Alert archive / Wisconsin / Flash Flood Warnings in 2011
Flash Flood Warning 11, NWS La Crosse, WI
NWS La Crosse, WI issued this flash flood warning at Jul 18, 2011, 9:32 AM CDT for Jackson County, Monroe 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
- Jul 18, 2011, 9:32 AM CDT (14:32 UTC)
- Expired
- Jul 18, 2011, 12:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Flood severity
- None
Counties Jackson County, WI, Monroe County, WI
The radar
The La Crosse radar (KARX), 43 km from the middle of the area, began a volume at 14:33 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
Green Bay/Straub, WI (KGRB), launched 12:00Z, 2.5 hours before the alert went out and 223 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.
- Mixed-layer CAPE
- 3928 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 613 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 111 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 9.7
The text
As transmitted, in the capitals the NWS used until 2016.
891
WGUS53 KARX 181432
FFWARX
WIC053-081-181730-
/O.NEW.KARX.FF.W.0011.110718T1432Z-110718T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
932 AM CDT MON JUL 18 2011
THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHWESTERN MONROE COUNTY IN WEST CENTRAL WISCONSIN...
SOUTH CENTRAL JACKSON COUNTY IN WEST CENTRAL WISCONSIN...
* UNTIL 1230 PM CDT
* AT 929 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. RAINFALL RATES OF UP TO 3 INCHES PER HOUR WILL BE
POSSIBLE WITH THESE STORMS.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
CATARACT. SOME RIVERS AND STREAMS IN THE LOCATION OF THIS FLOODING
INCLUDE THE BLACK RIVER...SHAMROCK CREEK...SPENCER CREEK AND
ROBINSON CREEK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN VEHICLES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...DIPS...
OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM... EVEN A
SMALL ONE...ON FOOT OR IN A VEHICLE.
&&
LAT...LON 4407 9073 4407 9091 4407 9099 4414 9098
4416 9090 4426 9089 4416 9070
$$
HALBACH2 follow-up statements
378
WGUS73 KARX 181543
FFSARX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1043 AM CDT MON JUL 18 2011
WIC053-081-181730-
/O.CON.KARX.FF.W.0011.000000T0000Z-110718T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JACKSON WI-MONROE WI-
1043 AM CDT MON JUL 18 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHWESTERN MONROE AND
SOUTH CENTRAL JACKSON COUNTIES UNTIL 1230 PM CDT...
AT 1040 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT FLASH FLOODING WAS OCCURRING ACROSS THE WARNED AREA. RADAR
ESTIMATES THAT 3 TO 4 INCHES OF RAIN FELL ACROSS THE AREA EARLIER
THIS MORNING. TRAINED WEATHER OBSERVERS HAVE REPORTED THAT OVER 4
INCHES OF RAIN HAS FALLEN WITH THESE EARLIER STORMS WHICH HAVE
CAUSED SOME ROADS TO BE WASHED OUT.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING
INCLUDE...IRVING...CATARACT AND SHAMROCK. SOME RIVERS THAT MAY
EXPERIENCE SOME FLOODING INCLUDE...THE BLACK RIVER...SHAMROCK
CREEK...PRINTZ CREEK...AND DOUGLAS CREEK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN HILLY TERRAIN...THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH
ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL
ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW
INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.
&&
LAT...LON 4407 9073 4407 9091 4407 9099 4414 9098
4416 9090 4426 9089 4416 9070
$$
HALBACH998
WGUS73 KARX 181723
FFSARX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1223 PM CDT MON JUL 18 2011
WIC053-081-181738-
/O.EXP.KARX.FF.W.0011.000000T0000Z-110718T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JACKSON WI-MONROE WI-
1223 PM CDT MON JUL 18 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHWESTERN MONROE
AND SOUTH CENTRAL JACKSON COUNTIES WILL BE ALLOWED TO EXPIRE AT 1230
PM CDT...
EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.
LAT...LON 4407 9073 4407 9091 4407 9099 4414 9098
4416 9090 4426 9089 4416 9070
$$
HALBACHThe office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 8:29 PM CDT | Severe Thunderstorm Warning | ARX | Taylor | 25 min |
| Jul 18, 8:46 AM CDT | Flash Flood Warning | ARX | Jackson, Trempealeau | 4 hr |
| Jul 18, 9:01 AM CDT | Severe Thunderstorm Warning | ARX | Jackson, Trempealeau | 44 min |
| Jul 18, 9:38 AM CDT | Severe Thunderstorm Warning | ARX | Jackson, La Crosse, Monroe, Trempealeau | 37 min |
Nearby
Flash Flood Warnings in Wisconsin, 2011Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.