Moderate

* WHAT...Snow expected. Total snow accumulations of a coating to 3 inches for elevations up to 9,000 feet. Snow accumulations of 3 to 12 inches are expected across elevations of 9,000 feet and above. * WHERE...Wind River Mountains East and Wind River Mountains West. * WHEN...Until 6 AM MDT Wednesday. The time of maximum impact is most likely Tuesday afternoon into Tuesday night. * IMPACTS...Travel could be difficult especially across the backcountry. The hazardous conditions may impact the commutes across South Pass.

* WHAT...Visibility as low as one quarter of a mile in dense fog. * WHERE...Portions of central, north central, and southwest Montana. * WHEN...Until noon MDT today. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Below freezing temperatures may lead to a glaze of ice on surfaces, most notably on bridges and overpasses. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

Areas of fog developed early this morning across Door and Kewaunee counties. The fog was locally dense in spots, as the Sturgeon Bay Airport recorded a visibility of 1/4 mile. If you have travel plans early this morning, be on alert for rapidly changing or poor visibilities as low as 1/4 mile or less in spots. Plan on extra time to reach your destination and allow extra room between you and the car in front of you. Visibilities should begin to improve towards sunrise as winds shift to the northwest and increase.

Clear skies, light winds, and lingering low-level moisture are helping areas of valley fog to develop and become dense early this morning. This fog will continue to expand through the night but likely remain the densest in the valleys. Visibilities will be below a quarter of a mile at times in the thickest of the fog. Be sure to slow down and use your low beam headlights when you encounter any fog.

* WHAT...Visibility as low as 1/4 mile in dense fog. * WHERE...Sheboygan County. * WHEN...Until 6 AM CDT early this morning. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Worst visibility conditions are expected across the eastern half of the county. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

* WHAT...Visibility around a quarter of a mile or less in dense fog. * WHERE...Manitowoc County. * WHEN...Until 6 AM CDT early this morning. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...The Manitowoc County Sheriff Department was reporting dense fog across the county. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

Areas of fog have developed across portions of the Tennessee Valley this morning, especially in river valleys and near lakes. Visibility will be less than one-quarter mile at times. Slow down, use low beam headlights, and allow for extra distance between yourself and other motorists if encountering fog during the morning commute.

* WHAT...Snow. Additional snow accumulations between 5 and 10 inches. * WHERE...Ruby Mountains and East Humboldt Range in Elko County. * WHEN...Until 5 PM PDT Tuesday afternoon. * IMPACTS...Travel could be difficult. 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...Visibility down to 1/4 mile in dense fog. * WHERE...Petersburg Borough. * WHEN...Until 11 AM AKDT Tuesday. * IMPACTS...Low visibility could make travel conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

* WHAT...North winds 20 to 30 kt with a few gusts up to 40 kt and steep to very steep wind-driven seas of 8 to 12 ft. Winds ease to 10 to 20 kt and seas gradually subside to 6 to 8 ft Monday night and Tuesday, but seas remain hazardous to small craft. * WHERE...All areas, with the strongest winds and steepest seas from around Port Orford southward. * WHEN...For the Small Craft Advisory, until 11 PM PDT Wednesday. For the Hazardous Seas Warning, until 11 PM PDT this evening.