Severe Thunderstorm Warning 103, NWS La Crosse, WI

064 
WWUS53 KARX 031305
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
805 AM CDT SAT SEP 3 2011

WIC019-119-031330-
/O.CON.KARX.SV.W.0103.000000T0000Z-110903T1330Z/
CLARK WI-TAYLOR WI-
805 AM CDT SAT SEP 3 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN TAYLOR
AND NORTHERN CLARK COUNTIES UNTIL 830 AM CDT...

AT 800 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM WESTBORO TO
MEDFORD TO OWEN TO THORP...MOVING EAST AT 35 MPH. THESE STORMS CAN
PRODUCE QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  CHELSEA AROUND 810 AM...
  WESTBORO AND DORCHESTER AROUND 815 AM...
  RIB LAKE AND ABBOTSFORD AROUND 825 AM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THESE STORMS...PREPARE IMMEDIATELY FOR
LARGE HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4489 9080 4517 9059 4537 9058 4539 9010
      4523 9004 4517 9003 4511 9006 4511 9019
      4504 9019 4503 9020 4503 9031 4487 9031
TIME...MOT...LOC 1305Z 271DEG 29KT 4535 9042 4518 9035
          4500 9047 4490 9064
WIND...HAIL 60MPH 1.00IN

$$

DAS

022 
WWUS53 KARX 031316
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
816 AM CDT SAT SEP 3 2011

WIC019-119-031330-
/O.CON.KARX.SV.W.0103.000000T0000Z-110903T1330Z/
CLARK WI-TAYLOR WI-
816 AM CDT SAT SEP 3 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN TAYLOR
AND NORTHEASTERN CLARK COUNTIES UNTIL 830 AM CDT...

AT 814 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM WESTBORO TO
MEDFORD TO DORCHESTER TO OWEN...MOVING EAST AT 35 MPH. THESE STORMS
CAN PRODUCE QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  ABBOTSFORD AROUND 825 AM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THESE STORMS...PREPARE IMMEDIATELY FOR
LARGE HAIL AND DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4489 9070 4515 9043 4538 9039 4539 9010
      4523 9004 4517 9003 4511 9006 4511 9019
      4504 9019 4503 9020 4503 9031 4487 9031
TIME...MOT...LOC 1316Z 271DEG 29KT 4535 9026 4518 9019
          4500 9032 4490 9049
WIND...HAIL 60MPH 1.00IN

$$

DAS

689 
WWUS53 KARX 031329
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
829 AM CDT SAT SEP 3 2011

WIC019-119-031339-
/O.EXP.KARX.SV.W.0103.000000T0000Z-110903T1330Z/
CLARK WI-TAYLOR WI-
829 AM CDT SAT SEP 3 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN TAYLOR AND
NORTHEASTERN CLARK COUNTIES WILL EXPIRE AT 830 AM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED AND WAS 
MOVING EAST OUT OF THE WARNED AREA.

LAT...LON 4489 9070 4515 9043 4538 9039 4539 9010
      4523 9004 4517 9003 4511 9006 4511 9019
      4504 9019 4503 9020 4503 9031 4487 9031
TIME...MOT...LOC 1329Z 271DEG 29KT 4534 9011 4517 9004
          4499 9017 4489 9035

$$

DAS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LA CROSSE WI
300 AM CDT SAT SEP 3 2011

.SHORT TERM...TODAY THROUGH TUESDAY NIGHT

FORECAST CONCERNS FOCUS ON THE STORMS TODAY...THEN QUIET AND COOLER
FOR THE REST OF THE HOLIDAY WEEKEND.

LOW LEVEL MOISTURE TRANSPORT FOCUSED INTO AND ACROSS A WEST-EAST
RUNNING FRONT ACROSS IA/ILL...ALONG WITH THE AID OF AN UPPER LEVEL
SHORTWAVE TROUGH PUSHING EAST ACROSS THE UPPER MISSISSIPPI RIVER
VALLEY...WERE SPARKING SHOWERS/STORMS ACROSS IA/SOUTHWEST WI EARLY
THIS MORNING. MLCAPE OVER 1000 J/KG AND EFFECTIVE SHEAR IN THE 30 KT
RANGE WAS HELPING MAKE SOME OF THE STORMS STRONG TO SEVERE.

