Alert archive / Maryland / Frost Advisories in 2020
Frost Advisory 12, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at Oct 31, 2020, 7:51 PM EDT for Kent County, New Castle County, Sussex County, Delaware; Cape May County, Cumberland County, Salem County, New Jersey; 5 counties in Maryland. It was in force for 11 hr.
The area
The counties it named.
The facts
- Issued
- Oct 31, 2020, 7:51 PM EDT (23:51 UTC)
- Expired
- Nov 1, 2020, 6:20 AM EST
- In force
- 11 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Cape May County, NJ, Cumberland County, NJ, Salem County, NJ
The radar
The Dover AFB radar (KDOX), 41 km from the middle of the area, began a volume at 23:56 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, 11.9 hours before the alert went out and 139 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
- 1225 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- -40 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
604 WWUS71 KPHI 312351 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 751 PM EDT Sat Oct 31 2020 NJZ016-021-023-011300- /O.NEW.KPHI.FR.Y.0012.201031T2351Z-201101T1300Z/ Salem-Cumberland-Cape May- Including the cities of Pennsville, Millville, and Cape May Court House 751 PM EDT Sat Oct 31 2020 ...FROST ADVISORY IN EFFECT UNTIL 8 AM EST SUNDAY... * WHAT...Temperatures as low as 35 will result in frost formation. * WHERE...Salem, Cumberland and Cape May. * WHEN...Until 8 AM EST Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Staarmann
3 follow-up statements
843 WWUS71 KPHI 010021 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 821 PM EDT Sat Oct 31 2020 DEZ001>003-MDZ008-012-015-019-020-011300- /O.EXA.KPHI.FR.Y.0012.000000T0000Z-201101T1300Z/ New Castle-Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot- Caroline- Including the cities of Wilmington, Dover, Georgetown, Elkton, Chestertown, Centreville, Easton, and Denton 821 PM EDT Sat Oct 31 2020 ...FROST ADVISORY IN EFFECT UNTIL 8 AM EST SUNDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...In Maryland, Cecil, Kent MD, Queen Annes, Talbot and Caroline. In Delaware, New Castle, Kent and Inland Sussex. * WHEN...Until 8 AM EST Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ NJZ016-021-023-011300- /O.CON.KPHI.FR.Y.0012.000000T0000Z-201101T1300Z/ Salem-Cumberland-Cape May- Including the cities of Pennsville, Millville, and Cape May Court House 821 PM EDT Sat Oct 31 2020 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EST SUNDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Cumberland, Cape May and Salem. * WHEN...Until 8 AM EST Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Staarmann
841 WWUS71 KPHI 010810 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 310 AM EST Sun Nov 1 2020 DEZ004-NJZ014-024>026-011400- /O.NEW.KPHI.WI.Y.0013.201102T0900Z-201103T0000Z/ Delaware Beaches-Eastern Monmouth-Atlantic Coastal Cape May- Coastal Atlantic-Coastal Ocean- Including the cities of Rehoboth Beach, Sandy Hook, Ocean City, Atlantic City, and Long Beach Island 310 AM EST Sun Nov 1 2020 ...WIND ADVISORY IN EFFECT FROM 4 AM TO 7 PM EST MONDAY... * WHAT...West winds 25 to 35 mph with gusts up to 50 mph expected. * WHERE...In New Jersey, Eastern Monmouth, Atlantic Coastal Cape May, Coastal Atlantic and Coastal Ocean. In Delaware, Delaware Beaches. * WHEN...From 4 AM to 7 PM EST Monday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ DEZ001>003-MDZ008-012-015-019-020-NJZ016-021-023-011300- /O.CON.KPHI.FR.Y.0012.000000T0000Z-201101T1300Z/ New Castle-Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot- Caroline-Salem-Cumberland-Cape May- Including the cities of Wilmington, Dover, Georgetown, Elkton, Chestertown, Centreville, Easton, Denton, Pennsville, Millville, and Cape May Court House 310 AM EST Sun Nov 1 2020 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EST THIS MORNING... * WHAT...Temperatures as low as 39 will result in frost formation. * WHERE...Portions of southern New Jersey, northeast Maryland and central, northern and southern Delaware. * WHEN...Until 8 AM EST this morning. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Deal
679 WWUS71 KPHI 011120 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 620 AM EST Sun Nov 1 2020 DEZ001>003-MDZ008-012-015-019-020-NJZ016-021-023-011230- /O.CAN.KPHI.FR.Y.0012.000000T0000Z-201101T1300Z/ New Castle-Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot- Caroline-Salem-Cumberland-Cape May- Including the cities of Wilmington, Dover, Georgetown, Elkton, Chestertown, Centreville, Easton, Denton, Pennsville, Millville, and Cape May Court House 620 AM EST Sun Nov 1 2020 ...FROST ADVISORY IS CANCELLED... Temperatures have warmed enough above freezing to preclude any more concerns from frost. $$ DEZ004-NJZ014-024>026-020030- /O.CON.KPHI.WI.Y.0013.201102T0900Z-201103T0000Z/ Delaware Beaches-Eastern Monmouth-Atlantic Coastal Cape May- Coastal Atlantic-Coastal Ocean- Including the cities of Rehoboth Beach, Sandy Hook, Ocean City, Atlantic City, and Long Beach Island 620 AM EST Sun Nov 1 2020 ...WIND ADVISORY REMAINS IN EFFECT FROM 4 AM TO 7 PM EST MONDAY... * WHAT...West winds 25 to 35 mph with gusts up to 50 mph expected. * WHERE...In New Jersey, Coastal Ocean, Atlantic Coastal Cape May, Coastal Atlantic and Eastern Monmouth. In Delaware, Delaware Beaches. * WHEN...From 4 AM to 7 PM EST Monday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 31, 5:07 AM EDT | Coastal Flood Statement | PHI | Ocean | 11 hr |
| Oct 31, 3:45 PM EDT | Gale Warning | PHI | 70 hr | |
| Oct 31, 3:45 PM EDT | Small Craft Advisory | PHI | 27 hr |
Nearby
Frost Advisories in Maryland, 2020Frost Advisories in Delaware, 2020Frost Advisories in New Jersey, 2020Every frost advisory in 2020
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.