Alert archive / Maryland / Frost Advisories in 2013
Frost Advisory 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at Apr 5, 2013, 5:20 PM EDT for 4 counties in Maryland; Kent County, Sussex County, Delaware. It took effect at Apr 6, 2013, 5:00 AM EDT. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Apr 5, 2013, 5:20 PM EDT (21:20 UTC)
- In effect from
- Apr 6, 2013, 5:00 AM EDT
- Expired
- Apr 6, 2013, 7:49 AM EDT
- In force
- 3 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 21:20 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, 9.3 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
- 566 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- -207 m²/s²
- 0-3 km storm-relative helicity
- 365 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
904 WWUS71 KPHI 052120 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 520 PM EDT FRI APR 5 2013 DEZ002-003-MDZ012-015-019-020-061200- /O.NEW.KPHI.FR.Y.0001.130406T0900Z-130406T1200Z/ KENT-INLAND SUSSEX-KENT MD-QUEEN ANNES-TALBOT-CAROLINE- INCLUDING THE CITIES OF...DOVER...GEORGETOWN...CHESTERTOWN... CENTREVILLE...EASTON...DENTON 520 PM EDT FRI APR 5 2013 ...FROST ADVISORY IN EFFECT FROM 5 AM TO 8 AM EDT SATURDAY... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A FROST ADVISORY FOR THE MORE SHELTERED AREAS OF THE CENTRAL DELMARVA... WHICH IS IN EFFECT FROM 5 AM TO 8 AM EDT SATURDAY. * TEMPERATURES...IN THE LOW TO MID 30S. * WINDS...BECOMING LIGHT OVER THE MORE SHELTERED AREAS. * IMPACTS...TENDER VEGETATION COULD BE DAMAGED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST OR NEAR-FREEZING TEMPERATURES ARE POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE DAMAGED IF LEFT UNCOVERED. && $$ MPD
1 follow-up statement
215 WWUS71 KPHI 061149 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 749 AM EDT SAT APR 6 2013 DEZ002-003-MDZ012-015-019-020-061300- /O.CAN.KPHI.FR.Y.0001.000000T0000Z-130406T1200Z/ KENT-INLAND SUSSEX-KENT MD-QUEEN ANNES-TALBOT-CAROLINE- INCLUDING THE CITIES OF...DOVER...GEORGETOWN...CHESTERTOWN... CENTREVILLE...EASTON...DENTON 749 AM EDT SAT APR 6 2013 ...FROST ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CANCELLED THE FROST ADVISORY. TEMPERATURES HAVE RISEN CLOSE TO 40 DEGREES THIS MORNING ALLOWING THE FROST ADVISORY TO BE CANCELLED. $$ HEAVENER
Nearby
Frost Advisories in Maryland, 2013Frost Advisories in Delaware, 2013Every frost advisory in 2013
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.