Alert archive / New Jersey / Frost Advisories in 2011
Frost Advisory 2, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at Apr 21, 2011, 3:15 PM EDT for 11 counties in New Jersey; New Castle County, Delaware; Berks County, Delaware County, Pennsylvania. It took effect at Apr 22, 2011, 3:00 AM EDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Apr 21, 2011, 3:15 PM EDT (19:15 UTC)
- In effect from
- Apr 22, 2011, 3:00 AM EDT
- Expired
- Apr 22, 2011, 8:00 AM EDT
- In force
- 5 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties New Castle County, DE, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Salem County, NJ, Berks County, PA, Delaware County, PA
The radar
The Philadelphia radar (KDIX), 47 km from the middle of the area, began a volume at 19:18 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 107 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
- 1302 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- -119 m²/s²
- 0-3 km storm-relative helicity
- -344 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
699 WWUS71 KPHI 211915 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 315 PM EDT THU APR 21 2011 ...AREAS OF FROST POSSIBLE LATE TONIGHT AND EARLY FRIDAY MORNING... .HIGH PRESSURE WILL BUILD ACROSS THE AREA THROUGH TONIGHT, ALLOWING THE WINDS TO DIMINISH. THE COMBINATION OF LIGHTER WINDS, A DRY AIR MASS AND A CLEAR TO PARTLY CLOUDY SKY WILL ALLOW TEMPERATURES TO DROP INTO THE 30S. THIS MAY RESULT IN THE FORMATION OF AREAS OF FROST. DEZ001-NJZ012-013-015>023-027-PAZ060-067>070-220900- /O.NEW.KPHI.FR.Y.0002.110422T0700Z-110422T1200Z/ NEW CASTLE-MIDDLESEX-WESTERN MONMOUTH-MERCER-SALEM-GLOUCESTER- CAMDEN-NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY- SOUTHEASTERN BURLINGTON-BERKS-CHESTER-MONTGOMERY-BUCKS-DELAWARE- INCLUDING THE CITIES OF...WILMINGTON...NEW BRUNSWICK...FREEHOLD... TRENTON...PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL... MOORESTOWN...MOUNT HOLLY...JACKSON...MILLVILLE...HAMMONTON... CAPE MAY COURT HOUSE...WHARTON STATE FOREST...READING... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA 315 PM EDT THU APR 21 2011 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 8 AM EDT FRIDAY... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A FROST ADVISORY, WHICH IS IN EFFECT FROM 3 AM TO 8 AM EDT FRIDAY. * LOCATIONS...SOUTHEASTERN PENNSYLVANIA, CENTRAL AND SOUTHERN NEW JERSEY AND NORTHERN DELAWARE. THIS DOES NOT INCLUDE PHILADELPHIA COUNTY AND THE IMMEDIATE COAST OF NEW JERSEY. * TEMPERATURES...DROPPING INTO THE LOWER TO MID 30S LATE TONIGHT AND EARLY FRIDAY MORNING. * WINDS...NORTHWEST TO NORTH AND DIMINISHING TO AROUND 5 MPH. * IMPACTS...THE FORMATION OF SOME FROST COULD DAMAGE BLOSSOMS AND TENDER VEGETATION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. POTTED PLANTS NORMALLY LEFT OUTDOORS SHOULD BE COVERED OR BROUGHT INSIDE. && $$ GORSE
2 follow-up statements
492 WWUS71 KPHI 220841 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 441 AM EDT FRI APR 22 2011 DEZ001-NJZ012-013-015>023-027-PAZ060-067>070-221200- /O.CON.KPHI.FR.Y.0002.000000T0000Z-110422T1200Z/ NEW CASTLE-MIDDLESEX-WESTERN MONMOUTH-MERCER-SALEM-GLOUCESTER- CAMDEN-NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY- SOUTHEASTERN BURLINGTON-BERKS-CHESTER-MONTGOMERY-BUCKS-DELAWARE- INCLUDING THE CITIES OF...WILMINGTON...NEW BRUNSWICK...FREEHOLD... TRENTON...PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL... MOORESTOWN...MOUNT HOLLY...JACKSON...MILLVILLE...HAMMONTON... CAPE MAY COURT HOUSE...WHARTON STATE FOREST...READING... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA 441 AM EDT FRI APR 22 2011 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... * LOCATIONS...SOUTHEASTERN PENNSYLVANIA... CENTRAL AND SOUTHERN NEW JERSEY AND NORTHERN DELAWARE. THIS DOES NOT INCLUDE PHILADELPHIA COUNTY AND THE IMMEDIATE COAST OF NEW JERSEY. * TEMPERATURES...IN THE LOWER TO MID 30S. * WINDS...NORTHEAST UP TO 5 TO 10 MPH. * IMPACTS...THE FORMATION OF SOME FROST COULD DAMAGE BLOSSOMS AND TENDER VEGETATION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. POTTED PLANTS NORMALLY LEFT OUTDOORS SHOULD BE COVERED OR BROUGHT INSIDE. && $$
653 WWUS71 KPHI 221155 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 755 AM EDT FRI APR 22 2011 DEZ001-NJZ012-013-015>023-027-PAZ060-067>070-221300- /O.EXP.KPHI.FR.Y.0002.000000T0000Z-110422T1200Z/ NEW CASTLE-MIDDLESEX-WESTERN MONMOUTH-MERCER-SALEM-GLOUCESTER- CAMDEN-NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY- SOUTHEASTERN BURLINGTON-BERKS-CHESTER-MONTGOMERY-BUCKS-DELAWARE- INCLUDING THE CITIES OF...WILMINGTON...NEW BRUNSWICK...FREEHOLD... TRENTON...PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL... MOORESTOWN...MOUNT HOLLY...JACKSON...MILLVILLE...HAMMONTON... CAPE MAY COURT HOUSE...WHARTON STATE FOREST...READING... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA 755 AM EDT FRI APR 22 2011 ...FROST ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING... THE FROST ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING. TEMPERATURES DROPPED INTO THE 30S EARLY THIS MORNING...IN SOME CASES INTO THE LOWER 30S...BUT WERE RECOVERING AFTER MORNING LOWS. $$
Nearby
Frost Advisories in New Jersey, 2011Frost Advisories in Pennsylvania, 2011Frost Advisories in Delaware, 2011Every frost advisory 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.