Alert archive / New Jersey / Frost Advisories in 2023
Frost Advisory 3, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at Apr 8, 2023, 3:31 AM EDT for 4 states. It took effect at Apr 9, 2023, 2:00 AM EDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Apr 8, 2023, 3:31 AM EDT (07:31 UTC)
- In effect from
- Apr 9, 2023, 2:00 AM EDT
- Expired
- Apr 9, 2023, 8:55 AM EDT
- In force
- 7 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Camden County, NJ, Cape May County, NJ, Gloucester County, NJ, Salem County, NJ, Delaware County, PA, Philadelphia County, PA
The radar
The Dover AFB radar (KDOX), 57 km from the middle of the area, began a volume at 07:32 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
Wallops Is Stn, VA (KWAL), launched 00:00Z, 7.5 hours before the alert went out and 157 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
- 1300 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- -269 m²/s²
- 0-3 km storm-relative helicity
- -392 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
708 WWUS71 KPHI 080731 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 331 AM EDT Sat Apr 8 2023 NJZ012-013-015-019>022-027-PAZ060-101>104-106-082045- /O.UPG.KPHI.FZ.A.0001.230409T0600Z-230409T1400Z/ /O.NEW.KPHI.FZ.W.0002.230409T0600Z-230409T1400Z/ Middlesex-Western Monmouth-Mercer-Northwestern Burlington-Ocean- Cumberland-Atlantic-Southeastern Burlington-Berks-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Lower Bucks- Including the cities of New Brunswick, Freehold, Trenton, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Wharton State Forest, Reading, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Morrisville, and Doylestown 331 AM EDT Sat Apr 8 2023 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 10 AM EDT SUNDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Portions of central, northern and southern New Jersey and east central and southeast Pennsylvania. * WHEN...From 2 AM to 10 AM EDT Sunday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ DEZ001-MDZ012-015-019-020-NJZ016>018-023-PAZ070-071-082045- /O.NEW.KPHI.FR.Y.0003.230409T0600Z-230409T1400Z/ New Castle-Kent MD-Queen Annes-Talbot-Caroline-Salem-Gloucester- Camden-Cape May-Delaware-Philadelphia- Including the cities of Wilmington, Chestertown, Centreville, Easton, Denton, Pennsville, Glassboro, Camden, Cherry Hill, Cape May Court House, Media, and Philadelphia 331 AM EDT Sat Apr 8 2023 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 10 AM EDT SUNDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Portions of northern Delaware, northeast Maryland, southern New Jersey and southeast Pennsylvania. * WHEN...From 2 AM to 10 AM EDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Brudy
4 follow-up statements
115 WWUS71 KPHI 081650 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 1250 PM EDT Sat Apr 8 2023 NJZ012-013-015-019>022-027-PAZ060-101>104-106-090600- /O.CON.KPHI.FZ.W.0002.230409T0600Z-230409T1400Z/ Middlesex-Western Monmouth-Mercer-Northwestern Burlington-Ocean- Cumberland-Atlantic-Southeastern Burlington-Berks-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Lower Bucks- Including the cities of New Brunswick, Freehold, Trenton, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Wharton State Forest, Reading, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Morrisville, and Doylestown 1250 PM EDT Sat Apr 8 2023 ...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 10 AM EDT SUNDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Portions of central, northern, and southern New Jersey and east central and southeastern Pennsylvania. * WHEN...From 2 AM to 10 AM EDT Sunday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ DEZ002-003-090600- /O.EXA.KPHI.FR.Y.0003.230409T0600Z-230409T1400Z/ Kent-Inland Sussex- Including the cities of Dover and Georgetown 1250 PM EDT Sat Apr 8 2023 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 10 AM EDT SUNDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Kent and Inland Sussex. * WHEN...From 2 AM to 10 AM EDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS... PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ DEZ001-MDZ012-015-019-020-NJZ016>018-023-PAZ070-071-090600- /O.CON.KPHI.FR.Y.0003.230409T0600Z-230409T1400Z/ New Castle-Kent MD-Queen Annes-Talbot-Caroline-Salem-Gloucester- Camden-Cape May-Delaware-Philadelphia- Including the cities of Wilmington, Chestertown, Centreville, Easton, Denton, Pennsville, Glassboro, Camden, Cherry Hill, Cape May Court House, Media, and Philadelphia 1250 PM EDT Sat Apr 8 2023 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 10 AM EDT SUNDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Portions of northern Delaware, northeastern Maryland, southern New Jersey and southeastern Pennsylvania. * WHEN...From 2 AM to 10 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. && $$
