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Update Weather Briefing #1 National Weather Service – Buffalo NY Prolonged Wintry Weather – Dec 9-11 Applies to NWS Buffalo Area of Responsibility Only National Weather Service - Buffalo NY – www.weather.gov/buf http://www.facebook.com/US.NationalWeatherService.Buffalo.gov on FACEBOOK @NWSBuffalo on TWITTER 2 Overview A prolonged period of wintry weather begins Light precipitation overspreads the region from southeast to northwest today Initially beginning as rain the precipitation will change to a mix of rain, sleet and snow Precipitation changes to all snow overnight Snow continues through Thursday, slowly diminishing Thursday Night with lingering snow showers through Friday 12/9/2014 National Weather Service - Buffalo NY http://www.facebook.com/US.NationalWeatherService.Buffalo.gov @NWSBuffalo on Twitter 3 Current Headlines WINTER WEATHER ADVISORY (purple shading)in effect for the entire NWS Buffalo forecast area 12/9/2014 National Weather Service - Buffalo NY http://www.facebook.com/US.NationalWeatherService.Buffalo.gov @NWSBuffalo on Twitter 4 Weather Synopsis – Today Two low pressure areas...one over the Great Lakes and one off the Atlantic Coast...will bring a wintry mix of precipitation to the region Light rain spreads northwest across the region As colder air is drawn south, the precipitation changes to a mix of rain and snow Over the higher elevations of the Tug Hill some sleet is also possible. 930 AM Composite Radar Mosaic Snowfall accumulations less than an inch This Morning’s (8AM) Surface Map Light Winds 12/9/2014 National Weather Service - Buffalo NY http://www.facebook.com/US.NationalWeatherService.Buffalo.gov @NWSBuffalo on Twitter 5 Weather Synopsis – Tonight through Wednesday Cold air deepens over the regions as low pressure deepens off the NY/NJ coast Precipitation: Changes to all snow and continues across the entire region “Moderate” snows develop across Northern New York and the Finger Lakes with snowfall rates of up to 1 ½ inches per hour Snow type will be heavy, wet so blowing snow is not expected to be a major factor Winds: North 10 to 20 mph gusts up to 30 mph becoming northwest 12/9/2014 Wednesday’s (7AM) Forecast Surface Map National Weather Service - Buffalo NY http://www.facebook.com/US.NationalWeatherService.Buffalo.gov @NWSBuffalo on Twitter 6 Snowfall Forecast Tonight Wednesday 12/9/201 4 National Weather Service - Buffalo NY http://www.facebook.com/US.NationalWeatherService.Buffalo.gov @NWSBuffalo on Twitter 7 Weather Synopsis – Wednesday Night / Thursday The prolonged winter event continues as low pressure only moves from Long Island on Wednesday to Massachusetts on Thursday Snow continues across the region Expect some lake enhancement south of the Lakes Enhanced snow will also fall over the higher terrain of those areas south and east of the Thruway Winds: Northwest 10 to 20 with gusts to 30 mph 12/9/2014 Thursday’s (7AM) Forecast Surface Map National Weather Service - Buffalo NY http://www.facebook.com/US.NationalWeatherService.Buffalo.gov @NWSBuffalo on Twitter 8 Snowfall Forecast Wednesday Night Thursday 12/9/201 4 National Weather Service - Buffalo NY http://www.facebook.com/US.NationalWeatherService.Buffalo.gov @NWSBuffalo on Twitter 9 Weather Synopsis – Thursday Night / Friday Low pressure continues to slowly lift northeast Snow will slowly diminish Thursday night Lingering snow showers continue through Friday, especially south and southeast of the Lakes Additional snowfall amounts of less than two inches Thursday Night/Friday 12/9/2014 Friday’s (7AM) Forecast Surface Map National Weather Service - Buffalo NY http://www.facebook.com/US.NationalWeatherService.Buffalo.gov @NWSBuffalo on Twitter 10 Forecast Storm Total Snowfall – Tuesday 7PM through Friday 7AM 12/9/2014 National Weather Service - Buffalo NY http://www.facebook.com/US.NationalWeatherService.Buffalo.gov @NWSBuffalo on Twitter Temperatures 11 Highs: NOTE: Areas near and downwind of the Lakes will be moderated by the water temperatures Today: Upper 30s to low 40s Wednesday: Nearly steady around 30 Thursday: Around 30 Friday: Mid 30s Overnight Lows: Tuesday Night: Upper 20s to around 32 Wednesday Night and Thursday Night: In the 20s 12/9/2014 National Weather Service - Buffalo NY http://www.facebook.com/US.NationalWeatherService.Buffalo.gov @NWSBuffalo on Twitter 12 Impact Summary A prolonged period of wintry weather – Tonight through Friday Precipitation begins as a mix of rain and snow Snowfall amounts will be greatest across the Tug Hill and the higher elevations south and east of the Thruway Some freezing rain is possible over the North Country this evening/tonight Greatest snowfall rates of 1-2”/hour will occur over the Tug Hill tonight and over the higher elevations southeast of Lake Ontario Wednesday through Thursday The snow type will be heavy, wet so blowing snow should not be an issue 12/9/2014 National Weather Service - Buffalo NY http://www.facebook.com/US.NationalWeatherService.Buffalo.gov @NWSBuffalo on Twitter 13 General Reminders Weather forecasts are constantly being updated. Always monitor the situation as it develops. Emergency managers, government partners and media can log onto to NWSChat Live (http://nwschat.weather.gov/) to get critical warning decision expertise from the forecasters and exchange real-time information The latest Area Forecast Discussion can be found at: http://www.erh.noaa.gov/displayprod.php?product=BUFAFDBUF&versions=1 Follow us on Facebook and Twitter! https://www.facebook.com/US.NationalWeatherService.Buffalo.gov @NWSBUFFALO or #BUFWX 12/9/2014 National Weather Service - Buffalo NY http://www.facebook.com/US.NationalWeatherService.Buffalo.gov @NWSBuffalo on Twitter