Area Forecast Discussion
Issued by NWS Milwaukee/Sullivan, WI

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FXUS63 KMKX 272100
AFDMKX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
400 PM CDT SUN JUL 27 2014

.SHORT TERM...

.TONIGHT AND MONDAY...FORECAST CONFIDENCE...HIGH

SHOWERS AND STORMS WILL WIND DOWN QUICKLY THIS EVENING AS DAYTIME
HEATING IS LOST. CLOUDS WILL THEN DIMINISH THROUGH THE EVENING AND
INTO TONIGHT AS DRIER AIR PUSHES IN FROM THE NORTH.

EXPECT MOSTLY SUNNY SKIES MONDAY AS HIGH PRESSURE PUSHES INTO THE
REGION...WITH MAYBE SCATTERED AFTERNOON CUMULUS. HIGHS WILL BE A FEW
DEGREES BELOW NORMAL...MAKING FOR A VERY PLEASANT DAY.


.TUESDAY AND WEDNESDAY...FORECAST CONFIDENCE...HIGH

THE MID/UPPER TROUGH CONTINUES TO DIG ACROSS THE EASTERN U.S.
TUESDAY AND WEDNESDAY AS SEVERAL WEAK SHORTWAVES ROTATE AROUND THE
MAIN UPPER LOW CENTERED NEAR OR JUST SOUTH OF JAMES BAY CANADA.
500 MB TEMPERATURES ARE AROUND -15 AND -16 TUESDAY BUT BEGIN TO
SLOWLY MODERATE ON WEDNESDAY. HOWEVER INSTABILITY REMAINS AS LOW
LEVELS ALSO BEGIN TO WARM A LITTLE. 700 MB UPWARD MOTION EXISTS
BOTH TUESDAY AND WEDNESDAY AFTERNOON AS THE WEAK SHORTWAVES
COINCIDE WITH DIURNAL HEATING. 850-700 MB RH IS RATHER HIGH...
ESPECIALLY AT 850 MB. ZERO TO 1 KM MIXED LAYER CAPE IS AROUND 150
TO 200 JOULES/KG AND EQUILIBRIUM LEVELS NEAR 20 THSD FT.
THEREFORE SCATTERED DIURNAL SHOWERS...SHOULD OCCUR BOTH TUESDAY
AND WEDNESDAY.

HIGH PRESSURE BECOMES CENTERED OVER THE EASTERN PLAINS AND UPPER
MISSISSIPPI VALLEY. MORNING LOWS WILL DEPEND ON HOW MUCH CLOUDS
DISSIPATE OVERNIGHT.

.LONG TERM...

.THURSDAY AND FRIDAY...FORECAST CONFIDENCE...HIGH

CONTINUED VERY GOOD AGREEMENT IN THE GFS/ECMWF AND DGEX. THE
EASTERN U.S. TROUGH BECOMES MORE BROAD AND BEGINS TO RETROGRADE
A LITTLE TOWARD THE WEST. THIS KEEPS MORE DIURNAL PRECIPITATION
CHANCES AND CONTINUES THE RATHER COOL SUMMER TEMPERATURES.

MAINLY THE GFS BRINGS A WEAK SHORTWAVE INTO WISCONSIN FROM THE
NORTH THURSDAY NIGHT AND FRIDAY WITH THE GFS GENERATING A LITTLE
PRECIPITATION INTO THURSDAY NIGHT AND FRIDAY MORNING...ALONG WITH
THE AFTERNOON DIURNAL INCREASE THAT IS ON BOTH THE GFS AND ECMWF.

VERY LITTLE SURFACE PRESSURE GRADIENT ACROSS MUCH OF THE U.S. BY
THIS TIME. MESO WIND PATTERNS ASSOCIATED WITH THE GREAT LAKES
SHOULD DOMINATE.

.SATURDAY AND SUNDAY...FORECAST CONFIDENCE...HIGH

GFS AND ECMWF MODELS ARE STILL VERY SIMILAR. THERE IS STILL A
MID/UPPER TROUGH OVER THE GREAT LAKES TO MISSISSIPPI.

THE BROAD SURFACE HIGH REMAINS NEAR THE GREAT LAKES. BOTH THE
ECMWF AND GFS REDUCE THE AMOUNT OF LIGHT DIURNAL PRECIPITATION
DURING THE AFTERNOON AND EARLY EVENING...WITH THE ECMWF MAINLY DRY
BY SUNDAY.

&&

.AVIATION/00Z TAFS/...

SHOWERS AND STORMS WILL WIND DOWN QUICKLY THIS EVENING AS DAYTIME
HEATING IS LOST.

WILL CONTINUE TO MONITOR POSSIBLE MVFR CIGS AS MAIN COLD POOL ALOFT
PUSHES THROUGH TONIGHT...THOUGH MODEL SOUNDINGS AND MOS STILL
SUGGEST VFR CIGS.

IT LOOKS PRETTY QUIET THEN MONDAY AS HIGH PRESSURE MOVES INTO THE
AREA.

&&

.MARINE...

A SMALL CRAFT ADVISORY REMAINS IN EFFECT THROUGH THE DAY MONDAY.
WINDS WILL TURN NORTHERLY BY EVENING...REMAINING GUST INTO MONDAY
MORNING. WINDS WILL WIND DOWN MONDAY AFTERNOON...WITH WAVES
DIMINISHING BY EVENING.

&&

.BEACHES...

INCREASING NORTH WINDS WILL BRING BUILDING WAVES TO THE BEACHES
FROM SHEBOYGAN SOUTH THROUGH KENOSHA COUNTY. WAVES WILL REACH 3 TO
4 FEET ALONG THE SHORELINE BY EARLY THIS EVENING...BUILDING TO 4
TO 7 FEET TONIGHT...THEN DIMINISHING SLOWLY THROUGH THE AFTERNOON
INTO THE EARLY EVENING ON MONDAY. A BEACH HAZARDS STATEMENT IS IN
EFFECT FROM THIS EVENING THROUGH MONDAY EVENING.

&&

.MKX WATCHES/WARNINGS/ADVISORIES...
WI...BEACH HAZARDS STATEMENT FROM 7 PM CDT THIS EVENING THROUGH
     MONDAY EVENING FOR WIZ052-060-066-071-072.

LM...SMALL CRAFT ADVISORY UNTIL 7 PM CDT MONDAY FOR LMZ645-646.

     SMALL CRAFT ADVISORY UNTIL 4 PM CDT MONDAY FOR LMZ643-644.

&&

$$

TONIGHT/MONDAY AND AVIATION/MARINE...DDV
MONDAY NIGHT THROUGH SUNDAY...HENTZ



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