Alert archive / New Jersey / Frost Advisories in 2015

Frost Advisory 1, NWS Philadelphia/Mount Holly

April 11, 20154 counties in New Jersey; 4 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this frost advisory at Apr 11, 2015, 2:23 PM EDT for 4 counties in New Jersey; 4 counties in Pennsylvania. It took effect at Apr 12, 2015, 2:00 AM EDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Apr 11, 2015, 2:23 PM EDT (18:23 UTC)
In effect from
Apr 12, 2015, 2:00 AM EDT
Expired
Apr 12, 2015, 8:00 AM EDT
In force
6 hr
Issued by
NWS Philadelphia/Mount Holly

Counties Atlantic County, NJ, Burlington County, NJ, Cumberland County, NJ, Ocean County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Montgomery County, PA

The radar

The Philadelphia radar (KDIX), 59 km from the middle of the area, began a volume at 18:22 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 12:00Z, 6.4 hours before the alert went out and 216 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 12:00Z on 2015-04-11Temperature 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 12:00Z on 2015-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -50 square meters per square second.1939587897117136Sfc1 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
1503 m above ground
0-6 km bulk shear
88 kt
0-1 km storm-relative helicity
-50 m²/s²
0-3 km storm-relative helicity
133 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.

425 
WWUS71 KPHI 111823
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
223 PM EDT SAT APR 11 2015

NJZ020>022-027-PAZ060-101>104-106-121200-
/O.NEW.KPHI.FR.Y.0001.150412T0600Z-150412T1200Z/
OCEAN-CUMBERLAND-ATLANTIC-SOUTHEASTERN BURLINGTON-BERKS-
WESTERN CHESTER-EASTERN CHESTER-WESTERN MONTGOMERY-
EASTERN MONTGOMERY-LOWER BUCKS-
INCLUDING THE CITIES OF...JACKSON...MILLVILLE...HAMMONTON...
WHARTON STATE FOREST...READING...HONEY BROOK...OXFORD...
WEST CHESTER...KENNETT SQUARE...COLLEGEVILLE...POTTSTOWN...
NORRISTOWN...LANSDALE...MORRISVILLE...DOYLESTOWN
223 PM EDT SAT APR 11 2015

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

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

* TEMPERATURES...DROPPING TO AROUND 35 DEGREES EARLY SUNDAY
  MORNING.

* IMPACTS...POSSIBLE DAMAGE TO EARLY SEASON PLANTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY IS ISSUED WHEN WIDESPREAD FROST IS EXPECTED TO
DEVELOP DURING THE GROWING SEASON. THOSE WITH AGRICULTURAL OR
GARDENING INTERESTS IN THE ADVISORY AREA SHOULD PROTECT SENSITIVE
PLANTS. ANY POTTED PLANTS ALREADY PLACED OUTDOORS SHOULD BE
COVERED OR BROUGHT INSIDE.

&&

$$
2 follow-up statements
230 
WWUS71 KPHI 120751
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
351 AM EDT SUN APR 12 2015


NJZ020>022-027-PAZ060-101>104-106-121200-
/O.CON.KPHI.FR.Y.0001.000000T0000Z-150412T1200Z/
OCEAN-CUMBERLAND-ATLANTIC-SOUTHEASTERN BURLINGTON-BERKS-
WESTERN CHESTER-EASTERN CHESTER-WESTERN MONTGOMERY-
EASTERN MONTGOMERY-LOWER BUCKS-
INCLUDING THE CITIES OF...JACKSON...MILLVILLE...HAMMONTON...
WHARTON STATE FOREST...READING...HONEY BROOK...OXFORD...
WEST CHESTER...KENNETT SQUARE...COLLEGEVILLE...POTTSTOWN...
NORRISTOWN...LANSDALE...MORRISVILLE...DOYLESTOWN
351 AM EDT SUN APR 12 2015

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

* TEMPERATURES...IN THE MID 30S.

* IMPACTS...POSSIBLE DAMAGE TO EARLY SEASON PLANTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY IS ISSUED WHEN WIDESPREAD FROST IS EXPECTED TO
DEVELOP DURING THE GROWING SEASON. THOSE WITH AGRICULTURAL OR
GARDENING INTERESTS IN THE ADVISORY AREA SHOULD PROTECT SENSITIVE
PLANTS. ANY POTTED PLANTS ALREADY PLACED OUTDOORS SHOULD BE
COVERED OR BROUGHT INSIDE.

&&

$$
471 
WWUS71 KPHI 121152
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
752 AM EDT SUN APR 12 2015

NJZ020>022-027-PAZ060-101>104-106-121300-
/O.EXP.KPHI.FR.Y.0001.000000T0000Z-150412T1200Z/
OCEAN-CUMBERLAND-ATLANTIC-SOUTHEASTERN BURLINGTON-BERKS-
WESTERN CHESTER-EASTERN CHESTER-WESTERN MONTGOMERY-
EASTERN MONTGOMERY-LOWER BUCKS-
INCLUDING THE CITIES OF...JACKSON...MILLVILLE...HAMMONTON...
WHARTON STATE FOREST...READING...HONEY BROOK...OXFORD...
WEST CHESTER...KENNETT SQUARE...COLLEGEVILLE...POTTSTOWN...
NORRISTOWN...LANSDALE...MORRISVILLE...DOYLESTOWN
752 AM EDT SUN APR 12 2015

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

THE TEMPERATURES WILL CONTINUE TO INCREASE THIS MORNING WITH AMPLE
SUNSHINE, THEREFORE THE FROST ADVISORY WILL BE ALLOWED TO EXPIRE.

$$

GORSE

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 11, 10:16 AM EDTSmall Craft AdvisoryPHI8 hr

Nearby

Frost Advisories in New Jersey, 2015Frost Advisories in Pennsylvania, 2015Every frost advisory in 2015

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.