The National Weather Service in North Platte has issued a * Tornado Warning for... Southwestern Cherry County in north central Nebraska... Northwestern Grant County in west central Nebraska... Southeastern Sheridan County in the Panhandle of Nebraska... * Until 730 PM MDT. * At 643 PM MDT, a confirmed large and extremely dangerous tornado was located near Ashby, or 39 miles north of Arthur, moving northeast at 15 mph. This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW! HAZARD...Damaging tornado. SOURCE...Weather spotters confirmed tornado still remains on the ground. IMPACT...You are in a life-threatening situation. Flying debris may be deadly to those caught without shelter. Mobile homes will be destroyed. Considerable damage to homes, businesses, and vehicles is likely and complete destruction is possible. * This tornadic thunderstorm will remain over mainly rural areas of southwestern Cherry, northwestern Grant and southeastern Sheridan Counties, including the following locations... Finnegan Lake, Dipping Vat Meadow, and Mother Lake. This includes the following highways... Highway 2 between mile markers 131 and 138. Highway 61 between mile markers 162 and 170. PRECAUTIONARY/PREPAREDNESS ACTIONS... To repeat, a large, extremely dangerous and potentially deadly tornado is on the ground. To protect your life, TAKE COVER NOW! Move to a basement or an interior room on the lowest floor of a sturdy building. Avoid windows. If you are outdoors, in a mobile home, or in a vehicle, move to the closest substantial shelter and protect yourself from flying debris.