News: National Weather Service Says to Watch Out for "Thundersnow" Overnight

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 PM EST SATURDAY.
* PRECIPITATION TYPE...HEAVY SNOW...ACCOMPANIED OCCASIONALLY BY THUNDER OVERNIGHT.
* ACCUMULATIONS...WIDESPREAD STORM TOTAL ACCUMULATIONS OF 20 TO 30 INCHES...WITH SOME LOCATIONS RECEIVING LOCALLY HEAVIER AMOUNTS ESPECIALLY ACROSS WESTERN MARYLAND AND THE EASTERN WEST VIRGINIA PANHANDLE.
* TIMING...SNOW WILL CONTINUE THROUGH SATURDAY EVENING. THE HEAVIEST SNOWFALL WILL OCCUR THROUGH SATURDAY MORNING WITH THE MOST HAZARDOUS CONDITIONS OCCURRING OVERNIGHT.
* VISIBILITIES...WIDESPREAD VISIBILITIES AROUND ONE-QUARTER MILE ARE EXPECTED TONIGHT IN HEAVY SNOW.
* TEMPERATURES...TEMPERATURES WILL BE IN THE MID TO UPPER 20S TONIGHT AND SATURDAY.
* WINDS...BECOMING NORTHEAST 10 TO 20 MPH LATE TODAY. GUSTS OF 20 TO 30 MPH TONIGHT AND SATURDAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS EXTREMELY DANGEROUS STORM IS EXPECTED TO PRODUCE RECORD SNOWFALL FOR THE BALTIMORE AND WASHINGTON DC METROPOLITAN AREAS. TRAVEL CONDITIONS TONIGHT ACROSS THE REGION WILL BE EXTREMELY HAZARDOUS AND LIFE-THREATENING. HELP YOUR LOCAL AND STATE GOVERNMENT FIRST RESPONDERS AND TRANSPORTATION AGENCIES BY STAYING OFF THE ROADS. A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE... ESPECIALLY NEAR THE COASTLINE.

What the heck is "thundersnow"? Here is your answer ...