Alert archive / Maryland / Snow Advisories in 2007
Snow Advisory 6, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this snow advisory at Apr 6, 2007, 3:24 PM EDT for 4 counties in New Jersey; Kent County, New Castle County, Sussex County, Delaware; 5 counties in Maryland. It took effect at Apr 6, 2007, 9:46 PM EDT. It was in force for 11 hr.
The area
The counties it named.
The facts
- Issued
- Apr 6, 2007, 3:24 PM EDT (19:24 UTC)
- In effect from
- Apr 6, 2007, 9:46 PM EDT
- Expired
- Apr 7, 2007, 9:00 AM EDT
- In force
- 11 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, Atlantic County, NJ, Cape May County, NJ, Cumberland County, NJ, Salem County, NJ
The radar
The Dover AFB radar (KDOX), 42 km from the middle of the area, began a volume at 19:29 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, 7.4 hours before the alert went out and 57 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
- 6 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 1136 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS41 KPHI 061924 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 324 PM EDT FRI APR 6 2007 DEZ002>004-MDZ012-015-019-020-NJZ021-023-024-071100- /O.NEW.KPHI.SN.Y.0006.070407T0600Z-070407T1500Z/ 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 324 PM EDT FRI APR 6 2007 ...SNOW ADVISORY IN EFFECT FROM 2 AM TO 11 AM EDT SATURDAY... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A SNOW ADVISORY...WHICH IS IN EFFECT FROM 2 AM TO 11 AM EDT SATURDAY. AN AREA OF LOW PRESSURE IS EXPECTED TO DEVELOP ALONG THE MID ATLANTIC COAST DURING THE OVERNIGHT HOURS, THEN INTENSIFY AS IT MOVES NORTHEAST AWAY FROM THE REGION ON SATURDAY. MOISTURE FROM THIS SYSTEM WILL START TO OVERSPREAD THE AREA FROM WEST TO EAST AROUND OR JUST AFTER MIDNIGHT, THEN MOVE OUT OF THE REGION BY LATE SATURDAY MORNING. WITH COLD AIR ALREADY IN PLACE, PRECIPITATION WILL FALL IN THE FORM OF WET SNOW ACROSS THE ENTIRE MID ATLANTIC REGION. THE HIGHEST SNOWFALL AMOUNTS FROM THIS LATE SEASON EVENT, ONE TO THREE INCHES, ARE EXPECTED ACROSS THE MIDDLE PORTIONS OF THE DELMARVA PENINSULA, INCLUDING TALBOT, CAROLINE, KENT AND QUEEN ANNES COUNTIES IN MARYLAND, SUSSEX AND KENT COUNTIES IN DELAWARE, AND CUMBERLAND AND CAPE MAY COUNTIES IN NEW JERSEY. A WINTER WEATHER ADVISORY HAS THEREFORE BEEN ISSUED FOR THESE COUNTIES. ONE OR TWO INCHES ARE EXPECTED FURTHER NORTH IN CECIL COUNTY MD, NEW CASTLE COUNTY DE, AND SALEM COUNTY NJ. WHILE THESE SNOWFALL AMOUNTS WILL CAUSE SLIPPERY DRIVING CONDITIONS, THEY DO NOT CONSTITUTE ENOUGH DEPTH TO WARRANT AN ADVISORY AT THIS TIME. AN INCH OR LESS IS EXPECTED IN AND AROUND PHILADELPHIA. GIVEN THAT PRECIPITATION WILL BEGIN DURING THE OVERNIGHT HOURS, SNOW IS EXPECTED TO STICK ON ROADWAYS AND CONCRETE SURFACES, AS WELL AS ON GRASSY AREAS, FROM THE ONSET. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ JJM
3 follow-up statements
