Alert archive / Maryland / Freeze Watches in 2021
Freeze Watch 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this freeze watch at Mar 31, 2021, 3:46 PM EDT for 4 counties in Maryland; Kent County, Sussex County, Delaware. It took effect at Apr 2, 2021, 2:00 AM EDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Mar 31, 2021, 3:46 PM EDT (19:46 UTC)
- In effect from
- Apr 2, 2021, 2:00 AM EDT
- Expired
- Apr 1, 2021, 3:14 AM EDT
- In force
- 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 19:50 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, 7.8 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
- 940 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 134 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
533 WWUS71 KPHI 311946 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 346 PM EDT Wed Mar 31 2021 DEZ002>004-MDZ012-015-019-020-010900- /O.NEW.KPHI.FZ.A.0001.210402T0600Z-210402T1400Z/ Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-Talbot- Caroline- Including the cities of Dover, Georgetown, Rehoboth Beach, Chestertown, Centreville, Easton, and Denton 346 PM EDT Wed Mar 31 2021 ...FREEZE WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY MORNING... * WHAT...Sub-freezing temperatures as low as 29 possible. * WHERE...In Maryland, Kent MD, Queen Annes, Talbot and Caroline. In Delaware, Kent, Inland Sussex and Delaware Beaches. * WHEN...From late Thursday night through Friday morning. * IMPACTS...Frost and freeze conditions will likely impact crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
1 follow-up statement
584 WWUS71 KPHI 010714 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 314 AM EDT Thu Apr 1 2021 DEZ002>004-MDZ012-015-019-020-012015- /O.UPG.KPHI.FZ.A.0001.210402T0600Z-210402T1400Z/ /O.NEW.KPHI.FZ.W.0001.210402T0600Z-210402T1400Z/ Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-Talbot- Caroline- Including the cities of Dover, Georgetown, Rehoboth Beach, Chestertown, Centreville, Easton, and Denton 314 AM EDT Thu Apr 1 2021 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 10 AM EDT FRIDAY... * WHAT...Sub-freezing temperatures as low as 29 expected. * WHERE...In Maryland, Kent MD, Queen Annes, Talbot and Caroline. In Delaware, Kent, Inland Sussex and Delaware Beaches. * WHEN...From 2 AM to 10 AM EDT Friday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. * ADDITIONAL DETAILS...Another widespread freeze is possible Friday night into Saturday morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Johnson
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 3:50 PM EDT | Areal Flood Advisory | PHI | New Castle | 3 hr |
Nearby
Freeze Watches in Maryland, 2021Freeze Watches in Delaware, 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.