Area Forecast Discussion
Issued by NWS La Crosse, WI

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FXUS63 KARX 250825
AFDARX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LA CROSSE WI
325 AM CDT SAT OCT 25 2014

.SHORT TERM...(TODAY AND TONIGHT)
ISSUED AT 217 AM CDT SAT OCT 25 2014

DISSIPATION OF FOG AND CLOUD TRENDS THE PRIMARY FOCUS TODAY.
BEYOND THIS ATTENTION TURNS TO TEMPERATURES.

07Z NEPHANALYSIS SHOWS WEAK TROUGH MOVING THROUGH THE REGION.
AHEAD OF IT...LOW CLOUDS AND FOG CONTINUE...WHILE TO THE WEST OF
IT BETTER MIXING WITH NORTHWEST WINDS AND DRIER AIR ARE RAPIDLY
CLEARING SKIES. ONLY CAVEAT TO THIS IS BAND OF MID CLOUD REACHING
FROM MT/ND DOWN INTO SD/MN. THIS WILL MOVE INTO THE AREA THIS
MORNING.

COLD ADVECTION WILL OFFSET AMPLE SUNSHINE TODAY...WITH HIGHS
TOPPING OUT FROM THE UPPER 50S TO MIDDLE 60S.

.LONG TERM...(SUNDAY THROUGH FRIDAY)
ISSUED AT 217 AM CDT SAT OCT 25 2014

LONG WAVE RIDGING ACROSS THE REGION FOR THE WEEKEND...SHIFTS EAST
AS A SIGNIFICANT TROUGH THAT IS CURRENTLY ALONG THE CONUS WEST
COAST MOVES ACROSS THE ROCKIES AND INTO THE UPPER MIDWEST TO START
THE WEEK. INITIAL SURGE OF WARM ADVECTION AND ISENTROPIC LIFT
SHOULD HELP FUEL SHOWERS AND A FEW THUNDERSTORMS FROM CENTRAL MN
INTO WI SUNDAY NIGHT. BEST CHANCES LOOK TO LIE ALONG AND NORTH OF
THE I-94 CORRIDOR. A BRIEF DRY PERIOD LOOKS LIKELY MONDAY MORNING
AS THE MAIN WARM ADVECTION WING MOVES NORTH. BUT THE COLD FRONT
WILL SWEEP IN LATER MONDAY AND MONDAY NIGHT. TEMPERATURES LOOK TO
BE QUITE MILD IN THE WARM SECTOR...WITH HIGHS REACHING THE LOWER
70S ACROSS IA AND SOUTHERN WI.

TROUGH SHIFTS EAST TUESDAY WITH THE ASSOCIATED SURFACE COLD FRONT
ALSO MOVING THROUGH. TEMPERATURES WILL FALL BACK TO NEAR OR EVEN
SLIGHTLY BELOW NORMAL TO COMPLETE THE WEEK. IN FACT...ANOTHER
REINFORCING SURGE OF COLD AIR LOOKS TO INVADE BY FRIDAY...WITH
HIGHS ONLY IN THE 40S.

&&

.AVIATION...(FOR THE 06Z TAFS THROUGH 06Z SATURDAY NIGHT)
ISSUED AT 1157 PM CDT FRI OCT 24 2014

THE DRIER AIR FROM THE WEST HAS FINALLY BEGUN TO WORK INTO THE
AREA AS THE DEW POINT HAS DROPPED DOWN INTO THE UPPER 40S AT BOTH
KTOB AND KAUM. IN RESPONSE TO THIS...THE VISIBILITY HAS COME UP TO
MVFR AT KTOB BUT HAS BEEN SLOW TO BEGIN IMPROVING ELSEWHERE. THE
25.03Z RAP AND 25.00Z NAM CONTINUE TO SUGGEST THE WIND SHIFT AND
DRIER AIR WILL WORK INTO KRST BY 06Z...BUT THIS SEEMS OPTIMISTIC
AND WILL HOLD ONTO THE DENSE FOG A LITTLE LONGER BEFORE FINALLY
ALLOWING THE WIND SHIFT WITH THE DEVELOPMENT OF VFR CONDITIONS TO
OCCUR AROUND 08Z. KLSE MAY NOT SEE MUCH OF A VISIBILITY
RESTRICTION DUE TO THE LACK OF ANY CLEARING SO EXPECT THE MVFR TO
IFR CEILINGS TO REMAIN IN PLACE UNTIL ABOUT 10Z OR SO...FOLLOWED
BY VFR CONDITIONS. HIGH PRESSURE THEN BUILDS IN FOR THE REMAINDER
OF SATURDAY WITH LITTLE OR NO CLOUD COVER. THE NAM STILL INDICATES
THE POTENTIAL FOR SOME WIND GUSTS TO AROUND 20 KNOTS SATURDAY
AFTERNOON IN THE MIXED LAYER.


&&

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

$$

SHORT TERM...MW
LONG TERM...MW
AVIATION...04



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