Alert archive / Pennsylvania / Winter Storm Watches in 2011

Winter Storm Watch 8, NWS Philadelphia/Mount Holly

October 27, 2011Morris County, Sussex County, Warren County, New Jersey; 5 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this winter storm watch at Oct 27, 2011, 3:15 PM EDT for Morris County, Sussex County, Warren County, New Jersey; 5 counties in Pennsylvania. It took effect at Oct 29, 2011, 8:00 AM EDT. It was in force for .

The area

The counties it named.

The facts

Issued
Oct 27, 2011, 3:15 PM EDT (19:15 UTC)
In effect from
Oct 29, 2011, 8:00 AM EDT
Expired
Oct 28, 2011, 3:52 PM EDT
In force
Issued by
NWS Philadelphia/Mount Holly

Counties Morris 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), 122 km from the middle of the area, began a volume at 19:17 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.3 hours before the alert went out and 167 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, Phillips Aaf/Abe, MD at 12:00Z on 2011-10-27Temperature 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, Phillips Aaf/Abe, MD at 12:00Z on 2011-10-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 132 square meters per square second.1939587897117Sfc1 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
842 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
132 m²/s²
0-3 km storm-relative helicity
149 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.

844 
WWUS41 KPHI 271915
WSWPHI

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
315 PM EDT THU OCT 27 2011

...WINTRY WEATHER IS EXPECTED SATURDAY INTO SATURDAY EVENING...

.AN EARLY SEASON COASTAL STORM WILL CAUSE POTENTIALLY HEAVY SNOW
ACCUMULATIONS.

NJZ001-007-008-PAZ054-055-060>062-280900-
/O.NEW.KPHI.WS.A.0008.111029T1200Z-111030T0400Z/
SUSSEX-WARREN-MORRIS-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
JIM THORPE...STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...
EASTON
315 PM EDT THU OCT 27 2011

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER
STORM WATCH...WHICH IS IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING. 

* LOCATIONS...THE SOUTHERN POCONOS...THE LEHIGH VALLEY...BERKS
  COUNTY...AND NORTHWESTERN NEW JERSEY.

* HAZARD TYPES...HEAVY SNOW.

* ACCUMULATIONS...POTENTIALLY 4 TO 6 INCHES OF SNOW...WITH THE
  HIGHEST AMOUNTS OVER THE HIGHER ELEVATIONS.

* TIMING...SATURDAY MORNING INTO SATURDAY EVENING.

* IMPACTS...IMPAIRED TRAVEL...AND ISOLATED DOWNED TREES AND LIMBS
  WHICH MAY CAUSE LOCALIZED POWER OUTAGES.

* WINDS...NORTH 10 TO 15 MPH WITH GUSTS UP TO 20 MPH.

* TEMPERATURES...IN THE MID 30S.

* VISIBILITIES...1/2 TO 1 MILE AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$
3 follow-up statements
867 
WWUS41 KPHI 280745
WSWPHI

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
345 AM EDT FRI OCT 28 2011

...WINTRY WEATHER IS EXPECTED SATURDAY INTO SATURDAY EVENING...

.AN EARLY SEASON COASTAL STORM WILL CAUSE POTENTIALLY HEAVY SNOW
ACCUMULATIONS.

NJZ001-007-008-PAZ054-055-060>062-281600-
/O.CON.KPHI.WS.A.0008.111029T1200Z-111030T0400Z/
SUSSEX-WARREN-MORRIS-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
JIM THORPE...STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...
EASTON
345 AM EDT FRI OCT 28 2011

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

* LOCATIONS...THE SOUTHERN POCONOS...THE LEHIGH VALLEY...BERKS 
  COUNTY...AND NORTHWESTERN NEW JERSEY. 

* HAZARD TYPES...HEAVY SNOW.

* ACCUMULATIONS...6 TO 10 INCHES OF SNOW.

* TIMING...SATURDAY MORNING INTO SATURDAY EVENING.

* IMPACTS...IMPAIRED TRAVEL. TREES WHICH STILL HAVE LEAVES ON THEM
  WILL BECOME LOADED WITH WET SNOW AND HAVE LIMBS BREAK OFF THEM.
  POWER OUTAGES WILL RESULT. PREPARE FOR LOSS OF POWER.

