Alert archive / Pennsylvania / Snow Advisories in 2007
Snow Advisory 5, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this snow advisory at Mar 15, 2007, 5:07 PM EDT for 5 counties in Pennsylvania; 5 counties in New Jersey. It took effect at Mar 16, 2007, 2:00 AM EDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Mar 15, 2007, 5:07 PM EDT (21:07 UTC)
- In effect from
- Mar 16, 2007, 2:00 AM EDT
- Expired
- Mar 15, 2007, 8:07 PM EDT
- In force
- Issued by
- NWS Philadelphia/Mount Holly
Counties Hunterdon 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), 112 km from the middle of the area, began a volume at 21:11 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, 9.1 hours before the alert went out and 166 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
- 1 J/kg
- Mixed-layer CIN
- -310 J/kg
- Mixed-layer LCL
- 1419 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS41 KPHI 152107 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 507 PM EDT THU MAR 15 2007 NJZ001-PAZ054-055-160515- /O.UPG.KPHI.WS.A.0003.070316T0500Z-070317T0800Z/ /O.NEW.KPHI.SN.Y.0005.070316T0600Z-070317T1200Z/ SUSSEX-CARBON-MONROE- INCLUDING THE CITIES OF...NEWTON...JIM THORPE...STROUDSBURG 507 PM EDT THU MAR 15 2007 ...SNOW ADVISORY IN EFFECT FROM 2 AM FRIDAY TO 8 AM EDT SATURDAY... ...WINTER STORM WATCH NO LONGER IN EFFECT... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A SNOW ADVISORY...WHICH IS IN EFFECT FROM 2 AM FRIDAY TO 8 AM EDT SATURDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. LOW PRESSURE DEVELOPING ALONG THE CENTRAL GULF COAST LATE TODAY IS FORECAST TO DEEPEN AND MOVE NORTHEAST TO NEAR THE MID ATLANTIC COAST BY FRIDAY NIGHT...THEN CONTINUE TO STRENGTHEN AND LIFT NORTHEAST ALONG THE NEW ENGLAND COAST ON SATURDAY. AS IT GAINS STRENGTH THE LOW PRESSURE WILL PULL MUCH COLDER AIR SOUTHWARD ACROSS THE MID-ATLANTIC REGION. THE RESULT WILL BE A PERIOD OF WINTRY WEATHER FROM LATE TONIGHT THROUGH EARLY SATURDAY. RAIN THIS EVENING WILL CHANGE TO SNOW OVERNIGHT...AND PERIODS OF SNOW WILL CONTINUE ON FRIDAY AND FRIDAY NIGHT...AND POSSIBLY INTO SATURDAY. SNOWFALL RATES WILL BE RELATIVELY LIGHT...MOSTLY LESS THAN AN INCH PER HOUR...BUT STORM TOTAL ACCUMULATION OVER TWO DAYS COULD BE 8 TO 12 INCHES. BECAUSE OF THE RECENT WARMTH...SNOW MAY BE SLOW TO ACCUMULATE AT FIRST. HOWEVER...THE SNOW COULD BE OF THE WET AND HEAVY VARIETY...WHICH WOULD MAKE CLEARING OF ROADWAYS MORE DIFFICULT. DANGEROUS TRAVELING CONDITIONS ARE POSSIBLE FROM LATE THURSDAY NIGHT INTO EARLY SATURDAY. PEOPLE IN THE WATCH AREA SHOULD STAY TUNED TO SUBSEQUENT FORECAST...ADVISORIES OR WARNINGS. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ NJZ007-008-PAZ060>062-160515- /O.UPG.KPHI.WS.A.0003.070316T1100Z-070317T0800Z/ /O.NEW.KPHI.SN.Y.0005.070316T1200Z-070317T1200Z/ WARREN-MORRIS-BERKS-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...WASHINGTON...MORRISTOWN...READING... ALLENTOWN...BETHLEHEM...EASTON 507 PM EDT THU MAR 15 2007 ...SNOW ADVISORY IN EFFECT FROM 8 AM FRIDAY TO 8 AM EDT SATURDAY... ...WINTER STORM WATCH NO LONGER IN EFFECT... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A SNOW ADVISORY...WHICH IS IN EFFECT FROM 8 AM FRIDAY TO 8 AM EDT SATURDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. LOW PRESSURE DEVELOPING ALONG THE CENTRAL GULF COAST LATE TODAY IS FORECAST TO DEEPEN AND MOVE NORTHEAST TO NEAR THE MID ATLANTIC COAST BY FRIDAY NIGHT...THEN CONTINUE TO STRENGTHEN AND LIFT NORTHEAST ALONG THE NEW ENGLAND COAST ON SATURDAY. AS IT GAINS STRENGTH THE LOW PRESSURE WILL PULL MUCH COLDER AIR SOUTHWARD ACROSS THE MID-ATLANTIC REGION. THE RESULT WILL BE A PERIOD OF WINTRY WEATHER FROM LATE TONIGHT THROUGH EARLY SATURDAY. RAIN THIS EVENING WILL CHANGE TO SNOW OVERNIGHT...AND PERIODS OF SNOW WILL CONTINUE ON FRIDAY AND FRIDAY NIGHT...AND POSSIBLY INTO SATURDAY. SNOWFALL RATES WILL BE RELATIVELY LIGHT...MOSTLY LESS THAN AN INCH PER HOUR...BUT STORM TOTAL ACCUMULATION OVER TWO DAYS COULD BE 6 TO 10 INCHES. BECAUSE OF THE RECENT WARMTH...SNOW MAY BE SLOW TO ACCUMULATE AT FIRST. HOWEVER...THE SNOW COULD BE OF THE WET AND HEAVY VARIETY...WHICH WOULD MAKE CLEARING OF ROADWAYS MORE DIFFICULT. DANGEROUS TRAVELING CONDITIONS ARE POSSIBLE FROM LATE THURSDAY NIGHT INTO EARLY SATURDAY. PEOPLE IN THE WATCH AREA SHOULD STAY TUNED TO SUBSEQUENT FORECAST...ADVISORIES OR WARNINGS. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ NJZ009-010-PAZ068-069-160515- /O.UPG.KPHI.WS.A.0003.070316T1500Z-070317T0800Z/ /O.NEW.KPHI.SN.Y.0005.070316T1200Z-070317T1200Z/ HUNTERDON-SOMERSET-MONTGOMERY-BUCKS- INCLUDING THE CITIES OF...FLEMINGTON...SOMERVILLE...NORRISTOWN... DOYLESTOWN 507 PM EDT THU MAR 15 2007 ...SNOW ADVISORY IN EFFECT FROM 8 AM FRIDAY TO 8 AM EDT SATURDAY... ...WINTER STORM WATCH NO LONGER IN EFFECT... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A SNOW ADVISORY...WHICH IS IN EFFECT FROM 8 AM FRIDAY TO 8 AM EDT SATURDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. LOW PRESSURE DEVELOPING ALONG THE CENTRAL GULF COAST LATE TODAY IS FORECAST TO DEEPEN AND MOVE NORTHEAST TO NEAR THE MID ATLANTIC COAST BY FRIDAY NIGHT...THEN CONTINUE TO STRENGTHEN AND LIFT NORTHEAST ALONG THE NEW ENGLAND COAST ON SATURDAY. AS IT GAINS STRENGTH THE LOW PRESSURE WILL PULL MUCH COLDER AIR SOUTHWARD ACROSS THE MID-ATLANTIC REGION. THE RESULT WILL BE A PERIOD OF WINTRY WEATHER FROM LATE TONIGHT THROUGH EARLY SATURDAY. RAIN THIS EVENING WILL CHANGE TO SNOW BY EARLY FRIDAY MORNING... AND PERIODS OF SNOW WILL CONTINUE ON FRIDAY AND FRIDAY NIGHT...AND POSSIBLY INTO SATURDAY. SNOWFALL RATES WILL BE RELATIVELY LIGHT...MOSTLY LESS THAN AN INCH PER HOUR...BUT STORM TOTAL ACCUMULATION OVER TWO DAYS COULD BE 3 TO 6 INCHES. BECAUSE OF THE RECENT WARMTH...SNOW MAY BE SLOW TO ACCUMULATE AT FIRST. HOWEVER...THE SNOW COULD BE OF THE WET AND HEAVY VARIETY...WHICH WOULD MAKE CLEARING OF ROADWAYS MORE DIFFICULT. DANGEROUS TRAVELING CONDITIONS ARE POSSIBLE FROM LATE THURSDAY NIGHT INTO EARLY SATURDAY. PEOPLE IN THE WATCH AREA SHOULD STAY TUNED TO SUBSEQUENT FORECAST...ADVISORIES OR WARNINGS. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$
1 follow-up statement
