Alert archive / Maryland / Snow Advisories in 2007

Snow Advisory 3, NWS Philadelphia/Mount Holly

February 6, 2007Kent County, Sussex County, Delaware; Cape May County, Cumberland County, New Jersey; 4 counties in Maryland

NWS Philadelphia/Mount Holly issued this snow advisory at Feb 6, 2007, 3:30 PM EST for Kent County, Sussex County, Delaware; Cape May County, Cumberland County, New Jersey; 4 counties in Maryland. It took effect at Feb 7, 2007, 12:00 AM EST. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Feb 6, 2007, 3:30 PM EST (20:30 UTC)
In effect from
Feb 7, 2007, 12:00 AM EST
Expired
Feb 7, 2007, 7:00 AM EST
In force
7 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, Cape May County, NJ, Cumberland County, NJ

The radar

The Dover AFB radar (KDOX), 26 km from the middle of the area, began a volume at 20:34 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.5 hours before the alert went out and 65 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.

Skew-T log-pSkew-T log-p diagram, Phillips Aaf/Abe, MD at 12:00Z on 2007-02-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2007-02-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -38 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1330 m above ground
0-6 km bulk shear
87 kt
0-1 km storm-relative helicity
-38 m²/s²
0-3 km storm-relative helicity
175 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS41 KPHI 062030
WSWPHI

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
330 PM EST TUE FEB 6 2007

DEZ002>004-MDZ012-015-019-020-NJZ021-023-024-071100-
/O.NEW.KPHI.SN.Y.0003.070207T0500Z-070207T1200Z/
KENT DE-INLAND SUSSEX-DELAWARE BEACHES-KENT MD-QUEEN ANNES-
TALBOT-CAROLINE-CUMBERLAND-CAPE MAY-ATLANTIC COASTAL CAPE MAY-
INCLUDING THE CITIES OF...DOVER...GEORGETOWN...REHOBOTH BEACH...
CHESTERTOWN...CENTREVILLE...EASTON...DENTON...MILLVILLE...
CAPE MAY COURT HOUSE...OCEAN CITY
330 PM EST TUE FEB 6 2007

...SNOW ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 7 AM EST
WEDNESDAY...

LOW PRESSURE, LOCATED OVER MISSOURI AT MID AFTERNOON, WILL RACE
TO THE EAST. THE LOW IS EXPECTED TO PASS OFF THE VIRGINIA COAST
LATE TONIGHT AND IT SHOULD BRING A PERIOD OF LIGHT SNOW TO PARTS
OF EASTERN MARYLAND, DELAWARE AND EXTREME SOUTHERN NEW JERSEY.
MOST OF THE SNOW IS EXPECTED TO FALL BETWEEN MIDNIGHT AND DAYBREAK
ON WEDNESDAY.

BEING THAT VERY COLD AIR REMAINS OVER THE REGION, IT WILL BE A
LIGHT FLUFFY SNOW. ACCUMULATIONS ARE EXPECTED TO RANGE BETWEEN ONE
AND TWO INCHES AT MOST LOCATIONS INCLUDED IN THE ADVISORY.

IF YOU WILL BE VENTURING OUT LATE TONIGHT OR EARLY ON WEDNESDAY
MORNING, BE PREPARED FOR SLIPPERY SPOTS ON UNTREATED ROADS AND
WALKWAYS.

$$

IOVINO
1 follow-up statement
000 
WWUS41 KPHI 070245
WSWPHI

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
945 PM EST TUE FEB 6 2007

DEZ002>004-MDZ012-015-019-020-NJZ021-023-024-071100-
/O.CON.KPHI.SN.Y.0003.070207T0500Z-070207T1200Z/
KENT DE-INLAND SUSSEX-DELAWARE BEACHES-KENT MD-QUEEN ANNES-
TALBOT-CAROLINE-CUMBERLAND-CAPE MAY-ATLANTIC COASTAL CAPE MAY-
INCLUDING THE CITIES OF...DOVER...GEORGETOWN...REHOBOTH BEACH...
CHESTERTOWN...CENTREVILLE...EASTON...DENTON...MILLVILLE...
CAPE MAY COURT HOUSE...OCEAN CITY
945 PM EST TUE FEB 6 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 7 AM EST WEDNESDAY...

LOW PRESSURE, LOCATED OVER EASTERN KENTUCKY THIS EVENING, WILL
PROGRESS TO THE EAST. THE LOW IS EXPECTED TO PASS OFF THE
VIRGINIA COAST LATE TONIGHT AND IT SHOULD BRING A PERIOD OF LIGHT
SNOW TO PARTS OF EASTERN MARYLAND, DELAWARE AND EXTREME SOUTHERN
NEW JERSEY. MOST OF THE SNOW IS EXPECTED TO FALL BETWEEN MIDNIGHT
AND DAYBREAK ON WEDNESDAY.

BEING THAT VERY COLD AIR REMAINS OVER THE REGION, IT WILL BE A
LIGHT FLUFFY SNOW. ACCUMULATIONS ARE EXPECTED TO RANGE BETWEEN ONE
AND TWO INCHES AT MOST LOCATIONS INCLUDED IN THE ADVISORY.

IF YOU WILL BE VENTURING OUT LATE TONIGHT OR EARLY ON WEDNESDAY
MORNING, BE PREPARED FOR SLIPPERY SPOTS ON UNTREATED ROADS AND
WALKWAYS.

$$

IOVINO

Nearby

Snow Advisories in Maryland, 2007Snow Advisories in Delaware, 2007Snow Advisories in New Jersey, 2007Every snow advisory in 2007

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.