Alert archive / Iowa / Flash Flood Warnings in 2016

Flash Flood Warning 56, NWS La Crosse, WI

September 22, 2016Chickasaw County, Fayette County, Floyd County, Iowa

NWS La Crosse, WI issued this flash flood warning at Sep 22, 2016, 8:02 AM CDT for Chickasaw County, Fayette County, Floyd County, Iowa. It was in force for 5 hr. 5 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
Sep 22, 2016, 8:02 AM CDT (13:02 UTC)
Expired
Sep 22, 2016, 1:00 PM CDT
In force
5 hr
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Flood severity
None

Counties Chickasaw County, IA, Fayette County, IA, Floyd County, IA

The radar

The La Crosse radar (KARX), 128 km from the middle of the area, began a volume at 13:06 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
Sep 22, 8:30 AM CDTHEAVY RAIN 5.32Charles City, IAMESONET STATION CHARLES CITY-CEDAR RIVER /CCYI4/.
Sep 22, 8:44 AM CDTFLASH FLOOD2 Sw Charles City, IAWATER STILL RISING IN SOME AREAS WITH MANHOLE COVERS BLOWING OFF
Sep 22, 8:44 AM CDTFLASH FLOOD2 Sw Charles City, IAWATER STILL RISING IN SOME AREAS WITH MANHOLE COVERS BLOWING OFF.
Sep 22, 8:45 AM CDTHEAVY RAIN 6.572 Sse Bassett, IACO-OP OBSERVER STATION IONIA 2W /IONI4/.
Sep 22, 12:09 PM CDTFLASH FLOOD8 Sw West Union, IAWATER OVER NUMEROUS ROAD WAYS BETWEEN WEST UNION AND SUMNER

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, 1.0 hours before the alert went out and 212 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 12:00Z on 2016-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 114 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2016-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 147 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
114 J/kg
Mixed-layer CIN
-348 J/kg
Mixed-layer LCL
1393 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
147 m²/s²
0-3 km storm-relative helicity
145 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

480 
WGUS53 KARX 221302
FFWARX
IAC037-065-067-221800-
/O.NEW.KARX.FF.W.0056.160922T1302Z-160922T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
802 AM CDT THU SEP 22 2016

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FAYETTE COUNTY IN NORTHEASTERN IOWA...
  CHICKASAW COUNTY IN NORTHEASTERN IOWA...
  FLOYD COUNTY IN NORTH CENTRAL IOWA...

* UNTIL 100 PM CDT

* AT 800 AM CDT...HEAVY RAIN THAT FELL OVERNIGHT HAS LED TO
  WIDESPREAD FLOODING. THERE ARE NUMEROUS ROADS STILL WASHED OUT OR
  UNDER WATER. FLASH FLOODING IS STILL OCCURRING.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CHARLES CITY...OELWEIN...NEW HAMPTON...WEST UNION...NASHUA...NORA
  SPRINGS...FAYETTE...FREDERICKSBURG...ROCKFORD...ELGIN...CLERMONT...
  MAYNARD...HAWKEYE...LAWLER...ARLINGTON...RUDD...FLOYD...MARBLE
  ROCK...IONIA AND PROTIVIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT CROSS HIGH OR FLOWING WATER. TRAVEL COULD BE DANGEROUS TODAY
UNTIL WATER LEVEL SUBSIDE. 

&&

LAT...LON 4320 9302 4321 9208 4308 9208 4308 9161
      4265 9161 4264 9208 4291 9208 4291 9302

$$

SHEA
1 follow-up statement
638 
WGUS73 KARX 221602
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1102 AM CDT THU SEP 22 2016

IAC037-065-067-221800-
/O.CON.KARX.FF.W.0056.000000T0000Z-160922T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FAYETTE IA-CHICKASAW IA-FLOYD IA-
1102 AM CDT THU SEP 22 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 100 PM CDT FOR
FAYETTE...CHICKASAW AND FLOYD COUNTIES...

RAINFALL CONTINUES TO DWINDLE ON RADAR LATE THIS MORNING BUT
OVERNIGHT RAINFALL CONTINUES TO CAUSE LOTS OF FLOODING PROBLEMS IN
THE AREA.

BESIDES CLOSED ROADS...WATER CONTINUES TO RISE IN DRAINAGE AREAS AND
SOME ROUTES MAY BE IMPASSABLE.

USE EXTREME CAUTION IF YOU HAVE TRAVEL PLANNED IN NORTHEAST IOWA
TODAY.

LAT...LON 4320 9302 4321 9208 4308 9208 4308 9161
      4265 9161 4264 9208 4291 9208 4291 9302

$$

SHEA

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 21, 7:05 PM CDTFlash Flood WarningARXChickasaw5 hr
Sep 21, 7:11 PM CDTSevere Thunderstorm WarningARXFloyd49 min
Sep 21, 7:34 PM CDTTornado WarningARXFloyd41 min
Sep 21, 8:11 PM CDTFlash Flood Warning EmergencyARXFloyd8 hr
Sep 21, 8:44 PM CDTSpecial Weather StatementARXAllamakee, Winneshiek46 min
Sep 21, 9:19 PM CDTSpecial Weather StatementARXClayton, Fayette56 min
Sep 21, 10:13 PM CDTSpecial Weather StatementARXClayton, Fayette62 min
Sep 22, 12:04 AM CDTFlash Flood WarningARXChickasaw4 hr
Sep 22, 12:13 AM CDTSpecial Weather StatementARXAllamakee, Chickasaw, Floyd, Howard, Mitchell, Winneshiek2 hr
Sep 22, 12:48 AM CDTFlash Flood WarningARXAllamakee6 hr
Sep 22, 1:00 AM CDTFlash Flood WarningARXHoward, Mitchell, Winneshiek6 hr
Sep 22, 2:20 AM CDTFlash Flood WarningARXChickasaw, Fayette, Floyd6 hr
Sep 22, 3:55 AM CDTFlash Flood Warning EmergencyARXChickasaw, Floyd4 hr
Sep 22, 4:09 AM CDTFlash Flood WarningARXClayton6 hr
Sep 22, 4:53 AM CDTRiver Flood WarningARXMitchell3 days
Sep 22, 4:53 AM CDTRiver Flood WarningARXFloyd4 days
Sep 22, 5:39 AM CDTRiver Flood WarningARXAllamakee70 hr
Sep 22, 6:51 AM CDTFlash Flood WarningARXAllamakee3 hr
Sep 22, 7:00 AM CDTAreal Flood WarningARXHoward, Mitchell, Winneshiek6 hr
Sep 22, 9:00 AM CDTRiver Flood WarningARXClayton5 days
Sep 22, 9:00 AM CDTRiver Flood WarningARXClayton4 days
Sep 22, 9:38 AM CDTFlash Flood WarningARXAllamakee3 hr
Sep 22, 10:19 AM CDTFlash Flood WarningARXClayton3 hr
Sep 22, 11:20 AM CDTRiver Flood WarningARXAllamakee, Clayton10 days
Sep 22, 11:20 AM CDTRiver Flood WarningARXClayton9 days
Sep 22, 12:58 PM CDTAreal Flood WarningARXAllamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more21 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.