Alert archive / Iowa / Flash Flood Warnings in 2014

Flash Flood Warning 13, NWS La Crosse, WI

June 19, 20144 counties in Iowa

NWS La Crosse, WI issued this flash flood warning at Jun 19, 2014, 1:26 PM CDT for 4 counties in Iowa. It was in force for 3 hr. 2 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
Jun 19, 2014, 1:26 PM CDT (18:26 UTC)
Expired
Jun 19, 2014, 4:30 PM CDT
In force
3 hr
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Flood severity
None

Counties Allamakee County, IA, Clayton County, IA, Fayette County, IA, Winneshiek County, IA

The radar

The La Crosse radar (KARX), 99 km from the middle of the area, began a volume at 18:27 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
Jun 19, 3:36 PM CDTFLASH FLOOD5 Se Waukon, IA13 ROADS CLOSED OR HAVE WATER OVER THEM AFTER WATER HAD RECEDED EARLIER. STREET FLOODING IN WAUKON AS WELL.
Jun 19, 4:05 PM CDTFLASH FLOODElkader, IAWATER OVER ROADS IN VARIOUS SECTIONS OF THE COUNTY. EARLIER LEVELS THAT HAD RECEDED WERE ALL BACK UP.

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, 6.4 hours before the alert went out and 161 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 2014-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 137 joules per kilogram.LCLLFCEL10008507005003002001001 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, Davenport, at 12:00Z on 2014-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 138 square meters per square second.1939Sfc1 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
137 J/kg
Mixed-layer CIN
-248 J/kg
Mixed-layer LCL
695 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
138 m²/s²
0-3 km storm-relative helicity
194 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.7

Open this sounding in Storm Lab

The text

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

523 
WGUS53 KARX 191826
FFWARX
IAC005-043-065-191-192130-
/O.NEW.KARX.FF.W.0013.140619T1826Z-140619T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
126 PM CDT THU JUN 19 2014

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN FAYETTE COUNTY IN NORTHEAST IOWA...
  CLAYTON COUNTY IN NORTHEAST IOWA...
  SOUTHERN ALLAMAKEE COUNTY IN NORTHEAST IOWA...
  SOUTHERN WINNESHIEK COUNTY IN NORTHEAST IOWA...

* UNTIL 430 PM CDT

* AT 123 PM CDT...LOCAL LAW ENFORCEMENT REPORTED FLASH FLOODING 
  ACROSS FAR NORTHEAST IOWA. 3 TO 5 INCHES OF RAIN HAVE FALLEN WITH 
  SOME STORM TOTALS OF UP TO 7 INCHES POSSIBLE. FLASH FLOODING IS 
  ALREADY OCCURRING. EXCESSIVE RAINFALL OVER THE WARNING AREA WILL 
  CAUSE MUD SLIDES NEAR STEEP TERRAIN. THE MUD SLIDE CAN CONSIST OF 
  ROCK...MUD...VEGETATION AND OTHER LOOSE MATERIALS.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES PER HOUR ARE POSSIBLE 
IN THE WARNED AREA.

FLOOD WATERS ARE MOVING DOWN THE YELLOW RIVER FROM OSIAN IOWA DOWN 
THROUGH VOLNEY IOWA AND THE TURKEY RIVER FROM SPILLVILLE IOWA TO 
ELKADER IOWA. TRIBUTARY RIVERS AND CREEKS WILL CREST THIS AFTERNOON 
BUT THE MAIN STEM RIVERS MAY NOT CREST UNTIL TONIGHT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4278 9144 4287 9162 4289 9208 4332 9206
      4329 9108 4325 9106 4312 9118 4291 9115
      4288 9110 4274 9106 4268 9091 4268 9100

$$

HALBACH
1 follow-up statement
925 
WGUS73 KARX 192017
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
317 PM CDT THU JUN 19 2014

IAC005-043-065-191-192130-
/O.CON.KARX.FF.W.0013.000000T0000Z-140619T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FAYETTE IA-CLAYTON IA-ALLAMAKEE IA-WINNESHIEK IA-
317 PM CDT THU JUN 19 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM CDT FOR
FAYETTE...CLAYTON...ALLAMAKEE AND WINNESHIEK COUNTIES...

A LINE OF STORMS HAS DROPPED 1 TO 3 INCHES OF ADDITIONAL RAIN ACROSS 
PARTS OF NORTHEAST IOWA THIS AFTERNOON LEADING TO MORE FLOODING 
PROBLEMS...INCLUDING STREET FLOODING IN OELWEIN. THESE STORMS AND 
ASSOCIATED HEAVY RAIN THREAT WILL CONTINUE TO SHIFT INTO FAR 
SOUTHWEST WISCONSIN THROUGH 5PM.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4278 9144 4287 9162 4289 9208 4332 9206
      4329 9108 4325 9106 4312 9118 4291 9115
      4288 9110 4274 9106 4268 9091 4268 9100

$$

SHEA

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 8:14 PM CDTRiver Flood WarningARXAllamakee, Clayton22 days
Jun 18, 11:41 PM CDTFlash Flood WarningARXAllamakee, Clayton, Fayette, Howard, Winneshiek2 hr
Jun 19, 2:02 AM CDTFlash Flood WarningARXAllamakee, Chickasaw, Clayton, Fayette, Howard, Winneshiek6 hr
Jun 19, 5:26 AM CDTSevere Thunderstorm WarningARXMitchell64 min
Jun 19, 5:27 AM CDTRiver Flood WarningARXClayton4 days
Jun 19, 5:27 AM CDTRiver Flood WarningARXClayton3 days
Jun 19, 5:40 AM CDTSevere Thunderstorm WarningARXMitchell65 min
Jun 19, 7:40 AM CDTFlash Flood WarningARXAllamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more6 hr
Jun 19, 9:24 AM CDTRiver Flood WarningARXAllamakee3 days
Jun 19, 10:20 AM CDTSpecial Weather StatementARXChickasaw, Fayette, Floyd, Howard, Mitchell, Winneshiek55 min
Jun 19, 12:10 PM CDTSpecial Weather StatementARXHoward, Winneshiek65 min
Jun 19, 1:47 PM CDTSpecial Weather StatementARXAllamakee, Clayton, Fayette88 min
Jun 19, 2:42 PM CDTSpecial Weather StatementARXAllamakee, Clayton, Fayette2 hr
Jun 19, 3:41 PM CDTRiver Flood WarningARXClayton6 days
Jun 19, 4:44 PM CDTFlash Flood WarningARXAllamakee, Clayton, Fayette, Winneshiek3 hr
Jun 19, 5:04 PM CDTSpecial Weather StatementARXFloyd, Mitchell26 min

Nearby

Flash Flood Warnings in Iowa, 2014Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.