Alert archive / New Jersey / Frost Advisories in 2022

Frost Advisory 8, NWS Philadelphia/Mount Holly

October 29, 20224 counties in New Jersey; Bucks County, Montgomery County, Pennsylvania; Kent County, Maryland

NWS Philadelphia/Mount Holly issued this frost advisory at Oct 29, 2022, 3:16 PM EDT for 4 counties in New Jersey; Bucks County, Montgomery County, Pennsylvania; Kent County, Maryland. It took effect at Oct 30, 2022, 2:00 AM EDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Oct 29, 2022, 3:16 PM EDT (19:16 UTC)
In effect from
Oct 30, 2022, 2:00 AM EDT
Expired
Oct 30, 2022, 8:00 AM EDT
In force
6 hr
Issued by
NWS Philadelphia/Mount Holly

Counties Kent County, MD, Burlington County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Bucks County, PA, Montgomery County, PA

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.3 hours before the alert went out and 194 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 2022-10-29Temperature 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 12:00Z on 2022-10-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -42 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
1045 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
-42 m²/s²
0-3 km storm-relative helicity
-5 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

263 
WWUS71 KPHI 291916
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
316 PM EDT Sat Oct 29 2022

NJZ012-013-015-019-PAZ104-106-301000-
/O.NEW.KPHI.FR.Y.0008.221030T0600Z-221030T1200Z/
Middlesex-Western Monmouth-Mercer-Northwestern Burlington-
Eastern Montgomery-Lower Bucks-
Including the cities of New Brunswick, Freehold, Trenton, 
Moorestown, Mount Holly, Norristown, Lansdale, Morrisville, 
and Doylestown
316 PM EDT Sat Oct 29 2022

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

* WHAT...Temperatures as low as 33 will result in frost 
  formation.

* WHERE...In New Jersey, Middlesex, Western Monmouth, Mercer and 
  Northwestern Burlington. In Pennsylvania, Eastern Montgomery 
  and Lower Bucks.

* WHEN...From 2 AM to 8 AM EDT Sunday.

* IMPACTS...Frost could kill sensitive outdoor vegetation if 
  left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

MPS
2 follow-up statements
626 
WWUS71 KPHI 300115
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
915 PM EDT Sat Oct 29 2022

MDZ012-301200-
/O.EXA.KPHI.FR.Y.0008.221030T0600Z-221030T1200Z/
Kent MD-
Including the city of Chestertown
915 PM EDT Sat Oct 29 2022

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

* WHAT...Temperatures as low as 35 will result in frost 
  formation.

* WHERE...Kent MD.

* WHEN...From 2 AM to 8 AM EDT Sunday.

* IMPACTS...Frost could kill sensitive outdoor vegetation if left
  uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

NJZ012-013-015-019-PAZ104-106-301200-
/O.CON.KPHI.FR.Y.0008.221030T0600Z-221030T1200Z/
Middlesex-Western Monmouth-Mercer-Northwestern Burlington-
Eastern Montgomery-Lower Bucks-
Including the cities of New Brunswick, Freehold, Trenton, 
Moorestown, Mount Holly, Norristown, Lansdale, Morrisville, 
and Doylestown
915 PM EDT Sat Oct 29 2022

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

* WHAT...Temperatures as low as 32 will result in frost 
  formation.

* WHERE...In New Jersey, Middlesex, Western Monmouth, Mercer and 
  Northwestern Burlington. In Pennsylvania, Eastern Montgomery 
  and Lower Bucks.

* WHEN...From 2 AM to 8 AM EDT Sunday.

* IMPACTS...Frost could kill sensitive outdoor vegetation if 
  left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

Johnson
318 
WWUS71 KPHI 301202
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
802 AM EDT Sun Oct 30 2022

MDZ012-NJZ012-013-015-019-PAZ104-106-301315-
/O.EXP.KPHI.FR.Y.0008.000000T0000Z-221030T1200Z/
Kent MD-Middlesex-Western Monmouth-Mercer-Northwestern Burlington-
Eastern Montgomery-Lower Bucks-
Including the cities of Chestertown, New Brunswick, Freehold, 
Trenton, Moorestown, Mount Holly, Norristown, Lansdale, 
Morrisville, and Doylestown
802 AM EDT Sun Oct 30 2022

...FROST ADVISORY HAS EXPIRED...

Temperatures continue to rise above freezing and frost is
dissipating.

$$

Hoeflich

Nearby

Frost Advisories in New Jersey, 2022Frost Advisories in Pennsylvania, 2022Frost Advisories in Maryland, 2022Every frost advisory in 2022

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.