Alert archive / New Jersey / Winter Weather Advisories in 2008
Winter Weather Advisory 17, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this winter weather advisory at Dec 20, 2008, 2:44 PM EST for 16 counties in New Jersey; 7 counties in Pennsylvania; 5 counties in Maryland. It took effect at Dec 21, 2008, 3:00 AM EST. It was in force for 10 hr.
The area
The counties it named.
The facts
- Issued
- Dec 20, 2008, 2:44 PM EST (19:44 UTC)
- In effect from
- Dec 21, 2008, 3:00 AM EST
- Expired
- Dec 21, 2008, 1:00 PM EST
- In force
- 10 hr
- Issued by
- NWS Philadelphia/Mount Holly
All 28 counties
Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Carbon County, PA, Delaware County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 65 km from the middle of the area, began a volume at 19:46 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
Brookhaven, NY (KOKX), launched 12:00Z, 7.7 hours before the alert went out and 215 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
- 1 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 495 m above ground
- 0-6 km bulk shear
- 85 kt
- 0-1 km storm-relative helicity
- 307 m²/s²
- 0-3 km storm-relative helicity
- 522 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this winter weather advisory went out at Dec 20, 1:25 PM EST, 1 hour 19 minutes earlier.
Area forecast discussion, Dec 20, 1:25 PM EST, 1 hour 19 minutes before
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</html>The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 20, 3:28 PM EST | Gale Warning | PHI | 54 hr |
Nearby
Winter Weather Advisories in New Jersey, 2008Winter Weather Advisories in Pennsylvania, 2008Winter Weather Advisories in Maryland, 2008Every winter weather advisory in 2008
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.