* WINDS...NORTH 10 TO 15 MPH WITH GUSTS UP TO 20 MPH.

* TEMPERATURES...IN THE LOW TO MID 30S.

* VISIBILITIES...1/2 TO 1 MILE AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$
322 
WWUS41 KPHI 281509
WSWPHI

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1109 AM EDT FRI OCT 28 2011

...WINTRY WEATHER IS EXPECTED SATURDAY INTO SATURDAY EVENING...

.AN EARLY SEASON COASTAL STORM WILL CAUSE POTENTIALLY HEAVY SNOW
ACCUMULATIONS.

NJZ001-007-008-PAZ054-055-060>062-282315-
/O.CON.KPHI.WS.A.0008.111029T1200Z-111030T0400Z/
SUSSEX-WARREN-MORRIS-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
JIM THORPE...STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...
EASTON
1109 AM EDT FRI OCT 28 2011

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

* LOCATIONS...THE SOUTHERN POCONOS...THE LEHIGH VALLEY...BERKS 
  COUNTY...AND NORTHWESTERN NEW JERSEY. 

* HAZARD TYPES...HEAVY SNOW.

* ACCUMULATIONS...6 TO 10 INCHES OF SNOW. HIGHER AMOUNTS POSSIBLE
  ON GRASSY SURFACES.

* TIMING...SATURDAY MORNING INTO SATURDAY EVENING.

* IMPACTS...IMPAIRED TRAVEL. TREES WHICH STILL HAVE LEAVES ON 
  THEM WILL BECOME LOADED WITH WET SNOW AND HAVE LIMBS BREAK OFF 
  THEM. POWER OUTAGES WILL RESULT. PREPARE FOR LOSS OF POWER. 

* WINDS...NORTH 10 TO 15 MPH WITH GUSTS UP TO 20 MPH.

* TEMPERATURES...IN THE LOW TO MID 30S.

* VISIBILITIES...1/2 TO 1 MILE AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$

KRUZDLO
855 
WWUS41 KPHI 281952
WSWPHI

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
352 PM EDT FRI OCT 28 2011

...AN EARLY SEASON WINTER STORM WILL SIGNIFICANTLY IMPACT THE 
REGION...

.AN AREA OF LOW PRESSURE DEVELOPING NEAR THE SOUTHEAST UNITED
STATES COAST TONIGHT WILL INTENSIFY AND TRACK UP THE EAST COAST
SATURDAY. THIS WILL BRING A SWATCH OF HEAVY WET, AND POTENTIALLY
DAMAGING, SNOW TO A DECENT PORTION OF THE REGION ON SATURDAY.
THE STORM IS EXPECTED TO END AND MOVE AWAY FROM OUR AREA SATURDAY
NIGHT.

THE HIGHER ACCUMULATIONS OF HEAVY WET SNOW SHOULD BE ACROSS THE
HIGHER ELEVATIONS AND ON NON-PAVED SURFACES. IF THE SNOW FALLS
AT A HEAVY RATE, THIS WILL TEND TO INCREASE THE EFFICIENCY OF IT
STICKING TO ALL SURFACES.

NJZ001-PAZ054-055-291000-
/O.UPG.KPHI.WS.A.0008.111029T1200Z-111030T0400Z/
/O.NEW.KPHI.WS.W.0010.111029T0600Z-111030T0600Z/
SUSSEX-CARBON-MONROE-
INCLUDING THE CITIES OF...NEWTON...JIM THORPE...STROUDSBURG
352 PM EDT FRI OCT 28 2011

...WINTER STORM WARNING IN EFFECT FROM 2 AM SATURDAY TO 2 AM EDT
SUNDAY...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER
STORM WARNING FOR HEAVY WET SNOW...WHICH IS IN EFFECT FROM 2 AM
SATURDAY TO 2 AM EDT SUNDAY. THE WINTER STORM WATCH IS NO LONGER
IN EFFECT.

* ACCUMULATIONS...8 TO 14 INCHES. THE HIGHEST AMOUNTS ESPECIALLY
  ACROSS THE HIGHER ELEVATIONS AND ON NON-PAVED SURFACES.

