Download - Current Briefing
National Weather Service
Philadelphia/Mt. Holly
Winter Storm Saturday afternoon into Sunday
February 21-22, 2015
• Briefing #4, prepared 430 PM EST Friday, February 20, 2015 by Meteorologists at NWS - WFO Mount Holly, NJ
• To promote situational awareness for the emergency management community and for other partners.
• To provide guidance for planning efforts.
• The briefing applies to the WFO Mount Holly service area which is shaded in green on the map.
National Weather Service
Philadelphia/Mt. Holly
• Very cold temperatures are expected again tonight, with lows ranging from 5
degrees below zero in the Poconos and northwest New Jersey to around 5 degrees
elsewhere. However, there won’t be much wind, so it won’t feel quite as bad as last
night.
• Then another storm will approach from the west on Saturday. Very cold
temperatures in the morning will slowly warm through the day, but precipitation is
expected to begin as snow Saturday afternoon across our entire County Warning
Area (CWA). Then, as warmer air moves north, snow will change briefly to sleet,
then rain, from south to north. By evening, rain or rain/snow/sleet mixture is
expected in Philadelphia and points south, but with so much entrenched cold air,
the transition will take longer further north. For instance, the Lehigh Valley and
central New Jersey may not transition to rain until Sunday morning. Please see
attached maps for snowfall forecasts.
• Where rain makes contact with very cold surfaces, ice buildup could occur.
However, right now we don’t see this as a widespread problem.
• Precipitation will end from west to east on Sunday as another arctic cold front
moves in, bringing below normal temperatures to the region for the beginning of the
new week.
• Northwest winds will bring low-water conditions on the ocean front, as well as both
the Chesapeake and Delaware Bays (including tidal Delaware River), at the time of
low tide tonight, and perhaps again at the time of low tide on Saturday.
Executive Summary
National Weather Service
Philadelphia/Mt. Holly
Snow Potential Saturday Afternoon into Sunday (February 21-22)
Expect at least this much Potential for this much Official NWS Forecast
Minimum Most Likely
Maximum
Snowfall maps available at weather.gov/phi/winter/
National Weather Service
Philadelphia/Mt. Holly
Questions? • For the latest information, visit our website at:
– www.weather.gov/phi
• Our latest briefing package is available from our website at:
– http://www.erh.noaa.gov/phi/briefing/packages/current_briefing.pdf
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• [email protected] – Office 609-261-6602 x222
• [email protected] – Office 609-261-6602 x223