Alert archive / New Jersey / Winter Storm Watches in 2009

Winter Storm Watch 2, NWS Philadelphia/Mount Holly

January 9, 20095 counties in Pennsylvania; 7 counties in New Jersey

NWS Philadelphia/Mount Holly issued this winter storm watch at Jan 9, 2009, 4:19 AM EST for 5 counties in Pennsylvania; 7 counties in New Jersey. It took effect at Jan 10, 2009, 10:00 AM EST. It was in force for .

The area

The counties it named.

The facts

Issued
Jan 9, 2009, 4:19 AM EST (09:19 UTC)
In effect from
Jan 10, 2009, 10:00 AM EST
Expired
Jan 9, 2009, 3:27 PM EST
In force
Issued by
NWS Philadelphia/Mount Holly

Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 101 km from the middle of the area, began a volume at 09:23 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 9.3 hours before the alert went out and 186 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Brookhaven, NY at 00:00Z on 2009-01-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2009-01-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 110 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1287 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
110 m²/s²
0-3 km storm-relative helicity
141 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS41 KPHI 090919
WSWPHI

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
419 AM EST FRI JAN 9 2009

...ANOTHER STORM TO AFFECT A GOOD PART OF THE REGION SATURDAY 
INTO SUNDAY...

.COLD HIGH PRESSURE WILL BUILD OVER THE REGION TODAY AND MOVE
OFFSHORE SATURDAY MORNING. LOW PRESSURE, OVER TEXAS, WILL TRACK
NORTHEAST TO THE OHIO VALLEY BY SATURDAY MORNING SPREADING WINTRY
PRECIPITATION TO THE MID ATLANTIC. THIS STORM MAY BRING A
SIGNIFICANT SNOWFALL TO THE AREA ESPECIALLY FROM THE I-95 CORRIDOR
AND NORTH SATURDAY INTO SATURDAY NIGHT. THE STORM WILL EXIT THE
REGION SUNDAY MORNING LEAVING BEHIND COLD BLUSTERY AND ICY
CONDITIONS FOR SUNDAY.


NJZ001-007>010-012-015-PAZ054-055-060>062-067>069-091930-
/O.NEW.KPHI.WS.A.0002.090110T1500Z-090111T1500Z/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-MERCER-CARBON-
MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...TRENTON...JIM THORPE...
STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON...
WEST CHESTER...NORRISTOWN...DOYLESTOWN
419 AM EST FRI JAN 9 2009

...WINTER STORM WATCH IN EFFECT FROM SATURDAY MORNING THROUGH
SUNDAY MORNING...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER STORM
WATCH...WHICH IS IN EFFECT FROM SATURDAY MORNING THROUGH SUNDAY MORNING.
THE WINTER STORM WATCH IS IN EFFECT FOR THE PENNSYLVANIA COUNTIES OF
CARBON...MONROE...BERKS...LEHIGH...NORTHAMPTON...CHESTER...MONTGOMERY
AND BUCKS. THE WATCH ALSO INCLUDES THE NEW JERSEY COUNTIES OF SUSSEX
...WARREN...MORRIS...HUNTERDON...SOMERSET...MERCER AND MIDDLESEX.

THE SNOW IS EXPECTED TO BEGIN EARLY SATURDAY MORNING THEN SPREAD
EAST WHILE BEGINNING TO ACCUMULATE IN THE AFTERNOON HOURS. BY THE
END OF THE STORM ON SUNDAY MORNING, THERE WILL BE SOME MIXED SLEET
FALLING IN THE WATCH AREA WHILE MAINLY RAIN AND SOME WET SNOW WILL
FALL OVER THE SOUTHERN AREAS.

SNOWFALL ACCUMULATIONS COULD RANGE BETWEEN FOUR AND SEVEN INCHES
ACROSS THE WATCH AREA WITH THE HIGHER AMOUNTS FROM THE LEHIGH
VALLEY TO THE POCONOS AND NORTHWEST NEW JERSEY. 

THESE AMOUNTS COULD BE LESS DEPENDING UPON WHEN THE MIX WITH SLEET
OCCURS. IN ANY EVENT CONDITIONS ARE GOING TO TURN HAZARDOUS LATE
SATURDAY INTO SUNDAY MORNING. 

