Alert archive / Iowa / Flash Flood Warnings in 2016

Flash Flood Warning 22, NWS La Crosse, WI

August 24, 2016Allamakee County, Winneshiek County, Iowa

NWS La Crosse, WI issued this flash flood warning at Aug 24, 2016, 1:02 AM CDT for Allamakee County, Winneshiek County, Iowa. It was in force for 6 hr. 18 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
Aug 24, 2016, 1:02 AM CDT (06:02 UTC)
Expired
Aug 24, 2016, 7:00 AM CDT
In force
6 hr
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Flood severity
None

Counties Allamakee County, IA, Winneshiek County, IA

The radar

The La Crosse radar (KARX), 61 km from the middle of the area, began a volume at 06:04 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
Aug 24, 2:26 AM CDTFLASH FLOODLansing, IA5.2 INCHES OF RAIN. FLOODING IN LANSING .
Aug 24, 2:45 AM CDTHEAVY RAIN 2.095 Sw Waukon Jct, IAMESONET STATION 4 ENE WATSON /YRII4/.
Aug 24, 2:45 AM CDTHEAVY RAIN 4.231 Ene Bluffton, IAMESONET STATION BLUFFTON /BLFI4/.
Aug 24, 3:00 AM CDTFLASH FLOODWaukon, IASEVERAL REPORTS OF RESCUES UNDERWAY NEAR WAUKON. EXACT NATURE UNKNOWN.
Aug 24, 3:00 AM CDTHEAVY RAIN 5.563 S Dorchester, IAMESONET STATION 3 S DORCHESTER /DCHI4R2/.
Aug 24, 3:07 AM CDTHEAVY RAIN 3.313 Wnw Waukon Jct, IAMESONET STATION 3 SE WATERVILLE /YSPI4/.
Aug 24, 3:11 AM CDTFLASH FLOOD2 N Lansing, IAMUDSLIDE REPORTED NORTH OF TOWN
Aug 24, 3:11 AM CDTFLASH FLOOD2 Nnw Lansing, IAMUDSLIDE REPORTED NORTH OF TOWN.
Aug 24, 3:28 AM CDTFLASH FLOOD1 Ene Protivin, IAWATER UP TO KNEES IN RESIDENCE AND EVACUATING.
Aug 24, 3:28 AM CDTFLASH FLOOD1 E Protivin, IAWATER UP TO KNEES IN RESIDENCE AND EVACUATING
Aug 24, 3:52 AM CDTFLASH FLOOD3 E Protivin, IACOUNTY ROAD B16 IMPASSABLE DUE TO RISING WATER
Aug 24, 3:52 AM CDTFLASH FLOOD3 E Protivin, IACOUNTY ROAD B16 IMPASSABLE DUE TO RISING WATER.
Aug 24, 5:05 AM CDTFLOOD2 E Decorah, IAWIDESPREAD FLOODING REPORTED IN FREEPORT AREA AND NO TRAVEL IS ALLOWED.
Aug 24, 5:12 AM CDTFLASH FLOOD2 E Decorah, IAPERFORMING WATER RESCUES IN FREEPORT AREA EAST OF DECORAH
Aug 24, 5:12 AM CDTFLASH FLOOD2 E Decorah, IAPERFORMING WATER RESCUES IN FREEPORT AREA EAST OF DECORAH.
Aug 24, 5:12 AM CDTFLASH FLOODSpillville, IAABANDONED SAND BAGGING EFFORTS BECAUSE RIVER IS RISING TOO QUICKLY.
Aug 24, 5:18 AM CDTFLASH FLOODCalmar, IAGENTLEMEN STANDING ON TOP OF VEHICLE THAT IS STRANDED NEAR HIGHWAY 52
Aug 24, 5:18 AM CDTFLASH FLOODCalmar, IAGENTLEMEN STANDING ON TOP OF VEHICLE THAT IS STRANDED NEAR HIGHWAY 52.

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, 6.0 hours before the alert went out and 199 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 2016-08-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 83 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 00:00Z on 2016-08-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 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
83 J/kg
Mixed-layer CIN
-226 J/kg
Mixed-layer LCL
974 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

049 
WGUS53 KARX 240602
FFWARX
IAC005-191-241200-
/O.NEW.KARX.FF.W.0022.160824T0602Z-160824T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
102 AM CDT WED AUG 24 2016

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ALLAMAKEE COUNTY IN NORTHEASTERN IOWA...
  WINNESHIEK COUNTY IN NORTHEASTERN IOWA...