* TIMING...SNOW WILL OVERSPREAD THE REGION AFTER MIDNIGHT TONIGHT AND
  CONTINUE DURING SATURDAY. THE SNOW COULD MIX WITH OR EVEN START
  AS LIGHT RAIN BRIEFLY AT THE ONSET.

* IMPACTS...HAZARDOUS TRAVEL DEVELOPING, AND THE HEAVY WET SNOW
  WILL LIKELY WEIGH DOWN TREES WHICH STILL HAVE SOME LEAVES ON
  THEM. THIS WILL LEAD TO DOWNED TREES AND POWER OUTAGES. THE WET
  SNOW MAY FALL HEAVY AT TIMES DURING THE HEIGHT OF THE STORM,
  LOCALLY INCREASING THE ACCUMULATION RATE.

* WINDS...NORTH 10 TO 20 MPH WITH GUSTS UP TO 30 MPH.

* TEMPERATURES...IN THE LOWER TO MID 30S, BUT THEN DROPPING INTO
  THE UPPER 20S SATURDAY NIGHT.

* VISIBILITIES...REDUCED TO WELL UNDER A MILE AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

NJZ007-008-PAZ060>062-291000-
/O.UPG.KPHI.WS.A.0008.111029T1200Z-111030T0400Z/
/O.NEW.KPHI.WS.W.0010.111029T0600Z-111030T0600Z/
WARREN-MORRIS-BERKS-LEHIGH-NORTHAMPTON-
INCLUDING THE CITIES OF...WASHINGTON...MORRISTOWN...READING...
ALLENTOWN...BETHLEHEM...EASTON
352 PM EDT FRI OCT 28 2011

...WINTER STORM WARNING IN EFFECT FROM 2 AM SATURDAY TO 2 AM EDT
SUNDAY...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER
STORM WARNING FOR HEAVY WET SNOW...WHICH IS IN EFFECT FROM 2 AM
SATURDAY TO 2 AM EDT SUNDAY. THE WINTER STORM WATCH IS NO LONGER
IN EFFECT.

* ACCUMULATIONS...6 TO 10 INCHES. THE HIGHEST AMOUNTS ESPECIALLY
  ACROSS THE HIGHER ELEVATIONS AND ON NON-PAVED SURFACES. 

* TIMING...RAIN AND SNOW WILL OVERSPREAD THE REGION AFTER
  MIDNIGHT TONIGHT, THEN CHANGE TO ALL SNOW DURING SATURDAY MORNING.

* IMPACTS...HAZARDOUS TRAVEL DEVELOPING, AND THE HEAVY WET SNOW
  WILL LIKELY WEIGH DOWN TREES WHICH STILL HAVE LEAVES ON THEM.
  THIS WILL LEAD TO DOWNED TREES AND POWER OUTAGES. THE WET SNOW
  MAY FALL HEAVY AT TIMES DURING THE HEIGHT OF THE STORM, LOCALLY
  INCREASING THE ACCUMULATION RATE.

* WINDS...NORTH 10 TO 20 MPH WITH GUSTS UP TO 30 MPH.

* TEMPERATURES...IN THE MID TO UPPER 30S, THEN DROPPING TO NEAR
  FREEZING SATURDAY NIGHT.

* VISIBILITIES...REDUCED TO WELL UNDER A MILE AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

NJZ009-010-PAZ067>069-291000-
/O.NEW.KPHI.WS.W.0010.111029T1200Z-111030T0600Z/
HUNTERDON-SOMERSET-CHESTER-MONTGOMERY-BUCKS-
INCLUDING THE CITIES OF...FLEMINGTON...SOMERVILLE...
WEST CHESTER...NORRISTOWN...DOYLESTOWN
352 PM EDT FRI OCT 28 2011

...WINTER STORM WARNING IN EFFECT FROM 8 AM SATURDAY TO 2 AM EDT
SUNDAY...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER
STORM WARNING FOR HEAVY WET SNOW...WHICH IS IN EFFECT FROM 8 AM
SATURDAY TO 2 AM EDT SUNDAY.

* ACCUMULATIONS...2 TO 6 INCHES. THE HIGHEST AMOUNTS MAINLY ACROSS
  THE HIGHER ELEVATIONS AND ON NON-PAVED SURFACES.