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.

$$


EBERWINE/
2 follow-up statements
000 
WWUS41 KPHI 091510
WSWPHI

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1010 AM EST FRI JAN 9 2009

...ANOTHER STORM TO AFFECT A GOOD PART OF THE REGION SATURDAY
INTO SUNDAY...

.COLD HIGH PRESSURE OVER THE REGION TODAY WILL MOVE OFFSHORE LATER
TONIGHT. MEANWHILE LOW PRESSURE OVER THE SOUTHERN PLAINS WILL
TRACK NORTHEAST TO THE OHIO VALLEY BY SATURDAY MORNING...SPREADING
WINTRY PRECIPITATION TO THE MID ATLANTIC. THIS STORM MAY BRING A
SIGNIFICANT SNOWFALL TO THE AREA ESPECIALLY FROM THE I-95 CORRIDOR
AND NORTH SATURDAY INTO SATURDAY NIGHT. THE STORM WILL EXIT THE
REGION SUNDAY MORNING LEAVING BEHIND COLD...BLUSTERY AND ICY
CONDITIONS FOR SUNDAY.

NJZ001-007>010-012-015-PAZ054-055-060>062-067>069-092300-
/O.CON.KPHI.WS.A.0002.090110T1500Z-090111T1500Z/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-MERCER-CARBON-
MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...TRENTON...JIM THORPE...
STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON...
WEST CHESTER...NORRISTOWN...DOYLESTOWN
1010 AM EST FRI JAN 9 2009

...WINTER STORM WATCH REMAINS IN EFFECT FROM SATURDAY MORNING
THROUGH SUNDAY MORNING...

A WINTER STORM WATCH REMAINS IN EFFECT FROM SATURDAY MORNING
THROUGH SUNDAY MORNING. 

SNOW IS EXPECTED TO BEGIN SATURDAY MORNING OVER PENNSYLVANIA AND
THEN SPREAD EAST WHILE BEGINNING TO ACCUMULATE IN THE AFTERNOON
HOURS. BY THE END OF THE STORM EARLY SUNDAY MORNING...THERE WILL
BE SOME MIXED SLEET FALLING IN THE WATCH AREA WHILE MAINLY RAIN
AND SOME WET SNOW WILL FALL OVER THE SOUTHERN AREAS.

SNOWFALL ACCUMULATIONS COULD RANGE BETWEEN FOUR AND SEVEN INCHES
ACROSS THE WATCH AREA WITH THE HIGHER AMOUNTS FROM THE LEHIGH
VALLEY TO THE POCONOS AND NORTHWEST NEW JERSEY.

THESE AMOUNTS COULD BE LESS DEPENDING UPON WHEN THE MIX WITH
SLEET OCCURS. IN ANY EVENT CONDITIONS ARE GOING TO TURN HAZARDOUS
LATE SATURDAY INTO SUNDAY MORNING.

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.

$$

AMC
000 
WWUS41 KPHI 092027
WSWPHI

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
327 PM EST FRI JAN 9 2009

...ANOTHER STORM TO AFFECT A GOOD PART OF THE REGION SATURDAY
INTO SUNDAY...

LOW PRESSURE OVER THE SOUTHERN PLAINS WILL TRACK NORTHEAST TO THE
OHIO VALLEY BY SATURDAY MORNING... SPREADING WINTRY PRECIPITATION
TO THE MID ATLANTIC. THIS STORM SHOULD BRING A SIGNIFICANT SNOWFALL TO
THE AREA ESPECIALLY NORTHWEST OF THE I-95 CORRIDOR AND NORTH SATURDAY
INTO SATURDAY NIGHT. THE STORM WILL EXIT THE REGION SUNDAY MORNING
LEAVING BEHIND COLD...BLUSTERY AND ICY CONDITIONS FOR SUNDAY.

NJZ001-007-008-PAZ054-055-060>062-100500-
/O.UPG.KPHI.WS.A.0002.090110T1500Z-090111T1500Z/
/O.NEW.KPHI.WS.W.0002.090110T1200Z-090111T1200Z/
SUSSEX-WARREN-MORRIS-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
JIM THORPE...STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...
EASTON
327 PM EST FRI JAN 9 2009

...WINTER STORM WARNING IN EFFECT FROM 7 AM SATURDAY TO 7 AM EST
SUNDAY...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER
STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 7 AM
SATURDAY TO 7 AM EST SUNDAY.  

