Moderate

* WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 4 to 6 ft expected. * WHERE...Lake County IL. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures.

* WHAT...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. * WHERE...All of Puerto Rico, including Vieques and Culebra, and the U.S. Virgin Islands. * WHEN...Until 5 PM AST this afternoon. * IMPACTS...High temperatures or elevated heat indices can worsen symptoms in people with chronic conditions. They can also increase the risk of heat-related illness among individuals sensitive to

At 730 AM MDT, Doppler radar was tracking a strong thunderstorm 10 miles southeast of Lake Valley, or 19 miles north of Crownpoint, moving northeast at 25 mph. HAZARD...Wind gusts up to 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... Chaco Canyon. Persons in campgrounds should consider seeking sturdy shelter until this storm passes.

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Cottonwood, Lincoln, Lyon, Murray, and Pipestone Counties. * WHEN...Until 10 AM CDT 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.

Strong winds are expected to increase across the Aleutians East Saturday afternoon around 1 PM AKDT before diminishing Sunday morning. The strongest winds are expected from late Saturday afternoon through early Sunday morning. Sand Point: Winds 25 to 35 mph with gusts up to 40 mph. Cold Bay: Winds 30 to 40 mph with gusts up 60 mph. King Cove: Winds 30 to 40 mph with gusts up to 60 mph. False Pass: Winds 30 to 40 mph with gusts up to 60 mph. For Cold Bay, King Cove and False Pass there is a low chance

* WHAT...Southeast winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...City and Borough of Yakutat. * WHEN...From 4 AM to 4 PM AKDT Sunday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * ADDITIONAL DETAILS...Winds will quickly increase as a strong low pressure system moves into the northern gulf. Confidence is high that wind gusts will reach near 40 to 50 mph, but confidence

At 705 AM CDT, Doppler radar was tracking heavy rain producing thunderstorms along a line extending from near Emerson to near Reynolds. Movement was east at 25 mph. HAZARD...Minor flooding. SOURCE...Radar indicated. IMPACT...Slowing or redirecting of traffic due to ponding or flowing water. Closure of waterfront access due to flooding. Locations impacted include... Davenport, Moline, Rock Island, Bettendorf, Clinton, East Moline, Sterling, Rock Falls, Morrison, Cambridge, Silvis, Geneseo, Eldridge,

Areas of fog will reduce the visibility to one quarter mile at times in parts of southwest and south central North Dakota this morning. This includes areas along and south of the I-94 corridor. Motorists should be prepared for rapidly changing visibilities. Use your low beam headlights and be extra cautious at intersections and railroad crossings. Low visibilities are expected to improve by around mid-morning.

At 915 PM ChST, Doppler radar was tracking a strong thunderstorm over the west coast of Guam. This thunderstorm is moving east at 10 mph. HAZARD...Wind gusts up to 40 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. If outdoors, consider seeking shelter inside a building. Torrential rainfall is also occurring with this storm and may lead to localized flooding. Do not drive your vehicle through flooded roadways.

* WHAT...Heat index values up to 105. * WHERE...Portions of Indiana and north central, northwest, and south central Kentucky. * WHEN...Until 8 PM EDT /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. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in