Alert archive / New Jersey / Frost Advisories in 2008

Frost Advisory 3, NWS Philadelphia/Mount Holly

April 30, 20089 counties in New Jersey; 4 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this frost advisory at Apr 30, 2008, 3:15 PM EDT for 9 counties in New Jersey; 4 counties in Pennsylvania. It took effect at May 1, 2008, 2:00 AM EDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Apr 30, 2008, 3:15 PM EDT (19:15 UTC)
In effect from
May 1, 2008, 2:00 AM EDT
Expired
May 1, 2008, 8:00 AM EDT
In force
6 hr
Issued by
NWS Philadelphia/Mount Holly

Counties Atlantic County, NJ, Burlington County, NJ, Cumberland County, NJ, Hunterdon County, NJ, Morris County, NJ, Ocean County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 73 km from the middle of the area, began a volume at 19:16 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 147 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.

Skew-T log-pSkew-T log-p diagram, Phillips Aaf/Abe, MD at 12:00Z on 2008-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2008-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -77 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1626 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
-77 m²/s²
0-3 km storm-relative helicity
61 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS71 KPHI 301915
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
315 PM EDT WED APR 30 2008

NJZ001-007>010-020>022-027-PAZ054-055-061-062-011200-
/O.NEW.KPHI.FR.Y.0003.080501T0600Z-080501T1200Z/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-OCEAN-CUMBERLAND-ATLANTIC-
SOUTHEASTERN BURLINGTON-CARBON-MONROE-LEHIGH-NORTHAMPTON-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
FLEMINGTON...SOMERVILLE...JACKSON...MILLVILLE...HAMMONTON...
WHARTON STATE FOREST...JIM THORPE...STROUDSBURG...ALLENTOWN...
BETHLEHEM...EASTON
315 PM EDT WED APR 30 2008

...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM EDT THURSDAY...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A FROST
ADVISORY...WHICH IS IN EFFECT FROM 2 AM TO 8 AM EDT THURSDAY. 

AN UNSEASONABLY CHILLY AIR MASS WILL CONTINUE OVER THE REGION
TONIGHT. CLEAR SKIES AND LIGHT WINDS WILL DEVELOP OVER THE REGION
AND TEMPERATURES WILL DROP INTO THE LOWER TO MID 30S ACROSS MUCH
OF THE ADVISORY AREA. THIS WILL PERMIT FROST TO FORM ACROSS THE
REGION...ESPECIALLY IN THE MORE RURAL AND LOW- LYING AREAS.

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED.

$$

SZATKOWSKI
2 follow-up statements
000 
WWUS71 KPHI 010848
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
448 AM EDT THU MAY 1 2008

NJZ001-007>010-020>022-027-PAZ054-055-061-062-011200-
/O.CON.KPHI.FR.Y.0003.000000T0000Z-080501T1200Z/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-OCEAN-CUMBERLAND-ATLANTIC-
SOUTHEASTERN BURLINGTON-CARBON-MONROE-LEHIGH-NORTHAMPTON-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
FLEMINGTON...SOMERVILLE...JACKSON...MILLVILLE...HAMMONTON...
WHARTON STATE FOREST...JIM THORPE...STROUDSBURG...ALLENTOWN...
BETHLEHEM...EASTON
448 AM EDT THU MAY 1 2008

...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING...

AN UNSEASONABLY CHILLY AIR MASS WILL REMAIN OVER THE REGION
THROUGH EARLY THIS MORNING. LIGHT WINDS AND A MOSTLY CLEAR SKY WILL
ALLOW FOR TEMPERATURES TO DROP INTO THE LOWER TO MID 30S ACROSS
MUCH OF THE ADVISORY AREA. THIS WILL PERMIT FROST TO FORM ACROSS
THE REGION...ESPECIALLY IN THE MORE RURAL AND LOW- LYING AREAS.

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED.

$$
000 
WWUS71 KPHI 011157
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
757 AM EDT THU MAY 1 2008

...FROST ADVISORY WILL BE ALLOWED TO EXPIRE...


NJZ001-007>010-020>022-027-PAZ054-055-061-062-011300-
/O.EXP.KPHI.FR.Y.0003.000000T0000Z-080501T1200Z/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-OCEAN-CUMBERLAND-ATLANTIC-
SOUTHEASTERN BURLINGTON-CARBON-MONROE-LEHIGH-NORTHAMPTON-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN...
FLEMINGTON...SOMERVILLE...JACKSON...MILLVILLE...HAMMONTON...
WHARTON STATE FOREST...JIM THORPE...STROUDSBURG...ALLENTOWN...
BETHLEHEM...EASTON
757 AM EDT THU MAY 1 2008

...FROST ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING...

THE FROST ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING. 

TEMPERATURES HAVE RISEN ABOVE THE FREEZING MARK AND WILL CONTINUE
TO RISE THROUGH THE REST OF THE MORNING WITH FROST NO LONGER BEING
AN ISSUE. THEREFORE WE WILL ALLOW THE FROST ADVISORY TO EXPIRE.

$$

MEOLA

Nearby

Frost Advisories in New Jersey, 2008Frost Advisories in Pennsylvania, 2008Every frost advisory in 2008

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.