Alert archive / Pennsylvania / Frost Advisories in 2026
Frost Advisory 5, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at May 2, 2026, 12:42 PM EDT for 4 counties in New Jersey; 6 counties in Pennsylvania. It took effect at May 2, 2026, 11:00 PM EDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- May 2, 2026, 12:42 PM EDT (16:42 UTC)
- In effect from
- May 2, 2026, 11:00 PM EDT
- Expired
- May 3, 2026, 6:27 AM EDT
- In force
- 7 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Hunterdon County, NJ, Morris County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 98 km from the middle of the area, began a volume at 16:45 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, 4.7 hours before the alert went out and 201 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
- 769 m above ground
- 0-6 km bulk shear
- 84 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 290 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
160 WWUS71 KPHI 021642 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 1242 PM EDT Sat May 2 2026 PAZ054-055-031300- /O.UPG.KPHI.FZ.A.0004.260503T0300Z-260503T1300Z/ /O.NEW.KPHI.FZ.W.0005.260503T0300Z-260503T1300Z/ Carbon-Monroe- Including the cities of Jim Thorpe and Stroudsburg 1242 PM EDT Sat May 2 2026 ...FREEZE WARNING IN EFFECT FROM 11 PM THIS EVENING TO 9 AM EDT SUNDAY... * WHAT...Sub-freezing temperatures as low as 28 expected. * WHERE...Carbon and Monroe Counties. * WHEN...From 11 PM this evening to 9 AM EDT Sunday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ NJZ001-007>009-PAZ060>062-101-103-105-031300- /O.NEW.KPHI.FR.Y.0005.260503T0300Z-260503T1300Z/ Sussex-Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Oxford, Chalfont, Perkasie, Flemington, Newton, Allentown, Pottstown, Collegeville, Honey Brook, Bethlehem, Washington, Reading, Morristown, and Easton 1242 PM EDT Sat May 2 2026 ...FROST ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 9 AM EDT SUNDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...In New Jersey, Morris, Sussex, Warren, and Hunterdon Counties. In Pennsylvania, Berks, Lehigh, Northampton, Upper Bucks, Western Chester, and Western Montgomery Counties. * WHEN...From 11 PM this evening to 9 AM EDT Sunday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ RCM
3 follow-up statements
152 WWUS71 KPHI 022123 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 523 PM EDT Sat May 2 2026 PAZ054-055-031300- /O.CON.KPHI.FZ.W.0005.260503T0300Z-260503T1300Z/ Carbon-Monroe- Including the cities of Jim Thorpe and Stroudsburg 523 PM EDT Sat May 2 2026 ...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 9 AM EDT SUNDAY... * WHAT...Sub-freezing temperatures as low as 28 expected. * WHERE...Carbon and Monroe Counties. * WHEN...From 11 PM this evening to 9 AM EDT Sunday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ NJZ001-007>009-PAZ060>062-101-103-105-031300- /O.CON.KPHI.FR.Y.0005.260503T0300Z-260503T1300Z/ Sussex-Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Allentown, Flemington, Bethlehem, Oxford, Chalfont, Pottstown, Honey Brook, Easton, Morristown, Newton, Perkasie, Collegeville, Reading, and Washington 523 PM EDT Sat May 2 2026 ...FROST ADVISORY REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 9 AM EDT SUNDAY... * WHAT...Temperatures as low as 32 to 37 will result in frost formation. * WHERE...In New Jersey, Morris, Sussex, Warren, and Hunterdon Counties. In Pennsylvania, Berks, Lehigh, Northampton, Upper Bucks, Western Chester, and Western Montgomery Counties. * WHEN...From 11 PM this evening to 9 AM EDT Sunday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS...The extent of frost development overnight and early Sunday morning will depend on cloud cover and if the wind becomes light enough to even calm at the surface. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ RCM/Gorse
767 WWUS71 KPHI 030531 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 131 AM EDT Sun May 3 2026 PAZ054-055-031300- /O.CON.KPHI.FZ.W.0005.000000T0000Z-260503T1300Z/ Carbon-Monroe- Including the cities of Stroudsburg and Jim Thorpe 131 AM EDT Sun May 3 2026 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Carbon and Monroe Counties. * WHEN...Until 9 AM EDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ NJZ001-007>009-PAZ060>062-101-103-105-031300- /O.CON.KPHI.FR.Y.0005.000000T0000Z-260503T1300Z/ Sussex-Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Washington, Honey Brook, Allentown, Collegeville, Pottstown, Newton, Oxford, Perkasie, Easton, Reading, Chalfont, Morristown, Bethlehem, and Flemington 131 AM EDT Sun May 3 2026 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Temperatures as low as 32 to 37 will result in frost formation. * WHERE...In New Jersey, Morris, Sussex, Warren, and Hunterdon Counties. In Pennsylvania, Berks, Lehigh, Northampton, Upper Bucks, Western Chester, and Western Montgomery Counties. * WHEN...Until 9 AM EDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ MPS
894 WWUS71 KPHI 031027 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 627 AM EDT Sun May 3 2026 PAZ054-055-031130- /O.CAN.KPHI.FZ.W.0005.000000T0000Z-260503T1300Z/ Carbon-Monroe- Including the cities of Stroudsburg and Jim Thorpe 627 AM EDT Sun May 3 2026 ...FREEZE WARNING IS CANCELLED... Temperatures are above freezing and will continue to rise. Therefore, the Freeze Warning is no longer in effect. $$ NJZ001-007>009-PAZ060>062-101-103-105-031130- /O.CAN.KPHI.FR.Y.0005.000000T0000Z-260503T1300Z/ Sussex-Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Washington, Honey Brook, Allentown, Collegeville, Pottstown, Newton, Oxford, Perkasie, Easton, Reading, Chalfont, Morristown, Bethlehem, and Flemington 627 AM EDT Sun May 3 2026 ...FROST ADVISORY IS CANCELLED... Due to cloudy skies, elevated winds, and temperatures mainly in the 40s, the threat for frost has diminished. Therefore, the Frost Advisory is no longer in effect. $$ MPS
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 2, 12:42 PM EDT | Freeze Warning | PHI | Carbon, Monroe | 18 hr |
Nearby
Frost Advisories in Pennsylvania, 2026Frost Advisories in New Jersey, 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.