Moderate

Satellite imagery, traffic cameras, and surface observations indicate patch dense fog is occurring or may develop in portions of Okeechobee County, reducing visibility to less a mile at times. Motorists should be alert for sudden changes in visibility. When encountering fog, slow down, increase following distance, and use low-beam headlights.

* WHAT...Freezing temperatures as low as 32 expected. * WHERE...In Virginia, Western Highland County. In West Virginia, Western Grant and Western Pendleton Counties. * WHEN...Until 8 AM EDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Take steps now to protect tender plants from the cold.

* WHAT...Visibility as low as one quarter mile or less in dense fog. * WHERE...Laramie Valley. * WHEN...Until 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.

At 428 AM CDT, Doppler radar was tracking a strong thunderstorm over Daisetta, or 10 miles east of Liberty, moving east at 55 mph. HAZARD...Pea size hail. SOURCE...Radar indicated. IMPACT...Minor hail damage to vegetation is possible. Locations impacted include... Liberty, Dayton, northwestern Mont Belvieu, Old River-Winfree, Ames, Daisetta, Hardin, Kenefick, Devers, and Dayton Lakes. If outdoors, consider seeking shelter inside a building.

* WHAT...Sub-freezing temperatures as low as 28 expected. Urban areas around Idaho Falls and Pocatello will likely remain near, or just above, freezing. * WHERE...Arco/Mud Lake Desert, Lower Snake River Plain, and Upper Snake River Plain. * WHEN...Until 9 AM MDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Take steps now to protect tender plants from the cold.

* WHAT...Moderate risk of sneaker waves expected. * WHERE...South Central Oregon Coast and Curry County Coast. * WHEN...From 11 PM PDT Saturday evening through 11 AM PDT Sunday morning. * IMPACTS...Sneaker waves can run up significantly farther on beaches than normal, including over rocks and jetties. These waves can suddenly knock people off of their feet and sweep them into the ocean. The waves can also move logs or other objects which could crush or trap anyone caught underneath.

* WHAT...Snow. Additional snow accumulations between 4 and 8 inches. * WHERE...Northwestern Fremont County Above 8500 Feet, Western Mosquito Range/East Chaffee County Above 9000 Feet, and Western Mosquito Range/East Lake County Above 11000 Feet. * WHEN...Until noon MDT today. * IMPACTS...Travel could be difficult, especially over mountain passes, with wet, slushy and snowpacked roads. Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.

* WHAT...Snow. Additional snow accumulations between 2 and 4 inches, with highest amounts along higher terrain. * WHERE...Wet Mountain Valley. * WHEN...Until noon MDT today. * IMPACTS...Travel could be difficult, with wet, slushy and snowpacked roads. Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.

At 329 AM CDT, Doppler radar was tracking a strong thunderstorm over Sealy, moving northeast at 45 mph. HAZARD...Wind gusts up to 40 mph and pea 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... Sugar Land, Rosenberg, Katy, Richmond, Sealy, Hempstead, Prairie View, Brookshire, Bellville, Eagle Lake, Pecan Grove, Mission Bend,

At 340 AM CDT, Doppler radar was tracking a strong thunderstorm near Kingwood, moving east at 30 mph. HAZARD...Pea size hail. SOURCE...Radar indicated. IMPACT...Minor hail damage to vegetation is possible. Locations impacted include... Humble, Greater Greenspoint, Spring, Kingwood, Aldine, The Woodlands, Crosby, Splendora, Patton Village, Roman Forest, Woodbranch, Plum Grove, Bush Intercontinental Airport, Atascocita, Lake Houston, Hurricane Harbor Splashtown, Porter Heights, Willowbrook, New Caney,