Alert archive / New Jersey / Frost Advisories in 2024
Frost Advisory 3, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at Apr 21, 2024, 3:16 PM EDT for 16 counties in New Jersey; 7 counties in Pennsylvania; New Castle County, Delaware. It took effect at Apr 22, 2024, 2:00 AM EDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Apr 21, 2024, 3:16 PM EDT (19:16 UTC)
- In effect from
- Apr 22, 2024, 2:00 AM EDT
- Expired
- Apr 22, 2024, 9:00 AM EDT
- In force
- 7 hr
- Issued by
- NWS Philadelphia/Mount Holly
All 24 counties
New Castle County, DE, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 55 km from the middle of the area, began a volume at 19:18 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, 7.3 hours before the alert went out and 198 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
- 1523 m above ground
- 0-6 km bulk shear
- 82 kt
- 0-1 km storm-relative helicity
- -124 m²/s²
- 0-3 km storm-relative helicity
- 196 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
236 WWUS71 KPHI 211916 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 316 PM EDT Sun Apr 21 2024 NJZ001-007>009-PAZ060>062-101>103-105-221000- /O.NEW.KPHI.FR.Y.0003.240422T0600Z-240422T1300Z/ Sussex-Warren-Morris-Hunterdon-Berks-Lehigh-Northampton- Western Chester-Eastern Chester-Western Montgomery-Upper Bucks- Including the cities of Newton, Washington, Morristown, Flemington, Reading, Allentown, Bethlehem, Easton, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Chalfont, and Perkasie 316 PM EDT Sun Apr 21 2024 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM EDT MONDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of northern and northwest New Jersey and east central and southeast Pennsylvania. * WHEN...From 2 AM to 9 AM EDT Monday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ MPS
3 follow-up statements
784 WWUS71 KPHI 212257 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 657 PM EDT Sun Apr 21 2024 NJZ010-PAZ070-104-106-221200- /O.EXA.KPHI.FR.Y.0003.240422T0600Z-240422T1300Z/ Somerset-Delaware-Eastern Montgomery-Lower Bucks- Including the cities of Somerville, Media, Norristown, Lansdale, Morrisville, and Doylestown 657 PM EDT Sun Apr 21 2024 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM EDT MONDAY... * WHAT...Temperatures as low as 35 will result in frost formation. * WHERE...In New Jersey, Somerset. In Pennsylvania, Delaware, Eastern Montgomery and Lower Bucks. * WHEN...From 2 AM to 9 AM EDT Monday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ DEZ001-NJZ012-013-015>023-027-221200- /O.EXA.KPHI.FR.Y.0003.240422T0600Z-240422T1300Z/ New Castle-Middlesex-Western Monmouth-Mercer-Salem-Gloucester- Camden-Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Southeastern Burlington- Including the cities of Wilmington, New Brunswick, Freehold, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Cape May Court House, and Wharton State Forest 657 PM EDT Sun Apr 21 2024 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM EDT MONDAY... * WHAT...Temperatures as low as 36 will result in frost formation. * WHERE...Portions of northern Delaware and central, northern and southern New Jersey. * WHEN...From 2 AM to 9 AM EDT Monday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ NJZ001-007>009-PAZ060>062-101>103-105-221200- /O.CON.KPHI.FR.Y.0003.240422T0600Z-240422T1300Z/ Sussex-Warren-Morris-Hunterdon-Berks-Lehigh-Northampton- Western Chester-Eastern Chester-Western Montgomery-Upper Bucks- Including the cities of Newton, Washington, Morristown, Flemington, Reading, Allentown, Bethlehem, Easton, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Chalfont, and Perkasie 657 PM EDT Sun Apr 21 2024 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM EDT MONDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of northern and northwest New Jersey and east central and southeast Pennsylvania. * WHEN...From 2 AM to 9 AM EDT Monday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Wunderlin
033 WWUS71 KPHI 220723 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 323 AM EDT Mon Apr 22 2024 NJZ001-007>010-PAZ060>062-070-101>106-221300- /O.CON.KPHI.FR.Y.0003.000000T0000Z-240422T1300Z/ Sussex-Warren-Morris-Hunterdon-Somerset-Berks-Lehigh-Northampton- Delaware-Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Upper Bucks-Lower Bucks- Including the cities of Newton, Washington, Morristown, Flemington, Somerville, Reading, Allentown, Bethlehem, Easton, Media, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 323 AM EDT Mon Apr 22 2024 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Temperatures as low as 33 degrees will result in frost formation. * WHERE...Portions of northern and northwest New Jersey and east central and southeast Pennsylvania. * WHEN...Until 9 AM EDT this morning. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ DEZ001-NJZ012-013-015>023-027-221300- /O.CON.KPHI.FR.Y.0003.000000T0000Z-240422T1300Z/ New Castle-Middlesex-Western Monmouth-Mercer-Salem-Gloucester- Camden-Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Southeastern Burlington- Including the cities of Wilmington, New Brunswick, Freehold, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Cape May Court House, and Wharton State Forest 323 AM EDT Mon Apr 22 2024 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Temperatures as low as 34 degrees will result in frost formation. * WHERE...Portions of northern Delaware and central, northern and southern New Jersey. * WHEN...Until 9 AM EDT this morning. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
223 WWUS71 KPHI 221252 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 852 AM EDT Mon Apr 22 2024 NJZ001-007>010-PAZ060>062-070-101>106-221400- /O.EXP.KPHI.FR.Y.0003.000000T0000Z-240422T1300Z/ Sussex-Warren-Morris-Hunterdon-Somerset-Berks-Lehigh-Northampton- Delaware-Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Upper Bucks-Lower Bucks- Including the cities of Newton, Washington, Morristown, Flemington, Somerville, Reading, Allentown, Bethlehem, Easton, Media, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 852 AM EDT Mon Apr 22 2024 ...FROST ADVISORY WILL EXPIRE AT 9 AM EDT THIS MORNING... The Frost Advisory will be allowed to expire at 9 am. However, another frost advisory may be needed for portions of the area for later tonight into Tuesday morning. $$ DEZ001-NJZ012-013-015>023-027-221400- /O.EXP.KPHI.FR.Y.0003.000000T0000Z-240422T1300Z/ New Castle-Middlesex-Western Monmouth-Mercer-Salem-Gloucester- Camden-Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Southeastern Burlington- Including the cities of Wilmington, New Brunswick, Freehold, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Cape May Court House, and Wharton State Forest 852 AM EDT Mon Apr 22 2024 ...FROST ADVISORY WILL EXPIRE AT 9 AM EDT THIS MORNING... The Frost Advisory will be allowed to expire at 9 am. However, another frost advisory may be needed for portions of the area for later tonight into Tuesday morning. $$
Nearby
Frost Advisories in New Jersey, 2024Frost Advisories in Pennsylvania, 2024Frost Advisories in Delaware, 2024Every frost advisory in 2024
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.