Alert archive / New Jersey / Frost Advisories in 2020
Frost Advisory 11, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at Oct 17, 2020, 3:46 AM EDT for 4 states. It took effect at Oct 18, 2020, 1:00 AM EDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Oct 17, 2020, 3:46 AM EDT (07:46 UTC)
- In effect from
- Oct 18, 2020, 1:00 AM EDT
- Expired
- Oct 18, 2020, 8:00 AM EDT
- In force
- 7 hr
- Issued by
- NWS Philadelphia/Mount Holly
All 29 counties
Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, 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, 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), 69 km from the middle of the area, began a volume at 07:45 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
Washington/Dulle, VA (KIAD), launched 00:00Z, 7.8 hours before the alert went out and 213 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
- 1374 m above ground
- 0-6 km bulk shear
- 81 kt
- 0-1 km storm-relative helicity
- -160 m²/s²
- 0-3 km storm-relative helicity
- -28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
397 WWUS71 KPHI 170746 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 346 AM EDT Sat Oct 17 2020 NJZ007>010-PAZ060>062-103-105-172115- /O.NEW.KPHI.FR.Y.0011.201018T0500Z-201018T1200Z/ Warren-Morris-Hunterdon-Somerset-Berks-Lehigh-Northampton- Western Montgomery-Upper Bucks- Including the cities of Washington, Morristown, Flemington, Somerville, Reading, Allentown, Bethlehem, Easton, Collegeville, Pottstown, Chalfont, and Perkasie 346 AM EDT Sat Oct 17 2020 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 8 AM EDT SUNDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...In New Jersey, Warren, Morris, Hunterdon and Somerset. In Pennsylvania, Berks, Lehigh, Northampton, Western Montgomery and Upper Bucks. * WHEN...From 1 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. && $$ NJZ020>022-027-172115- /O.NEW.KPHI.FR.Y.0011.201018T0500Z-201018T1200Z/ Ocean-Cumberland-Atlantic-Southeastern Burlington- Including the cities of Jackson, Millville, Hammonton, and Wharton State Forest 346 AM EDT Sat Oct 17 2020 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 8 AM EDT SUNDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Ocean, Cumberland, Atlantic and Southeastern Burlington. * WHEN...From 1 AM to 8 AM EDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Meola
3 follow-up statements
118 WWUS71 KPHI 171826 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 226 PM EDT Sat Oct 17 2020 PAZ101-180730- /O.EXA.KPHI.FR.Y.0011.201018T0500Z-201018T1200Z/ Western Chester- Including the cities of Honey Brook and Oxford 226 PM EDT Sat Oct 17 2020 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 8 AM EDT SUNDAY... * WHAT...Temperatures as low as 35 will result in frost formation. * WHERE...Western Chester. * WHEN...From 1 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. && $$ NJZ007>010-PAZ060>062-103-105-180730- /O.CON.KPHI.FR.Y.0011.201018T0500Z-201018T1200Z/ Warren-Morris-Hunterdon-Somerset-Berks-Lehigh-Northampton- Western Montgomery-Upper Bucks- Including the cities of Washington, Morristown, Flemington, Somerville, Reading, Allentown, Bethlehem, Easton, Collegeville, Pottstown, Chalfont, and Perkasie 226 PM EDT Sat Oct 17 2020 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 8 AM EDT SUNDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...In New Jersey, Morris, Hunterdon, Somerset and Warren. In Pennsylvania, Northampton, Lehigh, Berks, Upper Bucks and Western Montgomery. * WHEN...From 1 AM to 8 AM EDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ NJZ020>022-027-180730- /O.CON.KPHI.FR.Y.0011.201018T0500Z-201018T1200Z/ Ocean-Cumberland-Atlantic-Southeastern Burlington- Including the cities of Jackson, Millville, Hammonton, and Wharton State Forest 226 PM EDT Sat Oct 17 2020 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 8 AM EDT SUNDAY... * WHAT...Temperatures as low as 35 will result in frost formation. * WHERE...Southeastern Burlington, Atlantic, Ocean and Cumberland. * WHEN...From 1 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. && $$ Davis