000 WWUS41 KPHI 160007 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 807 PM EDT THU MAR 15 2007 NJZ009-010-PAZ068-069-161100- /O.CAN.KPHI.SN.Y.0005.070316T1200Z-070317T1200Z/ /O.NEW.KPHI.WW.Y.0011.070316T1200Z-070317T1200Z/ HUNTERDON-SOMERSET-MONTGOMERY-BUCKS- INCLUDING THE CITIES OF...FLEMINGTON...SOMERVILLE...NORRISTOWN... DOYLESTOWN 807 PM EDT THU MAR 15 2007 ...WINTER WEATHER ADVISORY IN EFFECT FROM 8 AM FRIDAY TO 8 AM EDT SATURDAY... ...SNOW ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER WEATHER ADVISORY...WHICH IS IN EFFECT FROM 8 AM FRIDAY TO 8 AM EDT SATURDAY. THE SNOW ADVISORY HAS BEEN CANCELLED. LOW PRESSURE DEVELOPING ALONG THE CENTRAL GULF COAST IS FORECAST TO DEEPEN AND MOVE NORTHEAST TO NEAR THE MID ATLANTIC COAST BY FRIDAY NIGHT...THEN CONTINUE TO STRENGTHEN AND LIFT NORTHEAST ALONG THE NEW ENGLAND COAST ON SATURDAY. AS IT GAINS STRENGTH THE LOW PRESSURE WILL PULL MUCH COLDER AIR SOUTHWARD ACROSS THE MID- ATLANTIC REGION. THE RESULT WILL BE A PERIOD OF WINTRY WEATHER FROM LATE TONIGHT THROUGH EARLY SATURDAY. RAIN THIS EVENING WILL CHANGE TO SLEET AND SNOW BY EARLY FRIDAY MORNING... AND PERIODS OF SNOW AND SLEET WILL CONTINUE ON FRIDAY AND FRIDAY NIGHT... AND POSSIBLY INTO SATURDAY. SNOWFALL RATES WILL BE RELATIVELY LIGHT...MOSTLY LESS THAN AN INCH PER HOUR...BUT STORM TOTAL ACCUMULATION OVER TWO DAYS COULD BE 3 TO 6 INCHES...WITH SOME OF THIS ACCUMULATION IN THE FORM OF SLEET. THE HEAVIEST SNOWFALL WILL LIKELY FALL LATER IN THE DAY ON FRIDAY AND INTO FRIDAY NIGHT. BECAUSE OF THE RECENT WARMTH...SNOW MAY BE SLOW TO ACCUMULATE AT FIRST. HOWEVER...THE SNOW COULD BE OF THE WET AND HEAVY VARIETY... WHICH WOULD MAKE CLEARING OF ROADWAYS MORE DIFFICULT. DANGEROUS TRAVELING CONDITIONS ARE POSSIBLE FROM LATE THURSDAY NIGHT INTO EARLY SATURDAY. PEOPLE IN THE WATCH AREA SHOULD STAY TUNED TO SUBSEQUENT FORECAST...ADVISORIES OR WARNINGS. 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-PAZ054-055-161100- /O.UPG.KPHI.SN.Y.0005.070316T0600Z-070317T1200Z/ /O.NEW.KPHI.WS.W.0003.070316T1200Z-070317T1200Z/ /O.NEW.KPHI.WW.Y.0011.070316T0007Z-070316T1200Z/ SUSSEX-CARBON-MONROE- INCLUDING THE CITIES OF...NEWTON...JIM THORPE...STROUDSBURG 807 PM EDT THU MAR 15 2007 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 8 AM EDT FRIDAY... ...WINTER STORM WARNING IN EFFECT FROM 8 AM FRIDAY TO 8 AM EDT SATURDAY... ...SNOW ADVISORY NO LONGER IN EFFECT... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER WEATHER ADVISORY. THIS WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 8 AM EDT FRIDAY. A WINTER STORM WARNING HAS ALSO BEEN ISSUED...WHICH IS IN EFFECT FROM 8 AM FRIDAY TO 8 AM EDT SATURDAY. THE SNOW ADVISORY IS NO LONGER IN EFFECT. LOW PRESSURE DEVELOPING ALONG THE CENTRAL GULF COAST IS FORECAST TO DEEPEN AND MOVE NORTHEAST TO NEAR THE MID ATLANTIC COAST BY FRIDAY NIGHT...THEN CONTINUE TO STRENGTHEN AND LIFT NORTHEAST ALONG THE NEW ENGLAND COAST ON SATURDAY. AS IT GAINS STRENGTH THE LOW PRESSURE WILL PULL MUCH COLDER AIR SOUTHWARD ACROSS THE MID- ATLANTIC REGION. THE RESULT WILL BE A PERIOD OF WINTRY WEATHER FROM LATE TONIGHT THROUGH EARLY SATURDAY. RAIN THIS EVENING WILL CHANGE