000 WWUS41 KPHI 070146 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 946 PM EDT FRI APR 6 2007 DEZ001-MDZ008-NJZ016-022-025-071000- /O.EXB.KPHI.SN.Y.0006.070407T0700Z-070407T1500Z/ NEW CASTLE-CECIL-SALEM-ATLANTIC-COASTAL ATLANTIC- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...PENNSVILLE... HAMMONTON...ATLANTIC CITY 946 PM EDT FRI APR 6 2007 ...SNOW ADVISORY IN EFFECT FROM 3 AM TO 11 AM EDT SATURDAY... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A SNOW ADVISORY...WHICH IS IN EFFECT FROM 3 AM TO 11 AM EDT SATURDAY. AN AREA OF LOW PRESSURE IS EXPECTED TO DEVELOP ALONG THE MID ATLANTIC COAST OVERNIGHT... THEN INTENSIFY AS IT MOVES NORTHEAST AWAY FROM THE REGION ON SATURDAY. MOISTURE FROM THIS SYSTEM WILL START TO OVERSPREAD THE AREA FROM WEST TO EAST AFTER MIDNIGHT... THEN MOVE OUT OF THE REGION BY LATE SATURDAY MORNING. WITH COLD AIR ALREADY IN PLACE... PRECIPITATION WILL FALL IN THE FORM OF WET SNOW ACROSS THE ADVISORY AREA INTO MID MORNING SATURDAY. ONE TO THREE INCHES CAN BE EXPECTED FROM THIS EVENT BY THE TIME PRECIPITATION ENDS LATE SATURDAY MORNING OR EARLY SATURDAY AFTERNOON. RAIN MAY MIX WITH THE SNOW LATE SATURDAY MORNING. A WINTER WEATHER ADVISORY HAS THEREFORE BEEN ISSUED FOR THESE AREAS. GIVEN THAT PRECIPITATION WILL BEGIN DURING THE OVERNIGHT HOURS WHEN TEMPERATURES ARE BELOW FREEZING...SNOW IS EXPECTED TO STICK TO ROADWAYS AND CONCRETE SURFACES...AS WELL AS ON GRASSY AREAS. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ DEZ002>004-MDZ012-015-019-020-NJZ021-023-024-071000- /O.EXT.KPHI.SN.Y.0006.070407T0700Z-070407T1500Z/ 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 946 PM EDT FRI APR 6 2007 ...SNOW ADVISORY NOW IN EFFECT FROM 3 AM TO 11 AM EDT SATURDAY... THE SNOW ADVISORY IS NOW IN EFFECT FROM 3 AM TO 11 AM EDT SATURDAY. THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A SNOW ADVISORY...WHICH IS IN EFFECT FROM 3 AM TO 11 AM EDT SATURDAY. AN AREA OF LOW PRESSURE IS EXPECTED TO DEVELOP ALONG THE MID ATLANTIC COAST OVERNIGHT...THEN INTENSIFY AS IT MOVES NORTHEAST AWAY FROM THE REGION ON SATURDAY. MOISTURE FROM THIS SYSTEM WILL START TO OVERSPREAD THE AREA FROM WEST TO EAST AFTER MIDNIGHT... THEN MOVE OUT OF THE REGION BY LATE SATURDAY MORNING. WITH COLD AIR ALREADY IN PLACE... PRECIPITATION WILL FALL IN THE FORM OF WET SNOW ACROSS THE ADVISORY AREA INTO MID MORNING SATURDAY. THE HIGHEST SNOWFALL AMOUNTS FROM THIS LATE SEASON EVENT...TWO TO FOUR INCHES...ARE EXPECTED ACROSS THE MIDDLE PORTIONS OF THE DELMARVA PENINSULA...INCLUDING TALBOT... CAROLINE... KENT AND QUEEN ANNES COUNTIES IN MARYLAND...AND SUSSEX COUNTY IN DELAWARE. ONE TO THREE INCHES OF SNOW IS EXPECTED IN KENT COUNTY DELAWARE..AND CAPE MAY AND CUMBERLAND COUNTIES IN NEW JERSEY. RAIN MAY MIX WITH THE SNOW LATE SATURDAY MORNING. A WINTER WEATHER ADVISORY THEREFORE REMAINS IN EFFECT FOR THESE AREAS. GIVEN THAT PRECIPITATION WILL BEGIN DURING THE OVERNIGHT HOURS WHEN TEMPERATURES ARE BELOW FREEZING...SNOW IS EXPECTED TO STICK ON ROADWAYS AND CONCRETE SURFACES...AS WELL AS ON GRASSY AREAS. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$
