Alert archive / New Jersey / Frost Advisories in 2023
Frost Advisory 2, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at Apr 2, 2023, 11:40 AM EDT for 4 states. It took effect at Apr 3, 2023, 12:00 AM EDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Apr 2, 2023, 11:40 AM EDT (15:40 UTC)
- In effect from
- Apr 3, 2023, 12:00 AM EDT
- Expired
- Apr 3, 2023, 9:00 AM EDT
- In force
- 9 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, Atlantic County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Dover AFB radar (KDOX), 82 km from the middle of the area, began a volume at 15:44 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 12:00Z, 3.7 hours before the alert went out and 180 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
- 1284 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
328 WWUS71 KPHI 021540 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 1140 AM EDT Sun Apr 2 2023 NJZ015-019-027-PAZ060-103-106-031300- /O.NEW.KPHI.FZ.W.0001.230403T0400Z-230403T1300Z/ Mercer-Northwestern Burlington-Southeastern Burlington-Berks- Western Montgomery-Lower Bucks- Including the cities of Trenton, Moorestown, Mount Holly, Wharton State Forest, Reading, Collegeville, Pottstown, Morrisville, and Doylestown 1140 AM EDT Sun Apr 2 2023 ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT MONDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...In New Jersey, Mercer, Northwestern Burlington and Southeastern Burlington. In Pennsylvania, Berks, Western Montgomery and Lower Bucks. * WHEN...From midnight tonight to 9 AM EDT Monday. * 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. && $$ DEZ001>003-MDZ012-015-019-020-NJZ012-013-016>018-020>023-PAZ070- 071-101-102-104-031300- /O.NEW.KPHI.FR.Y.0002.230403T0400Z-230403T1300Z/ New Castle-Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline- Middlesex-Western Monmouth-Salem-Gloucester-Camden-Ocean- Cumberland-Atlantic-Cape May-Delaware-Philadelphia- Western Chester-Eastern Chester-Eastern Montgomery- Including the cities of Wilmington, Dover, Georgetown, Chestertown, Centreville, Easton, Denton, New Brunswick, Freehold, Pennsville, Glassboro, Camden, Cherry Hill, Jackson, Millville, Hammonton, Cape May Court House, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Norristown, and Lansdale 1140 AM EDT Sun Apr 2 2023 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT MONDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of central, northern and southern Delaware, northeast Maryland, central, northern and southern New Jersey and southeast Pennsylvania. * WHEN...From midnight tonight to 9 AM EDT Monday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
1 follow-up statement
405 WWUS71 KPHI 031241 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 841 AM EDT Mon Apr 3 2023 NJZ015-019-027-PAZ060-103-106-031345- /O.EXP.KPHI.FZ.W.0001.000000T0000Z-230403T1300Z/ Mercer-Northwestern Burlington-Southeastern Burlington-Berks- Western Montgomery-Lower Bucks- Including the cities of Trenton, Moorestown, Mount Holly, Wharton State Forest, Reading, Collegeville, Pottstown, Morrisville, and Doylestown 841 AM EDT Mon Apr 3 2023 ...FREEZE WARNING WILL EXPIRE AT 9 AM EDT THIS MORNING... Temperatures are warming up. $$ DEZ001>003-MDZ012-015-019-020-NJZ012-013-016>018-020>023-PAZ070- 071-101-102-104-031345- /O.EXP.KPHI.FR.Y.0002.000000T0000Z-230403T1300Z/ New Castle-Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline- Middlesex-Western Monmouth-Salem-Gloucester-Camden-Ocean- Cumberland-Atlantic-Cape May-Delaware-Philadelphia- Western Chester-Eastern Chester-Eastern Montgomery- Including the cities of Wilmington, Dover, Georgetown, Chestertown, Centreville, Easton, Denton, New Brunswick, Freehold, Pennsville, Glassboro, Camden, Cherry Hill, Jackson, Millville, Hammonton, Cape May Court House, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Norristown, and Lansdale 841 AM EDT Mon Apr 3 2023 ...FROST ADVISORY WILL EXPIRE AT 9 AM EDT THIS MORNING... Temperatures are warming up. $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 1, 8:10 PM EDT | Special Marine Warning | PHI | 65 min | |
| Apr 2, 11:03 AM EDT | Small Craft Advisory | PHI | 7 hr | |
| Apr 2, 11:40 AM EDT | Freeze Warning | PHI | Burlington, Mercer | 21 hr |
| Apr 2, 6:01 PM EDT | Small Craft Advisory | PHI | 28 hr | |
| Apr 1, 8:28 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 47 min |
Nearby
Frost Advisories in New Jersey, 2023Frost Advisories in Pennsylvania, 2023Frost Advisories in Maryland, 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.