TO SNOW AND SLEET OVERNIGHT...AND PERIODS OF SNOW AND SLEET WILL CONTINUE ON FRIDAY AND FRIDAY NIGHT...AND POSSIBLY INTO SATURDAY. SNOWFALL RATES WILL BE RELATIVELY LIGHT...MOSTLY LESS THAN AN INCH PER HOUR...BUT STORM TOTAL ACCUMULATION OVER TWO DAYS COULD BE 8 TO 12 INCHES...WITH SOME OF THIS ACCUMULATION IN THE FORM OF SLEET. THE HEAVIEST SNOWFALL WILL LIKELY FALL LATER IN THE DAY ON FRIDAY AND INTO FRIDAY NIGHT. BECAUSE OF THE RECENT WARMTH...SNOW MAY BE SLOW TO ACCUMULATE AT FIRST. HOWEVER...THE SNOW COULD BE OF THE WET AND HEAVY VARIETY... WHICH WOULD MAKE CLEARING OF ROADWAYS MORE DIFFICULT. DANGEROUS TRAVELING CONDITIONS ARE POSSIBLE FROM LATE THURSDAY NIGHT INTO EARLY SATURDAY. PEOPLE IN THE WATCH AREA SHOULD STAY TUNED TO SUBSEQUENT FORECAST...ADVISORIES OR WARNINGS. 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. 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-PAZ060>062-161100- /O.UPG.KPHI.SN.Y.0005.070316T1200Z-070317T1200Z/ /O.NEW.KPHI.WS.W.0003.070316T1200Z-070317T1200Z/ WARREN-MORRIS-BERKS-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...WASHINGTON...MORRISTOWN...READING... ALLENTOWN...BETHLEHEM...EASTON 807 PM EDT THU MAR 15 2007 ...WINTER STORM WARNING IN EFFECT FROM 8 AM FRIDAY TO 8 AM EDT SATURDAY... ...SNOW ADVISORY NO LONGER IN EFFECT... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER STORM WARNING...WHICH IS IN EFFECT FROM 8 AM FRIDAY TO 8 AM EDT SATURDAY. THE SNOW ADVISORY IS NO LONGER IN EFFECT. LOW PRESSURE DEVELOPING ALONG THE CENTRAL GULF COAST IS FORECAST TO DEEPEN AND MOVE NORTHEAST TO NEAR THE MID ATLANTIC COAST BY FRIDAY NIGHT...THEN CONTINUE TO STRENGTHEN AND LIFT NORTHEAST ALONG THE NEW ENGLAND COAST ON SATURDAY. AS IT GAINS STRENGTH THE LOW PRESSURE WILL PULL MUCH COLDER AIR SOUTHWARD ACROSS THE MID- ATLANTIC REGION. THE RESULT WILL BE A PERIOD OF WINTRY WEATHER FROM LATE TONIGHT THROUGH EARLY SATURDAY. RAIN THIS EVENING WILL CHANGE TO SLEET AND SNOW BY EARLY FRIDAY MORNING... AND PERIODS OF SNOW AND SLEET WILL CONTINUE ON FRIDAY AND FRIDAY NIGHT... AND POSSIBLY INTO SATURDAY. SNOWFALL RATES WILL BE RELATIVELY LIGHT...MOSTLY LESS THAN AN INCH PER HOUR...BUT STORM TOTAL ACCUMULATION OVER TWO DAYS COULD BE 6 TO 10 INCHES...WITH SOME OF THIS ACCUMULATION IN THE FORM OF SLEET. THE HEAVIEST SNOWFALL WILL LIKELY FALL LATER IN THE DAY ON FRIDAY AND INTO FRIDAY NIGHT. BECAUSE OF THE RECENT WARMTH...SNOW MAY BE SLOW TO ACCUMULATE AT FIRST. HOWEVER...THE SNOW COULD BE OF THE WET AND HEAVY VARIETY... WHICH WOULD MAKE CLEARING OF ROADWAYS MORE DIFFICULT. DANGEROUS TRAVELING CONDITIONS ARE POSSIBLE FROM LATE THURSDAY NIGHT INTO EARLY SATURDAY. PEOPLE IN THE WATCH AREA SHOULD STAY TUNED TO SUBSEQUENT FORECAST...ADVISORIES OR WARNINGS. 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. $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 15, 4:10 AM EDT | Winter Storm Watch | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 13 hr |
Nearby
Snow Advisories in Pennsylvania, 2007Snow Advisories in New Jersey, 2007Every snow advisory in 2007
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.