Alert archive / Maryland / Freeze Warnings in 2021
Freeze Warning 2, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this freeze warning at Apr 2, 2021, 8:46 AM EDT for 4 counties in Maryland; Kent County, Sussex County, Delaware. It took effect at Apr 2, 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
- Apr 2, 2021, 8:46 AM EDT (12:46 UTC)
- In effect from
- Apr 2, 2021, 11:00 PM EDT
- Expired
- Apr 3, 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
The radar
The Dover AFB radar (KDOX), 37 km from the middle of the area, began a volume at 12:48 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, 0.8 hours before the alert went out and 119 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
- 1071 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- -70 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
674 WWUS71 KPHI 021246 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 846 AM EDT Fri Apr 2 2021 DEZ002>004-MDZ012-015-019-020-030200- /O.CAN.KPHI.FZ.W.0001.000000T0000Z-210402T1400Z/ /O.NEW.KPHI.FZ.W.0002.210403T0300Z-210403T1300Z/ Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-Talbot- Caroline- Including the cities of Dover, Georgetown, Rehoboth Beach, Chestertown, Centreville, Easton, and Denton 846 AM EDT Fri Apr 2 2021 ...FREEZE WARNING IN EFFECT FROM 11 PM THIS EVENING TO 9 AM EDT SATURDAY... * WHAT...Sub-freezing temperatures as low as 27 expected. * WHERE...In Maryland, Kent MD, Queen Annes, Talbot and Caroline. In Delaware, Kent, Inland Sussex and Delaware Beaches. * WHEN...From 11 PM this evening to 9 AM EDT Saturday. * 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. && $$
3 follow-up statements
327 WWUS71 KPHI 021949 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 349 PM EDT Fri Apr 2 2021 DEZ002>004-MDZ012-015-019-020-030900- /O.CON.KPHI.FZ.W.0002.210403T0300Z-210403T1300Z/ Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-Talbot- Caroline- Including the cities of Dover, Georgetown, Rehoboth Beach, Chestertown, Centreville, Easton, and Denton 349 PM EDT Fri Apr 2 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 9 AM EDT SATURDAY... * WHAT...Sub-freezing temperatures as low as 27 expected. * WHERE...In Maryland, Talbot, Kent MD, Queen Annes and Caroline. In Delaware, Delaware Beaches, Inland Sussex and Kent. * WHEN...From 11 PM this evening to 9 AM EDT Saturday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
755 WWUS71 KPHI 030743 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 343 AM EDT Sat Apr 3 2021 DEZ002>004-MDZ012-015-019-020-031300- /O.CON.KPHI.FZ.W.0002.000000T0000Z-210403T1300Z/ Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-Talbot- Caroline- Including the cities of Dover, Georgetown, Rehoboth Beach, Chestertown, Centreville, Easton, and Denton 343 AM EDT Sat Apr 3 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Sub-freezing temperatures as low as 26. * WHERE...In Maryland, Talbot, Kent MD, Queen Annes and Caroline. In Delaware, Delaware Beaches, 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. && $$ Staarmann
543 WWUS71 KPHI 031253 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 853 AM EDT Sat Apr 3 2021 DEZ002>004-MDZ012-015-019-020-031400- /O.EXP.KPHI.FZ.W.0002.000000T0000Z-210403T1300Z/ Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-Talbot- Caroline- Including the cities of Dover, Georgetown, Rehoboth Beach, Chestertown, Centreville, Easton, and Denton 853 AM EDT Sat Apr 3 2021 ...FREEZE WARNING WILL EXPIRE AT 9 AM EDT THIS MORNING... Temperatures have warmed above freezing. Therefore, the freeze warning will be allowed to expire as scheduled. $$ CMS
Nearby
Freeze Warnings in Maryland, 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.