Alert archive / New Jersey / Frost Advisories in 2009
Frost Advisory 2, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at Apr 23, 2009, 4:00 AM EDT for 4 states. It took effect at Apr 24, 2009, 2:00 AM EDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Apr 23, 2009, 4:00 AM EDT (08:00 UTC)
- In effect from
- Apr 24, 2009, 2:00 AM EDT
- Expired
- Apr 24, 2009, 8:00 AM EDT
- In force
- 6 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Ocean County, NJ, Salem County, NJ, Delaware County, PA
The radar
The Dover AFB radar (KDOX), 62 km from the middle of the area, began a volume at 08:02 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
Wallops Is Stn, VA (KWAL), launched 00:00Z, 8.0 hours before the alert went out and 161 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
- 94 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 913 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS71 KPHI 230800 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 400 AM EDT THU APR 23 2009 ...AREAS OF FROST WILL OCCUR TONIGHT AND EARLY FRIDAY MORNING... .CLEAR SKIES, LIGHT WINDS, AND A COOL AIRMASS WILL LEAD TO AREAS OF FROST FORMATION LATE TONIGHT AND EARLY FRIDAY MORNING. DEZ001>003-MDZ008-012-015-019-020-NJZ016>023-027-PAZ067-070- 232100- /O.NEW.KPHI.FR.Y.0002.090424T0600Z-090424T1200Z/ NEW CASTLE-KENT-INLAND SUSSEX-CECIL-KENT MD-QUEEN ANNES-TALBOT- CAROLINE-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-OCEAN- CUMBERLAND-ATLANTIC-CAPE MAY-SOUTHEASTERN BURLINGTON-CHESTER- DELAWARE- INCLUDING THE CITIES OF...WILMINGTON...DOVER...GEORGETOWN... ELKTON...CHESTERTOWN...CENTREVILLE...EASTON...DENTON... PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN... MOUNT HOLLY...JACKSON...MILLVILLE...HAMMONTON... CAPE MAY COURT HOUSE...WHARTON STATE FOREST...WEST CHESTER... MEDIA 400 AM EDT THU APR 23 2009 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM EDT FRIDAY... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT FROM 2 AM TO 8 AM EDT FRIDAY. HIGH PRESSURE BUILDING IN FROM THE OHIO VALLEY TODAY WILL BRING CLEAR SKIES AND LIGHT WINDS TO THE REGION TONIGHT. THIS, COMBINED WITH COOL AIR DROPPING DOWN FROM THE NORTHWEST, WILL LEAD TO AREAS OF FROST AFTER MIDNIGHT TONIGHT, ESPECIALLY AWAY FROM URBAN AREAS. AS THE GROWING SEASON HAS GOTTEN UNDERWAY, SOME EARLY SPROUTS AND VEGETATION WILL BE VULNERABLE. THE FROST ADVISORY IS IN EFFECT FOR AREAS WHERE THE GROWING SEASON HAS STARTED. AREAS CLOSE TO THE SHORE AND DELAWARE BAY SHOULD REMAIN JUST WARM ENOUGH TO KEEP FROST FROM FORMING. BUT, AREAS OF FROST ARE POSSIBLE ELSEWHERE ESPECIALLY IN SHELTERED LOCATIONS, WHERE THE SOIL IS SANDY, AND IN THE PINE BARRENS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. COVER TENDER VEGETATION TODAY, OR BRING PLANTS INDOORS IF POSSIBLE. && $$
3 follow-up statements
000 WWUS71 KPHI 231940 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 340 PM EDT THU APR 23 2009 ...AREAS OF FROST WILL OCCUR LATE TONIGHT AND EARLY FRIDAY MORNING... DEZ001>003-MDZ008-012-015-019-020-NJZ016>023-027-PAZ067-070- 240830- /O.CON.KPHI.FR.Y.0002.090424T0600Z-090424T1200Z/ NEW CASTLE-KENT-INLAND SUSSEX-CECIL-KENT MD-QUEEN ANNES-TALBOT- CAROLINE-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-OCEAN- CUMBERLAND-ATLANTIC-CAPE MAY-SOUTHEASTERN BURLINGTON-CHESTER- DELAWARE- INCLUDING THE CITIES OF...WILMINGTON...DOVER...GEORGETOWN... ELKTON...CHESTERTOWN...CENTREVILLE...EASTON...DENTON... PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN... MOUNT HOLLY...JACKSON...MILLVILLE...HAMMONTON... CAPE MAY COURT HOUSE...WHARTON STATE FOREST...WEST CHESTER... MEDIA 340 PM EDT THU APR 23 2009 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 8 AM EDT