465 WWUS71 KPHI 082222 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 622 PM EDT Sat Apr 8 2023 NJZ016-091400- /O.UPG.KPHI.FR.Y.0003.230409T0600Z-230409T1400Z/ /O.EXA.KPHI.FZ.W.0002.230409T0600Z-230409T1400Z/ Salem- Including the city of Pennsville 622 PM EDT Sat Apr 8 2023 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 10 AM EDT SUNDAY... * WHAT...Sub-freezing temperatures as low as 31 expected. * WHERE...Salem. * WHEN...From 2 AM to 10 AM EDT Sunday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. * ADDITIONAL DETAILS...Sunday night is also forecast to experience widespread frost and freeze conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ NJZ012-013-015-019>022-027-PAZ060-101>104-106-091400- /O.CON.KPHI.FZ.W.0002.230409T0600Z-230409T1400Z/ Middlesex-Western Monmouth-Mercer-Northwestern Burlington-Ocean- Cumberland-Atlantic-Southeastern Burlington-Berks-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Lower Bucks- Including the cities of New Brunswick, Freehold, Trenton, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Wharton State Forest, Reading, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Morrisville, and Doylestown 622 PM EDT Sat Apr 8 2023 ...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 10 AM EDT SUNDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Portions of central, northern and southern New Jersey and east central and southeast Pennsylvania. * WHEN...From 2 AM to 10 AM EDT Sunday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. * ADDITIONAL DETAILS...Sunday night is also forecast to experience widespread frost and freeze conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ DEZ001>003-MDZ012-015-019-020-NJZ017-018-023-PAZ070-071-091400- /O.CON.KPHI.FR.Y.0003.230409T0600Z-230409T1400Z/ New Castle-Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline- Gloucester-Camden-Cape May-Delaware-Philadelphia- Including the cities of Wilmington, Dover, Georgetown, Chestertown, Centreville, Easton, Denton, Glassboro, Camden, Cherry Hill, Cape May Court House, Media, and Philadelphia 622 PM EDT Sat Apr 8 2023 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 10 AM EDT SUNDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Portions of central, northern and southern Delaware, northeast Maryland, southern New Jersey and southeast Pennsylvania. * WHEN...From 2 AM to 10 AM EDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS...Sunday night is also forecast to experience widespread frost conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Staarmann
654 WWUS71 KPHI 090736 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 336 AM EDT Sun Apr 9 2023 NJZ012-013-015-016-019>022-027-PAZ060-101>104-106-091400- /O.CON.KPHI.FZ.W.0002.000000T0000Z-230409T1400Z/ Middlesex-Western Monmouth-Mercer-Salem-Northwestern Burlington- Ocean-Cumberland-Atlantic-Southeastern Burlington-Berks- Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Lower Bucks- Including the cities of New Brunswick, Freehold, Trenton, Pennsville, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Wharton State Forest, Reading, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Morrisville, and Doylestown 336 AM EDT Sun Apr 9 2023 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 10 AM EDT THIS MORNING... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Portions of central, northern and southern New Jersey and east central and southeast Pennsylvania. * WHEN...Until 10 AM EDT this morning. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. * ADDITIONAL DETAILS...Sunday night is also forecast to experience widespread frost and freeze conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ DEZ001>003-MDZ012-015-019-020-NJZ017-018-023-PAZ070-071-091400- /O.CON.KPHI.FR.Y.0003.000000T0000Z-230409T1400Z/ New Castle-Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline- Gloucester-Camden-Cape May-Delaware-Philadelphia- Including the cities of Wilmington, Dover, Georgetown, Chestertown, Centreville, Easton, Denton, Glassboro, Camden, Cherry Hill, Cape May Court House, Media, and Philadelphia 336 AM EDT Sun Apr 9 2023 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 10 AM EDT THIS MORNING... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Portions of central, northern and southern Delaware, northeast Maryland, southern New Jersey and southeast Pennsylvania. * WHEN...Until 10 AM EDT this morning. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS...Sunday night is also forecast to experience widespread frost conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Brudy
789 WWUS71 KPHI 091255 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 855 AM EDT Sun Apr 9 2023 NJZ012-013-015-016-019>022-027-PAZ060-101>104-106-091400- /O.CAN.KPHI.FZ.W.0002.000000T0000Z-230409T1400Z/ Middlesex-Western Monmouth-Mercer-Salem-Northwestern Burlington- Ocean-Cumberland-Atlantic-Southeastern Burlington-Berks- Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Lower Bucks- Including the cities of New Brunswick, Freehold, Trenton, Pennsville, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Wharton State Forest, Reading, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Morrisville, and Doylestown 855 AM EDT Sun Apr 9 2023 ...FREEZE WARNING IS CANCELLED... Temperatures have risen above freezing this morning. As a result, the current Freeze Warning has been cancelled. $$ DEZ001>003-MDZ012-015-019-020-NJZ017-018-023-PAZ070-071-091400- /O.CAN.KPHI.FR.Y.0003.000000T0000Z-230409T1400Z/ New Castle-Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline- Gloucester-Camden-Cape May-Delaware-Philadelphia- Including the cities of Wilmington, Dover, Georgetown, Chestertown, Centreville, Easton, Denton, Glassboro, Camden, Cherry Hill, Cape May Court House, Media, and Philadelphia 855 AM EDT Sun Apr 9 2023 ...FROST ADVISORY IS CANCELLED... Temperatures were rising into the 40s this morning. As a result, the current Frost Advisory has been cancelled. $$ Iovino
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 8:09 PM EDT | Freeze Watch | PHI | Atlantic, Burlington, Cumberland, Mercer, Middlesex, Monmouth and 1 more | 7 hr |
| Apr 8, 3:31 AM EDT | Freeze Warning | PHI | Atlantic, Burlington, Cumberland, Mercer, Middlesex, Monmouth and 2 more | 29 hr |
| Apr 8, 3:34 PM EDT | Small Craft Advisory | PHI | 48 hr |
Nearby
Frost Advisories in New Jersey, 2023Frost Advisories in Maryland, 2023Frost Advisories in Delaware, 2023Every frost advisory in 2023
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.