Alert archive / Wisconsin / Flash Flood Warnings in 2011

Flash Flood Warning 12, NWS La Crosse, WI

July 19, 2011Clark County, Taylor County, Wisconsin

NWS La Crosse, WI issued this flash flood warning at Jul 19, 2011, 8:37 PM CDT for Clark County, Taylor County, Wisconsin. It was in force for 4 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: Jul 19, 2011, 8:37 PM CDT (01:37 UTC)
Expired: Jul 20, 2011, 12:30 AM CDT
In force: 4 hr
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Flood severity: None

Counties Clark County, WI, Taylor County, WI

The radar

The La Crosse radar (KARX), 161 km from the middle of the area, began a volume at 01:40 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

Time	Report	Where	Remark
Jul 19, 9:03 PM CDT	HEAVY RAIN 3.5	Abbotsford, WI
Jul 19, 9:15 PM CDT	HEAVY RAIN 2.91	2 N Owen, WI	HOUR AND A HALF RAINFALL TOTAL.
Jul 19, 10:15 PM CDT	HEAVY RAIN 4.56	2 Ne Lublin, WI	DIAMOND LAKE RAWS SITE. REPORTED 3.32 INCHES IN ONE HOUR BETWEEN 714 PM AND 814 PM. 4.56 IS THE TOTAL RAINFALL.
Jul 19, 10:20 PM CDT	FLASH FLOOD	Unity, WI	RISING WATER THREATENING A HOME.
Jul 19, 11:00 PM CDT	HEAVY RAIN 4	7 Nne Gilman, WI	RAINFALL TOTAL

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

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.6 hours before the alert went out and 190 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1847 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1140 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 114 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

634 
WGUS53 KARX 200137
FFWARX
WIC019-119-200530-
/O.NEW.KARX.FF.W.0012.110720T0137Z-110720T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
837 PM CDT TUE JUL 19 2011

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN CLARK COUNTY IN CENTRAL WISCONSIN...
  TAYLOR COUNTY IN NORTH CENTRAL WISCONSIN...

* UNTIL 1230 AM CDT

* AT 834 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MEDFORD...ABBOTSFORD...CHELSEA...DORCHESTER...JUMP                 
  RIVER...OWEN...  RIB LAKE...THORP AND WESTBORO. SOME RIVERS AND    
  CREEKS THAT MAY EXPERIENCE FLOODING INCLUDE THE FISHER             
  RIVER...PINE CREEK...ELDER CREEK...AND HAY CREEK.

THERE HAVE BEEN REPORTS OF WATER OVER THE ROAD NEAR GILMAN WITH THIS 
RAINFALL.  ADDITIONAL THUNDERSTORMS ACROSS WESTERN WISCONSIN WILL 
LIKELY ADD TO THE 2 TO 3 INCHES OF RAIN THAT HAS ALREADY FALLEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 4538 9004 4512 9004 4512 9018 4504 9019
      4503 9031 4479 9031 4493 9093 4539 9092

$$

HALBACH

3 follow-up statements

760 
WGUS73 KARX 200212
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
912 PM CDT TUE JUL 19 2011

WIC019-119-200530-
/O.CON.KARX.FF.W.0012.000000T0000Z-110720T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK WI-TAYLOR WI-
912 PM CDT TUE JUL 19 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR TAYLOR AND NORTHERN
CLARK COUNTIES UNTIL 1230 AM CDT...

AT 910 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT WATER 
WAS COVERING SOME ROADS IN THE CITY OF GILMAN. VERY HEAVY RAINFALL 
CONTINUES OVER THE WARNED AREA...WITH RAINFALL RATES OF UP TO 2 
INCHES PER HOUR. THIS WILL CAUSE FLASH FLOODING ACROSS NORTHERN 
CLARK AND ALL OF TAYLOR COUNTIES.  

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...MEDFORD...
ABBOTSFORD...CHELSEA...DORCHESTER...JUMP RIVER...OWEN...RIB LAKE...
THORP AND WESTBORO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 4538 9004 4512 9004 4512 9018 4504 9019
      4503 9031 4479 9031 4493 9093 4539 9092

$$

RABERDING

803 
WGUS73 KARX 200254
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
954 PM CDT TUE JUL 19 2011

WIC019-119-200530-
/O.CON.KARX.FF.W.0012.000000T0000Z-110720T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK WI-TAYLOR WI-
954 PM CDT TUE JUL 19 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR TAYLOR AND NORTHERN
CLARK COUNTIES UNTIL 1230 AM CDT...

AT 952 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY 
RAINFALL NOW OVER CENTRAL AND SOUTHERN CLARK COUNTIES. THE RAIN HAS 
DIMINISHED IN INTENSITY ACROSS TAYLOR COUNTY. RADAR ESTIMATES AND 
SPOTTER REPORTS INDICATE 2 TO 4 INCHES OF RAIN HAS FALLEN ACROSS THE 
AREA SINCE 8 PM THIS EVENING.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MEDFORD...ABBOTSFORD...CHELSEA...DORCHESTER...JUMP RIVER...OWEN...RIB
LAKE...THORP AND WESTBORO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 4538 9004 4512 9004 4512 9018 4504 9019
      4503 9031 4479 9031 4493 9093 4539 9092

$$

RABERDING

086 
WGUS73 KARX 200355
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1055 PM CDT TUE JUL 19 2011

WIC019-119-200530-
/O.CON.KARX.FF.W.0012.000000T0000Z-110720T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLARK WI-TAYLOR WI-
1055 PM CDT TUE JUL 19 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR TAYLOR AND NORTHERN
CLARK COUNTIES UNTIL 1230 AM CDT...

AT 1052 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS CONFINED TO THE EASTERN AREAS OF TAYLOR COUNTY AND HAD 
ENDED ACROSS NORTHERN CLARK COUNTY. RADAR AND SPOTTER REPORTS 
INDICATE 2 TO 4 INCHES OF RAIN HAS FALLEN ACROSS THE AREA EARLIER 
THIS EVENING. BUT WITH THE RAIN ENDING...THE WATER WILL BEGIN TO 
RECEDE. 

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MEDFORD...ABBOTSFORD...CHELSEA...DORCHESTER...JUMP RIVER...OWEN...RIB
LAKE...THORP AND WESTBORO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 4538 9004 4512 9004 4512 9018 4504 9019
      4503 9031 4479 9031 4493 9093 4539 9092

$$

RABERDING

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 7:19 PM CDT	Tornado Warning	ARX	Clark, Taylor	26 min
Jul 19, 7:43 PM CDT	Tornado Warning	ARX	Clark, Taylor	32 min
Jul 19, 7:45 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Taylor	60 min
Jul 19, 8:45 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Taylor	60 min
Jul 19, 9:41 PM CDT	Flash Flood Warning	ARX	Clark	3 hr
Jul 19, 9:45 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Jackson, Trempealeau	60 min
Jul 19, 10:27 PM CDT	Severe Thunderstorm Warning	ARX	Adams, Juneau	63 min
Jul 20, 12:25 AM CDT	Areal Flood Warning	ARX	Clark, Taylor	9 hr

Nearby

Flash Flood Warnings in Wisconsin, 2011 Every flash flood warning in 2011

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.