FRIDAY... A FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 8 AM EDT FRIDAY. HIGH PRESSURE WILL MOVE ACROSS THE REGION TONIGHT BRINGING WITH IT CLEAR SKIES AND LIGHT WINDS. THIS...COMBINED WITH THE COOL AIR ALREADY OVER THE AREA...WILL LEAD TO AREAS OF FROST AFTER MIDNIGHT TONIGHT...ESPECIALLY AWAY FROM URBAN AREAS. AS THE GROWING SEASON HAS GOTTEN UNDERWAY...SOME EARLY SPROUTS AND VEGETATION WILL BE VULNERABLE. THE FROST ADVISORY IS IN EFFECT FOR AREAS WHERE THE GROWING SEASON HAS STARTED. AREAS CLOSE TO THE SHORE AND DELAWARE BAY SHOULD REMAIN JUST WARM ENOUGH TO KEEP FROST FROM FORMING. BUT... AREAS OF FROST ARE POSSIBLE ELSEWHERE ESPECIALLY IN SHELTERED LOCATIONS...WHERE THE SOIL IS SANDY...AND IN THE PINE BARRENS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. COVER TENDER VEGETATION TODAY... OR BRING PLANTS INDOORS IF POSSIBLE. && $$ RNS/DI/GH
000 WWUS71 KPHI 240730 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 330 AM EDT FRI APR 24 2009 ...AREAS OF FROST WILL OCCUR EARLY THIS MORNING... DEZ001>003-MDZ008-012-015-019-020-NJZ016>023-027-PAZ067-070- 241200- /O.CON.KPHI.FR.Y.0002.000000T0000Z-090424T1200Z/ NEW CASTLE-KENT-INLAND SUSSEX-CECIL-KENT MD-QUEEN ANNES-TALBOT- CAROLINE-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-OCEAN- CUMBERLAND-ATLANTIC-CAPE MAY-SOUTHEASTERN BURLINGTON-CHESTER- DELAWARE- INCLUDING THE CITIES OF...WILMINGTON...DOVER...GEORGETOWN... ELKTON...CHESTERTOWN...CENTREVILLE...EASTON...DENTON... PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN... MOUNT HOLLY...JACKSON...MILLVILLE...HAMMONTON... CAPE MAY COURT HOUSE...WHARTON STATE FOREST...WEST CHESTER... MEDIA 330 AM EDT FRI APR 24 2009 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... A FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING. A RIDGE OF HIGH PRESSURE OVER THE REGION EARLY THIS MORNING WAS BRINGING CLEAR SKIES AND LIGHT WINDS. THIS...COMBINED WITH THE COOL AIR OVER THE AREA...WILL LEAD TO PATCHY FROST EARLY THIS MORNING...ESPECIALLY AWAY FROM URBAN AREAS. AS THE GROWING SEASON HAS GOTTEN UNDERWAY...SOME EARLY SPROUTS AND VEGETATION WILL BE VULNERABLE. THE FROST ADVISORY IS IN EFFECT FOR AREAS WHERE THE GROWING SEASON HAS STARTED. AREAS CLOSE TO THE SHORE AND DELAWARE BAY SHOULD REMAIN JUST WARM ENOUGH TO KEEP FROST FROM FORMING. BUT... PATCHY FROST IS POSSIBLE ELSEWHERE ESPECIALLY IN SHELTERED LOCATIONS...WHERE THE SOIL IS SANDY...AND IN THE PINE BARRENS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. COVER TENDER VEGETATION TODAY... OR BRING PLANTS INDOORS IF POSSIBLE. && $$
000 WWUS71 KPHI 241155 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 755 AM EDT FRI APR 24 2009 DEZ001>003-MDZ008-012-015-019-020-NJZ016>023-027-PAZ067-070- 241300- /O.EXP.KPHI.FR.Y.0002.000000T0000Z-090424T1200Z/ NEW CASTLE-KENT-INLAND SUSSEX-CECIL-KENT MD-QUEEN ANNES-TALBOT- CAROLINE-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-OCEAN- CUMBERLAND-ATLANTIC-CAPE MAY-SOUTHEASTERN BURLINGTON-CHESTER- DELAWARE- INCLUDING THE CITIES OF...WILMINGTON...DOVER...GEORGETOWN... ELKTON...CHESTERTOWN...CENTREVILLE...EASTON...DENTON... PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN... MOUNT HOLLY...JACKSON...MILLVILLE...HAMMONTON... CAPE MAY COURT HOUSE...WHARTON STATE FOREST...WEST CHESTER... MEDIA 755 AM EDT FRI APR 24 2009 ...FROST ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING... WITH PLENTY OF SUNSHINE, TEMPERATURES WILL RISE QUICKLY THIS MORNING. AS A RESULT, THE FROST ADVISORY WILL EXPIRE AT 800 AM. $$ IOVINO
Nearby
Frost Advisories in New Jersey, 2009Frost Advisories in Maryland, 2009Frost Advisories in Delaware, 2009Every frost advisory in 2009
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.