Alert archive / New Jersey / Frost Advisories in 2025
Frost Advisory 2, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at Apr 17, 2025, 5:32 PM EDT for 10 counties in New Jersey. It took effect at Apr 18, 2025, 12:00 AM EDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Apr 17, 2025, 5:32 PM EDT (21:32 UTC)
- In effect from
- Apr 18, 2025, 12:00 AM EDT
- Expired
- Apr 18, 2025, 6:32 AM EDT
- In force
- 7 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Salem County, NJ
The radar
The Philadelphia radar (KDIX), 30 km from the middle of the area, began a volume at 21:32 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, 9.5 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1178 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 182 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
008 WWUS71 KPHI 172132 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 532 PM EDT Thu Apr 17 2025 NJZ012-013-015>022-027-181200- /O.NEW.KPHI.FR.Y.0002.250418T0400Z-250418T1200Z/ Middlesex-Western Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Southeastern Burlington- Including the cities of Mount Holly, Trenton, Hammonton, Jackson, Millville, Wharton State Forest, Pennsville, Moorestown, Cherry Hill, Glassboro, Freehold, New Brunswick, and Camden 532 PM EDT Thu Apr 17 2025 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM EDT FRIDAY... * WHAT...Temperatures as low as 34 degrees will result in areas of frost formation. * WHERE...Portions of central, northern, and southern New Jersey. * WHEN...From midnight tonight to 8 AM EDT Friday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Staarmann
2 follow-up statements
481 WWUS71 KPHI 180635 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 235 AM EDT Fri Apr 18 2025 NJZ012-013-015>022-027-181200- /O.CON.KPHI.FR.Y.0002.000000T0000Z-250418T1200Z/ Middlesex-Western Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Southeastern Burlington- Including the cities of Cherry Hill, Trenton, New Brunswick, Glassboro, Camden, Pennsville, Moorestown, Millville, Wharton State Forest, Mount Holly, Hammonton, Freehold, and Jackson 235 AM EDT Fri Apr 18 2025 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Portions of New Jersey. * WHEN...Until 8 AM EDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ MPS
933 WWUS71 KPHI 181032 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 632 AM EDT Fri Apr 18 2025 NJZ012-013-015>022-027-181145- /O.CAN.KPHI.FR.Y.0002.000000T0000Z-250418T1200Z/ Middlesex-Western Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Southeastern Burlington- Including the cities of Cherry Hill, Trenton, New Brunswick, Glassboro, Camden, Pennsville, Moorestown, Millville, Wharton State Forest, Mount Holly, Hammonton, Freehold, and Jackson 632 AM EDT Fri Apr 18 2025 ...FROST ADVISORY IS CANCELLED... Any patchy frost will melt off this morning after sunrise and with temperatures rising into the 40s. $$ MPS
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 12:53 PM EDT | Small Craft Advisory | PHI | 65 hr |
Nearby
Frost Advisories in New Jersey, 2025Every frost advisory in 2025
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.