR TOTAL.
May 26, 7:20 AM CDTHEAVY RAIN 1.44North English, IA24 HOUR TOTAL.

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 00:00Z, 9.5 hours before the alert went out and 146 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, Davenport, at 00:00Z on 2013-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Davenport, at 00:00Z on 2013-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
551 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
172 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.

403 
WGUS53 KDVN 260929
FFWDVN
IAC095-107-183-261530-
/O.NEW.KDVN.FF.W.0013.130526T0929Z-130526T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
429 AM CDT SUN MAY 26 2013

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN IOWA COUNTY IN EAST CENTRAL IOWA...
  KEOKUK COUNTY IN SOUTHEAST IOWA...
  THIS INCLUDES THE CITY OF SIGOURNEY...
  SOUTHWESTERN WASHINGTON COUNTY IN SOUTHEAST IOWA...

* UNTIL 1030 AM CDT

* AT 424 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  NEARLY STATIONARY THUNDERSTORMS WITH HEAVY RAINFALL AND FLASH
  FLOODING OVER THE WARNED AREA. OVERNIGHT RAINFALL TOTALS OF 2 TO 3
  INCHES HAS FALLEN OVER MUCH OF THE AREA SINCE 11 PM.  

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WHAT
  CHEER...SOUTH ENGLISH...KINROSS...KESWICK...HARPER...NORTH ENGLISH
  AND MILLERSBURG.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL OF 1 TO 2 INCHES OVER THE NEXT SEVERAL HOURS 
FROM NEARLY STATIONARY THUNDERSTORMS CAN BE EXPECTED. 

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

IF YOU ARE CAMPING NEAR A STREAM...CREEK OR OTHER LOW LYING AREA...
MOVE IMMEDIATELY TO HIGHER GROUND.

&&

LAT...LON 4151 9241 4152 9230 4162 9230 4163 9229
      4150 9197 4116 9174 4116 9218 4136 9242
      4151 9242

$$

SHEETS
2 follow-up statements
710 
WGUS73 KDVN 261206
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
706 AM CDT SUN MAY 26 2013

IAC095-107-183-261530-
/O.CON.KDVN.FF.W.0013.000000T0000Z-130526T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON IA-KEOKUK IA-IOWA IA-
706 AM CDT SUN MAY 26 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 AM CDT FOR
SOUTHWESTERN IOWA...KEOKUK AND SOUTHWESTERN WASHINGTON COUNTIES...

AT 650 AM CDT...DOPPLER RADAR CONTINUED TO INDICATE A NEARLY 
STATIONARY LINE OF THUNDERSTORMS ACROSS SOUTHEAST IOWA FROM 
NEWTON...THROUGH SIGOURNEY TO NEAR MOUNT PLEASANT. DOPPLER RADAR AND 
TRAINED SPOTTERS INDICATED FROM 3 TO 5 INCHES OF RAIN HAD FALLEN 
OVERNIGHT ALONG AND NORTHEAST OF A LINE FROM THORNBURG THROUGH 
SIGOURNEY TO BRIGHTON. FLASH FLOODING WAS REPORTED IN THE WHAT CHEER 
AREA WHERE CREEKS WERE OUT OF THEIR BANKS. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SOUTH
ENGLISH...KINROSS...KESWICK...NORTH ENGLISH AND MILLERSBURG.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS UP TO 1 INCH WILL BE POSSIBLE THIS EARLY 
THIS MORNING. 

FLOODING OF SMALL STREAMS AND CREEKS...COUNTY ROADS...AND LOW LYING
FARMLAND IS LIKELY.

IF YOU ARE CAMPING NEAR A STREAM...CREEK OR OTHER LOW LYING AREA...
MOVE IMMEDIATELY TO HIGHER GROUND.

&&

LAT...LON 4151 9241 4152 9230 4162 9230 4163 9229
      4150 9197 4116 9174 4116 9218 4136 9242
      4151 9242

$$
SHEETS
211 
WGUS73 KDVN 261525
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1025 AM CDT SUN MAY 26 2013

IAC095-107-183-261534-
/O.EXP.KDVN.FF.W.0013.000000T0000Z-130526T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON IA-KEOKUK IA-IOWA IA-
1025 AM CDT SUN MAY 26 2013

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1030 AM CDT FOR
SOUTHWESTERN IOWA...KEOKUK AND SOUTHWESTERN WASHINGTON COUNTIES...

THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE AS THE THREAT FOR 
ADDITIONAL FLASH FLOODING HAS ENDED. 

LAT...LON 4151 9241 4152 9230 4162 9230 4163 9229
      4150 9197 4116 9174 4116 9218 4136 9242
      4151 9242

$$

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 25, 8:34 PM CDTRiver Flood WarningDVNLee4 days
May 25, 9:14 PM CDTRiver Flood WarningDVNClinton, Scott18 days
May 25, 9:19 PM CDTRiver Flood WarningDVNJohnson, Washington5 days
May 25, 9:19 PM CDTRiver Flood WarningDVNKeokuk10 days
May 25, 9:50 PM CDTRiver Flood WarningDVNDes Moines, Louisa25 days
May 26, 3:06 AM CDTFlash Flood WatchDVNBenton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more56 hr
May 26, 8:41 AM CDTFlash Flood WarningDVNDes Moines, Henry, Jefferson, Louisa, Washington6 hr
May 26, 2:50 PM CDTSpecial Weather StatementDVNHenry55 min
May 26, 4:40 PM CDTFlash Flood WarningDVNCedar, Muscatine, Scott9 hr
May 26, 4:45 PM CDTFlash Flood WarningDVNJones6 hr
May 26, 4:52 PM CDTFlash Flood WarningDVNBenton, Cedar, Iowa, Johnson, Linn, Muscatine9 hr

Nearby

Flash Flood Warnings in Iowa, 2013Every flash flood warning in 2013

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.