Alert archive / Wisconsin / Flash Flood Warnings in 2015
Flash Flood Warning 7, NWS La Crosse, WI
NWS La Crosse, WI issued this flash flood warning at Sep 7, 2015, 1:05 PM CDT for Trempealeau County, Wisconsin. It was in force for 6 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
- Sep 7, 2015, 1:05 PM CDT (18:05 UTC)
- Expired
- Sep 7, 2015, 7:00 PM CDT
- In force
- 6 hr
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Flood severity
- Unknown
County Trempealeau County, WI
The radar
The La Crosse radar (KARX), 85 km from the middle of the area, began a volume at 18:05 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, 6.1 hours before the alert went out and 174 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1170 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
010 WGUS53 KARX 071805 FFWARX WIC121-080000- /O.NEW.KARX.FF.W.0007.150907T1805Z-150908T0000Z/ /00000.U.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 105 PM CDT MON SEP 7 2015 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * FLASH FLOOD WARNING FOR... A DAM FAILURE IN... NORTH CENTRAL TREMPEALEAU COUNTY IN WEST CENTRAL WISCONSIN... * UNTIL 700 PM CDT * AT 100 PM CDT...COUNTY DISPATCH REPORTED THE STRUM DAM HAS BREACHED AND MAY CAUSE FLASH FLOODING DOWNSTREAM ON THE BUFFALO RIVER THROUGH ELEVA. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE. THOSE DOWNSTREAM OF STRUM NEAR THE BUFFALO RIVER SHOULD BE PREPARED FOR FLOODING. && LAT...LON 4457 9137 4453 9137 4456 9153 4459 9153 $$ WETENKAMP
3 follow-up statements
814 WGUS73 KARX 071903 FFSARX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 203 PM CDT MON SEP 7 2015 WIC121-080000- /O.CON.KARX.FF.W.0007.000000T0000Z-150908T0000Z/ /00000.U.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/ TREMPEALEAU WI- 203 PM CDT MON SEP 7 2015 ...A FLASH FLOOD WARNING FOR A DAM BREACH REMAINS IN EFFECT UNTIL 700 PM CDT FOR NORTH CENTRAL TREMPEALEAU COUNTY... AT 159 PM CDT...EMERGENCY MANAGEMENT REPORTED A MECHANICAL DAM BREACH AT STRUM LAKE WHICH COULD CAUSE FLASH FLOODING DOWNSTREAM ON THE BUFFALO RIVER THROUGH ELEVA. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE. THOSE DOWNSTREAM OF STRUM NEAR THE BUFFALO RIVER SHOULD BE PREPARED FOR FLOODING. && LAT...LON 4457 9137 4453 9137 4456 9153 4459 9153 $$ WETENKAMP
865 WGUS73 KARX 071958 FFSARX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 258 PM CDT MON SEP 7 2015 WIC121-080000- /O.CON.KARX.FF.W.0007.000000T0000Z-150908T0000Z/ /00000.0.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/ TREMPEALEAU WI- 258 PM CDT MON SEP 7 2015 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR NORTH CENTRAL TREMPEALEAU COUNTY... AT 253 PM CDT...EMERGENCY MANAGEMENT REPORTED RISING WATER LEVELS ALONG THE BUFFALO RIVER DOWNSTREAM OF STRUM DUE TO INCREASING FLOW AT THE STRUM DAM. WATER LEVELS ARE HOLDING STEADY ON STRUM LAKE AT THIS TIME. RISING WATER LEVELS WERE OBSERVED AT ELEVA. PRECAUTIONARY/PREPAREDNESS ACTIONS... THOSE NEAR THE BUFFALO RIVER DOWNSTREAM OF STRUM SHOULD BE PREPARED FOR RISING WATER LEVELS AND POSSIBLE FLOODING. && LAT...LON 4457 9137 4453 9137 4456 9153 4459 9153 $$ WETENKAMP
569 WGUS73 KARX 072354 FFSARX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 654 PM CDT MON SEP 7 2015 WIC121-080001- /O.EXP.KARX.FF.W.0007.000000T0000Z-150908T0000Z/ /00000.0.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/ TREMPEALEAU WI- 654 PM CDT MON SEP 7 2015 ...THE FLASH FLOOD WARNING FOR NORTH CENTRAL TREMPEALEAU COUNTY WILL EXPIRE AT 700 PM CDT... THE TREMPEALEAU COUNTY EMERGENCY MANAGER REPORTED THAT THE WATER LEVELS ALONG THE BUFFALO RIVER WERE DECREASING IN OSSEO...STRUM AND TWO MILES EAST OF ELEVA. HOWEVER...THE WATER WAS STILL SLOWLY RISING IN ELEVA BUT IS EXPECTED TO BEGIN DECREASING BY THE MIDDLE OF THIS EVENING. THE IMPACTS FROM THE WATER RELEASE EARLIER TODAY OUT OF THE STRUM DAM HAVE JUST ABOUT ENDED AND THE WATER LEVELS ARE NO LONGER EXPECTED TO POSE A THREAT TO LIFE OR PROPERTY. PLEASE CONTINUE TO HEED ANY ROAD CLOSURES. LAT...LON 4457 9137 4453 9137 4456 9153 4459 9153 $$ 04
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 8:53 PM CDT | Areal Flood Advisory | ARX | Clark | 4 hr |
| Sep 6, 9:03 PM CDT | Special Weather Statement | ARX | Pepin | 57 min |
| Sep 6, 9:28 PM CDT | Areal Flood Advisory | ARX | Buffalo, Trempealeau | 4 hr |
| Sep 6, 9:45 PM CDT | Special Weather Statement | ARX | Clark | 45 min |
| Sep 6, 10:06 PM CDT | Flash Flood Warning | ARX | Clark, Jackson | 4 hr |
| Sep 7, 12:50 AM CDT | Areal Flood Advisory | ARX | Buffalo, Trempealeau | 6 hr |
| Sep 7, 1:47 AM CDT | Areal Flood Warning | ARX | Clark, Jackson | 9 hr |
| Sep 7, 6:46 AM CDT | Areal Flood Advisory | ARX | Trempealeau | 3 hr |
| Sep 7, 7:29 AM CDT | River Flood Warning | ARX | Jackson | 38 hr |
| Sep 7, 9:51 AM CDT | Areal Flood Advisory | ARX | Trempealeau | 4 hr |
Nearby
Flash Flood Warnings in Wisconsin, 2015Every flash flood warning in 2015
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.