* UNTIL 700 AM CDT

* AT 100 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLOODING
  ACROSS THE WARNED AREA. 3 TO 5 INCHES OF RAIN HAVE ALREADY
  FALLEN...WITH AN ADDITIONAL 1 TO 2 INCHES EXPECTED THROUGH SUNRISE.

THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...

VILLAGE CREEK...MINOR CREEK...WILLIAMS CREEK...DRY RUN...DUCK
CREEK...DEER CREEK...KRUMM CREEK...LITTLE TURKEY CREEK...JONES
CREEK...HICKORY CREEK...ELLIOTT CREEK...NORTH CANOE CREEK...ERICKSON
SPRING BRANCH...DU CHARME CREEK...ROBERTS CREEK...WEXFORD
CREEK...FITZGERALD CREEK...TROUT RIVER AND TROUT RUN.

THIS WARNING REPLACES THE PREVIOUS FLASH FLOOD WARNING IN EFFECT FOR
WINNESHIEK COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4308 9208 4350 9208 4350 9122 4345 9123
      4341 9120 4337 9122 4335 9121 4331 9111
      4326 9106 4324 9107 4313 9118 4308 9118

$$

DL
5 follow-up statements
017 
WGUS73 KARX 240708
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
208 AM CDT WED AUG 24 2016

IAC005-191-241200-
/O.CON.KARX.FF.W.0022.000000T0000Z-160824T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ALLAMAKEE IA-WINNESHIEK IA-
208 AM CDT WED AUG 24 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 AM CDT FOR
ALLAMAKEE AND WINNESHIEK COUNTIES...

AT 201 AM CDT...HEAVY RAINFALL CONTINUES ACROSS MUCH OF ALLAMAKEE
AND WINNESHIEK COUNTIES...WITH RAIN AMOUNTS OF 4 TO 6 INCHES
REPORTED SINCE TUESDAY EVENING. FLASH FLOODING IS OCCURRING IN MANY
AREAS AND WILL CONTINUE OVERNIGHT. LOOK FOR RAPID RISES ON AREA
STREAMS AND RIVERS TO CONTINUE AS WELL WITH ADDITIONAL RAINFALL OF 1
TO 2 INCHES EXPECTED.

THOSE NEAR STREAMS AND RIVERS...AS WELL AS THOSE CAMPING...SHOULD
TAKE IMMEDIATE ACTION IF RISING WATERS ARE OBSERVED.

THIS FLASH FLOOD WARNING INCLUDES THE FOLLOWING STREAMS AND
DRAINAGES... TURKEY RIVER...DRY RUN CREEK...UPPER IOWA
RIVER...WILLIAMS CREEK...SILVER CREEK...WONDER CREEK...DEER
CREEK...LITTLE TURKEY CREEK...ROGERS CREEK...DU CHARME
CREEK...ROBERTS CREEK...WEXFORD CREEK...TROUT RIVER...AND TROUT RUN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. THOSE CAMPING SHOULD TAKE IMMEDIATE ACTION TO
MOVE AWAY FROM RISING WATERS. 

&&

LAT...LON 4308 9208 4350 9208 4350 9122 4345 9123
      4341 9120 4337 9122 4335 9121 4331 9111
      4326 9106 4324 9107 4313 9118 4308 9118

$$

LAWRENCE
035 
WGUS73 KARX 240804
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
304 AM CDT WED AUG 24 2016

IAC005-191-241200-
/O.CON.KARX.FF.W.0022.000000T0000Z-160824T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ALLAMAKEE IA-WINNESHIEK IA-
304 AM CDT WED AUG 24 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 AM CDT FOR
ALLAMAKEE AND WINNESHIEK COUNTIES...

AT 259 AM CDT...WIDESPREAD FLASH FLOODING CONTINUES ACROSS MUCH OF
ALLAMAKEE AND WINNESHIEK COUNTIES. RAINFALL OF 3 TO 5 INCHES HAS
ALREADY OCCURRED...WITH AN ADDITIONAL 1 TO 2 INCHES EXPECTED THROUGH
4 AM.

