NWS in Philly just put out an update at 5:55 pm, below. Still think the Turnpike may be the dividing line between minimal snow and some snow with <1" likely a bit west of the Turnpike and 1-2" likely along and just east of the Turnpike and 3" or more possible 15-25 miles east of the TPK. Still thinking we get 2" at my house on the colder surfaces. We'll see I guess. Would be amazed, though, if any snow is left after tomorrow afternoon.
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
555 PM EDT SUN MAR 20 2016
NEAR TERM /UNTIL 6 AM MONDAY MORNING/...
A QUICK UPDATE HAS BEEN ISSUED TO ADJUST
POPS UPWARD FASTER
ESPECIALLY ACROSS DELAWARE AND MUCH OF NEW JERSEY. WE ARE GETTING
REPORTS OF RAIN AND SNOW AND EVEN SOME SLEET EARLIER. THERE
APPEARS TO BE ENOUGH EVAPORATIVE COOLING AT THE ONSET ACROSS
INTERIOR NEW JERSEY ESPECIALLY TO ALLOW FOR ALL SNOW TO START THEN
MORE OF A MIX OF WET SNOW AND RAIN. THE RAIN AND RAIN/SNOW MIX
LOOKS TO CONTINUE FOR AWHILE LONGER BEFORE A TRANSITION TO MORE
SNOW AS THE EVENING PROGRESSES. THE WEATHER GRIDS WERE ALSO
ADJUSTED TO REFLECT THIS THINKING BETTER. A NEW SNOW
MAP HAS ALSO
BEEN POSTED TO THE WEB. TEMPERATURES,
DEW POINTS AND WINDS WERE
ALSO TWEAKED BASED ON THE LATEST OBSERVATIONS THEN SOME BLENDING
IN OF THE LAMP/LAV GUIDANCE WAS DONE.
THE HRRR RAMPS THINGS UP BETWEEN ABOUT 03Z AND 06Z WITH THE GREATEST
AREAL COVERAGE THROUGH ABOUT 06Z. GUIDANCE STILL SUGGESTS THE BEST
CHCS ARE THE FURTHER SOUTH AND EAST YOU GO. THERE LOOKS TO BE A
SHARP
CUTOFF TO THE WEST, BUT IT IS STILL UNCERTAIN AS TO EXACTLY
WHERE THAT
CUTOFF WILL BE. WE DO NOTE THAT THE
DEW POINTS ARE MUCH
MUCH LOWER
ATTM THE FARTHER NORTH AND WEST ONE
GOES. AS AN EXAMPLE
AT 21Z, THE
DEW POINT AT MOUNT POCONO WAS 3F WHILE AT GEORGETOWN
IT WAS 38F.
WITH NATURAL
DIURNAL COOLING, A TRANSITION TO SNOW IS EXPECTED DURING
THE EVENING HOURS. THIS CHANGE WILL BE ENHANCED WHERE PRECIP COMES
DOWN HEAVIEST, WHICH HAS THE BEST
CHC OF OCCURRING ALONG THE
COAST. THE
WINTER WEATHER ADVISORY REMAINS IN EFFECT AS IS, WITH
THESE AREAS HAVING THE GREATEST
CHC OF OBTAINING THE HIGHEST SNOW
AMOUNTS. THE BULK OF THE SNOW ACCUMULATIONS SHOULD BE ON NON-PAVED
SURFACES, HOWEVER SOME BANDING LATER THIS EVENING INTO THE
OVERNIGHT WOULD ALLOW FOR ENHANCED SNOWFALL RATES FOR A TIME AND
THIS IS WHEN AT LEAST SOME ACCUMULATION ON ROADWAYS CAN OCCUR. WE
ARE ANTICIPATING SNOW AMOUNTS TO REMAIN BELOW
WARNING CRITERIA.
http://forecast.weather.gov/product...&format=CI&version=1&glossary=1&highlight=off