Winter Storm Warning Wednesday 10 a.m. through Thursday 7 a.m.
SYNOPSIS…
A RIDGE OF HIGH PRESSURE WILL EXIT EAST OF THE REGION TONIGHT
AS LOW PRESSURE OVER THE THE CENTRAL PLAINS TRACKS TOWARDS THE
OHIO VALLEY AND THE EASTERN GREAT LAKES. THE STORM WILL TRACK OVER
TORONTO WEDNESDAY NIGHT AND NORTH OF LAKE ONTARIO ON THURSDAY.
A WINTRY MIXTURE OF PRECIPITATION WILL AFFECT CENTRAL PENNSYLVANIA
WEDNESDAY INTO WEDNESDAY NIGHT…FOLLOWED BY COLDER CONDITIONS
WITH NUMEROUS SNOW SHOWERS AND POTENTIAL SNOW SQUALLS ON THURSDAY.
BELOW NORMAL TEMPERATURES AND TERRAIN- ENHANCED SNOW SHOWERS ARE
ANTICIPATED FOR THURSDAY NIGHT AND FRIDAY.
&&
.NEAR TERM /UNTIL 11 PM THIS EVENING/…
— Changed Discussion –IT`S A QUIET AFTERNOON AND THIS EVENING WILL CONTINUE TO BE
TRANQUIL WHILE MID TO HIGH CLOUDS INCREASE FROM WEST TO EAST.
SFC DEWPOINTS STARTING OUT IN THE MIDDLE TEENS WILL SLOWLY RISE
THROUGH THE UPPER TEENS THIS EVENING.– End Changed Discussion —
.SHORT TERM /11 PM THIS EVENING THROUGH 6 PM WEDNESDAY/…
PREVIOUS AND CURRENT THINKING IN GOOD AGREEMENT ON YET ANOTHER
MIXED PRECIPITATION EVENT FOR THE AREA ON WEDNESDAY. LOW PRESSURE
WILL TRACK NORTHEASTWARD INTO THE EASTERN GREAT LAKES BY WEDNESDAY
EVENING. PRECIPITATION WILL BEGIN AROUND DAYBREAK ACROSS THE
WEST AND SOUTHWEST AS SNOW…SPREADING QUICKLY EASTWARD AND
NORTHWARD THROUGHOUT THE MORNING AND EARLY AFTERNOON. A LAYER OF
WARMER AIR ALOFT WILL CAUSE THE SNOW TO MIX WITH SLEET AND
FREEZING RAIN SOUTH OF ROUTE 22 AND WEST OF INTERSTATE 99…WHILE
A PERIOD OF SNOW AND SLEET CHANGES TO PLAIN RAIN BY AFTERNOON
ACROSS THE LOWER SUSQUEHANNA RIVER VALLEY. FURTHER NORTH…SNOW
OVER THE CENTRAL MOUNTAINS WILL MIX WITH AND CHANGE TO SLEET BY
AFTERNOON AND THEN MIX WITH OR CHANGE TO FREEZING RAIN BEFORE
TAPERING TO DRIZZLE OR FREEZING DRIZZLE BY MID AFTERNOON. ACROSS
THE FAR NORTH…SNOW WILL PREDOMINATE BUT WILL MIX WITH SLEET
DURING THE AFTERNOON. OVERALL…MOST PLACES WILL SEE 1-2 INCHES
EXCEPT FOR THE LOWER SUSQ. RIVER VALLEY WHICH WILL SEE LESS THAN
AN INCH OF SNOW BEFORE THE QUICK CHANGEOVER TO SLEET AND THEN RAIN.
FOR THE ABOVE REASONS HAVE ISSUED WINTER WEATHER ADVISORIES FOR
ALL BUT THE LOWER LOWER SUSQUEHANNA RIVER VALLEY FROM 10Z WED
THROUGH 06Z THU. IF FREEZING RAIN BECOMES MORE LIKELY ACROSS THE
LOWER SUSQ…THE ADVISORY CAN BE EXPANDED TO INCLUDE THEM.