* WHAT. Very cold wind chills as low as 5 below expected. * WHERE. In Maryland, Calvert, Charles, and St. Marys Counties. In Virginia, Albemarle, King George, Nelson, Orange, Spotsylvania, and Stafford Counties. * WHEN. From 10 PM Tuesday to 10 AM EST Thursday. * IMPACTS. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. Wind chill values can lead to hypothermia with prolonged exposure. Very cold temperatures can lead to hypothermia with prolonged exposure.

* WHAT. Very cold wind chills between 0 degrees to 10 degrees below zero expected. * WHERE. Portions of central, northeast and northern Maryland, The District of Columbia and central, northern and northwest Virginia. * WHEN. Until 10 AM EST Thursday. * IMPACTS. The cold wind chills as low as 10 below zero could result in hypothermia if precautions are not taken. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. Wind chill values can lead to hypothermia with prolonged exposure. Very cold temperatures can lead to hypothermia with prolonged exposure. * ADDITIONAL DETAILS. The coldest conditions are expected Tuesday night, with widespread wind chills of 5 to 10 degrees below zero. Other nights, wind chills will be between 0 degrees to 5 degrees below zero. During the daytime, wind chills are expected to only reach the low teens.

* WHAT. Very cold wind chills as low as 5 to 15 degrees below zero expected. * WHERE. Portions of north central and western Maryland, northwest and western Virginia and eastern and panhandle West Virginia. * WHEN. Until 10 AM EST Thursday. * IMPACTS. The cold wind chills as low as 10 below zero could result in hypothermia if precautions are not taken. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. Very cold temperatures and wind chills can lead to hypothermia with prolonged exposure. * ADDITIONAL DETAILS. The coldest conditions are expected Tuesday night, with widespread wind chills of 10 to 15 degrees below zero. Other nights, wind chills will be between 5 to 10 degrees below zero. During the daytime, wind chills are expected to only reach the upper single digits.

* WHAT. Very cold wind chills as low as 5 below expected. * WHERE. In Maryland, Calvert, Charles, and St. Marys Counties. In Virginia, Albemarle, King George, Nelson, Orange, Spotsylvania, and Stafford Counties. * WHEN. From 10 PM Tuesday to 10 AM EST Thursday. * IMPACTS. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. Wind chill values can lead to hypothermia with prolonged exposure. Very cold temperatures can lead to hypothermia with prolonged exposure. * ADDITIONAL DETAILS. The coldest conditions are expected Tuesday night, with widespread wind chills around 5 degrees below zero. Other nights, wind chills will be around or just below 0 degrees. During the daytime, wind chills are expected to only reach the low to middle teens.

* WHAT. Very cold wind chills as low as 5 to 15 degrees below zero expected. * WHERE. Portions of north central and western Maryland, northwest and western Virginia and eastern and panhandle West Virginia. * WHEN. Until 10 AM EST Thursday. * IMPACTS. The cold wind chills as low as 10 below zero could result in hypothermia if precautions are not taken. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. Very cold temperatures and wind chills can lead to hypothermia with prolonged exposure. * ADDITIONAL DETAILS. The coldest conditions are expected Tuesday night, with widespread wind chills of 10 to 15 degrees below zero. Other nights, wind chills will be between 5 to 10 degrees below zero. During the daytime, wind chills are expected to only reach the upper single digits.

* WHAT. Very cold wind chills between 0 degrees to 10 degrees below zero expected. * WHERE. Portions of central, northeast and northern Maryland, The District of Columbia and central, northern and northwest Virginia. * WHEN. Until 10 AM EST Thursday. * IMPACTS. The cold wind chills as low as 10 below zero could result in hypothermia if precautions are not taken. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. Wind chill values can lead to hypothermia with prolonged exposure. Very cold temperatures can lead to hypothermia with prolonged exposure. * ADDITIONAL DETAILS. The coldest conditions are expected Tuesday night, with widespread wind chills of 5 to 10 degrees below zero. Other nights, wind chills will be between 0 degrees to 5 degrees below zero. During the daytime, wind chills are expected to only reach the low teens.

* WHAT. Very cold temperatures as low as 5 below expected. * WHERE. In Maryland, Charles, St. Marys and Calvert Counties. In Virginia, Nelson, Albemarle, Orange, Stafford, Spotsylvania and King George Counties. * WHEN. From 10 PM this evening to 10 AM EST Thursday. * IMPACTS. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. Wind chill values can lead to hypothermia with prolonged exposure. Very cold temperatures can lead to hypothermia with prolonged exposure. * ADDITIONAL DETAILS. The coldest conditions are expected Tuesday night, with widespread wind chills around 5 degrees below zero. Other nights, wind chills will be around or just below 0 degrees. During the daytime, wind chills are expected to only reach the low to middle teens.