Moderate

* WHAT...High wave action, strong currents, and dangerous swimming conditions expected. Piers may be heavily swamped by waves. * WHERE...Mason, Oceana and Muskegon counties. * WHEN...Through late tonight. * IMPACTS...Strong currents can pull swimmers into deeper water and high waves can sweep people off piers. * ADDITIONAL DETAILS...Southwest winds will increase to 15 to 25 mph today which will build waves into the 3 to 5 foot range. Dangerous waves and currents are expected today north of Grand

At 335 AM CDT, Doppler radar indicated strong thunderstorms along a line extending from 4 miles southwest of Chilocco to 3 miles north of Marland to 4 miles west of Red Rock to 2 miles north of Lucien to 3 miles southwest of Douglas. Movement was east southeast at 35 mph. HAZARD...Wind gusts up to 50 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down small tree limbs and blow around unsecured objects. Locations in or near the path include... Pawnee... Fairfax...

* WHAT...Moderate HeatRisk with temperatures between 90 and 95 for most areas, with some readings above 100 degrees. Hottest conditions across the East Bay Hills and Valleys. * WHERE...The Santa Clara Valley and Eastern Hills, and The East Bay Hills and Valleys. * WHEN...Until 7 PM PDT this evening. * IMPACTS...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Impacts possible in some health systems and in

* WHAT...Visibility of a quarter-mile or less in dense fog. * WHERE...Central Interior Cumberland and Interior York Counties. * WHEN...Until 7 AM EDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

* WHAT...Visibility of a quarter-mile or less in dense fog. * WHERE...Coastal Cumberland and Coastal York Counties. * WHEN...Until 7 AM EDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

* WHAT...Heat index values around 105. * WHERE...Portions of southeast Arkansas, northeast Louisiana, and central, north central, northwest, south central, southeast, southwest, and west central Mississippi. * WHEN...Until 8 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

* WHAT...South swell from 190 degrees with a period of 14 to 16 seconds will generate surf of 3 to 6 feet with sets up to 7 feet along south-facing beaches. High rip current risk. San Diego County Surf will be slightly lower, but hazardous swimming conditions with high rip current and longshore current risk will still exist. * WHERE...San Diego County Coastal Areas and Orange County Coastal Areas. * WHEN...From late tonight through Monday evening. * IMPACTS...Hazardous swimming conditions with high rip current

Calm winds and clear skies are helping temperatures drop, and with moisture remaining from yesterday's rain, patchy dense fog is expected over south central Kentucky. Visibility may drop to and below 1/4 mile. Conditions are expected to improve after sunrise.

Patchy dense fog has developed this morning. If driving this morning, remain alert for rapid changes in visibility.