Alert archive / Pennsylvania / Frost Advisories in 2013

Frost Advisory 9, NWS Philadelphia/Mount Holly

September 17, 2013Carbon County, Monroe County, Northampton County, Pennsylvania; Sussex County, Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this frost advisory at Sep 17, 2013, 3:16 AM EDT for Carbon County, Monroe County, Northampton County, Pennsylvania; Sussex County, Warren County, New Jersey. It took effect at Sep 18, 2013, 2:00 AM EDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Sep 17, 2013, 3:16 AM EDT (07:16 UTC)
In effect from
Sep 18, 2013, 2:00 AM EDT
Expired
Sep 18, 2013, 8:00 AM EDT
In force
6 hr
Issued by
NWS Philadelphia/Mount Holly

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

The radar

The Philadelphia radar (KDIX), 130 km from the middle of the area, began a volume at 07:21 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, 7.3 hours before the alert went out and 197 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 2013-09-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 14 joules per kilogram.LCLLFCEL10008507005003002001001 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 2013-09-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -108 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
14 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
1218 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
-108 m²/s²
0-3 km storm-relative helicity
-51 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.

055 
WWUS71 KPHI 170716
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
316 AM EDT TUE SEP 17 2013

NJZ001-007-PAZ054-055-062-172100-
/O.NEW.KPHI.FR.Y.0009.130918T0600Z-130918T1300Z/
SUSSEX-WARREN-CARBON-MONROE-NORTHAMPTON-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...JIM THORPE...
STROUDSBURG...BETHLEHEM...EASTON
316 AM EDT TUE SEP 17 2013

...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM EDT WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A FROST
ADVISORY...WHICH IS IN EFFECT FROM 2 AM TO 9 AM EDT WEDNESDAY.

* TEMPERATURES...IN THE MID TO LOWER 30S.

* TIMING...LATE TUESDAY NIGHT INTO WEDNESDAY MORNING.

* IMPACTS...POTENTIAL DAMAGE TO SENSITIVE PLANTS AND VEGETATION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
3 follow-up statements
104 
WWUS71 KPHI 171916
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
316 PM EDT TUE SEP 17 2013

...AREAS OF FROST LATE TONIGHT AND EARLY WEDNESDAY...

.A STRONG AREA OF HIGH PRESSURE WILL CONTINUE TO SETTLE OVER OUR
REGION LATE TONIGHT. A CLEAR SKY, VERY DRY AIR AND LIGHT TO CALM
WINDS ASSOCIATED WITH THIS HIGH WILL SET THE STAGE FOR FROST
FORMATION.

NJZ001-007-PAZ054-055-062-180900-
/O.CON.KPHI.FR.Y.0009.130918T0600Z-130918T1300Z/
SUSSEX-WARREN-CARBON-MONROE-NORTHAMPTON-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...JIM THORPE...
STROUDSBURG...BETHLEHEM...EASTON
316 PM EDT TUE SEP 17 2013

...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM EDT
WEDNESDAY...

* TEMPERATURES...DROPPING TO THE MID 30S TOWARD DAYBREAK.

* IMPACTS...POTENTIAL DAMAGE TO SENSITIVE PLANTS AND VEGETATION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THOSE WITH AGRICULTURAL OR GARDENING INTERESTS SHOULD PROTECT
SENSITIVE CROPS AND VEGETATION. POTTED PLANTS NORMALLY LEFT
OUTSIDE SHOULD BE COVERED OR MOVED INDOORS.

&&

$$

GORSE/MEOLA
043 
WWUS71 KPHI 180745
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
345 AM EDT WED SEP 18 2013
 
NJZ001-007-PAZ054-055-062-181200-
/O.EXT.KPHI.FR.Y.0009.000000T0000Z-130918T1200Z/
SUSSEX-WARREN-CARBON-MONROE-NORTHAMPTON-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...JIM THORPE...
STROUDSBURG...BETHLEHEM...EASTON
345 AM EDT WED SEP 18 2013

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

* TEMPERATURES...SOME MID TO UPPER 30S EARLY THIS MORNING.

* IMPACTS...POTENTIAL DAMAGE TO SENSITIVE PLANTS AND VEGETATION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THOSE WITH AGRICULTURAL OR GARDENING INTERESTS SHOULD PROTECT
SENSITIVE CROPS AND VEGETATION. POTTED PLANTS NORMALLY LEFT
OUTSIDE SHOULD BE ALREADY COVERED OR MOVED INDOORS.

&&

$$
095 
WWUS71 KPHI 181211
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
811 AM EDT WED SEP 18 2013

NJZ001-007-PAZ054-055-062-181315-
/O.EXP.KPHI.FR.Y.0009.000000T0000Z-130918T1200Z/
SUSSEX-WARREN-CARBON-MONROE-NORTHAMPTON-
INCLUDING THE CITIES OF...NEWTON...WASHINGTON...JIM THORPE...
STROUDSBURG...BETHLEHEM...EASTON
811 AM EDT WED SEP 18 2013

...FROST ADVISORY HAS EXPIRED...

TEMPERATURES HAVE RISEN INTO THE 40S AND WILL CONTINUE TO RISE
STEADILY THROUGH THE DAY. THEREFORE THE FROST ADVISORY WAS ALLOWED
TO EXPIRE.

$$

ROBERTSON

Nearby

Frost Advisories in Pennsylvania, 2013Frost Advisories in New Jersey, 2013Every frost advisory in 2013

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.