* WHAT. Heat index values in the mid 90s. * WHERE. All of western New York. * WHEN. Until 8 PM EDT Thursday. * IMPACTS. Hot temperatures and high humidity may cause heat related illnesses to occur.

* WHAT. Heat index values of 100 to 104 degrees are expected at times this week with variability each day due to clouds and scattered showers and storms. * WHERE. Portions of north central, northeast, and northwest Ohio and northwest Pennsylvania. * WHEN. Until 8 PM EDT Friday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses. The prolonged nature of the heat may increase heat stress with time.

SMWBUF The National Weather Service in Buffalo has issued a * Special Marine Warning for. Lake Erie from Ripley to the Buffalo Harbor. Lake Ontario from the Niagara River to Olcott. The Upper and Lower Niagara River and Buffalo Harbor. * Until 345 AM EDT. * At 248 AM EDT, strong thunderstorms were located along a line extending from 13 nm west of Niagara River to 18 nm northwest of Lake Erie Beach to 9 nm north of Erie, moving east at 25 knots. HAZARD. Wind gusts to 40 knots and small hail. SOURCE. Radar. IMPACT. Small craft could be damaged in briefly higher winds and suddenly higher waves. * Locations impacted include. Van Buren Point, Small Boat Harbor, Lake Erie Beach, Grand Island, Barcelona, Olcott, Woodlawn Beach, Erie Basin Marina, Wilson, Fort Niagara, Sturgeon Point, Ripley, Youngstown, Wanakah, Lewiston, Dunkirk, Athol Springs, Bayview, and Sunset Bay.

For the following areas. Lake Erie from Ripely to the Buffalo Harbor. Lake Ontario from the Niagara River to Olcott. The Upper and Lower Niagara River and Buffalo Harbor. At 316 AM EDT, strong thunderstorms were located along a line extending from near Fort Niagara to 12 nm northwest of Lake Erie Beach to near Ripley, moving east at 25 knots. HAZARD. Wind gusts to 40 knots and small hail. SOURCE. Radar indicated. IMPACT. Small craft could be damaged in briefly higher winds and suddenly higher waves. Locations impacted include. Van Buren Point, Small Boat Harbor, Lake Erie Beach, Grand Island, Barcelona, Olcott, Woodlawn Beach, Erie Basin Marina, Wilson, Fort Niagara, Sturgeon Point, Ripley, Youngstown, Wanakah, Lewiston, Dunkirk, Athol Springs, Bayview, and Sunset Bay.

* WHAT. Heat index values of 100 to 104 degrees are expected at times this week with variability each day due to clouds and scattered showers and storms. * WHERE. Portions of north central, northeast, and northwest Ohio and northwest Pennsylvania. * WHEN. Until 8 PM EDT Saturday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses. The prolonged nature of the heat may increase heat stress with time.

* WHAT. Heat index values in the mid 90s. * WHERE. All of western New York. * WHEN. Until 8 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat related illnesses to occur.

* WHAT. Heat index values ranging from 100 to 105 degrees during the day. * WHERE. Portions of east central Ohio, northwest, southwest, and western Pennsylvania, and northern and the northern panhandle of West Virginia. * WHEN. Until 8 PM EDT Saturday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values up to 100. * WHERE. Central Pennsylvania. * WHEN. Until 8 PM EDT Saturday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.