000 WWUS41 KPHI 070743 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 343 AM EDT SAT APR 7 2007 DEZ001>004-MDZ008-012-015-019-020-NJZ016-021>025-071500- /O.CON.KPHI.SN.Y.0006.000000T0000Z-070407T1500Z/ NEW CASTLE-KENT DE-INLAND SUSSEX-DELAWARE BEACHES-CECIL-KENT MD- QUEEN ANNES-TALBOT-CAROLINE-SALEM-CUMBERLAND-ATLANTIC-CAPE MAY- ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC- INCLUDING THE CITIES OF...WILMINGTON...DOVER...GEORGETOWN... REHOBOTH BEACH...ELKTON...CHESTERTOWN...CENTREVILLE...EASTON... DENTON...PENNSVILLE...MILLVILLE...HAMMONTON... CAPE MAY COURT HOUSE...OCEAN CITY...ATLANTIC CITY 343 AM EDT SAT APR 7 2007 ...SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 AM EDT THIS MORNING... A SNOW ADVISORY REMAINS IN EFFECT UNTIL 11 AM EDT TODAY. AN AREA OF LOW PRESSURE WAS DEVELOPING ALONG THE NORTHERN NORTH CAROLINA COAST EARLY THIS MORNING. THAT LOW IS EXPECTED TO INTENSIFY TODAY AS IT MOVES NORTHEAST AND AWAY FROM THE REGION. MOISTURE FROM THIS SYSTEM WILL START TO OVERSPREAD THE AREA BY DAYBREAK...THEN MOVE OUT OF THE REGION BY NOON. PRECIPITATION IS FORECAST TO FALL IN THE FORM OF WET SNOW...WITH ONE TO FOUR INCHES OF SNOW FORECAST OVER THE ADVISORY AREA. GEOGRAPHICALLY...THE HIGHEST AMOUNTS ARE EXPECTED OVER SOUTHERN DELAWARE...ADJACENT PORTIONS OF THE MARYLAND EASTERN SHORE AND EXTREME SOUTHERN NEW JERSEY. HOWEVER...FROM A PRACTICAL PERSPECTIVE...THESE AMOUNTS ARE MOST LIKELY TO BE REALIZED ON GRASSY SURFACES. SOMEWHAT LESSER AMOUNTS ARE EXPECTED TO STICK ON ROADWAYS. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ MPD
000 WWUS41 KPHI 071300 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 900 AM EDT SAT APR 7 2007 DEZ001>004-MDZ008-012-015-019-020-NJZ016-021>025-071400- /O.CAN.KPHI.SN.Y.0006.000000T0000Z-070407T1500Z/ NEW CASTLE-KENT DE-INLAND SUSSEX-DELAWARE BEACHES-CECIL-KENT MD- QUEEN ANNES-TALBOT-CAROLINE-SALEM-CUMBERLAND-ATLANTIC-CAPE MAY- ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC- INCLUDING THE CITIES OF...WILMINGTON...DOVER...GEORGETOWN... REHOBOTH BEACH...ELKTON...CHESTERTOWN...CENTREVILLE...EASTON... DENTON...PENNSVILLE...MILLVILLE...HAMMONTON... CAPE MAY COURT HOUSE...OCEAN CITY...ATLANTIC CITY 900 AM EDT SAT APR 7 2007 ...SNOW ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CANCELLED THE SNOW ADVISORY. THE HEAVIEST AREA OF SNOW HAS MOVED OFF THE COAST, SO THE SNOW ADVISORY HAS BEEN CANCELLED. ADDITIONAL LIGHT SNOW IS POSSIBLE THROUGH THE MORNING HOURS, BUT ACCUMULATIONS WILL BE GENERALLY AN INCH OR LESS, AND MAINLY CONFINED TO THE GRASSY AREAS. ALL SNOW SHOULD TAPER OFF BY AFTERNOON. $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 6, 3:47 AM EDT | Freeze Watch | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more | 35 hr |
| Apr 6, 3:47 AM EDT | Hard Freeze Warning | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more | 24 hr |
Nearby
Snow Advisories in Maryland, 2007Snow Advisories in New Jersey, 2007Snow Advisories in Delaware, 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.