Alert archive / Pennsylvania / Winter Storm Warnings in 2011
Winter Storm Warning 9, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this winter storm warning at Mar 31, 2011, 3:54 AM EDT for Morris County, Sussex County, Warren County, New Jersey; 4 counties in Pennsylvania. It took effect at Mar 31, 2011, 10:00 PM EDT. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Mar 31, 2011, 3:54 AM EDT (07:54 UTC)
- In effect from
- Mar 31, 2011, 10:00 PM EDT
- Expired
- Apr 1, 2011, 3:57 AM EDT
- In force
- 6 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Morris County, NJ, Sussex County, NJ, Warren County, NJ, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 123 km from the middle of the area, began a volume at 07:58 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, 7.9 hours before the alert went out and 194 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
- 1463 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- -63 m²/s²
- 0-3 km storm-relative helicity
- 2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
613 WWUS41 KPHI 310754 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 354 AM EDT THU MAR 31 2011 ...HEAVY SNOW IS LIKELY TO OCCUR THURSDAY NIGHT AND INTO FRIDAY... .LOW PRESSURE IN THE FORM OF A SPRING NOR'EASTER MOVING UP ALONG THE COAST THIS EVENING WILL MOVE NORTHEASTWARD THROUGH OUR COASTAL WATERS LATE TONIGHT AND THEN THROUGH THE NEW YORK AND NEW ENGLAND COASTAL WATERS FRIDAY. NJZ001-007-008-PAZ054-055-061-062-311715- /O.UPG.KPHI.WS.A.0007.110401T0200Z-110401T1600Z/ /O.NEW.KPHI.WS.W.0009.110401T0200Z-110401T1600Z/ SUSSEX-WARREN-MORRIS-CARBON-MONROE-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN... JIM THORPE...STROUDSBURG...ALLENTOWN...BETHLEHEM...EASTON 354 AM EDT THU MAR 31 2011 ...WINTER STORM WARNING IN EFFECT FROM 10 PM THIS EVENING TO NOON EDT FRIDAY... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 10 PM THIS EVENING TO NOON EDT FRIDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * LOCATIONS...THE SOUTHERN POCONOS AND LEHIGH VALLEY OF EASTERN PENNSYLVANIA AND NORTHERN NEW JERSEY. * HAZARD TYPES...HEAVY SNOWFALL. * ACCUMULATIONS...5 TO 10 INCHES. THE GREATEST ACCUMULATIONS WILL OCCUR AT THE HIGHER ELEVATIONS. * TIMING...TONIGHT THROUGH FRIDAY MORNING. * IMPACTS...SLIPPERY ROADS AND DEGRADED TRAVEL...ALONG WITH ISOLATED DOWNED TREE LIMBS OR TREES AND RESULTANT ISOLATED POWER OUTAGES. * WINDS...NORTHEAST AT 10 TO 20 MPH WITH HIGHER GUSTS TONIGHT. WINDS BECOMING NORTHWEST FRIDAY. 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. && $$ PO
3 follow-up statements
354 WWUS41 KPHI 311502 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1102 AM EDT THU MAR 31 2011 ...HEAVY SNOW IS LIKELY TO OCCUR THURSDAY NIGHT AND INTO FRIDAY... .LOW PRESSURE IN THE FORM OF A SPRING NOR'EASTER MOVING UP ALONG THE COAST THIS EVENING WILL MOVE NORTHEASTWARD THROUGH OUR COASTAL WATERS LATE TONIGHT AND THEN THROUGH THE NEW YORK AND NEW ENGLAND COASTAL WATERS FRIDAY. NJZ001-007-008-PAZ054-055-061-062-312200- /O.CON.KPHI.WS.W.0009.110401T0200Z-110401T1600Z/ SUSSEX-WARREN-MORRIS-CARBON-MONROE-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN... JIM THORPE...STROUDSBURG...ALLENTOWN...BETHLEHEM...EASTON 1102 AM EDT THU MAR 31 2011 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO NOON EDT FRIDAY... A WINTER STORM WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO NOON EDT FRIDAY. * LOCATIONS...THE SOUTHERN POCONOS AND LEHIGH VALLEY OF EASTERN PENNSYLVANIA AND NORTHERN NEW JERSEY. * HAZARD TYPES...HEAVY SNOWFALL. * ACCUMULATIONS...5 TO 10 INCHES. THE GREATEST ACCUMULATIONS WILL OCCUR AT THE HIGHER ELEVATIONS. * TIMING...WIDESPREAD SNOW WILL DEVELOP TONIGHT AND CONTINUE THROUGH FRIDAY MORNING. THE HEAVIEST SNOW IS EXPECTED LATE TONIGHT INTO EARLY FRIDAY MORNING. * IMPACTS...SLIPPERY ROADS AND DEGRADED TRAVEL...ALONG WITH ISOLATED DOWNED TREE LIMBS OR TREES AND RESULTANT ISOLATED POWER OUTAGES. * WINDS...NORTHEAST AT 10 TO 20 MPH WITH HIGHER GUSTS TONIGHT. WINDS BECOMING NORTHWEST FRIDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... SLEET...AND ICE ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ MEOLA/PO