SOME SPOTTY LIGHT SNOW MIGHT ARRIVE BEFORE SUNRISE ON SATURDAY IN 
THE POCONOS AND LEHIGH VALLEY WITH A STEADIER SNOW SPREADING EAST 
ACROSS THE ENTIRE AREA DURING SATURDAY MORNING. THE HEAVIEST SNOW IS 
EXPECTED TO OCCUR BETWEEN NOON AND MIDNIGHT ON SATURDAY BEFORE IT 
TAPERS OFF LATER SATURDAY NIGHT.

FINAL SNOWFALL ACCUMULATIONS SHOULD AVERAGE BETWEEN 6 AND 10 INCHES 
WITH THE LARGEST ACCUMULATIONS ACROSS THE HIGHER TERRAIN OF THE  
POCONOS AND NORTHWEST NEW JERSEY.

PLEASE USE THE REST OF TODAY TO MAKE ANY NECESSARY PREPARATIONS. 
PLEASE BE ADVISED THAT DRIVING WILL BECOME MORE DIFFICULT AND 
HAZARDOUS AS SATURDAY CONTINUES. IF YOU MUST TRAVEL, PLEASE GIVE 
YOURSELF EXTRA TIME TO REACH YOUR DESTINATION, LEAVE PLENTY OF SPACE 
BETWEEN YOURSELF AND THE VEHICLES AROUND, HAVE ENOUGH GAS IN YOUR 
VEHICLES  YOU AND CARRY EXTRA BLANKETS WITH YOU.

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE
EXPECTED OR OCCURRING. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR
IMPOSSIBLE.

$$

NJZ009-010-012-015-PAZ068-069-100500-
/O.UPG.KPHI.WS.A.0002.090110T1500Z-090111T1500Z/
/O.NEW.KPHI.WS.W.0002.090110T1200Z-090111T1200Z/
HUNTERDON-SOMERSET-MIDDLESEX-MERCER-MONTGOMERY-BUCKS-
INCLUDING THE CITIES OF...FLEMINGTON...SOMERVILLE...
NEW BRUNSWICK...TRENTON...NORRISTOWN...DOYLESTOWN
327 PM EST FRI JAN 9 2009

...WINTER STORM WARNING IN EFFECT FROM 7 AM SATURDAY TO 7 AM EST
SUNDAY...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER
STORM WARNING FOR A WINTRY MIX OF SNOW...SLEET AND FREEZING RAIN...
WHICH IS IN EFFECT FROM 7 AM SATURDAY TO 7 AM EST SUNDAY. THE
WINTER STORM WATCH IS NO LONGER IN EFFECT.

LIGHT SNOW COULD ARRIVE AS EARLY AS SATURDAY MORNING ACROSS THE 
REGION AND BECOME STEADIER AND HEAVIER DURING THE AFTERNOON. SOME 
SLEET AND RAIN MIGHT START MIXING IN WITH THE SNOW TOWARD EVENING, 
ESPECIALLY TOWARD PHILADELPHIA AND TRENTON. A WINTRY MIX OF SLEET, 
FREEZING RAIN AND SNOW SHOULD OCCUR DURING THE EVENING BEFORE 
PRECIPITATION GOES BACK TO SNOW BEFORE ENDING OVERNIGHT. 

FINAL SNOW AND SLEET ACCUMULATIONS SHOULD AVERAGE BETWEEN 4 AND 7 
INCHES WITH THE HIGHEST AMOUNTS OVER SOME OF THE HIGHER TERRAIN 
LOCATIONS IN THE REGION. THERE IS SOME UNCERTAINTY AS TO HOW QUICKLY 
OR HOW MUCH A CHANGEOVER WILL OCCUR AND AMOUNTS MIGHT HAVE TO  
BE ADJUSTED WITH LATER FORECASTS. FOR MOST AREAS THIS SHOULD BE A 
PLOWABLE SNOW.

PLEASE USE THE REST OF TODAY TO MAKE ANY NECESSARY PREPARATIONS. 
PLEASE BE ADVISED THAT DRIVING WILL BECOME MORE DIFFICULT AND 
HAZARDOUS AS SATURDAY CONTINUES. IF YOU MUST TRAVEL, PLEASE GIVE 
YOURSELF EXTRA TIME TO REACH YOUR DESTINATION AND LEAVE PLENTY OF 
SPACE BETWEEN YOURSELF AND THE VEHICLES AROUND. HEAVIER SNOW SHOULD 
FALL IN PLACES TO THE NORTH.