THE 03.00Z NAM AND GFS SUGGEST THE SFC BOUNDARY WILL BE NUDGED A BIT
NORTH TODAY...LAYING FROM NORTHERN IA-SOUTHERN WI. 850 MB MOISTURE
TRANSPORT WILL CONTINUE TO DRIVE INTO AND ACROSS THE BOUNDARY.
MEANWHILE TO THE NORTHWEST A SHORTWAVE TROUGH WILL BE PUSHING ACROSS
MN BY 18Z...WITH A SFC COLD FRONT ON THE LEADING EDGE OF THE UPPER
LEVEL TROUGH. THESE WEATHER ELEMENTS WILL MERGE INTO ONE SYSTEM AS
THEY MOVE EAST ACROSS THE EASTERN GREAT LAKES TONIGHT. THE HIGHER
INSTABILTY WILL BE LOCATED ALONG AND SOUTH OF THE WEST-EAST SFC
BOUNDARY WITH MUCAPES OF 2500-3500 J/KG. THE STRONGER 0-6 KM SHEAR
IS ASSOCIATED WITH THE NORTHWEST TROUGH/COLD FRONT...HOWEVER...0-3
KM SHEAR AROUND THE WEST-EAST FRONT IS 30-35 KTS //FAVORABLE FOR
STRONG-DAMAGING WINDS//. THE MIX OF INSTABILTY/SHEAR AND FORCING
WOULD SUGGEST THE MAIN SEVERE THREAT TODAY WILL COME FROM THE
CURRENT CONVECTION TRACKING EAST ACROSS IA INTO ILL/SOUTHERN
WI...AND PERHAPS LATER TODAY OVER SOUTHERN WI/EASTERN IA/ILL.
HOWEVER...DON/T THINK WE CAN COMPLETELY RULE OUT STRONGER-POSSIBLE
SEVERE STORMS ALONG THE COLD FRONT...ALTHOUGH THAT THREAT MAY LIE
MORE ACROSS NORTHERN SECTIONS OF MN/WI.

THE PRESSURE GRADIENT TIGHTENS POST THE DEPARTING LOW LATE TONIGHT
THROUGH SUNDAY. APPRECIABLE DOWNGLIDE ON THE ISENTROPIC SFCS...WITH
STRONG LOW LEVEL COLD AIR ADVECTION AND SUBSIDENCE. EXPECT THE WINDS
TO INCREASE AND BECOME GUSTY AS A RESULT. THE WIND FIELD IN THE
VERTICAL ISN/T PARTICULARLY STRONG THOUGH PER BUFKIT SOUNDINGS...BUT
GUSTS UP 25 TO 30 MPH LOOK POSSIBLE SUN AFTERNOON FOR THE USUAL
WINDY LOCALES/OPEN SPACES OF SOUTHEAST MN/NORTHEAST IA. 03.00Z
GFS/NAM SUGGEST LOW SATURATION BEING PULLING WELL WEST OF THE
DEPARTING LOW...AND EXPECT A GOOD AMOUNT OF CLOUDS FOR NORTHERN
PARTS OF THE UPPER MISSISSIPPI RIVER VALLEY. FARTHER SOUTH...COLD
AIR ADVECTION CU SHOULD DEVELOP ON THE FRINGES OF THE MAIN CLOUD
SHIELD...BUT SUNSHINE SHOULD BE PREVALENT GIVEN THE STRONG SINKING
AIR SIGNAL. WILL TAILOR CLOUDS FROM NORTH-SOUTH FOR THESE TRENDS.

A SFC HIGH WORKS OVER THE REGION FOR MON/TUE...AND A COUPLE SUNNY
AND DRY DAYS SHOULD RESULT. RIVER VALLEY FOG COULD BECOME A CONCERN
THANKS TO MOSTLY CLEAR NIGHTS AND LIGHTER SFC WIND FIELDS. THIS
POTENTIAL WOULD SEEM TO DEPEND ON HOW MUCH DECOUPLING OCCURS...AND
HOW DEEP THE LIGHT WINDS WILL EXTEND.

