Alert archive / New Jersey / Frost Advisories in 2026
Frost Advisory 3, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at Apr 26, 2026, 2:38 AM EDT for 8 counties in New Jersey; 6 counties in Pennsylvania. It took effect at Apr 27, 2026, 12:00 AM EDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Apr 26, 2026, 2:38 AM EDT (06:38 UTC)
- In effect from
- Apr 27, 2026, 12:00 AM EDT
- Expired
- Apr 27, 2026, 8:00 AM EDT
- In force
- 8 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Atlantic County, NJ, Burlington County, NJ, Cumberland County, NJ, Hunterdon County, NJ, Mercer County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Bucks County, PA, Carbon County, PA, Chester County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 74 km from the middle of the area, began a volume at 06:42 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, 6.6 hours before the alert went out and 193 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
- 855 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -73 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
460 WWUS71 KPHI 260638 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 238 AM EDT Sun Apr 26 2026 NJZ001-007-009-PAZ054-055-062-105-262000- /O.NEW.KPHI.FR.Y.0003.260427T0400Z-260427T1200Z/ Sussex-Warren-Hunterdon-Carbon-Monroe-Northampton-Upper Bucks- Including the cities of Perkasie, Flemington, Newton, Chalfont, Bethlehem, Stroudsburg, Easton, Jim Thorpe, and Washington 238 AM EDT Sun Apr 26 2026 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM EDT MONDAY... * WHAT...Temperatures as low as 35 degrees will result in frost formation, especially in sheltered valleys. * WHERE...In New Jersey, Sussex, Warren, and Hunterdon Counties. In Pennsylvania, Northampton, Carbon, Monroe, and Upper Bucks Counties. * WHEN...From midnight tonight to 8 AM EDT Monday. * 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. && $$ Staarmann
3 follow-up statements
246 WWUS71 KPHI 261911 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 311 PM EDT Sun Apr 26 2026 NJZ010-015-019-021-022-027-PAZ101-103-270815- /O.EXA.KPHI.FR.Y.0003.260427T0400Z-260427T1200Z/ Somerset-Mercer-Northwestern Burlington-Cumberland-Atlantic- Southeastern Burlington-Western Chester-Western Montgomery- Including the cities of Hammonton, Oxford, Wharton State Forest, Pottstown, Moorestown, Trenton, Somerville, Millville, Collegeville, Mount Holly, and Honey Brook 311 PM EDT Sun Apr 26 2026 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM EDT MONDAY... * WHAT...Temperatures as low as 35 degrees will result in frost formation, especially in sheltered valleys. * WHERE...In New Jersey, Mercer, Somerset, Atlantic, Cumberland, Northwestern Burlington, and Southeastern Burlington Counties. In Pennsylvania, Western Chester and Western Montgomery Counties. * WHEN...From midnight tonight to 8 AM EDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ NJZ001-007-009-PAZ054-055-062-105-270815- /O.CON.KPHI.FR.Y.0003.260427T0400Z-260427T1200Z/ Sussex-Warren-Hunterdon-Carbon-Monroe-Northampton-Upper Bucks- Including the cities of Jim Thorpe, Flemington, Bethlehem, Perkasie, Chalfont, Washington, Easton, Newton, and Stroudsburg 311 PM EDT Sun Apr 26 2026 ...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM EDT MONDAY... * WHAT...Temperatures as low as 35 degrees will result in frost formation, especially in sheltered valleys. * WHERE...In New Jersey, Sussex, Warren, and Hunterdon Counties. In Pennsylvania, Northampton, Carbon, Monroe, and Upper Bucks Counties. * WHEN...From midnight tonight to 8 AM EDT Monday. * 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. && $$ AKL
002 WWUS71 KPHI 270712 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 312 AM EDT Mon Apr 27 2026 NJZ001-007-009-010-015-019-021-022-027-PAZ054-055-062-101-103-105- 271200- /O.CON.KPHI.FR.Y.0003.000000T0000Z-260427T1200Z/ Sussex-Warren-Hunterdon-Somerset-Mercer-Northwestern Burlington- Cumberland-Atlantic-Southeastern Burlington-Carbon-Monroe- Northampton-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Oxford, Millville, Collegeville, Flemington, Washington, Moorestown, Jim Thorpe, Stroudsburg, Mount Holly, Hammonton, Bethlehem, Easton, Wharton State Forest, Pottstown, Trenton, Perkasie, Honey Brook, Chalfont, Newton, and Somerville 312 AM EDT Mon Apr 27 2026 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... * WHAT...Temperatures as low as 35 degrees will result in frost formation, especially in sheltered valleys. * WHERE...Portions of eastern Pennsylvania and parts of New Jersey. * WHEN...Until 8 AM EDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ PO
469 WWUS71 KPHI 271202 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 802 AM EDT Mon Apr 27 2026 NJZ001-007-009-010-015-019-021-022-027-PAZ054-055-062-101-103-105- 271315- /O.EXP.KPHI.FR.Y.0003.000000T0000Z-260427T1200Z/ Sussex-Warren-Hunterdon-Somerset-Mercer-Northwestern Burlington- Cumberland-Atlantic-Southeastern Burlington-Carbon-Monroe- Northampton-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Millville, Pottstown, Hammonton, Oxford, Honey Brook, Trenton, Moorestown, Wharton State Forest, Jim Thorpe, Easton, Stroudsburg, Collegeville, Perkasie, Flemington, Washington, Somerville, Mount Holly, Chalfont, Bethlehem, and Newton 802 AM EDT Mon Apr 27 2026 ...FROST ADVISORY HAS EXPIRED... The threat has ended. $$ Robertson
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 2:54 PM EDT | Small Craft Advisory | PHI | 56 hr |
Nearby
Frost Advisories in New Jersey, 2026Frost Advisories in Pennsylvania, 2026Every frost advisory in 2026
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.