Alert archive / Pennsylvania / Frost Advisories in 2012
Frost Advisory 2, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at Apr 4, 2012, 3:39 AM EDT for Berks County, Lehigh County, Northampton County, Pennsylvania; Warren County, New Jersey. It took effect at Apr 5, 2012, 4:00 AM EDT. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Apr 4, 2012, 3:39 AM EDT (07:39 UTC)
- In effect from
- Apr 5, 2012, 4:00 AM EDT
- Expired
- Apr 5, 2012, 7:51 AM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Warren County, NJ, Berks County, PA, Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 119 km from the middle of the area, began a volume at 07:42 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, 7.7 hours before the alert went out and 219 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
- 3940 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 96 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
717 WWUS71 KPHI 040739 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 339 AM EDT WED APR 4 2012 NJZ007-PAZ060>062-042000- /O.NEW.KPHI.FR.Y.0002.120405T0800Z-120405T1200Z/ WARREN-BERKS-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...WASHINGTON...READING...ALLENTOWN... BETHLEHEM...EASTON 339 AM EDT WED APR 4 2012 ...FROST ADVISORY IN EFFECT FROM 4 AM TO 8 AM EDT THURSDAY... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT FROM 4 AM TO 8 AM EDT THURSDAY. * LOCATIONS...FROM THE VICINITY OF READING PENNSYLVANIA THROUGH THE LEHIGH VALLEY INTO WARREN COUNTY OF NORTHWEST NEW JERSEY. * TEMPERATURES...IN THE 30S. * TIMING...BEST CHANCE FOR FROST IS AN HOUR OR SO BEFORE SUNRISE. * CONFIDENCE...THERE IS A SMALL CHANCE THAT THERE WILL BE ENOUGH WIND DURING THE NIGHT TO PREVENT A FROST. IF FOR THIS REASON... FROST DOESN'T OCCUR EARLY THURSDAY... THERE APPEARS TO BE A HIGHER LIKELIHOOD OF FROST OR FREEZING TEMPERATURES EARLY FRIDAY AND EARLY SATURDAY AND WITH LONGER DURATION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$ DRAG
3 follow-up statements
645 WWUS71 KPHI 041931 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 331 PM EDT WED APR 4 2012 NJZ007-PAZ060>062-051200- /O.CON.KPHI.FR.Y.0002.120405T0800Z-120405T1200Z/ WARREN-BERKS-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...WASHINGTON...READING...ALLENTOWN... BETHLEHEM...EASTON 331 PM EDT WED APR 4 2012 ...FROST ADVISORY REMAINS IN EFFECT FROM 4 AM TO 8 AM EDT THURSDAY... * LOCATIONS...FROM THE VICINITY OF READING PENNSYLVANIA THROUGH THE LEHIGH VALLEY INTO WARREN COUNTY OF NORTHWEST NEW JERSEY. * TEMPERATURES...LOWS MAINLY IN THE MID 30S. * TIMING...BEST CHANCE FOR FROST IS AN HOUR OR SO BEFORE SUNRISE. * CONFIDENCE...THERE IS A SMALL CHANCE THAT THERE WILL BE ENOUGH WIND DURING THE NIGHT TO PREVENT A FROST. IF FOR THIS REASON... FROST DOESN'T OCCUR EARLY THURSDAY...THERE APPEARS TO BE A HIGHER LIKELIHOOD OF FROST OR FREEZING TEMPERATURES EARLY FRIDAY AND EARLY SATURDAY AND WITH LONGER DURATION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. PLEASE BRING AND LEAVE INDOORS ANY PLANTS THAT ARE SENSITIVE TO THE COLD AS THE NEXT COUPLE OF NIGHTS WILL ALSO BE COLD. && $$
