Alert archive / Pennsylvania / Winter Storm Watches in 2011
Winter Storm Watch 9, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this winter storm watch at Dec 6, 2011, 3:10 PM EST for Carbon County, Monroe County, Pennsylvania; Sussex County, New Jersey. It took effect at Dec 7, 2011, 10:00 PM EST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 6, 2011, 3:10 PM EST (20:10 UTC)
- In effect from
- Dec 7, 2011, 10:00 PM EST
- Expired
- Dec 7, 2011, 4:12 AM EST
- In force
- Issued by
- NWS Philadelphia/Mount Holly
Counties Sussex County, NJ, Carbon County, PA, Monroe County, PA
The radar
The Philadelphia radar (KDIX), 140 km from the middle of the area, began a volume at 20:11 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, 8.2 hours before the alert went out and 189 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 522 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 199 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
444 WWUS41 KPHI 062010 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 310 PM EST TUE DEC 6 2011 NJZ001-PAZ054-055-071030- /O.NEW.KPHI.WS.A.0009.111208T0300Z-111208T1200Z/ SUSSEX-CARBON-MONROE- INCLUDING THE CITIES OF...NEWTON...JIM THORPE...STROUDSBURG 310 PM EST TUE DEC 6 2011 ...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY MORNING... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER STORM WATCH...WHICH IS IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY MORNING. * LOCATIONS...CARBON AND MONROE COUNTIES IN THE SOUTHERN POCONOS AND SUSSEX COUNTY IN NEW JERSEY. * HAZARD TYPES...HEAVY SNOW EXPECTED. * ACCUMULATIONS...3 TO 8 INCHES WITH THE GREATEST ACCUMULATIONS IN THE HIGHER TERRAIN. * TIMING...THE RAIN SHOULD START CHANGING TO SNOW OVER THE HIGHER TERRAIN IN THE POCONOS DURING WEDNESDAY EVENING AND CHANGE OVER IN ALL AREAS BY VERY EARLY THURSDAY MORNING. THE SNOW SHOULD END AROUND THE START OF THE MORNING COMMUTE ON THURSDAY. * IMPACTS...THE GREATEST COMMUTING IMPACT SHOULD OCCUR THURSDAY MORNING. BUT ANYONE DRIVING WEDNESDAY EVENING AND NIGHT COULD FACE DIFFICULT TRAVEL. SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR ARE POSSIBLE DURING THE HEIGHT OF THE STORM. * WINDS...NORTHWEST 10 TO 15 MPH WITH GUSTS UP TO 20 MPH. THE SNOW IS EXPECTED TO BE ON THE WETTER SIDE, SO BLOWING AND DRIFTING SHOULD BE LESS THAN AVERAGE. * TEMPERATURES...WILL FALL THROUGH THE 30S AND BY THURSDAY MORNING WILL BE IN THE UPPER 20S AND LOWER 30S. * VISIBILITIES...ONE QUARTER MILE OR LESS AT TIMES. THIS WILL MAKE FOR DIFFICULT TRAVEL ESPECIALLY ON HIGHER TERRAIN ROADWAYS. 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. && $$ /GIGI
1 follow-up statement
511 WWUS41 KPHI 070912 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 412 AM EST WED DEC 7 2011 PAZ054-055-071715- /O.UPG.KPHI.WS.A.0009.111208T0300Z-111208T1200Z/ /O.NEW.KPHI.WS.W.0011.111208T0100Z-111208T0900Z/ CARBON-MONROE- INCLUDING THE CITIES OF...JIM THORPE...STROUDSBURG 412 AM EST WED DEC 7 2011 ...WINTER STORM WARNING IN EFFECT FROM 8 PM THIS EVENING TO 4 AM EST THURSDAY... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER STORM WARNING FOR SNOW...WHICH IS IN EFFECT FROM 8 PM THIS EVENING TO 4 AM EST THURSDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * LOCATIONS...THE POCONOS. * HAZARD TYPES...SNOW...HEAVIEST IN THE HIGHER ELEVATIONS. * ACCUMULATIONS...4 TO 8 INCHES OF SNOW. * TIMING...RAIN WILL CHANGE TO OCCASIONALLY HEAVY WET SNOW BETWEEN 9 PM AND MIDNIGHT AND END BETWEEN 2 AM AND 4 AM. * IMPACTS...TREACHEROUS TRAVEL SHOULD DEVELOP...ESPECIALLY IN THE POCONOS AS TEMPERATURES PLUNGE INTO THE 28 TO 32 DEGREE RANGE SHORTLY AFTER THE CHANGE TO SNOW. WET SNOW MAY CAUSE SOME TREE LIMBS TO BREAK IF ACCUMULATIONS EXCEED 4 INCHES. * WINDS...NORTHWEST 15 TO 25 MPH WITH GUSTS UP TO 35 MPH. * VISIBILITIES...ONE QUARTER MILE OR LESS AT TIMES BETWEEN 10 PM AND 1 AM WITH ACCUMULATIONS OF 1 TO 2 INCHES PER HOUR FOR AN HOUR OR 2 LATE THIS EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... SLEET...AND ICE ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ NJZ001-071715- /O.UPG.KPHI.WS.A.0009.111208T0300Z-111208T1200Z/ /O.NEW.KPHI.WW.Y.0023.111208T0300Z-111208T0900Z/ SUSSEX- INCLUDING THE CITY OF...NEWTON 412 AM EST WED DEC 7 2011 ...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 4 AM EST THURSDAY... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 10 PM THIS EVENING TO 4 AM EST THURSDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * LOCATIONS...FAR NORTHWEST NEW JERSEY INCLUDING WANTAGE...VERNON AND NEWTON. * HAZARD TYPES...SNOW. * ACCUMULATIONS...3 TO 5 INCHES OF SNOW....HEAVIEST IN HIGHER ELEVATIONS. * TIMING...RAIN CHANGES TO SNOW FROM WEST TO EAST IN THE COUNTY BETWEEN 10 PM AND MIDNIGHT AND THEN ENDS BY 4 AM. * IMPACTS...TRAVEL SHOULD BECOME TREACHEROUS FOR SEVERAL HOURS AROUND MIDNIGHT. * WINDS...NORTHWEST 10 TO 15 MPH WITH GUSTS UP TO 25 MPH....BUT GUSTS TO 35 MPH NEAR HIGH POINT. * TEMPERATURES...DROP SUDDENLY IN THE UPPER 20S AND LOWER 30S... WITHIN AN HOUR OE 2 OF THE CHANGE TO SNOW. * VISIBILITIES...ONE QUARTER TO ONE HALF MILE AT TIMES WITH ACCUMULATION RATES OF 1 TO 2 INCHES PER HOUR FOR AN HOUR OR 2. * VARIABILITY...AMOUNTS MAY BE HIGHLY VARIABLE AND ARE ELEVATION DEPENDENT. FINAL STORM TOTALS IN THE COUNTY MAY RANGE BETWEEN 1 AND 6 INCHES. THIS HAS TO DO WITH THE AMOUNT OF PRECIPITATION STILL FALLING ONCE IT IS COLD ENOUGH TO SNOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. && $$ NJZ007-PAZ060>062-071715- /O.NEW.KPHI.WW.Y.0023.111208T0300Z-111208T0900Z/ WARREN-BERKS-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...WASHINGTON...READING...ALLENTOWN... BETHLEHEM...EASTON 412 AM EST WED DEC 7 2011 ...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 4 AM EST THURSDAY... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 10 PM THIS EVENING TO 4 AM EST THURSDAY. * LOCATIONS...FROM NEAR READING THROUGH THE LEHIGH VALLEY INCLUDING ALLENTOWN INTO WARREN COUNTY OF NORTHWEST NEW JERSEY. * HAZARD TYPES...SNOW. * ACCUMULATIONS...MOST LIKELY 2 TO 4 INCHES OF SNOW. HEAVIEST AMOUNTS IN THE HIGHER ELEVATIONS. * TIMING...RAIN CHANGES TO A PERIOD OF HEAVY WET SNOW BETWEEN 10 PM AND MIDNIGHT AND ENDS BETWEEN 2 AM AND 4 AM. * IMPACTS...TREACHEROUS TRAVEL SHOULD DEVELOP FOR SEVERAL HOURS AS TEMPERATURES PLUNGE TO BETWEEN 30 AND 32 DEGREES IN THE SNOW. * WINDS...NORTHWEST 15 TO 20 MPH WITH GUSTS UP TO 35 MPH. * VISIBILITIES...ONE QUARTER MILE OR LESS AT TIMES AS SNOW ACCUMULATES AT THE RATE OF AN INCH OR 2 PER HOUR FOR AN HOUR OR TWO NEAR MIDNIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 6, 3:10 PM EST | Flood Watch | PHI | Berks, Delaware, Lehigh, Northampton, Philadelphia | 36 hr |
| Dec 6, 3:50 AM EST | Gale Watch | PHI | 23 hr | |
| Dec 6, 4:08 PM EST | Small Craft Advisory | PHI | 26 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.