Alert archive / Wisconsin / Flash Flood Warnings in 2014

Flash Flood Warning 19, NWS La Crosse, WI

August 4, 2014La Crosse County, Wisconsin

NWS La Crosse, WI issued this flash flood warning at Aug 4, 2014, 1:51 PM CDT for La Crosse County, Wisconsin. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 4, 2014, 1:51 PM CDT (18:51 UTC)
Expired
Aug 4, 2014, 4:45 PM CDT
In force
3 hr
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Flood severity
None

County La Crosse County, WI

The radar

The La Crosse radar (KARX), 3 km from the middle of the area, began a volume at 18:54 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 6.9 hours before the alert went out and 222 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 2014-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 767 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, Minneapolis, MN at 12:00Z on 2014-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 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
767 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
1046 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
46 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.

127 
WGUS53 KARX 041851
FFWARX
WIC063-042145-
/O.NEW.KARX.FF.W.0019.140804T1851Z-140804T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
151 PM CDT MON AUG 4 2014

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN LA CROSSE COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 445 PM CDT
    
* AT 148 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
  HEAVY RAIN IN LA CROSSE AND ONALASKA. UP TO ONE INCH OF RAIN HAS 
  ALREADY FALLEN. FLASH FLOODING WILL BE OCCURRING IN FLOOD PRONE 
  AREAS OF THESE CITIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE IN AREAS WHERE WATER COVER THE ROAD.

&&

LAT...LON 4372 9109 4372 9126 4378 9125 4380 9127
      4385 9129 4387 9131 4390 9132 4394 9108

$$

BOYNE
1 follow-up statement
225 
WGUS73 KARX 042001
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
301 PM CDT MON AUG 4 2014

WIC063-042010-
/O.CAN.KARX.FF.W.0019.000000T0000Z-140804T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LA CROSSE WI-
301 PM CDT MON AUG 4 2014

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN LA CROSSE COUNTY IS
CANCELLED...

THE HEAVY RAINS HAVE ENDED...AND ARE NO LONGER EXPECTED TO POSE A
THREAT TO LIFE OR PROPERTY. PLEASE CONTINUE TO HEED ANY ROAD
CLOSURES.

LAT...LON 4372 9109 4372 9126 4378 9125 4380 9127
      4385 9129 4387 9131 4390 9132 4394 9108

$$

BOYNE

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 7:26 PM CDTSpecial Weather StatementARXClark34 min
Aug 4, 3:40 AM CDTSpecial Weather StatementARXJackson35 min
Aug 4, 4:05 AM CDTSpecial Weather StatementARXJackson25 min
Aug 4, 9:03 AM CDTSpecial Weather StatementARXJackson27 min
Aug 4, 6:37 PM CDTSpecial Weather StatementARXTaylor53 min

Nearby

Flash Flood Warnings in Wisconsin, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.