Alert archive / New Jersey / Frost Advisories in 2007
Frost Advisory 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at Apr 20, 2007, 2:36 PM EDT for 5 counties in Maryland; 6 counties in New Jersey; Kent County, New Castle County, Sussex County, Delaware. It took effect at Apr 21, 2007, 2:00 AM EDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Apr 20, 2007, 2:36 PM EDT (18:36 UTC)
- In effect from
- Apr 21, 2007, 2:00 AM EDT
- Expired
- Apr 21, 2007, 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, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ
The radar
The Dover AFB radar (KDOX), 56 km from the middle of the area, began a volume at 18:39 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, 6.6 hours before the alert went out and 57 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
- 1209 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS71 KPHI 201836 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 236 PM EDT FRI APR 20 2007 ...AREAS OF FROST EXPECTED EARLY SATURDAY MORNING... DEZ001>003-MDZ008-012-015-019-020-NJZ016>019-021-022-027-211200- /O.NEW.KPHI.FR.Y.0001.070421T0600Z-070421T1200Z/ NEW CASTLE-KENT DE-INLAND SUSSEX-CECIL-KENT MD-QUEEN ANNES- TALBOT-CAROLINE-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON- CUMBERLAND-ATLANTIC-SOUTHEASTERN BURLINGTON- INCLUDING THE CITIES OF...WILMINGTON...DOVER...GEORGETOWN... ELKTON...CHESTERTOWN...CENTREVILLE...EASTON...DENTON... PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN... MOUNT HOLLY...MILLVILLE...HAMMONTON...WHARTON STATE FOREST 236 PM EDT FRI APR 20 2007 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM EDT SATURDAY... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A FROST ADVISORY, WHICH IS IN EFFECT FROM 2 AM TO 8 AM EDT SATURDAY. HIGH PRESSURE WILL BUILD INTO THE REGION FROM THE WEST, BRINGING A CLEAR SKY AND LIGHT WINDS OVERNIGHT. THESE CONDITIONS, COUPLED WITH A DRY AIR MASS, WILL ALLOW LOW TEMPERATURES EARLY SATURDAY MORNING TO BE BETWEEN 33 AND 36 DEGREES IN MOST INLAND RURAL LOCATIONS. THIS WILL LEAD TO THE FORMATION OF SOME FROST, FOR AREAS THAT THE GROWING SEASON IS WELL UNDERWAY. A FEW OF THE COLDEST LOCATIONS, SUCH AS THE PINE BARRENS IN SOUTHERN NEW JERSEY, SHOULD HAVE TEMPERATURES BOTTOM OUT NEAR 30 DEGREES OVERNIGHT. THE LARGER TOWNS AND CITIES WILL HAVE AN OVERNIGHT LOW TEMPERATURE WITHIN A FEW DEGREES OF 40. A FROST ADVISORY MEANS THAT AREAS OF FROST ARE EXPECTED IN THE ADVISORY AREA. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNPROTECTED OUTSIDE. IF POSSIBLE, BRING PLANTS INDOORS THAT ARE SENSITIVE TO THE COLD TO PROTECT THEM. $$ GORSE
2 follow-up statements
000 WWUS71 KPHI 210755 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 355 AM EDT SAT APR 21 2007 DEZ001>003-MDZ008-012-015-019-020-NJZ016>019-021-022-027-211200- /O.CON.KPHI.FR.Y.0001.000000T0000Z-070421T1200Z/ NEW CASTLE-KENT DE-INLAND SUSSEX-CECIL-KENT MD-QUEEN ANNES- TALBOT-CAROLINE-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON- CUMBERLAND-ATLANTIC-SOUTHEASTERN BURLINGTON- INCLUDING THE CITIES OF...WILMINGTON...DOVER...GEORGETOWN... ELKTON...CHESTERTOWN...CENTREVILLE...EASTON...DENTON... PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN... MOUNT HOLLY...MILLVILLE...HAMMONTON...WHARTON STATE FOREST 355 AM EDT SAT APR 21 2007 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... UNDER A CLEAR SKY WITH A LIGHT WIND, TEMPERATURES HAVE DROPPED INTO THE MIDDLE AND UPPER 30S IN PARTS OF SOUTHERN NEW JERSEY, DELAWARE AND NORTHEASTERN MARYLAND EARLY THIS MORNING. FROST WILL CONTINUE TO FORM AT SOME LOCATIONS, MAINLY IN THE SUBURBS AND IN RURAL AREAS, UNTIL THE SUN RISES. BEING THAT THE GROWING SEASON IS UNDERWAY, THE NATIONAL WEATHER SERVICE HAS CONTINUED THE FROST ADVISORY FOR EARLY THIS MORNING. A FROST ADVISORY MEANS THAT AREAS OF FROST ARE EXPECTED. SENSITIVE OUTDOOR PLANTS MAY BE DAMAGED IF LEFT OUTDOORS AND UNPROTECTED. $$ IOVINO
000 WWUS71 KPHI 211158 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 758 AM EDT SAT APR 21 2007 DEZ001>003-MDZ008-012-015-019-020-NJZ016>019-021-022-027-211300- /O.EXP.KPHI.FR.Y.0001.000000T0000Z-070421T1200Z/ NEW CASTLE-KENT DE-INLAND SUSSEX-CECIL-KENT MD-QUEEN ANNES- TALBOT-CAROLINE-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON- CUMBERLAND-ATLANTIC-SOUTHEASTERN BURLINGTON- INCLUDING THE CITIES OF...WILMINGTON...DOVER...GEORGETOWN... ELKTON...CHESTERTOWN...CENTREVILLE...EASTON...DENTON... PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN... MOUNT HOLLY...MILLVILLE...HAMMONTON...WHARTON STATE FOREST 758 AM EDT SAT APR 21 2007 ...FROST ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING... SUNNY AND WARM CONDITIONS ARE EXPECTED TODAY. THE THREAT OF FROST HAS PASSED. IT APPEARS THAT TEMPERATURES THIS UPCOMING NIGHT WILL NOT BE COLD ENOUGH FOR FROST. $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 9:48 PM EDT | Coastal Flood Advisory | PHI | Cecil, Kent, Queen Anne's, Talbot | 4 hr |
| Apr 19, 9:48 PM EDT | Coastal Flood Warning | PHI | Burlington, Camden, Gloucester | 8 hr |
Nearby
Frost Advisories in New Jersey, 2007Frost Advisories in Maryland, 2007Frost Advisories in Delaware, 2007Every frost 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.