LOOK FOR MUCH COOLER TEMPS FOR SUN/MON...WITH 850 MB TEMPS FALLING
FROM 18 C AT 18 Z SAT...TO 3 C BY 12Z MON. HIGHS IN THE 60S WITH
LOWS IN THE 40S CAN BE EXPECTED.

.LONG TERM...WEDNESDAY THROUGH SATURDAY

BOTH THE GFS AND ECMWF CONTINUE TO POINT TO STRONG RIDGING OVER THE
WEST...WITH A TROUGH OVER THE EAST. UNLIKE SOME PREVIOUS RUNS
THOUGH...THE UPPER LEVEL FLOW ISN/T AS AMPLIFIED...PLUS THEY NOW
BRING THE REMNANTS OF THE TROPICAL SYSTEM NORTHWARD UP THE
MISSISSIPPI RIVER VALLEY. THE GFS AND EC PUT THE BRAKES ON IT WHEN
IT REACHES THE OH RIVER VALLEY BY THU...RETROGRADING IT A BIT WEST
BEFORE FORCING IT BACK SOUTH AS AN UPPER LEVEL SHORTWAVE TROUGH
DIVES ACROSS THE GREAT LAKES NEXT WEEKEND. LOCALLY...A SFC HIGH
WOULD STILL REMAIN THE DOMINANT WEATHER FEATURE...AND DRY CONDITIONS
WOULD PREVAIL. CERTAINLY...THE SCENARIO BARES WATCHING AS A PUSH
FARTHER NORTH WOULD LEAD TO A STRONGER WETTING POTENTIAL.
OTHERWISE...THE SOLUTIONS FAVOR QUIET AND NEAR SEASONABLE TEMPS.

&&

.AVIATION...TODAY THROUGH TONIGHT

ACTIVE WEATHER WEATHER TO CONTINUE TODAY AS A VIGOROUS MID-LEVEL
TROUGH/SURFACE COLD FRONT MOVES THROUGH THE REGION. OCCASIONAL
SHRA/TS WILL RESULT. HIGHEST SEVERE THREAT APPEARS TO BE SOUTH OF
THE KLSE/KRST TAF SITES ACROSS NORTHEAST IA/FAR SOUTHWEST WI WHERE
BETTER INSTABILITY AND WIND SHEAR WILL EXIST THIS MORNING/TODAY.
EXPECT PREDOMINANT MVFR CONDITIONS THROUGH THIS MORNING...WITH
POCKETS OF IFR IN FOG AND HEAVIER SHOWER/TS ACTIVITY. COLD FRONT
THEN EXITS EAST OF THE AREA THIS EVENING WITH CONDITIONS IMPROVING
INTO VFR AS CLOUDS SCATTERED FROM WEST TO EAST. HIGH PRESSURE
BUILDING IN FROM THE PLAINS EXPECTED TO KEEP VFR CONDITIONS GOING
THROUGH TONIGHT WITH NORTHWEST WINDS STAYING UP IN THE 5 TO 10 MPH
RANGE.

&&

.ARX WATCHES/WARNINGS/ADVISORIES...
WI...NONE.
MN...NONE.
IA...NONE.
&&

SHORT/LONG TERM... RIECK
AVIATION.......... DAS

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LA CROSSE WI
540 AM CDT SAT SEP 3 2011

IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-032>034-
041>044-053>055-061-041000-
ADAMS-ALLAMAKEE-BUFFALO-CHICKASAW-CLARK-CLAYTON-CRAWFORD-DODGE-
FAYETTE-FILLMORE-FLOYD-GRANT-HOUSTON-HOWARD-JACKSON-JUNEAU-LA CROSSE-
MITCHELL-MONROE-MOWER-OLMSTED-RICHLAND-TAYLOR-TREMPEALEAU-VERNON-
WABASHA-WINNESHIEK-WINONA-
540 AM CDT SAT SEP 3 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF NORTHEAST IOWA...
SOUTHEAST MINNESOTA...AND SOUTHWEST INTO CENTRAL WISCONSIN.

