...Severe weather safety rules... Scattered severe thunderstorms are possible this afternoon in western Maryland...the Shenandoah Valley...Potomac Highlands and central foothills. Residents across the region should monitor this situation closely and ensure your NOAA weather radios are set to alert Mode. Severe weather warnings may become necessary. Here are some safety rules to keep in mind when severe weather is expected or is occurring. If a warning is issued...seek shelter indoors immediately. A severe thunderstorm is defined as producing quarter size or greater hail and wind gusts of 58 mph or more. Stay tuned to NOAA Weather Radio...commercial radio or television for the latest on this potential severe weather event.