* TIMING...RAIN WILL DEVELOP AFTER MIDNIGHT TONIGHT, THEN MIX WITH
  AND CHANGE TO WET SNOW DURING SATURDAY MORNING.

* IMPACTS...HAZARDOUS TRAVEL DEVELOPING, AND THE HEAVY WET SNOW
  WILL LIKELY WEIGH DOWN TREES WHICH STILL HAVE LEAVES ON THEM.
  THIS WILL LEAD TO SOME DOWNED TREES AND POWER OUTAGES. THE WET
  SNOW MAY FALL HEAVY AT TIMES DURING THE HEIGHT OF THE STORM,
  LOCALLY INCREASING THE ACCUMULATION RATE.

* WINDS...NORTH 15 TO 25 MPH WITH GUSTS UP TO 30 MPH.

* TEMPERATURES...IN THE UPPER 30S TO LOWER 40S, BUT THEN DROPPING
  TO NEAR FREEZING SATURDAY NIGHT.

* VISIBILITIES...REDUCED TO WELL UNDER A MILE AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE
EXPECTED. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL
VERY HAZARDOUS.

&&

$$

DEZ001-MDZ008-NJZ012-013-015>019-PAZ070-071-291000-
/O.NEW.KPHI.WW.Y.0022.111029T1600Z-111030T0600Z/
NEW CASTLE-CECIL-MIDDLESEX-WESTERN MONMOUTH-MERCER-SALEM-
GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-DELAWARE-PHILADELPHIA-
INCLUDING THE CITIES OF...WILMINGTON...ELKTON...NEW BRUNSWICK...
FREEHOLD...TRENTON...PENNSVILLE...GLASSBORO...CAMDEN...
CHERRY HILL...MOORESTOWN...MOUNT HOLLY...MEDIA...PHILADELPHIA
352 PM EDT FRI OCT 28 2011

...WINTER WEATHER ADVISORY IN EFFECT FROM NOON SATURDAY TO 2 AM
EDT SUNDAY...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER
WEATHER ADVISORY FOR RAIN CHANGING TO HEAVY WET SNOW...WHICH IS
IN EFFECT FROM NOON SATURDAY TO 2 AM EDT SUNDAY.

* ACCUMULATIONS...1 TO 2 INCHES. THE GREATEST ACCUMULATIONS SHOULD
  BE ON NON-PAVED SURFACES.

* TIMING...RAIN WILL OVERSPREAD THE REGION AFTER MIDNIGHT TONIGHT,
  THEN MIX WITH WET SNOW AROUND MIDDAY BEFORE CHANGING TO WET SNOW
  DURING THE AFTERNOON.

* IMPACTS...AREAS OF SLIPPERY TRAVEL DEVELOPING, AND THE HEAVY WET
  SNOW WILL WEIGH DOWN TREE LIMBS WHICH STILL HAVE LEAVES ON THEM.
  THIS WILL POTENTIALLY LEAD TO SOME DOWNED TREE LIMBS AND POWER
  OUTAGES. THERE COULD BE A BURST OF HEAVY WET SNOW DURING THE
  HEIGHT OF THE STORM, LOCALLY INCREASING THE ACCUMULATION RATE
  FOR A TIME SATURDAY EVENING.

* WINDS...NORTH 15 TO 25 MPH WITH GUSTS UP TO 35 MPH.

* TEMPERATURES...AROUND 40, BUT THEN FALLING INTO THE LOWER 30S
  SATURDAY NIGHT.

* VISIBILITIES...REDUCED TO WELL UNDER A MILE AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

GORSE

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 27, 4:26 AM EDTSmall Craft AdvisoryPHI32 hr
Oct 27, 12:36 PM EDTCoastal Flood AdvisoryPHIBurlington, Camden, Gloucester4 hr
Oct 27, 12:36 PM EDTCoastal Flood AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 4 more28 hr
Oct 27, 2:30 PM EDTFreeze WarningPHIHunterdon, Somerset18 hr
Oct 27, 4:22 AM EDTFreeze WatchPHIBerks10 hr

Nearby

Winter Storm Watches in Pennsylvania, 2011Winter Storm Watches in New Jersey, 2011Every winter storm watch in 2011

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.