Central and Southeast Howard Severe Watches & Warnings NOAA Weather Radio

... Wind Chill Advisory in effect from 10 PM this evening to 11 am
EST Monday... 

* what... very cold wind chills expected. Wind chills between 5 and 
  15 below zero expected.

* Where... the District of Columbia, much of central and southern
  Maryland, central and northern Virginia including the Shenandoah
  Valley, and the eastern Panhandle of West Virginia.
 
* When... from 10 PM this evening to 11 am EST Monday.

* Additional details... the cold wind chills could result in 
  hypothermia if precautions are not taken.

Precautionary/preparedness actions... 

A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frostbite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves. 

... Wind Advisory remains in effect from 11 am this morning to
7 PM EST this evening... 

* timing... midday through early evening today. Highest gusts will
  be during the afternoon.

* Winds... northwest 20 to 25 mph with gusts up to 50 mph.

* Impacts... strong winds may blow down limbs, trees, and power 
  lines. Scattered power outages are expected.

Precautionary/preparedness actions... 

A Wind Advisory means that winds of 45 to 55 mph are expected.
Winds this strong can make driving difficult, especially for high
profile vehicles.