000
FXUS63 KGRB 032342
AFDGRB

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREEN BAY WI
542 PM CST TUE DEC 3 2013

UPDATED AVIATION PORTION FOR 00Z TAF ISSUANCE

.SHORT TERM...TONIGHT AND WEDNESDAY
ISSUED AT 357 PM CST TUE DEC 3 2013

THERE ARE SEVERAL AREAS OF CONCERN DURING THIS PART OF THE
FORECAST...RESULTING IN A HIGH LEVEL OF UNCERTAINTY.

EAST-NORTHEAST FLOW OF COLD AND DRY AIR EAST OF AN INVERTED
SURFACE TROUGH WAS KEEPING TEMPERATURES BELOW FREEZING ACROSS MOST
OF THE FORECAST AREA DURING THE DAY. SNOW FELL OVERNIGHT INTO THIS
MORNING ACROSS THE NORTH CENTRAL PART OF THE STATE IN ASSOCIATION WITH
AN UPPER LEVEL SHORT WAVE THAT PASSED THROUGH WISCONSIN. THAT AREA
REMAINED DRY DURING THE AFTERNOON UNDER A VERY WEAK UPPER LEVEL
RIDGE. SOME LIGHT SNOW FELL ACROSS CENTRAL AND EAST CENTRAL
WISCONSIN DURING THE MORNING...WITH ISOLATED REPORTS OF LIGHT RAIN
OR DRIZZLE IN LOCATIONS THAT HAD TEMPERATURES ABOVE FREEZING.

PRECIPITATION INCREASED IN COVERAGE AND INTENSITY ACROSS MUCH OF
THE AREA DURING THE AFTERNOON AS A TIGHT BAROCLINIC ZONE SHIFTED
NORTH INTO CENTRAL AND EAST CENTRAL WISCONSIN DURING THE DAY.
HIGHER REFLECTIVITIES THAT SHOWED UP IN THE RADAR MOSAIC WERE
ASSOCIATED WITH A SHORT WAVE MOVING TOWARD THE AREA FROM SOUTHEAST
MINNESOTA THIS MORNING. EXPECT SOME MIXED OR FREEZING
PRECIPITATION ALONG WITH THIS FEATURE AS IT MAKES ITS WAY ACROSS
WISCONSIN AS TEMPERATURES AT THE SURFACE SHOULD BE NEAR OR BELOW
FREEZING AND WARMER AIR MOVES IN ALOFT.

PRECIPITATION SHOULD GRADUALLY SWITCH TO RAIN TONIGHT INTO
WEDNESDAY...EXCEPT IN THE NORTH WHERE SURFACE TEMPERATURES ARE NOT
LIKELY TO BE WARM ENOUGH FOR RAIN. EXPECT SOME ACCUMULATION OF ICE
IN NORTH CENTRAL WISCONSIN AFTER SNOWFALL TONIGHT. SO TRAVEL CONDITIONS
THERE COULD BECOME HAZARDOUS.

.LONG TERM...WEDNESDAY NIGHT THROUGH TUESDAY
ISSUED AT 357 PM CST TUE DEC 3 2013

WINTER STORM WILL BE DEPARTING WEDNESDAY NIGHT...OTHERWISE COLD
AIR POURS INTO THE REGION LATER WEDNESDAY NIGHT AND ESPECIALLY INTO
THURSDAY.

WINDS TOO WESTERLY FOR SIG LAKE EFFECT SNOWS THROUGH SATURDAY.
COMBO OF WINDS AND ARCTIC PROVIDE THE POTENTIAL OF WIND CHILL
HEADLINES LATER THIS WEEK BEFORE THE RIDGE OF HIGH PRESSURE AND
LIGHTER WINDS SETTLE INTO THE WEEKEND.

RETURN FLOW ON THE BACK SIDE BEGINS SUNDAY AS ANOTHER WESTERN
TROUGH DEVELOPS. MEDIUM RANGE MODEL BEGINNING TO FOCUS ON SURFACE
WAVE TRACKING OVER THE STATE TOWARD MONDAY WITH MORE ACCUMULATING
SNOW. ANOTHER SURGE OF ARCTIC AIR IS POISED TO POUR BACK INTO THE
REGION ON NORTHWEST WINDS IN THE LOWS WAKE.
&&

.AVIATION...FOR 00Z TAF ISSUANCE
ISSUED AT 540 PM CST TUE DEC 3 2013

EVEN AFTER THE PCPN BAND NOW WORKING ACRS THE AREA EXITS...
GENERALLY POOR FLIGHT CONDITIONS WL PERSIST WITH MOIST ELY FLOW.
THERE IS THE POTENTIAL FOR FZDZ ACRS MAINLY C-NE WI. SFC TEMPS IN
E-C SHOULD BE JUST WARM ENOUGH TO LIMIT THE ICING POTENTIAL THERE.
&&

.GRB WATCHES/WARNINGS/ADVISORIES...
WINTER WEATHER ADVISORY UNTIL MIDNIGHT CST TONIGHT FOR WIZ021-
022-039-040-073-074.

WINTER WEATHER ADVISORY UNTIL 9 PM CST THIS EVENING FOR
WIZ018>020-030-031-035>038.

WINTER STORM WATCH FROM 4 AM CST WEDNESDAY THROUGH WEDNESDAY
EVENING FOR WIZ005-010>012.
&&

$$

SHORT TERM.....MG
LONG TERM......TDH
AVIATION.......SKOWRONSKI