EXCESSIVE RAINFALL OVER THE WARNED AREA WILL CAUSE FLASH FLOODING
AND MUD SLIDES NEAR STEEP TERRAIN. THE MUD SLIDE CAN CONSIST OF
ROCK...MUD...VEGETATION AND OTHER LOOSE MATERIALS.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
DECORAH...WAUKON...LANSING...POSTVILLE...CALMAR...OSSIAN...
NEW ALBIN...SPILLVILLE...FORT ATKINSON...HARPERS FERRY...RIDGEWAY...
HARDIN...CASTALIA...WATERVILLE...JACKSON JUNCTION...BLUFFTON...
VILLAGE CREEK...BURR OAK...
STATE ROAD 9 AND COUNTY X 20 AND HARVEST FARM CAMPGROUND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLOODING IS OCCURRING!. IT IS IMPORTANT TO KNOW WHERE YOU ARE
RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME KILLERS IN
HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR CREEKS.

BE VERY CAUTIOUS AT NIGHT...WHEN IT IS IMPOSSIBLE TO RECOGNIZE HOW
DEEP WATERS MAY BE. NEVER DRIVE THROUGH FLOOD WATERS.

&&

LAT...LON 4308 9208 4350 9208 4350 9122 4345 9123
      4341 9120 4337 9122 4335 9121 4331 9111
      4326 9106 4324 9107 4313 9118 4308 9118

$$

LAWRENCE
305 
WGUS73 KARX 240905
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
405 AM CDT WED AUG 24 2016

IAC005-191-241200-
/O.CON.KARX.FF.W.0022.000000T0000Z-160824T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ALLAMAKEE IA-WINNESHIEK IA-
405 AM CDT WED AUG 24 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 AM CDT FOR
ALLAMAKEE AND WINNESHIEK COUNTIES...

AT 402 AM CDT...LOCAL LAW ENFORCEMENT REPORTED FLASH FLOODING ACROSS
MUCH OF WINNESHIEK COUNTY. SOME ROADS HAVE BEEN WASHED OUT. 

EXCESSIVE RAINFALL OVER THE WARNED AREA WILL CAUSE MUD SLIDES NEAR
STEEP TERRAIN. THE MUD SLIDE CAN CONSIST OF ROCK...MUD...VEGETATION
AND OTHER LOOSE MATERIALS.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
DECORAH...WAUKON...LANSING...POSTVILLE...CALMAR...OSSIAN...
NEW ALBIN...SPILLVILLE...FORT ATKINSON...HARPERS FERRY...RIDGEWAY...
HARDIN...CASTALIA...WATERVILLE...JACKSON JUNCTION...BLUFFTON...
VILLAGE CREEK...BURR OAK...
STATE ROAD 9 AND COUNTY X 20 AND HARVEST FARM CAMPGROUND.

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. WASHED OUT ROADS CAN BE EXTREMELY DIFFICULT TO
SEE WHILE DRIVING. 

&&

LAT...LON 4308 9208 4350 9208 4350 9122 4345 9123
      4341 9120 4337 9122 4335 9121 4331 9111
      4326 9106 4324 9107 4313 9118 4308 9118

$$

WETENKAMP
512 
WGUS73 KARX 240928
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
428 AM CDT WED AUG 24 2016

IAC005-191-241200-
/O.CON.KARX.FF.W.0022.000000T0000Z-160824T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ALLAMAKEE IA-WINNESHIEK IA-
428 AM CDT WED AUG 24 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 AM CDT FOR
ALLAMAKEE AND WINNESHIEK COUNTIES...

AT 427 AM CDT...LOCAL LAW ENFORCEMENT REPORTED FLASH FLOODING IS
OCCURRING ACROSS PORTIONS OF WINNESHIEK AND ALLAMAKEE COUNTIES. SOME
ROADS HAVE BEEN WASHED OUT.  

EXCESSIVE RAINFALL OVER THE WARNED AREA WILL CAUSE MUD SLIDES NEAR
STEEP TERRAIN. THE MUD SLIDE CAN CONSIST OF ROCK...MUD...VEGETATION
AND OTHER LOOSE MATERIALS.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
DECORAH...WAUKON...LANSING...POSTVILLE...CALMAR...OSSIAN...
NEW ALBIN...SPILLVILLE...FORT ATKINSON...HARPERS FERRY...RIDGEWAY...
HARDIN...CASTALIA...WATERVILLE...JACKSON JUNCTION...BLUFFTON...
VILLAGE CREEK...BURR OAK...
STATE ROAD 9 AND COUNTY X 20 AND HARVEST FARM CAMPGROUND.

