Coastal Storm Wednesday through Friday, 3/6-8/2013 Weather Briefing Prepared 2:00 PM EST Wednesday, March 6, 2013 National Weather Service New York, NY
Purpose of Briefing Promote Situational Awareness Provide Guidance for Planning Briefing Applies to Area Shaded in Blue
Overview Intense low pressure along the VA coast will move very slowly east tonight through Friday A potent upper level disturbance will merge with the offshore low Thursday night into Friday Strong Winds, Coastal Flooding, Beach Erosion, High Surf and Wet Snow expected 3
Forecast Changes Less Snowfall Starting off warmer, so expect a later change to snow and lower amounts of a slushy 1-2 for tonight Coastal Flooding Upgrade of watches to warnings/advisories for the high tide cycle late tonight into early Thursday morning 4
Current Forecast Hazards Winter Storm Warning Tonight through Friday Morning http://forecast.weather.gov/wwamap/wwatxtget.php?cwa=okx&wwa=winter storm warning - New London and Eastern Suffolk Counties - Snowfall 2-4 through Thursday afternoon - Might be downgraded to advisory for total snowfall 5-8" Winter Weather Advisory Tonight through Thu Afternoon http://forecast.weather.gov/wwamap/wwatxtget.php?cwa=okx&wwa=winter weather advisory - Coastal CT, Lower Hudson Valley, NYC Metro, Western/Central Long Island - Snowfall 2-3 through Thu afternoon - Advisory may be extended into Thu night-fri for an additional 2-4 5
Current Forecast Hazards Wind Advisory through Thursday Afternoon http://forecast.weather.gov/wwamap/wwatxtget.php?cwa=okx&wwa=wind advisory - Coastal Regions of CT, NJ, NYC Metro and Long Island - Sustained northeast winds 25-35 mph with gusts 45 to 55 mph 6
Current Forecast Hazards Coastal Flooding will impact Multiple High Tide Cycles For Late This Afternoon and This Evening: Coastal Flood WARNING http://forecast.weather.gov/wwamap/wwatxtget.php?cwa=okx&wwa=coastal%20flood%20warning - Westernmost LI Sound (Westchester, Bronx, N. Queens, N. Nassau) - Peconic/Gardiners Bays of Long Island Coastal Flood Advisories http://forecast.weather.gov/wwamap/wwatxtget.php?cwa=okx&wwa=coastal%20flood%20advisory - SW Connecticut (Fairfield/New Haven) and NW Suffolk - NY Harbor and South Shore Bays of Nassau/W. Suffolk 7
Current Forecast Hazards For Late Tonight into Thursday Morning Might Issue Coastal Flood WARNING http://forecast.weather.gov/wwamap/wwatxtget.php?cwa=okx&wwa=coastal%20flood%20warning - Long Island South Shore Bays - Peconic/Gardiners Bays of Long Island Coastal Flood Advisories http://forecast.weather.gov/wwamap/wwatxtget.php?cwa=okx&wwa=coastal%20flood%20advisory - Long Island Sound - NY Harbor 8
Current Marine Hazards Storm Warnings through Thu Afternoon Wind Gusts up to 50 knots on the ocean waters south of Long Island, Eastern Long Island and Peconic/Gardiners Bays Gale Warnings through Thu Afternoon Wind Gusts up to 45 Knots on Western Long Island Sound, NY Harbor and the Long Island South Shore Bays 9
Timing o Late this afternoon - Light rain occasionally mixed with sleet with E- NE winds 25-35 mph with gusts to 45-55 mph o Tonight Precipitation should change to Wet Accumulating Snow from NW to SE mainly through this evening, heaviest over eastern Long Island and Southeast CT as temperatures fall to 30-35 with N-NE Winds 25-35 mph gusting to 45-55 mph o Thu Intermittent Light Snow; High Temperatures Mid/Upper 30s; North Winds 20-30 mph; Gusts to 45 mph o Thu Night/Fri Occasional Light Snow with Light Accumulations; Temperatures mostly in the 30s National Weather Service New York, NY
Forecast Changes Total Snowfall 6 pm Wed 7 pm Fri Starting off warmer, so expect later change to snow tonight General 3-5 amounts likely in two rounds Tonight-early Thu morning Thu night-fri Some amounts over 6 still possible over New London County CT and on the LI Twin Forks near Montauk
Liquid Equivalent Precipitation 7am Wed 7 pm Fri
Questions? Get the latest information at: www.weather.gov/nyc Area Forecast Discussion Hazardous Weather Outlook Facebook/Twitter National Weather Service New York, NY