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW...
SLEET...AND ICE ARE EXPECTED OR OCCURRING. THIS WILL MAKE TRAVEL
VERY HAZARDOUS.

$$

PAZ067-100500-
/O.UPG.KPHI.WS.A.0002.090110T1500Z-090111T1500Z/
/O.NEW.KPHI.WW.Y.0002.090110T1200Z-090111T0500Z/
CHESTER-
INCLUDING THE CITY OF...WEST CHESTER
327 PM EST FRI JAN 9 2009

...WINTER WEATHER ADVISORY IN EFFECT FROM 7 AM SATURDAY TO
MIDNIGHT EST SATURDAY NIGHT...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER
WEATHER ADVISORY FOR A WINTRY MIX OF PRECIPITATION WHICH IS IN
EFFECT FROM 7 AM SATURDAY TO MIDNIGHT EST SATURDAY NIGHT.  

LIGHT SNOW COULD ARRIVE AS EARLY AS SATURDAY MORNING ACROSS THE 
COUNTY AND BECOME STEADIER AND HEAVIER DURING THE AFTERNOON. SOME
SLEET AND RAIN SHOULD START MIXING IN WITH THE SNOW TOWARD
EVENING, ESPECIALLY TOWARD PHILADELPHIA. A WINTRY MIX OF SLEET,
FREEZING RAIN AND SNOW SHOULD OCCUR DURING THE EVENING BEFORE
PRECIPITATION GOES BACK TO SNOW BEFORE ENDING OVERNIGHT.

FINAL SNOW AND SLEET ACCUMULATIONS SHOULD AVERAGE BETWEEN 3 AND 6 
INCHES WITH THE HIGHEST AMOUNTS OVER SOME OF THE HIGHER TERRAIN 
LOCATIONS IN THE WESTERN PART OF THE COUNTY. THERE IS SOME UNCERTAINTY
AS TO HOW QUICKLY OR HOW MUCH A CHANGEOVER WILL OCCUR AND AMOUNTS
MIGHT HAVE TO BE ADJUSTED WITH LATER FORECASTS. FOR MOST AREAS
THIS SHOULD BE A PLOWABLE SNOW.

PLEASE USE THE REST OF TODAY TO MAKE ANY NECESSARY PREPARATIONS. 
PLEASE BE ADVISED THAT DRIVING WILL BECOME MORE DIFFICULT AND 
HAZARDOUS AS SATURDAY CONTINUES. IF YOU MUST TRAVEL, PLEASE GIVE 
YOURSELF EXTRA TIME TO REACH YOUR DESTINATION AND LEAVE PLENTY OF 
SPACE BETWEEN YOURSELF AND THE VEHICLES AROUND. HEAVIER SNOW SHOULD 
FALL IN PLACES TO THE NORTH.

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

$$

NJZ013-014-100500-
/O.NEW.KPHI.WW.Y.0002.090110T1200Z-090111T0500Z/
WESTERN MONMOUTH-EASTERN MONMOUTH-
INCLUDING THE CITIES OF...FREEHOLD...SANDY HOOK
327 PM EST FRI JAN 9 2009

...WINTER WEATHER ADVISORY IN EFFECT FROM 7 AM SATURDAY TO
MIDNIGHT EST SATURDAY NIGHT...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER
WEATHER ADVISORY FOR A WINTRY MIX OF PRECIPITATION...WHICH IS IN
EFFECT FROM 7 AM SATURDAY TO MIDNIGHT EST SATURDAY NIGHT.

LIGHT SNOW COULD ARRIVE BEFORE NOON IN THE COUNTY AND BECOME 
STEADIER AND HEAVIER DURING THE AFTERNOON. SLEET, FREEZING RAIN AND  
AND RAIN SHOULD MIX IN WITH THE SNOW TOWARD EVENING, ESPECIALLY 
CLOSER TO THE COAST. A WINTRY MIX OF RAIN, SLEET, FREEZING RAIN AND 
SNOW SHOULD OCCUR DURING THE EVENING BEFORE PRECIPITATION CHANGES 
BACK TO SNOW BEFORE ENDING. 

