FULL WEATHER: .SYNOPSIS...
HIGH PRESSURE SLIDING OFF THE NEW ENGLAND COAST THIS AFTERNOON IS MAKING WAY
FOR A LOW PRESSURE SYSTEM PASSING SOUTH OF LONG ISLAND AND OUTSIDE THE
BENCHMARK.
LIGHT SNOWFALL IS EXPECTED ACROSS SOUTHERN VERMONT AND ALONG THE
SPINE OF THE GREENS, GENERALLY 1 TO 4 INCHES. A SIGNIFICAN
WARMING TREND IS EXPECTED MONDAY THROUGH WEDNESDAY OF NEXT WEEK,
ALONG WITH INCREASING CHANCES FOR RAIN. NEAR RECORD HIGH TEMPERATURES
ARE POSSIBLE TUESDAY INTO WEDNESDAY, WITH HIGHS WELL INTO THE 50S AND
POSSIBLY LOWER 60S.
&&.NEAR TERM /THROUGH SUNDAY NIGHT/...
AS OF 916 PM EST SATURDAY...OVER ALL, FORECAST IS ON TRACK WITH MINOR UPDATES
MADE TO POPS AND TEMPERATURE GRIDS. WHILE RADAR LOOKS LIKE
SNOW HAS OVERSPREAD THE NORTH COUNTRY, MUCH OF THE LEADING EDGE IS
VIRGA AS PRECIPITATION IS EVAPORATED IN THE DRY MID AND LOW LEVELS.
HOWEVER, LATEST OBSERVATIONS UPSTREAM OVER SOUTHERN VERMONT/CENTR
AL NEW YORK SHOW DEWPOINTS RISING QUICKLY AS DEEP MOISTURE
PUSHES IN FROM THE SOUTHWEST AND WET BULBING MOISTENS THE COLUMN. AREAS
OF SOUTHWESTERN VERMONT ARE ALREADY REPORTING SNOW AT THE
SURFACE, SO GIVEN THE FAIRLY QUICK MOISTENING OF THE COLUMN SEEN UPSTREAM,
EXPECT SNOW TO START OVER MOST OF VERMONT BY MIDNIGHT.
PREVIOUS DISCUSSION...AS HIGH PRESSURE MOVES AWAY FROM THE REGION THIS
EVENING, A LOW PRESSURE SYSTEM WILL BE SKIMMING THE NEW ENGLAND COAST TO THE
SOUTH. SOME LIGHT SNOW WILL SPREAD INTO VERMONT AFTER ABOUT 11PM.
VERY PROGRESSIVE MID-LEVEL FLOW IS IN PLACE, AND WILL PUSH THIS
SYSTEM EAST OF THE REGION PRETTY QUICKLY. ALL SNOW SHOULD FALL BY ABOUT
8AM. SNOWFALL TOTALS WILL RANGE FROM AROUND AN INCH OR LESS ACROSS NORTHERN NEW
YORK TO TWO TO FIVE INCHES IN SOUTHERN VERMONT. THERE MAY BE SOME
HIGHER TOTALS ALONG THE SPINE OF THE GREENS AS WELL. CLOUDS AND SNOW
WILL KEEP OVERNIGHT TEMPS MILD, RANGING THROUGH THE 20S. ANOTHER
RIDGE OF SURFACE HIGH PRESSURE WILL BUILD INTO THE AREA SUNDAY AND SUNDAY
NIGHT FROM THE SOUTH. WILL TAKE A BIT TO PUSH THE REST OF THE MOISTURE
EASTWARDS ON SUNDAY, BUT WE SHOULD SEE SOME SUNSHINE BY THE AFTERNOON,
ESPECIALLY IN THE CHAMPLAIN VALLEY.
WE MAY ALSO SEE SOME UPSLOPE SNOW SHOWERS LINGERING THROUGH THE
MORNING HOURS IN THE NW FACING SLOPES OF THE GREENS.
TEMPERATURES WILL BE ABOVE NORMAL AGAIN ON SUNDAY WITH SOME UPPER 30S IN
THE CHAMPLAIN AND SAINT LAWRENCE VALLEYS WITH LOWER TO MID 30S
ELSEWHERE.
GUSTY NW WINDS UPWARDS OF 20 MPH AT TIMES DURING THE AFTERNOON.
SUNDAY NIGHT HIGH PRESSURE CENTER DRIFTS EASTWARD AND PRESSURE GRADIENT WILL
BE INCREASING WITH A SOUTHERLY RETURN FLOW DEVELOPING.
SUNDAY NIGHT WILL ALSO FEATURE TEMPERATURES WELL ABOVE SEASONAL
NORMALS WITH MID 20S IN THE VALLEYS AND TEENS IN THE HIGHER ELEVATIONS.
&&.SHORT TERM /MONDAY THROUGH MONDAY NIGHT/...
AS OF 347 PM EST SATURDAY...HIGH PRESSURE WILL CONTINUE TO EXIT TO OUR EAST ON
MONDAY, PLACING THE REGION UNDER DEEP SOUTHWEST FLOW. HENCE
WELL SEE INCREASING WARM ADVECTION AND MOISTURE, LEADING TO A
PERIOD OF PRECIPITATION MONDAY AND MONDAY NIGHT.
ITLL TAKE A BIT FOR THE DRY AIR AT THE SURFACE TO SATURATE, SO PRECIPITATION WILL MOSTLY
HOLD OFF UNTIL MONDAY AFTERNOON, AND TEMPERATURES WILL BE ABOVE FREEZING IN
MOST AREAS BY THEN. SO EXPECT MOST LOCATIONS WILL SEE THE PRECIPITATION
START OUT AS RAIN, THOUGH A BIT OF SNOW GETTING TO T