Moderate

* WHAT...Heat index values of 102 to around 109 expected to continue. * WHERE...Northern Piedmont and northern Coastal Plain. * 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning

* WHAT...For the first Heat Advisory, heat index values up to 109. For the second Heat Advisory, heat index values up to 107 expected. * WHERE...Southern Piedmont, Sandhills, and the southern Coastal Plain. * WHEN...For the first Heat Advisory, until 8 PM EDT this evening. For the second Heat Advisory, from 11 AM to 8 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of

* WHAT...Heat index values up to 105. * WHERE...Portions of central and southern Iowa. * WHEN...Until 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. Drink plenty of fluids, stay in an air-conditioned room, stay out of

* WHAT...For the first Heat Advisory, heat index values up to 109. For the second Heat Advisory, heat index values up to 107 expected. * WHERE...Southern Piedmont, Sandhills, and the southern Coastal Plain. * WHEN...For the first Heat Advisory, until 8 PM EDT this evening. For the second Heat Advisory, from 11 AM to 8 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of

* WHAT...Visibility one quarter or less in dense fog. * WHERE...Ashland, Bayfield, and Iron Counties. * WHEN...From 10 PM this evening to 10 AM CDT Saturday. * IMPACTS...Low visibility could make driving conditions hazardous. If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.

At 207 PM EDT, Doppler radar was tracking a strong thunderstorm near Aurora, moving southeast 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... Bayard, Redhouse, Wilson, Wilsonia, and Beechwood. If outdoors, consider seeking shelter inside a building. A Severe Thunderstorm Watch remains in effect until 900 PM EDT for western Maryland...and eastern West Virginia.

At 213 PM EDT, Doppler radar was tracking a strong thunderstorm 8 miles south of Portland, moving east at 25 mph. HAZARD...Winds in excess of 40 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Union City. If outdoors, consider seeking shelter inside a building.

At 146 PM EDT, a strong thunderstorm was located near Coldwater, moving southeast at 20 mph. HAZARD...Wind gusts up to 50 mph, pea size hail, and frequent cloud-to-ground lightning. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Hail may cause minor damage to vegetation. Lightning can cause serious injury or death. Locations impacted include... Coldwater, St. Henry, Fort Recovery, Chickasaw, Burkettsville, Carthagena, and Maria Stein.

At 146 PM EDT, Doppler radar was tracking a strong thunderstorm near Hamlin, moving southeast at 20 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... Hamlin, Alum Creek, Griffithsville, Sweetland, Sod, Woodville, Alkol, and Yawkey. This includes Route 119 between mile markers 64 and 68. If outdoors, consider seeking shelter inside a building.

* WHAT...Increased threat of sneaker waves expected. * WHERE...Southwestern Humboldt and Coastal Mendocino Counties; especially for southern facing beaches. * WHEN...From late tonight through Monday evening. . * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath. Don't be fooled by an ocean that looks calm. There can be