Northern Baltimore Severe Watches & Warnings NOAA Weather Radio

Winter Storm Watch, Winter Weather Advisory
Statement as of 10:40 EST le 25 janvier 2015

...Winter Weather Advisory remains in effect from 10 PM this evening to 6 PM EST Monday... ...Winter Storm Watch in effect from Monday evening through Tuesday afternoon...

The National Weather Service in Baltimore MD/Washington has issued a Winter Storm Watch...which is in effect from Monday evening through Tuesday afternoon. The Winter Weather Advisory remains in effect tonight through Monday.

* Precipitation type...snow...possibly heavy at times.

* Accumulations...2 to 4 inches expected tonight through Monday...with an additional 3 to 5 inches possible Monday night through Tuesday.

* Timing...snow will begin late tonight and continue through Tuesday. The heaviest snowfall will occur between early Monday morning and Monday afternoon...with another round of heavy snow possible Monday night.

* Temperatures...in the upper 20s.

* Winds...north 10 to 20 mph with gusts up to 30 mph Monday night and Tuesday.

* Impacts...roads will be snow covered and slippery with visibilities being reduced to near one-quarter mile at times. The combination of snow covered roads and low visibility will make traveling dangerous.

Precautionary/preparedness actions...

A Winter Weather Advisory for snow means that periods of snow will cause primarily travel difficulties. Be prepared for snow covered roads and limited visibilities...and use caution while driving.

A Winter Storm Watch means there is a potential for significant snow...sleet...or ice accumulations that may impact travel. Continue to monitor the latest forecasts.

Special Statement
Statement as of 11:56 EST le 25 janvier 2015

...Complex winter weather coming to Baltimore/Washington region tonight through Tuesday...

A complex winter storm scenario will develop tonight and continue through Tuesday for the greater Baltimore/Washington region.

Low pressure will cross the Ohio Valley tonight...then redevelop offshore of Cape Hatteras as a strong coastal storm during the day Monday. This will give the greater Baltimore and Washington region two separate bouts of winter weather.

The first round of precipitation will start early this evening in western Maryland...extreme northern Virginia...and the eastern Panhandle of West Virginia and continue through Monday. In these areas...the precipitation may start as a period of mixed rain and snow before changing over to all snow by daybreak Monday. The snow will continue through the day on Monday...making travel difficult particularly north of Interstate 66 and west of the Blue Ridge. Winter storm warnings have been posted for this region.

Tonight...as the precipitation progresses eastward towards the Interstate 95 corridor...rain will mix with snow in the immediate Baltimore and Washington DC metropolitan areas as it spreads eastward. However...by daybreak Monday...precipitation should change over to all snow across the entire region with the exception of southern Maryland. Some models suggest that precipitation on Monday will stay all rain in areas south and east of Washington DC...so there remains considerable uncertainty for areas of Maryland south of Route 50. Winter weather advisories have been issued for the greater Baltimore and Washington metropolitan areas.

Finally...as the coastal storm starts to rapidly develop late Monday afternoon off the North Carolina coast...a second round of winter weather may further impact the region...this time primarily east of Interstate 95. Snow bands along with gusty northeast winds up to 40 mph are expected to develop around the powerful storm system Monday night and Tuesday as it moves northeast towards Cape Cod. An additional 5 inches or more of snow is possible in the counties along Maryland's portion of the Chesapeake Bay. Blowing snow is also possible...reducing visibilities to below one-quarter of a mile at times. Winter storm watches have been issued for the Maryland counties directly adjacent to the Chesapeake Bay.

Stay tuned to your favorite media outlet and NOAA Weather Radio for further updates on this developing winter storm system.

Lee