Alert archive / Maryland / Dense Fog Advisories in 2012
Dense Fog Advisory 13, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this dense fog advisory at Dec 9, 2012, 4:23 AM EST for 5 counties in Maryland; Cape May County, Cumberland County, Salem County, New Jersey; Kent County, New Castle County, Sussex County, Delaware. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Dec 9, 2012, 4:23 AM EST (09:23 UTC)
- Expired
- Dec 9, 2012, 9:31 AM EST
- In force
- 5 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 nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 9.4 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
- 909 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
612 WWUS71 KPHI 090923 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 423 AM EST SUN DEC 9 2012 DEZ001>004-MDZ008-012-015-019-020-NJZ016-021-023-024-091500- /O.NEW.KPHI.FG.Y.0013.121209T0923Z-121209T1500Z/ NEW CASTLE-KENT-INLAND SUSSEX-DELAWARE BEACHES-CECIL-KENT MD- QUEEN ANNES-TALBOT-CAROLINE-SALEM-CUMBERLAND-CAPE MAY- ATLANTIC COASTAL CAPE MAY- INCLUDING THE CITIES OF...WILMINGTON...DOVER...GEORGETOWN... REHOBOTH BEACH...ELKTON...CHESTERTOWN...CENTREVILLE...EASTON... DENTON...PENNSVILLE...MILLVILLE...CAPE MAY COURT HOUSE... OCEAN CITY 423 AM EST SUN DEC 9 2012 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM EST THIS MORNING... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A DENSE FOG ADVISORY...WHICH IS IN EFFECT UNTIL 10 AM EST THIS MORNING. * TIMING...THE DENSE FOG IS EXPECTED TO LAST INTO MID MORNING HOURS. * IMPACTS...DENSE FOG IS EXPECTED TO IMPACT TRAVEL AND INCREASE TRAVEL TIMES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN...USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$
1 follow-up statement
751 WWUS71 KPHI 091431 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 931 AM EST SUN DEC 9 2012 DEZ001>004-MDZ008-012-015-019-020-NJZ016-021-023-024-091545- /O.CAN.KPHI.FG.Y.0013.000000T0000Z-121209T1500Z/ NEW CASTLE-KENT-INLAND SUSSEX-DELAWARE BEACHES-CECIL-KENT MD- QUEEN ANNES-TALBOT-CAROLINE-SALEM-CUMBERLAND-CAPE MAY- ATLANTIC COASTAL CAPE MAY- INCLUDING THE CITIES OF...WILMINGTON...DOVER...GEORGETOWN... REHOBOTH BEACH...ELKTON...CHESTERTOWN...CENTREVILLE...EASTON... DENTON...PENNSVILLE...MILLVILLE...CAPE MAY COURT HOUSE... OCEAN CITY 931 AM EST SUN DEC 9 2012 ...DENSE FOG ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CANCELLED THE DENSE FOG ADVISORY. VISIBILITIES HAVE IMPROVED TO ABOVE ONE MILE IN MOST AREAS AS THE RAIN HAS MOVED INTO THE REGION. $$ HEAVENER
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 9, 3:16 AM EST | Small Craft Advisory | PHI | 56 hr |
Nearby
Dense Fog Advisories in Maryland, 2012Dense Fog Advisories in New Jersey, 2012Dense Fog Advisories in Delaware, 2012Every dense fog advisory in 2012
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.