.DAY ONE...TODAY AND TONIGHT

NUMEROUS THUNDERSTORMS CAN BE EXPECTED TODAY INTO THE EARLY EVENING
HOURS. A FEW OF THE STORMS COULD BECOME STRONG TO SEVERE...WITH
LARGE HAIL...DAMAGING WINDS...AND HEAVY RAIN THE MAIN THREATS.
PORTIONS OF NORTHEAST IOWA AND SOUTHWEST WISCONSIN RECEIVED 2 TO 3
INCHES OF RAIN ALREADY TODAY...AND ADDITIONAL HEAVY RAINFALL IN
THOSE AREAS WOULD LIKELY RESULT IN FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION COULD BE NEEDED TODAY.

.EMERGENCY MANAGEMENT COORDINATION...

NO WEBINAR IS SCHEDULED.

RIECK

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
206 AM CDT SAT SEP 3 2011

IAZ019-029-030-030800-
CHICKASAW-CLAYTON-FAYETTE-
206 AM CDT SAT SEP 3 2011

AT 200 AM...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 8 MILES
WEST OF COUNTY ROADS 3 AND W 13...MOVING NORTHEAST AROUND 45 MPH.

WIND GUSTS OF 40 TO 50 MPH MAY ACCOMPANY THIS STRONG THUNDERSTORM.

LOCATIONS THAT MAY BE AFFECTED INCLUDE...
OELWEIN...FAYETTE...MAYNARD...ARLINGTON...STRAWBERRY
POINT...ELKADER...AND GARBER.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 AM SATURDAY
MORNING FOR NORTHEAST IOWA AND SOUTHWEST WISCONSIN.

THIS STORM WILL HAVE FREQUENT LIGHTNING. LIGHTNING CAN BE A KILLER
AND MAY STRIKE MILES AWAY FROM THE STORM. MOVE INDOORS OR FIND A
VEHICLE TO SHELTER IN.

HEAVY RAIN COULD LEAD TO MINOR FLOODING OR A SHORT PERIOD OF STANDING
WATER. STAY CLEAR OF DRAINAGE AREAS AND AVOID AREAS OF HIGH WATER IF
THEY DEVELOP.

DAS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
402 AM CDT SAT SEP 03 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0153 AM     TSTM WND GST     BOSCOBEL                43.14N 90.70W
09/03/2011  E60 MPH          GRANT              WI   TRAINED SPOTTER

            SMALL TREE LIMBS BLOWN INTO THE ROAD.

&&

DAS

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
507 AM CDT SAT SEP 3 2011

WIZ061-031100-
GRANT-
507 AM CDT SAT SEP 3 2011

AT 505 AM...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS FROM NEAR
LANCASTER AND BURTON...MOVING EAST AT 35 MPH.

WIND GUSTS OF UP TO 40 MPH AND TORRENTIAL DOWNPOURS MAY ACCOMPANY
THESE STRONG THUNDERSTORMS.

LOCATIONS THAT MAY BE AFFECTED INCLUDE...
FENNIMORE...DICKEYVILLE...PLATTEVILLE AND CUBA CITY.

HEAVY RAIN COULD LEAD TO MINOR FLOODING OR A PERIOD OF STANDING
WATER. STAY CLEAR OF DRAINAGE AREAS AND AVOID AREAS OF HIGH WATER IF
THEY DEVELOP.

DAS

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
742 AM CDT SAT SEP 3 2011

WIZ017-029-031345-
CLARK-TAYLOR-
742 AM CDT SAT SEP 3 2011

AT 737 AM...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS FROM JUMP
RIVER TO THORP...MOVING EAST AT 30 MPH.

WIND GUSTS UP TO 45 MPH AND SMALL HAIL MAY ACCOMPANY THESE STRONG
THUNDERSTORMS.

LOCATIONS THAT MAY BE AFFECTED INCLUDE...
OWEN...OWEN...MEDFORD...CHELSEA AND WESTBORO.

BE ALERT FOR STORMS THAT MAY PRODUCE LARGE HAIL. MOVE INDOORS AND
AWAY FROM WINDOWS IF A WARNING IS ISSUED.

DAS