240 WWUS71 KPHI 172217 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 617 PM EDT Sat Oct 17 2020 NJZ012-015-PAZ102-104-106-181200- /O.EXA.KPHI.FR.Y.0011.201018T0500Z-201018T1200Z/ Middlesex-Mercer-Eastern Chester-Eastern Montgomery-Lower Bucks- Including the cities of New Brunswick, Trenton, West Chester, Kennett Square, Norristown, Lansdale, Morrisville, and Doylestown 617 PM EDT Sat Oct 17 2020 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 8 AM EDT SUNDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...In New Jersey, Middlesex and Mercer. In Pennsylvania, Eastern Chester, Eastern Montgomery and Lower Bucks. * WHEN...From 1 AM to 8 AM EDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ DEZ001>003-MDZ008-012-015-019-020-NJZ013-016>019-023-181200- /O.EXA.KPHI.FR.Y.0011.201018T0500Z-201018T1200Z/ New Castle-Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot- Caroline-Western Monmouth-Salem-Gloucester-Camden- Northwestern Burlington-Cape May- Including the cities of Wilmington, Dover, Georgetown, Elkton, Chestertown, Centreville, Easton, Denton, Freehold, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, and Cape May Court House 617 PM EDT Sat Oct 17 2020 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 8 AM EDT SUNDAY... * WHAT...Temperatures as low as 35 will result in frost formation. * WHERE...Portions of central and southern New Jersey, northeast Maryland and central, northern and southern Delaware. * WHEN...From 1 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. && $$ NJZ007>010-PAZ060>062-101-103-105-181200- /O.CON.KPHI.FR.Y.0011.201018T0500Z-201018T1200Z/ Warren-Morris-Hunterdon-Somerset-Berks-Lehigh-Northampton- Western Chester-Western Montgomery-Upper Bucks- Including the cities of Washington, Morristown, Flemington, Somerville, Reading, Allentown, Bethlehem, Easton, Honey Brook, Oxford, Collegeville, Pottstown, Chalfont, and Perkasie 617 PM EDT Sat Oct 17 2020 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 8 AM EDT SUNDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...In New Jersey, Morris, Hunterdon, Somerset and Warren. In Pennsylvania, Northampton, Lehigh, Berks, Upper Bucks and Western Montgomery. * WHEN...From 1 AM to 8 AM EDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ NJZ020>022-027-181200- /O.CON.KPHI.FR.Y.0011.201018T0500Z-201018T1200Z/ Ocean-Cumberland-Atlantic-Southeastern Burlington- Including the cities of Jackson, Millville, Hammonton, and Wharton State Forest 617 PM EDT Sat Oct 17 2020 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 8 AM EDT SUNDAY... * WHAT...Temperatures as low as 35 will result in frost formation. * WHERE...Southeastern Burlington, Atlantic, Ocean and Cumberland. * WHEN...From 1 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. && $$
092 WWUS71 KPHI 181152 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 752 AM EDT Sun Oct 18 2020 NJZ007>010-012-015-PAZ060>062-101>106-181300- /O.EXP.KPHI.FR.Y.0011.000000T0000Z-201018T1200Z/ Warren-Morris-Hunterdon-Somerset-Middlesex-Mercer-Berks-Lehigh- Northampton-Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Upper Bucks-Lower Bucks- Including the cities of Washington, Morristown, Flemington, Somerville, New Brunswick, Trenton, Reading, Allentown, Bethlehem, Easton, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 752 AM EDT Sun Oct 18 2020 ...FROST ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING... Temperatures are beginning to rise above freezing and will continue to quickly climb this morning, so the Frost Advisory is no longer needed. $$ DEZ001>003-MDZ008-012-015-019-020-NJZ013-016>023-027-181300- /O.EXP.KPHI.FR.Y.0011.000000T0000Z-201018T1200Z/ New Castle-Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot- Caroline-Western Monmouth-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Southeastern Burlington- Including the cities of Wilmington, Dover, Georgetown, Elkton, Chestertown, Centreville, Easton, Denton, Freehold, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Cape May Court House, and Wharton State Forest 752 AM EDT Sun Oct 18 2020 ...FROST ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING... Temperatures are beginning to rise above freezing and will continue to quickly climb this morning, so the Frost Advisory is no longer needed. $$ Davis
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 17, 3:19 AM EDT | Coastal Flood Advisory | PHI | Atlantic, Burlington, Cape May, Monmouth, Ocean | 10 hr |
Nearby
Frost Advisories in New Jersey, 2020Frost Advisories in Pennsylvania, 2020Frost Advisories in Maryland, 2020Every frost advisory in 2020
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.