FINAL SNOW AND SLEET ACCUMULATIONS SHOULD AVERAGE BETWEEN 2 AND 5 
INCHES WITH THE HIGHEST AMOUNTS WELL INLAND. THERE IS SOME 
UNCERTAINTY AS TO HOW QUICKLY OR HOW MUCH A CHANGEOVER WILL OCCUR 
AND AMOUNTS MIGHT HAVE TO BE ADJUSTED WITH LATER FORECASTS. FOR MOST 
AREAS THIS SHOULD BE A PLOWABLE SNOW.

PLEASE USE THE REST OF TODAY TO MAKE ANY NECESSARY PREPARATIONS. 
PLEASE BE ADVISED THAT DRIVING WILL BECOME MORE DIFFICULT AND 
HAZARDOUS AS SATURDAY CONTINUES. IF YOU MUST TRAVEL, PLEASE GIVE 
YOURSELF EXTRA TIME TO REACH YOUR DESTINATION AND LEAVE PLENTY OF 
SPACE BETWEEN YOURSELF AND THE VEHICLES AROUND. HEAVIER SNOW SHOULD 
FALL IN PLACES TO THE NORTHWEST.

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

$$

DEZ001-MDZ008-NJZ016>020-PAZ070-071-100500-
/O.NEW.KPHI.WW.Y.0002.090110T1200Z-090111T0500Z/
NEW CASTLE-CECIL-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-
OCEAN-DELAWARE-PHILADELPHIA-
INCLUDING THE CITIES OF...WILMINGTON...ELKTON...PENNSVILLE...
GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY...
JACKSON...MEDIA...PHILADELPHIA
327 PM EST FRI JAN 9 2009

...WINTER WEATHER ADVISORY IN EFFECT FROM 7 AM SATURDAY TO
MIDNIGHT EST SATURDAY NIGHT...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER
WEATHER ADVISORY FOR A WINTRY MIX OF PRECIPITATION...WHICH IS IN
EFFECT FROM 7 AM SATURDAY TO MIDNIGHT EST SATURDAY NIGHT.

LIGHT SNOW COULD ARRIVE DURING SATURDAY MORNING. AS WARMER AIR MOVES 
IN ALOFT THE SNOW WILL MIX WITH RAIN AND SLEET DURING THE AFTERNOON 
AND PROBABLY CHANGE OVER TO PLAIN RAIN DURING THE EVENING. THERE 
MIGHT BE SOME POCKETS OF FREEZING RAIN IN HIGHER ELEVATION LOCATIONS 
AROUND PHILADELPHIA AND THE UPPER DELMARVA. PRECIPITATION SHOULD 
TRANSITION BACK TO FREEZING RAIN AND SLEET AND THEN SNOW BEFORE IT 
ENDS OVERNIGHT ON SATURDAY.

FINAL SNOW AND SLEET ACCUMULATIONS SHOULD AVERAGE BETWEEN 1 AND 3 
INCHES. THERE IS SOME UNCERTAINTY AS TO HOW QUICKLY BOTH CHANGEOVERS 
WILL OCCUR AND AMOUNTS MIGHT HAVE TO BE ADJUSTED WITH LATER 
FORECASTS.  
 
PLEASE BE PREPARED FOR MORE DIFFICULT AND HAZARDOUS DRIVING 
CONDITIONS AS SATURDAY CONTINUES. THIS WOULD ESPECIALLY BE TRUE FOR 
SATURDAY NIGHT IF FREEZING RAIN OCCURS. HEAVIER SNOW SHOULD FALL IN 
PLACES FARTHER TO THE NORTHWEST.
 
A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

$$

COPE/GIGI

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 9, 3:27 PM ESTWinter Storm WarningPHIBerks, Carbon, Lehigh, Monroe, Northampton37 hr
Jan 9, 3:27 PM ESTWinter Weather AdvisoryPHIBerks, Delaware, Lehigh, Northampton, Philadelphia37 hr
Jan 9, 3:49 AM ESTLow Water AdvisoryPHI10 hr

Nearby

Winter Storm Watches in New Jersey, 2009Winter Storm Watches in Pennsylvania, 2009Every winter storm watch in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.