932 WWUS41 KPHI 311959 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 359 PM EDT THU MAR 31 2011 ...SNOW WILL OCCUR TONIGHT AND INTO FRIDAY MORNING... .LOW PRESSURE FORMING OFF OF THE CENTRAL MID ATLANTIC COAST THIS EVENING WILL INTENSIFY AS IT MOVES NORTHWARD JUST OFF THE NORTHERN MID ATLANTIC COAST TONIGHT AND FRIDAY MORNING. NJZ007-008-PAZ061-062-010900- /O.CAN.KPHI.WS.W.0009.110401T0200Z-110401T1600Z/ /O.NEW.KPHI.WW.Y.0020.110401T0200Z-110401T1400Z/ WARREN-MORRIS-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...WASHINGTON...MORRISTOWN...ALLENTOWN... BETHLEHEM...EASTON 359 PM EDT THU MAR 31 2011 ...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 10 AM EDT FRIDAY... ...WINTER STORM WARNING IS CANCELLED... 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 10 AM EDT FRIDAY. THE WINTER STORM WARNING HAS BEEN CANCELLED. * LOCATIONS...LEHIGH AND NORTHAMPTON COUNTIES IN EASTERN PENNSYLVANIA...AND WARREN AND MORRIS COUNTIES IN NORTHWESTERN NEW JERSEY. * HAZARD TYPES...MODERATE SNOW. * ACCUMULATIONS...2 TO 5 INCHES OF SNOW...WITH THE GREATEST ACCUMULATIONS OVER THE HIGHER ELEVATIONS. * TIMING...SNOW WILL DEVELOP TONIGHT AND CONTINUE INTO FRIDAY MORNING. THE HEAVIEST SNOW IS EXPECTED LATE TONIGHT INTO EARLY FRIDAY MORNING. * IMPACTS...SLIPPERY ROADS AND WALKS ALONG WITH DEGRADED TRAVEL. * WINDS...NORTHEAST 10 TO 15 MPH WITH GUSTS UP TO 20 MPH... BECOMING NORTHWEST FRIDAY MORNING. 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. && $$ NJZ001-PAZ054-055-010900- /O.CON.KPHI.WS.W.0009.110401T0200Z-110401T1600Z/ SUSSEX-CARBON-MONROE- INCLUDING THE CITIES OF...NEWTON...JIM THORPE...STROUDSBURG 359 PM EDT THU MAR 31 2011 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO NOON EDT FRIDAY... A WINTER STORM WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO NOON EDT FRIDAY. * LOCATIONS...CARBON AND MONROE COUNTIES IN EASTERN PENNSYLVANIA... AND SUSSEX COUNTY IN NORTHWESTERN NEW JERSEY. * HAZARD TYPES...HEAVY SNOW. * ACCUMULATIONS...4 TO 8 INCHES OF SNOW...WITH THE GREATEST ACCUMULATIONS OVER THE HIGHER ELEVATIONS. * TIMING...SNOW WILL DEVELOP TONIGHT AND CONTINUE THROUGH FRIDAY MORNING. THE HEAVIEST SNOW IS EXPECTED LATE TONIGHT INTO EARLY FRIDAY MORNING. * IMPACTS...SLIPPERY ROADS AND WALKS ALONG WITH DEGRADED TRAVEL. AN ISOLATED DOWNED TREE LIMB OR TREE AND RESULTANT ISOLATED POWER OUTAGE IS ALSO POSSIBLE. * WINDS...NORTHEAST 10 TO 15 MPH WITH GUSTS UP TO 20 MPH...BECOMING NORTHWEST FRIDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW... SLEET...AND ICE ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$
042 WWUS41 KPHI 010757 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 357 AM EDT FRI APR 1 2011 NJZ001-PAZ054-055-011400- /O.CAN.KPHI.WS.W.0009.000000T0000Z-110401T1600Z/ /O.NEW.KPHI.WW.Y.0021.110401T0757Z-110401T1400Z/ SUSSEX-CARBON-MONROE- INCLUDING THE CITIES OF...NEWTON...JIM THORPE...STROUDSBURG 357 AM EDT FRI APR 1 2011 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 AM EDT THIS MORNING... ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT UNTIL 10 AM EDT THIS MORNING. THE WINTER STORM WARNING HAS BEEN CANCELLED. * LOCATIONS...CARBON AND MONROE COUNTIES IN EASTERN PENNSYLVANIA... AND SUSSEX COUNTY IN NORTHWESTERN NEW JERSEY. * HAZARD TYPES...SNOW. * ACCUMULATIONS...2 TO 3 INCHES OF SNOW...WITH THE GREATEST ACCUMULATIONS OVER THE HIGHER ELEVATIONS. * TIMING...UNTIL 10 AM THIS MORNING. * IMPACTS...SLIPPERY ROADS AND WALKS ALONG WITH DEGRADED TRAVEL. 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. && $$ NJZ007-008-PAZ061-062-010900- /O.CAN.KPHI.WW.Y.0020.000000T0000Z-110401T1400Z/ WARREN-MORRIS-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...WASHINGTON...MORRISTOWN...ALLENTOWN... BETHLEHEM...EASTON 357 AM EDT FRI APR 1 2011 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CANCELLED THE WINTER WEATHER ADVISORY. ANY HIGHER ELEVATION SNOWFALL ACCUMULATION WILL BE LIGHT AND SHOULD NOT CAUSE ANY SIGNIFICANT PROBLEMS. $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 4:27 AM EDT | Small Craft Advisory | PHI | 6 hr | |
| Mar 31, 10:25 AM EDT | Gale Warning | PHI | 5 hr | |
| Mar 31, 3:59 PM EDT | Winter Weather Advisory | PHI | Morris, Warren | 12 hr |
Nearby
Winter Storm Warnings in Pennsylvania, 2011Winter Storm Warnings in New Jersey, 2011Every winter storm warning 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.