Alert archive / Pennsylvania / Freeze Watches in 2021
Freeze Watch 4, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this freeze watch at Nov 1, 2021, 2:25 PM EDT for 8 counties in Pennsylvania; 5 counties in New Jersey. It took effect at Nov 3, 2021, 12:00 AM EDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Nov 1, 2021, 2:25 PM EDT (18:25 UTC)
- In effect from
- Nov 3, 2021, 12:00 AM EDT
- Expired
- Nov 2, 2021, 3:30 AM EDT
- In force
- Issued by
- NWS Philadelphia/Mount Holly
Counties Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Carbon County, PA, Chester County, PA, Lehigh County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 103 km from the middle of the area, began a volume at 18:28 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, 6.4 hours before the alert went out and 200 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
- 983 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 205 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
918 WWUS71 KPHI 011825 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 225 PM EDT Mon Nov 1 2021 NJZ001-007>010-PAZ054-055-060>062-101>106-020900- /O.NEW.KPHI.FZ.A.0004.211103T0400Z-211103T1300Z/ Sussex-Warren-Morris-Hunterdon-Somerset-Carbon-Monroe-Berks- Lehigh-Northampton-Western Chester-Eastern Chester- Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks- Including the cities of Newton, Washington, Morristown, Flemington, Somerville, Jim Thorpe, Stroudsburg, Reading, Allentown, Bethlehem, Easton, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 225 PM EDT Mon Nov 1 2021 ...FREEZE WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH WEDNESDAY MORNING... * WHAT...Sub-freezing temperatures as low as 30 possible. * WHERE...Portions of northwest New Jersey and eastern Pennsylvania. * WHEN...From late Tuesday night through Wednesday morning. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take protective measures now as freezing temperatures could damage or kill tender plants and vegetation. Potted plants should be brought inside. && $$ Gorse
1 follow-up statement
913 WWUS71 KPHI 020730 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 330 AM EDT Tue Nov 2 2021 NJZ001-007>010-PAZ054-055-060>062-101>106-022300- /O.UPG.KPHI.FZ.A.0004.211103T0400Z-211103T1300Z/ /O.NEW.KPHI.FZ.W.0005.211103T0400Z-211103T1300Z/ Sussex-Warren-Morris-Hunterdon-Somerset-Carbon-Monroe-Berks- Lehigh-Northampton-Western Chester-Eastern Chester- Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks- Including the cities of Newton, Washington, Morristown, Flemington, Somerville, Jim Thorpe, Stroudsburg, Reading, Allentown, Bethlehem, Easton, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 330 AM EDT Tue Nov 2 2021 ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT WEDNESDAY... * WHAT...Sub-freezing temperatures as low as 29 expected. * WHERE...Portions of northern and northwest New Jersey and east central, northeast and southeast Pennsylvania. * WHEN...From midnight tonight to 9 AM EDT Wednesday. * IMPACTS...Freeze conditions will kill crops and other sensitive vegetation. * ADDITIONAL DETAILS...This will likely bring an end to the growing season. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ DEZ001-NJZ012-013-015>023-027-PAZ070-071-022300- /O.NEW.KPHI.FR.Y.0002.211103T0600Z-211103T1300Z/ New Castle-Middlesex-Western Monmouth-Mercer-Salem-Gloucester- Camden-Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Southeastern Burlington-Delaware-Philadelphia- Including the cities of Wilmington, New Brunswick, Freehold, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Cape May Court House, Wharton State Forest, Media, and Philadelphia 330 AM EDT Tue Nov 2 2021 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM EDT WEDNESDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of central, northern and southern New Jersey, southeast Pennsylvania and northern Delaware. * WHEN...From 2 AM to 9 AM EDT Wednesday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS...Temperatures in the urban areas will likely be in the upper 30s, while just outside of the Urban Corridor temperatures will be in the 33 to 36 degree range. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 31, 9:06 PM EDT | Coastal Flood Statement | PHI | Ocean | 8 hr |
Nearby
Freeze Watches in Pennsylvania, 2021Freeze Watches in New Jersey, 2021Every freeze watch in 2021
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.