Alert archive / Iowa / Flash Flood Warnings in 2016

Flash Flood Warning 33, NWS La Crosse, WI

September 9, 20165 counties in Iowa

NWS La Crosse, WI issued this flash flood warning at Sep 9, 2016, 3:16 PM CDT for 5 counties in Iowa. It was in force for 3 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
Sep 9, 2016, 3:16 PM CDT (20:16 UTC)
Expired
Sep 9, 2016, 6:15 PM CDT
In force
3 hr
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Flood severity
None

Counties Chickasaw County, IA, Fayette County, IA, Floyd County, IA, Howard County, IA, Winneshiek County, IA

The radar

The La Crosse radar (KARX), 119 km from the middle of the area, began a volume at 20:17 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 9, 4:18 PM CDTHEAVY RAIN 3.851 Ne Floyd, IASTORM TOTAL. REPORT RELAYED BY MEDIA.
Sep 9, 4:20 PM CDTHEAVY RAIN 3.46 E Elma, IA
Sep 9, 4:35 PM CDTHEAVY RAIN 2.95 Nnw Decorah, IASTORM TOTAL SO FAR.

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

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 8.3 hours before the alert went out and 215 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, Minneapolis, MN at 12:00Z on 2016-09-09Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2016-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 82 square meters per square second.1939587897Sfc1 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
1205 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
82 m²/s²
0-3 km storm-relative helicity
222 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

810 
WGUS53 KARX 092016
FFWARX
IAC037-065-067-089-191-092315-
/O.NEW.KARX.FF.W.0033.160909T2016Z-160909T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
316 PM CDT FRI SEP 9 2016

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN FAYETTE COUNTY IN NORTHEASTERN IOWA...
  CHICKASAW COUNTY IN NORTHEASTERN IOWA...
  SOUTHERN HOWARD COUNTY IN NORTHEASTERN IOWA...
  WINNESHIEK COUNTY IN NORTHEASTERN IOWA...
  FLOYD COUNTY IN NORTH CENTRAL IOWA...

* UNTIL 615 PM CDT

* THIS IS A CONTINUATION OF THE FLASH FLOOD WARNING. 

* AT 310 PM  CDT...LAW ENFORCEMENT OFFICIALS CONTINUED TO REPORT
  WATER WAS RISING ON CREEKS AND STREAMS...AND OVER ROADS. EXTREME
  CAUTION SHOULD BE TAKEN IF TRAVELING THIS AFTERNOON IN NORTHEAST
  IOWA.

* RIVER GAGES IN THE AREA ALSO CONFIRM MANY RIVERS OR CREEKS ARE
  MODERATELY FLOODING AND STILL RISING.  

* CREEKS AND STREAMS WILL CONTINUE TO RISE INTO THE EVENING. THOSE
  TRAVELING SHOULD BE AWARE THAT ROADS MAY BE CLOSED.

THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES OF THE:

TURKEY RIVER... CEDAR RIVER... LITTLE WAPSIPINICON RIVER...
AND WAPSIPINICON RIVER. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4321 9261 4321 9256 4324 9255 4346 9201
      4339 9171 4306 9173 4288 9208 4291 9208
      4291 9280 4307 9295

$$

BAUMGARDT
1 follow-up statement
797 
WGUS73 KARX 092312
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
612 PM CDT FRI SEP 9 2016

IAC037-065-067-089-191-092317-
/O.EXP.KARX.FF.W.0033.000000T0000Z-160909T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FAYETTE IA-CHICKASAW IA-HOWARD IA-WINNESHIEK IA-FLOYD IA-
612 PM CDT FRI SEP 9 2016

...THE FLASH FLOOD WARNING FOR NORTHWESTERN FAYETTE...CHICKASAW...
SOUTHERN HOWARD...WINNESHIEK AND FLOYD COUNTIES WILL EXPIRE AT 615 PM
CDT...

THE HEAVY RAIN HAS ENDED, ALLOWING THE FLASH FLOOD WARNING TO EXPIRE
AT 615 PM. HOWEVER, WATER WILL CONTINUE TO MOVE INTO THE LOCAL RIVER
SYSTEM THIS EVENING AND OVERNIGHT, RESULTING IN ELEVATED WATER
LEVELS AND POSSIBLE ROAD CLOSURES. THE FLASH FLOOD WARNING WILL BE
REPLACED WITH AN AREAL FLOOD WARNING. REMAIN ALERT FOR HIGH CREEKS
AND STREAMS ACROSS THE AREA IF TRAVELING TONIGHT. 

LAT...LON 4321 9261 4321 9256 4324 9255 4346 9201
      4339 9171 4306 9173 4288 9208 4291 9208
      4291 9280 4307 9295

$$

ROGERS

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 9, 11:08 AM CDTAreal Flood AdvisoryARXAllamakee, Chickasaw, Fayette, Floyd, Howard, Mitchell and 1 more3 hr
Sep 9, 11:41 AM CDTFlash Flood WatchARXAllamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more7 hr
Sep 9, 12:28 PM CDTFlash Flood WarningARXChickasaw, Fayette, Floyd, Howard, Winneshiek3 hr
Sep 9, 1:02 PM CDTFlash Flood WarningARXAllamakee, Winneshiek3 hr
Sep 9, 2:35 PM CDTRiver Flood WarningARXAllamakee67 hr
Sep 9, 2:39 PM CDTRiver Flood WarningARXClayton4 days
Sep 9, 2:39 PM CDTRiver Flood WarningARXClayton64 hr
Sep 9, 6:17 PM CDTAreal Flood WarningARXChickasaw, Fayette, Howard, Winneshiek50 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.