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 4308 9208 4350 9208 4350 9122 4345 9123
      4341 9120 4337 9122 4335 9121 4331 9111
      4326 9106 4324 9107 4313 9118 4308 9118

$$

WETENKAMP
912 
WGUS73 KARX 241015
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
515 AM CDT WED AUG 24 2016

IAC005-191-241200-
/O.CON.KARX.FF.W.0022.000000T0000Z-160824T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ALLAMAKEE IA-WINNESHIEK IA-
515 AM CDT WED AUG 24 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 AM CDT FOR
ALLAMAKEE AND WINNESHIEK COUNTIES...

AT 508 AM CDT...LOCAL LAW ENFORCEMENT REPORTED FLOODING ACROSS
ALLAMAKEE AND WINNESHIEK COUNTIES. SERIOUS FLOODING IS OCCURRING
ACROSS PARTS OF THE COUNTY. THIS INCLUDES SPILLVILLE AND BETWEEN
DECORAH AND WAUKON. SOME HOMES HAVE BEEN FLOODED WITH WATER RESCUES
ONGOING. 

IN ADDITION...MUD SLIDES ARE OCCURRING IN STEEP TERRAIN AREAS. THE
MUD SLIDE CAN CONSIST OF ROCK...MUD...VEGETATION AND OTHER LOOSE
MATERIALS.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
DECORAH...WAUKON...LANSING...POSTVILLE...CALMAR...OSSIAN...
NEW ALBIN...SPILLVILLE...FORT ATKINSON...HARPERS FERRY...RIDGEWAY...
HARDIN...CASTALIA...WATERVILLE...JACKSON JUNCTION...BLUFFTON...
VILLAGE CREEK...BURR OAK...
STATE ROAD 9 AND COUNTY X 20 AND HARVEST FARM CAMPGROUND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

AVOID THESE AREAS IF POSSIBLE. BE ALERT FOR WASHED OUT ROADS WHICH
ARE ESPECIALLY DIFFICULT TO SPOT WHILE DRIVING. 
&&

LAT...LON 4308 9208 4350 9208 4350 9122 4345 9123
      4341 9120 4337 9122 4335 9121 4331 9111
      4326 9106 4324 9107 4313 9118 4308 9118

$$

WETENKAMP

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 23, 8:30 PM CDTSpecial Weather StatementARXChickasaw, Winneshiek60 min
Aug 23, 9:10 PM CDTAreal Flood AdvisoryARXAllamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more3 hr
Aug 23, 9:57 PM CDTAreal Flood WarningARXChickasaw, Floyd, Howard9 hr
Aug 23, 10:11 PM CDTFlash Flood WarningARXWinneshiek4 hr
Aug 24, 12:21 AM CDTFlash Flood WarningARXHoward, Mitchell4 hr
Aug 24, 2:05 AM CDTRiver Flood WarningARXWinneshiek25 hr
Aug 24, 2:05 AM CDTRiver Flood WarningARXAllamakee3 days
Aug 24, 3:36 AM CDTAreal Flood WarningARXFayette32 hr
Aug 24, 3:48 AM CDTFlash Flood WarningARXChickasaw, Howard3 hr
Aug 24, 4:11 AM CDTRiver Flood WarningARXWinneshiek17 hr
Aug 24, 4:17 AM CDTAreal Flood WarningARXHoward, Mitchell3 hr
Aug 24, 6:46 AM CDTFlash Flood Warning EmergencyARXAllamakee, Chickasaw, Howard, Winneshiek6 hr
Aug 24, 8:00 AM CDTRiver Flood WarningARXFloyd48 hr
Aug 24, 8:59 AM CDTRiver Flood WarningARXClayton4 days
Aug 24, 8:59 AM CDTRiver Flood WarningARXClayton3 days
Aug 24, 10:38 AM CDTSpecial Weather StatementARXChickasaw, Winneshiek82 min
Aug 24, 11:03 AM CDTAreal Flood WarningARXAllamakee, Chickasaw, Howard, Winneshiek24 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.