Alert archive / Wisconsin / Flash Flood Warnings in 2011
Flash Flood Warning 10, NWS La Crosse, WI
NWS La Crosse, WI issued this flash flood warning at Jul 18, 2011, 8:46 AM CDT for Jackson County, Trempealeau County, Wisconsin. It was in force for 4 hr. 3 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 18, 2011, 8:46 AM CDT (13:46 UTC)
- Expired
- Jul 18, 2011, 12:30 PM CDT
- In force
- 4 hr
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Flood severity
- None
Counties Jackson County, WI, Trempealeau County, WI
The radar
The La Crosse radar (KARX), 43 km from the middle of the area, began a volume at 13:47 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 18, 9:15 AM CDT | FLASH FLOOD | Blair, WI | PUBLIC REPORT OF WATER OVER HIGHWAY 95 AT COUNTY S. BY TIME DEPUTY ARRIVED WATER HAD RECEDED. |
| Jul 18, 10:30 AM CDT | FLASH FLOOD | 1 E Taylor, WI | SPOTTER MEASURED 2.5 INCHES IN TAYLOR...BUT HAD OVER 4 INCHES SOUTH OF TOWN IN JUST A FEW HOURS. ROADS WASHED OUT SOUTH OF TAYLOR INCLUDING COMPANY ROAD. A NUMBER OF ROADS STILL HAVE WATER OVER THEM INCLUDING FRENCH CREEK ROAD. |
| Jul 18, 10:55 AM CDT | FLASH FLOOD | 4 S Disco, WI | ROAD WASHOUT AND POSSIBLE CULVERT FAILURE ON LIEN RD AT COUNTY ROAD C IN FRANKLIN TOWNSHIP. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 1.8 hours before the alert went out and 208 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
- 3081 J/kg
- Mixed-layer CIN
- -196 J/kg
- Mixed-layer LCL
- 1082 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 155 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.6
The text
As transmitted, in the capitals the NWS used until 2016.
521
WGUS53 KARX 181346
FFWARX
WIC053-121-181730-
/O.NEW.KARX.FF.W.0010.110718T1346Z-110718T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
846 AM CDT MON JUL 18 2011
THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL TREMPEALEAU COUNTY IN WEST CENTRAL WISCONSIN...
SOUTHWESTERN JACKSON COUNTY IN WEST CENTRAL WISCONSIN...
* UNTIL 1230 PM CDT
* AT 844 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 ARE
POSSIBLE WITH THESE STORMS.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
WHITEHALL...BLAIR...FRANKLIN...INDEPENDENCE AND NORTH BEND. SOME
STREAMS THAT MAY EXPERIENCE FLOODING INCLUDE...TROUT RUN...ROARING
CREEK...FRENCH CREEK...AND THE TREMPEALEAU RIVER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.
&&
LAT...LON 4444 9115 4429 9089 4416 9090 4414 9097
4407 9098 4407 9115 4409 9117 4409 9120
4407 9121 4414 9149 4447 9144
$$
HALBACH3 follow-up statements
212
WGUS73 KARX 181453
FFSARX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
953 AM CDT MON JUL 18 2011
WIC053-121-181730-
/O.CON.KARX.FF.W.0010.000000T0000Z-110718T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JACKSON WI-TREMPEALEAU WI-
953 AM CDT MON JUL 18 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR CENTRAL TREMPEALEAU AND
SOUTHWESTERN JACKSON COUNTIES UNTIL 1230 PM CDT...
AT 951 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.
DOPPLER RADAR ESTIMATES THAT 3 TO 4 INCHES OF RAIN HAS FALLEN OVER
THE PAST FEW HOURS.
RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING
INCLUDE...WHITEHALL...BLAIR...FRANKLIN...TAYLOR...AND MELROSE. SOME
RIVER LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE ROARING
CREEK...TROUT RUN...DOUGLAS CREEK...BEAVER CREEK AND WHITE CREEK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS
AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES... AS WELL AS
FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.
&&
LAT...LON 4444 9115 4429 9089 4416 9090 4414 9097
4407 9098 4407 9115 4409 9117 4409 9120
4407 9121 4414 9149 4447 9144
$$
HALBACH635
WGUS73 KARX 181605
FFSARX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1105 AM CDT MON JUL 18 2011
WIC053-121-181730-
/O.CON.KARX.FF.W.0010.000000T0000Z-110718T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JACKSON WI-TREMPEALEAU WI-
1105 AM CDT MON JUL 18 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR CENTRAL TREMPEALEAU AND
SOUTHWESTERN JACKSON COUNTIES UNTIL 1230 PM CDT...
AT 1103 AM CDT...WEATHER SPOTTERS REPORTED THAT FLASH FLOODING WAS
OCCURRING SOUTH OF TAYLOR IN WESTERN JACKSON COUNTY. A NUMBER OF
ROADS HAVE BEEN WASHED OUT THERE DUE TO THE HEAVY RAIN THE FELL
EARLIER THIS MORNING. REPORTS HAVE INDICATED THAT OVER 4 INCHES OF
RAIN FELL ACROSS THE AREA FROM THESE STORMS. RAIN HAS ENDED ACROSS
THIS REGION...BUT RUNOFF WILL CONTINUE OVER THE NEXT FEW HOURS.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING
INCLUDE...WHITEHALL...BLAIR...FRANKLIN...TAYLOR...AND IRVING.
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 4444 9115 4429 9089 4416 9090 4414 9097
4407 9098 4407 9115 4409 9117 4409 9120
4407 9121 4414 9149 4447 9144
$$
HALBACH422
WGUS73 KARX 181722
FFSARX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1222 PM CDT MON JUL 18 2011
WIC053-121-181738-
/O.EXP.KARX.FF.W.0010.000000T0000Z-110718T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JACKSON WI-TREMPEALEAU WI-
1222 PM CDT MON JUL 18 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR CENTRAL TREMPEALEAU
AND SOUTHWESTERN JACKSON COUNTIES WILL BE ALLOWED TO EXPIRE AT 1230
PM CDT...
EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.
LAT...LON 4444 9115 4429 9089 4416 9090 4414 9097
4407 9098 4407 9115 4409 9117 4409 9120
4407 9121 4414 9149 4447 9144
$$
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, 9:01 AM CDT | Severe Thunderstorm Warning | ARX | Jackson, Trempealeau | 44 min |
| Jul 18, 9:32 AM CDT | Flash Flood Warning | ARX | Jackson, Monroe | 3 hr |
| 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.