892 WWUS71 KPHI 050911 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 511 AM EDT THU APR 5 2012 NJZ007-PAZ060>062-051200- /O.CON.KPHI.FR.Y.0002.000000T0000Z-120405T1200Z/ WARREN-BERKS-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...WASHINGTON...READING...ALLENTOWN... BETHLEHEM...EASTON 511 AM EDT THU APR 5 2012 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... * LOCATIONS...FROM THE VICINITY OF READING PENNSYLVANIA THROUGH THE LEHIGH VALLEY INTO WARREN COUNTY OF NORTHWEST NEW JERSEY. * TEMPERATURES...LOWS MAINLY IN THE MID 30S. * IMPACTS...BUDDING FRUIT TREES AND OTHER VEGETATION SENSITIVE TO THE COLD MAY SUFFER DAMAGE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT SENSITIVE OUTDOOR PLANTS MAY BE DAMAGED. IF POSSIBLE...PLEASE BRING INDOORS ANY PLANTS THAT ARE SENSITIVE TO THE COLD. && $$
205 WWUS71 KPHI 051151 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 751 AM EDT THU APR 5 2012 NJZ007-PAZ060>062-052100- /O.CAN.KPHI.FR.Y.0002.000000T0000Z-120405T1200Z/ /O.NEW.KPHI.FZ.W.0005.120406T0700Z-120406T1200Z/ WARREN-BERKS-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...WASHINGTON...READING...ALLENTOWN... BETHLEHEM...EASTON 751 AM EDT THU APR 5 2012 ...FREEZE WARNING IN EFFECT FROM 3 AM TO 8 AM EDT FRIDAY... ...FROST ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A FREEZE WARNING...WHICH IS IN EFFECT FROM 3 AM TO 8 AM EDT FRIDAY. * TEMPERATURES...NEAR 30 DEGREES. * TIMING...AFTER MIDNIGHT TONIGHT. * IMPACTS...FLOWERING FRUIT TREES AND OTHER VEGETATION SENSITIVE TO THE COLD MAY SUFFER DAMAGE. MORE FREEZING TEMPERATURES ARE POSSIBLE AGAIN ON FRIDAY NIGHT. * GEOGRAPHICAL EXPANSION OF WARNING...MAY BE EXTENDED INTO PARTS OF THE PHILADELPHIA SUBURBS AND DELMARVA LATER TODAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. WHERE POSSIBLE BRING AND LEAVE SENSITIVE VEGETATION INDOORS. && $$ NJZ008>010-020>022-027-052100- /O.NEW.KPHI.FZ.W.0005.120406T0700Z-120406T1200Z/ MORRIS-HUNTERDON-SOMERSET-OCEAN-CUMBERLAND-ATLANTIC- SOUTHEASTERN BURLINGTON- INCLUDING THE CITIES OF...MORRISTOWN...FLEMINGTON...SOMERVILLE... JACKSON...MILLVILLE...HAMMONTON...WHARTON STATE FOREST 751 AM EDT THU APR 5 2012 ...FREEZE WARNING IN EFFECT FROM 3 AM TO 8 AM EDT FRIDAY... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A FREEZE WARNING...WHICH IS IN EFFECT FROM 3 AM TO 8 AM EDT FRIDAY. * TEMPERATURES...IN THE LOWER 30S. * TIMING...AFTER MIDNIGHT TONIGHT. * IMPACTS...FLOWERING FRUIT TREES AND OTHER VEGETATION SENSITIVE TO THE COLD MAY SUFFER DAMAGE. MORE FREEZING TEMPERATURES ARE POSSIBLE AGAIN ON FRIDAY NIGHT. * GEOGRAPHICAL EXPANSION OF WARNING...MAY BE EXTENDED INTO PARTS OF THE PHILADELPHIA SUBURBS AND DELMARVA LATER TODAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. WHERE POSSIBLE BRING AND LEAVE SENSITIVE VEGETATION INDOORS. && $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 11:00 AM EDT | Red Flag Warning | PHI | Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more | 9 hr |
| Apr 4, 3:30 AM EDT | Small Craft Advisory | PHI | 32 hr |
Nearby
Frost Advisories in Pennsylvania, 2012Frost Advisories in New Jersey, 2012Every frost advisory in 2012
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.