Moderate

* WHAT...Heat index values up to 105 expected. * WHERE...Grundy, Hamilton, Hardin, Webster, Black Hawk, Calhoun, and Sac Counties. * WHEN...From 1 PM this afternoon to 7 PM CDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...While heat index values may not reach 105 degrees each day, the combination of the longevity of the heat and little or limited relief during the overnight periods with warm lows have prompted the multi-day Heat Advisory.

* WHAT...Heat index values up to 105 expected. * WHERE...Boone, Marshall, Story, Tama, Carroll, Crawford, and Greene Counties. * WHEN...From 1 PM this afternoon to 7 PM CDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...While heat index values may not reach 105 degrees each day, the combination of the longevity of the heat and little or limited relief during the overnight periods with warm lows have prompted the multi-day Heat Advisory.

* WHAT...Heat index values up to 102 expected. * WHERE...In Iowa, Clayton and Fayette Counties. In Wisconsin, Grant County. * WHEN...From 1 PM this afternoon to 7 PM CDT 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.

At 348 AM EDT, Doppler radar was tracking strong thunderstorms along a line extending from near Sparta to 5 miles north of Lowell to 6 miles northeast of Freeport. Movement was east at 20 mph. HAZARD...Winds in excess of 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... Ionia... Greenville... Portland...

* WHAT...Peak heat index values this afternoon of 100 to locally 110 degrees. * WHERE...In Illinois, Livingston, Ford, Iroquois, La Salle, Grundy, and Kankakee Counties. In Indiana, Benton, Jasper, and Newton Counties. * WHEN...Until 10 PM CDT 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...Peak heat index values this afternoon of 100 to locally 110 degrees. * WHERE...Portions of north central and northeast Illinois and northwest Indiana. * WHEN...Until 10 PM CDT 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...Heat index values of 100 to 105. * WHERE...Portions of northwest Illinois and east central and northeast Iowa. * WHEN...Until 7 PM CDT 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning

* WHAT...Heat index values of 105 to 109 degrees. * WHERE...Portions of central, east central, eastern, south central, and southeast Virginia. * WHEN...From 11 AM this morning to 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...Heat index values of 105 to 109 degrees. * WHERE...Bertie, Camden, Chowan, Eastern Currituck, Gates, Hertford, Northampton, Pasquotank, Perquimans, and Western Currituck Counties. * WHEN...From 11 AM this morning to 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.

At 245 AM EDT, Doppler radar was tracking a strong thunderstorm over Brookhaven National Laboratory, or over Manorville, moving east at 25 mph. HAZARD...Wind gusts up to 50 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Riverhead, Manorville, Center Moriches, Westhampton, Mastic, Mastic Beach, Calverton, Brookhaven National Laboratory, Hampton Bays, East