Moderate

* WHAT...Heat index values up to 105 expected. * WHERE...Central and western Iowa. * WHEN...From 1 PM to 9 PM CDT Tuesday. * 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...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Carlton, South and Central St. Louis, Cook and Lake Counties. In Wisconsin, Ashland, Bayfield, and Douglas Counties. This includes the Tribal Lands of the Bad River Reservation, the Bois Forte Band, Lake Vermilion area, the Grand Portage Reservation, the Fond du Lac Band and the Red Cliff Band. Other locations including Madeline Island and the Apostle Islands National Lakeshore. This also includes the Boundary Waters eastern

At 216 PM CDT, Doppler radar was tracking a strong thunderstorm over Curtis, moving northeast at 30 mph. HAZARD...Wind gusts up to 40 mph and nickel 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... Curtis and Moorefield. This includes Highway 83 between mile markers 43 and 44. If outdoors, consider seeking shelter inside a building.

A cold front shifting through East Idaho during the overnight hours will produce brief strong gusty winds with gust potential around 45 mph across the Snake Plain and adjacent areas. The strongest winds are expected between 1 AM and 5 AM. Showers and a thunderstorm or two may also accompany the front with light precipitation.

* WHAT...Heat index values up to 107 expected. * WHERE...Portions of east central and northeast Kansas. * WHEN...From noon to 9 PM CDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat cramps, heat exhaustion, and even heat stroke. 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...Heat index values up to 107 expected. * WHERE...Dickinson, Morris, Clay, Cloud, Ottawa, Republic, Washington, Brown, Marshall, and Nemaha Counties. * WHEN...From noon to 9 PM CDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat cramps, heat exhaustion, and even heat stroke. 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.

At 251 PM EDT, a strong thunderstorm was over Douglasville. This storm was nearly stationary. HAZARD...Heavy rain. SOURCE...Radar indicated. IMPACT...Heavy rain may cause temporary street flooding especially in poor drainage areas. Locations impacted include... Douglasville, City of South Fulton, Powder Springs, Austell, Hiram, Lithia Springs, Sweetwater Creek State Park, Brownsville, Jim R Miller Park, Chapel Hill, Six Flags Over Georgia, Sandtown, and Mableton.

* WHAT...Heat index values up to 105 expected. * WHERE...Portions of southern Illinois, western Kentucky, and southeast Missouri. * WHEN...From 11 AM to 8 PM CDT Tuesday. * 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.

No tsunami threat is forecast in South Florida due to the magnitude 6.4 earthquake reported around 200 PM EDT off the western coast of Cuba. Visit tsunami.gov for more information.

* WHAT...South gales 25 to 35 kt with gusts up to 45 kt and very steep and hazardous wind driven seas 10 to 13 ft. Winds ease this afternoon, becoming west-southwest 20 to 25 kt with gusts to 30 kt, but seas remain very steep 9 to 11 ft through tonight. Steep seas persist through Tuesday morning, but lower some to 8 to 10 ft. * WHERE...All areas through this evening. Very steep seas linger through tonight for areas north of Bandon, then steep seas are expected for all areas.