Alert archive / Maryland / Freeze Warnings in 2021
Freeze Warning 7, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this freeze warning at Nov 4, 2021, 10:06 AM EDT for 4 counties in Maryland; 4 counties in New Jersey; Kent County, Sussex County, Delaware. It took effect at Nov 4, 2021, 11:00 PM EDT. It was in force for 10 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Nov 4, 2021, 10:06 AM EDT (14:06 UTC)
- In effect from
- Nov 4, 2021, 11:00 PM EDT
- Expired
- Nov 5, 2021, 9:00 AM EDT
- In force
- 10 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Cape May County, NJ, Cumberland County, NJ, Salem County, NJ
The radar
The Dover AFB radar (KDOX), 32 km from the middle of the area, began a volume at 13:50 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, 2.1 hours before the alert went out and 132 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
- 1409 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
729 WWUS71 KPHI 041406 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 1006 AM EDT Thu Nov 4 2021 DEZ002-003-MDZ012-015-019-020-NJZ016-021>023-050315- /O.NEW.KPHI.FZ.W.0007.211105T0300Z-211105T1300Z/ Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline-Salem- Cumberland-Atlantic-Cape May- Including the cities of Dover, Georgetown, Chestertown, Centreville, Easton, Denton, Pennsville, Millville, Hammonton, and Cape May Court House 1006 AM EDT Thu Nov 4 2021 ...FREEZE WARNING IN EFFECT FROM 11 PM THIS EVENING TO 9 AM EDT FRIDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...In New Jersey, Salem, Cumberland, Atlantic and Cape May. In Maryland, Kent MD, Queen Annes, Talbot and Caroline. In Delaware, Kent and Inland Sussex. * WHEN...From 11 PM this evening to 9 AM EDT Friday. * 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. && $$ Johnson
3 follow-up statements
940 WWUS71 KPHI 050311 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 1111 PM EDT Thu Nov 4 2021 DEZ002-003-MDZ012-015-019-020-NJZ016-021>023-051300- /O.CON.KPHI.FZ.W.0007.000000T0000Z-211105T1300Z/ Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline-Salem- Cumberland-Atlantic-Cape May- Including the cities of Dover, Georgetown, Chestertown, Centreville, Easton, Denton, Pennsville, Millville, Hammonton, and Cape May Court House 1111 PM EDT Thu Nov 4 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT FRIDAY... * WHAT...Sub-freezing temperatures as low as 30. * WHERE...In New Jersey, Atlantic, Cape May, Salem and Cumberland. In Maryland, Talbot, Queen Annes, Kent MD and Caroline. In Delaware, Inland Sussex and Kent. * WHEN...Until 9 AM EDT Friday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ MPS
585 WWUS71 KPHI 050716 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 316 AM EDT Fri Nov 5 2021 DEZ002-003-MDZ012-015-019-020-NJZ016-021>023-051300- /O.CON.KPHI.FZ.W.0007.000000T0000Z-211105T1300Z/ Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline-Salem- Cumberland-Atlantic-Cape May- Including the cities of Dover, Georgetown, Chestertown, Centreville, Easton, Denton, Pennsville, Millville, Hammonton, and Cape May Court House 316 AM EDT Fri Nov 5 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Sub-freezing temperatures as low as 30. * WHERE...In New Jersey, Atlantic, Cape May, Salem and Cumberland. In Maryland, Talbot, Queen Annes, Kent MD and Caroline. In Delaware, Inland Sussex and Kent. * WHEN...Until 9 AM EDT this morning. * 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. && $$ MPS
692 WWUS71 KPHI 051251 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 851 AM EDT Fri Nov 5 2021 DEZ002-003-MDZ012-015-019-020-NJZ016-021>023-051400- /O.EXP.KPHI.FZ.W.0007.000000T0000Z-211105T1300Z/ Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline-Salem- Cumberland-Atlantic-Cape May- Including the cities of Dover, Georgetown, Chestertown, Centreville, Easton, Denton, Pennsville, Millville, Hammonton, and Cape May Court House 851 AM EDT Fri Nov 5 2021 ...FREEZE WARNING WILL EXPIRE AT 9 AM EDT THIS MORNING... Temperatures will continue to rise this morning. Thus, the freeze warning will be allowed to expire. In many locations the growing season ended with the freeze this morning. $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 4, 7:55 PM EDT | Coastal Flood Advisory | PHI | Cape May | 16 hr |
Nearby
Freeze Warnings in Maryland, 2021Freeze Warnings in New Jersey, 2021Freeze Warnings in Delaware, 2021Every freeze warning 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.