Moderate

At 244 PM MDT, Doppler radar was tracking a line of strong thunderstorm 7 miles southeast of Columbia Falls, or 9 miles northeast of Evergreen, moving north at 45 mph. HAZARD...Wind gusts 30 to 40 mph and penny size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Kalispell, Evergreen, Whitefish, Columbia Falls, West Glacier,

At 244 PM MDT, Doppler radar was tracking a cluster of strong thunderstorms 19 miles east of Geraldine, or 37 miles northeast of Stanford, moving north 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... Judith Landing and Iliad. If outdoors, consider seeking shelter inside a building.

* WHAT...Heat index values up to 109 degrees is expected. * WHERE...Portions of East Arkansas, North Mississippi, Southeast Missouri, and West Tennessee. * WHEN...Until 8 PM CDT Saturday. * 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.

Showers and thunderstorms could create sudden, gusty winds along Interstate 80 this afternoon and evening. Wind gusts up to 60 mph will be possible in and around these showers. Use caution if traveling and keep both hands on the wheel, especially if in lightweight and/or high profile vehicles.

At 432 PM EDT, Doppler radar was tracking a strong thunderstorm near Alligator Lake, or 30 miles southeast of Plymouth. This thunderstorm was nearly stationary. 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... Fairfield, Kilkenny, Killkenny, and Alligator Lake. If outdoors, consider seeking shelter inside a building. Frequent cloud to ground lightning is occurring with this storm.

At 233 PM MDT, Doppler radar was tracking a strong thunderstorm 11 miles southeast of Highwood, or 22 miles south of Fort Benton, moving north at 30 mph. HAZARD...Wind gusts up to 50 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 vegetation is possible. Locations impacted include... Shonkin. If outdoors, consider seeking shelter inside a building.

* WHAT...Heat index values up to 105 expected. * WHERE...Portions of southern Maryland, central, northern, and northwest Virginia, and panhandle West Virginia. * WHEN...From 11 AM to 7 PM EDT Thursday. * 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

* WHAT...Heat index values up to 100. * WHERE...In Virginia, Augusta, Eastern Highland, and Rockingham Counties. In West Virginia, Eastern Grant and Eastern Pendleton Counties. * WHEN...Until 8 PM EDT this evening. * 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 102. For the second Heat Advisory, heat index values up to 105 expected. * WHERE...Albemarle and Nelson Counties. * WHEN...For the first Heat Advisory, until 8 PM EDT this evening. For the second Heat Advisory, from 11 AM to 7 PM EDT Thursday. * 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 102. For the second Heat Advisory, heat index values up to 105 expected. * WHERE...Albemarle and Nelson Counties. * WHEN...For the first Heat Advisory, until 8 PM EDT this evening. For the second Heat Advisory, from 11 AM to 7 PM EDT Thursday. * 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.