Moderate

* WHAT...Heat index values up to 99 expected. * WHERE...Champlain Valley. * WHEN...From noon to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

* WHAT...For the first Heat Advisory, heat index values up to 95. For the second Heat Advisory, heat index values up to 100 expected. * WHERE...Eastern Windsor County. * WHEN...For the first Heat Advisory, until 8 PM EDT this evening. For the second Heat Advisory, from noon to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...For the first Heat Advisory, heat index values up to 95. For the second Heat Advisory, heat index values up to 100 expected. * WHERE...Eastern Windsor County. * WHEN...For the first Heat Advisory, until 8 PM EDT this evening. For the second Heat Advisory, from noon to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Strong easterly wind gusts not associated with thunderstorms have developed across part of the Interstate 80 corridor in Illinois and portions of Bureau and Putnam counties. Spotters reported 55 to 65 MPH winds for 5 minutes in Princeton, Illinois just before 2 PM. These should persist through 3 to 4 PM. Expect temporary difficult driving conditions for high profile vehicles.

At 308 PM EDT, Doppler radar was tracking a strong thunderstorm 10 miles west of Jackson Mill, or 12 miles northwest of Weston, moving east at 30 mph. HAZARD...Wind gusts up to 50 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Clarksburg, Weston, Jackson Mill, West Milford, Lost Creek, Jane Lew,

* WHAT...High wave action, strong currents, and dangerous swimming conditions expected. Piers may be heavily swamped by waves. * WHERE...Mason, Oceana, Muskegon, Ottawa, Allegan and Van Buren counties. * WHEN...From this evening through Friday morning. * IMPACTS...Strong currents can pull swimmers into deeper water and high waves can sweep people off piers. * ADDITIONAL DETAILS...Winds will increase this evening out of the southwest building waves to 3 to 6 feet tonight. The waves

At 309 PM EDT, Doppler radar was tracking a strong thunderstorm near Pennsboro, or 9 miles northeast of Harrisville, moving east at 40 mph. HAZARD...Wind gusts up to 50 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Salem, Pennsboro, West Union, Alma, Greenwood, Smithburg, Wick, Mountain, Lima, Hebron, Center Point, Sedalia, Canton, and Blandville.

At 314 PM EDT, Doppler radar was tracking a strong thunderstorm over Millerton, or 16 miles southwest of Great Barrington, moving southeast at 20 mph. HAZARD...Wind gusts up to 40 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Sharon, Pine Plains, Millerton, Falls Village, Bethel, Salisbury, Huntsville, Pachin Mills, Whitehouse Crossing, Ancramdale, South

At 315 PM EDT, Doppler radar was tracking a strong thunderstorm near Newton, or near Maiden, moving southeast at 10 mph. HAZARD...Wind gusts up to 40 mph and half inch hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to outdoor objects is possible. Locations impacted include... Newton, Maiden, Startown, and Bandys. If outdoors, consider seeking shelter inside a building.

* WHAT...For both Heat Advisories, heat index values up to 107. * WHERE...Portions of DC, central, northeast, northern, and southern Maryland, and central and northern Virginia. * WHEN...For the first Heat Advisory, until 8 PM EDT this evening. For the second Heat Advisory, from 11 AM to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.