Alert archive / New Jersey / Frost Advisories in 2024
Frost Advisory 2, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at Apr 20, 2024, 9:37 AM EDT for Sussex County, Warren County, New Jersey. It took effect at Apr 21, 2024, 2:00 AM EDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Apr 20, 2024, 9:37 AM EDT (13:37 UTC)
- In effect from
- Apr 21, 2024, 2:00 AM EDT
- Expired
- Apr 21, 2024, 8:00 AM EDT
- In force
- 6 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Sussex County, NJ, Warren County, NJ
The radar
The Philadelphia radar (KDIX), 123 km from the middle of the area, began a volume at 13:38 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, 1.6 hours before the alert went out and 167 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
- 508 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 128 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
217 WWUS71 KPHI 201337 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 937 AM EDT Sat Apr 20 2024 NJZ001-007-210245- /O.NEW.KPHI.FR.Y.0002.240421T0600Z-240421T1200Z/ Sussex-Warren- Including the cities of Newton and Washington 937 AM EDT Sat Apr 20 2024 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM EDT SUNDAY... * WHAT...Temperatures in the low to mid 30s will result in frost formation. * WHERE...Sussex and Warren. * WHEN...From 2 AM to 8 AM EDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS...If high clouds come in earlier or thicker than forecast, temperatures may end up slightly milder and limit the frost potential. If not, frost advisories may be needed for additional counties in northwest New Jersey to the Lehigh Valley in Pennsylvania. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
3 follow-up statements
592 WWUS71 KPHI 201922 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 322 PM EDT Sat Apr 20 2024 NJZ001-007-210830- /O.CON.KPHI.FR.Y.0002.240421T0600Z-240421T1200Z/ Sussex-Warren- Including the cities of Newton and Washington 322 PM EDT Sat Apr 20 2024 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 8 AM EDT SUNDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Sussex and Warren Counties in New Jersey. * WHEN...From 2 AM to 8 AM EDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Johnson
228 WWUS71 KPHI 210735 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 335 AM EDT Sun Apr 21 2024 NJZ001-007-211200- /O.CON.KPHI.FR.Y.0002.000000T0000Z-240421T1200Z/ Sussex-Warren- Including the cities of Newton and Washington 335 AM EDT Sun Apr 21 2024 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... * WHAT...Temperatures as low as 34 degrees may result in patchy frost formation. * WHERE...Sussex and Warren. * WHEN...Until 8 AM EDT this morning. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS...Any frost development that occurs will mainly be confined to more sheltered locations where wind speeds are lower. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ DeSilva
730 WWUS71 KPHI 211151 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 751 AM EDT Sun Apr 21 2024 NJZ001-007-211300- /O.EXP.KPHI.FR.Y.0002.000000T0000Z-240421T1200Z/ Sussex-Warren- Including the cities of Newton and Washington 751 AM EDT Sun Apr 21 2024 ...FROST ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING... Temperatures continue to rise into the 40s. Therefore, the Frost Advisory will expire at 8 am. $$ MPS
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 3:07 AM EDT | Marine Dense Fog Advisory | PHI | 7 hr |
Nearby
Frost Advisories in New Jersey, 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.