NWS ALY Long Term Discussion
LONG TERM /SUNDAY THROUGH WEDNESDAY/...
A LOT OF UNCERTAINTY REGARDING THE EXTENDED PERIOD...BUT THERE IS
THE POTENTIAL FOR SOME ACTIVE WEATHER. IN A SEASON WHEN TRADITIONAL
WINTER WEATHER EVENTS HAVE BEEN RATHER FEW AND FAR BETWEEN...PEOPLE
WHO ARE FOND OF SNOW MAY FIND THIS UPCOMING STRETCH OF WEATHER TO BE
OF SOME INTEREST.
THE WEATHER FOR EARLY NEXT WEEK GETS A BIT MORE COMPLICATED...AND
MODEL/ENSEMBLE GUIDANCE HAS SHOWN LITTLE RUN TO RUN CONSISTENCY.
HOWEVER...MOST MODELS LOOK TO SHOW A DEVELOPING AREA OF LOW PRESSURE
OFF THE SOUTHEAST COAST WITHIN THE SOUTHERN STREAM...WHILE ANOTHER
NORTHERN STREAM SYSTEM MOVES ACROSS THE NORTHERN PLAINS AND GREAT
LAKES WITH A DEEPENING AND HIGH AMPLITUDE UPPER LEVEL TROUGH.
AT THIS POINT...IT APPEARS THAT THIS FIRST SOUTHERN STREAM SYSTEM
MAY WIND UP MISSING OUR AREA TO THE EAST FOR MONDAY...PERHAPS
BRUSHING PARTS OF EASTERN NEW ENGLAND WITH SOME LIGHT SNOW BEFORE
HEADING OUT TO SEA. TEMPS LOOK SEASONABLE ON MONDAY WITH HIGHS IN
THE MID 20S TO MID 30S WITH A MIX OF SUN AND CLOUDS.
HOWEVER...AS THE UPPER LEVEL TROUGH COMES EASTWARD FOR MON NIGHT
INTO TUESDAY...IT WILL START TO TAKE ON A NEGATIVE TILT. THIS COULD
ALLOW YET ANOTHER COASTAL LOW TO DEVELOP OFF THE MID ATLANTIC COAST
AND MOVE NORTHEAST...AS THE UPPER LEVEL TROUGH STARTS TO CLOSE OFF
AND MOVE TOWARDS THE TENNESSEE VALLEY AND MID ATLANTIC REGION FOR THE
MIDDLE OF THE WEEK. THE DETERMINISTIC GUIDANCE IS STILL QUITE
UNCLEAR ON THE SFC TRACK OF THIS ADDITIONAL COASTAL WAVE...AND IF IT
WILL COME CLOSE ENOUGH TO BRING SNOW TO OUR AREA. WHILE THE LATEST
12Z RUNS OF THE GFS/ECWMF SUGGEST THIS STORM MAY ALSO BE TOO FAR
EAST TO BRING A WIDESPREAD SNOW TO OUR AREA...THE 12Z GEFS HAVE A
LARGE NUMBER OF ENSEMBLE MEMBER BRINGING THE STORM TOWARDS OUR AREA.
EVEN IF THE SFC WAVES MISSES OUR REGION...A PERIOD OF LIGHT SNOW
WOULD BE POSSIBLE WITH THE PASSAGE OF THE UPPER LEVEL DISTURBANCE
FOR TUESDAY INTO WEDNESDAY AS WELL.
"You just need to go at that shit wide open, hang on, and own it." —Camp