Alert archive / Pennsylvania / Frost Advisories in 2008

Frost Advisory 4, NWS Philadelphia/Mount Holly

May 28, 2008Carbon County, Monroe County, Pennsylvania; Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this frost advisory at May 28, 2008, 8:07 PM EDT for Carbon County, Monroe County, Pennsylvania; Sussex County, New Jersey. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
May 28, 2008, 8:07 PM EDT (00:07 UTC)
Expired
May 29, 2008, 6:00 AM EDT
In force
10 hr
Issued by
NWS Philadelphia/Mount Holly

Counties Sussex County, NJ, Carbon County, PA, Monroe County, PA

The radar

The Philadelphia radar (KDIX), 140 km from the middle of the area, began a volume at 00:08 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, 0.1 hours before the alert went out and 201 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, Brookhaven, NY at 00:00Z on 2008-05-29Temperature 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, Brookhaven, NY at 00:00Z on 2008-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.1939587897Sfc1 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
1793 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
40 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 290007
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
807 PM EDT WED MAY 28 2008

NJZ001-PAZ054-055-290815-
/O.NEW.KPHI.FR.Y.0004.080529T0007Z-080529T1000Z/
SUSSEX-CARBON-MONROE-
INCLUDING THE CITIES OF...NEWTON...JIM THORPE...STROUDSBURG
807 PM EDT WED MAY 28 2008

...FROST ADVISORY IN EFFECT UNTIL 6 AM EDT THURSDAY...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A FROST
ADVISORY...WHICH IS IN EFFECT UNTIL 6 AM EDT THURSDAY. 

CLEAR SKIES COMBINED WITH LIGHT WINDS AND A VERY COOL AIRMASS IN
PLACE WILL ALLOW TEMPERATURES TO DROP TO THE MIDDLE AND UPPER 30S
BY SUNRISE. THIS WILL ALLOW AREAS OF FROST TO FORM, MAINLY IN THE
NORMALLY COLDER AREAS. HOWEVER, NOT ALL AREAS WILL SEE THE FROST.

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

$$

RNS
2 follow-up statements
000 
WWUS71 KPHI 290654
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
254 AM EDT THU MAY 29 2008

NJZ001-PAZ054-055-291000-
/O.CON.KPHI.FR.Y.0004.000000T0000Z-080529T1000Z/
SUSSEX-CARBON-MONROE-
INCLUDING THE CITIES OF...NEWTON...JIM THORPE...STROUDSBURG
254 AM EDT THU MAY 29 2008

...FROST ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT EARLY THIS
MORNING...

A FROST ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT EARLY THIS
MORNING. 

CLEAR SKIES COMBINED WITH LIGHT WINDS AND A VERY COOL AIRMASS IN
PLACE HAVE PERMITTED SOME TEMPERATURES TO DROP TO THE MIDDLE AND
UPPER 30S. THIS WILL ALLOW AREAS OF FROST TO FORM...MAINLY IN THE
NORMALLY COLDER AREAS.

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

$$
000 
WWUS71 KPHI 291008
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
608 AM EDT THU MAY 29 2008

NJZ001-PAZ054-055-291115-
/O.EXP.KPHI.FR.Y.0004.000000T0000Z-080529T1000Z/
SUSSEX-CARBON-MONROE-
INCLUDING THE CITIES OF...NEWTON...JIM THORPE...STROUDSBURG
608 AM EDT THU MAY 29 2008

...FROST ADVISORY HAS EXPIRED...

THE FROST ADVISORY IS NO LONGER IN EFFECT. 

WHILE SOME FROST DID OCCUR THIS MORNING, TEMPERATURES ARE NOW
RISING AND THE THREAT OF KILLING FROST HAS ENDED.

$$

RPW

Nearby

Frost Advisories in Pennsylvania, 2008Frost Advisories in New Jersey, 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.