Moderate

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Parts of western and central North Dakota. * WHEN...Until 10 AM CDT /9 AM MDT/ 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...Southeast winds 25 to 35 mph with gusts of 50 to 55 mph. * WHERE...Chautauqua County. The strongest winds will be near the Lake Erie shore and along the northwest slope of the Chautauqua Ridge. * WHEN...Until 2 AM EDT Sunday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few isolated power outages may result. The southeast winds will be a crosswind on the New York State Thruway for high profile vehicles.

At 828 AM CDT, Doppler radar was tracking a line of strong thunderstorms extending from over Etoile to 27 miles southwest of Pineland, or extending from 17 miles east of Lufkin to 42 miles southeast of Diboll, moving northeast at 25 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 damage to outdoor objects is possible. Locations impacted include...

At 837 AM CDT, Doppler radar was tracking a line of strong thunderstorms extending from 13 miles north of Gillham to 9 miles south of Plain Dealing, or extending from 16 miles west of Umpire to 18 miles southwest of Springhill, moving northeast at 30 mph. HAZARD...Wind gusts up to 40 mph and half inch 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...

* WHAT...Dangerous rip currents. * WHERE...Coastal Palm Beach County. * WHEN...Through Tuesday evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.

* WHAT...Dangerous rip currents. * WHERE...Coastal Broward County and Coastal Miami Dade County. * WHEN...Through Tuesday evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.

* WHAT...High swim risk from high wave action and strong currents. Dangerous swimming conditions are expected. * WHERE...Macomb and Wayne Counties. * WHEN...Through this afternoon. * IMPACTS...Strong currents can pull swimmers into deep water and prevent return to shore. Remain out of the water to avoid hazardous swimming conditions.

* WHAT...High swim risk from high wave action and strong currents. Dangerous swimming conditions are expected. * WHERE...Huron, Sanilac and St. Clair Counties. * WHEN...Through Saturday evening. * IMPACTS...Strong currents can pull swimmers into deep water and prevent return to shore. Remain out of the water to avoid hazardous swimming conditions.

* WHAT...High swim risk from high wave action and strong currents. Dangerous swimming conditions are expected. * WHERE...Bay County. * WHEN...Through Saturday evening. * IMPACTS...Strong currents can pull swimmers into deep water and prevent return to shore. Remain out of the water to avoid hazardous swimming conditions.

* WHAT...High swim risk from high wave action and strong currents. Dangerous swimming conditions are expected. * WHERE...Monroe County. * WHEN...Until 4 PM EDT this afternoon. * IMPACTS...Strong currents can pull swimmers into deep water and prevent return to shore. Remain out of the water to avoid hazardous swimming conditions.