Moderate

* WHAT...Visibility as low as one quarter of a mile in dense fog. * WHERE...Portions of central, north central, and southwest Montana. * WHEN...From 9 PM this evening to noon MDT Tuesday. * 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.

* WHAT...Dangerous rip currents. * WHERE...Gulf-facing beaches, including the Matagorda Peninsula, Brazoria County beaches, Galveston Island and the Bolivar Peninsula. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water. Swim near a lifeguard and away from rocks, jetties, and piers. 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

The combination of record-high temperatures and elevated humidity levels will produce heat index values in the upper 90s to lower 100s Tuesday afternoon across much of southeast Missouri, southwest Illinois, and far western Kentucky. Those planning to be outdoors for extended periods on Tuesday should follow heat safety measures, such as staying hydrated and taking frequent breaks in a shaded or air-conditioned location.

* WHAT...Snow expected. Total snow accumulations between 5 and 10 inches. * WHERE...Ruby Mountains and East Humboldt Range in Elko County. * WHEN...From 5 PM this afternoon to 5 PM PDT Tuesday. * 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.

At 251 PM AST, Doppler radar was tracking a line of strong thunderstorms between Arecibo and Quebradillas, moving northwest at 10 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 damage to outdoor objects is possible. Locations impacted include... Arecibo, Camuy, Hatillo, Quebradillas, Isabela, Rafael Gonzalez, Rafael Capo, Bajadero, San Antonio, Piedra Gorda, Quebrada,

At 1158 AM MST, Doppler radar was tracking a line of showers extending from over Cave Creek to near Carefree, or extending from 7 miles east of New River to 7 miles northwest of Scottsdale, moving northeast at 30 mph. HAZARD...Landspouts and wind gusts up to 40 mph. SOURCE...Radar indicated. IMPACT...Minor damage to outdoor objects is possible. Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include...

Thursday into the weekend, a series of low pressure systems will move toward Southeast Alaska, bringing widespread moderate to heavy rainfall and gale force winds to the Gulf. Strong winds are also expected for coastal communities. While the exact timing and impacts of the system are still being refined, confidence is continuing to increase that this will be a more impactful system for Southeast Alaska. Stay tuned to weather.gov/juneau as we continue to monitor the developing situation and update our forecast.

* 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. * IMPACTS...Travel could be difficult especially across the backcountry. The hazardous conditions may impact the commutes across South Pass. * ADDITIONAL DETAILS...Snow accumulations of a coating to an inch

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Deuel, Grant, Marshall, and Roberts Counties. * WHEN...Until 4 PM CDT this afternoon. * IMPACTS...Low visibility could make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

* WHAT...For the Beach Hazards Statement, dangerous rip currents and elevated surf are expected. For the Coastal Flood Advisory, minor to moderate coastal flooding can be expected near times of high tide. * WHERE...Malibu Coast and Los Angeles County Beaches. * WHEN...For the Coastal Flood Advisory, until 2 PM PDT Tuesday. For the Beach Hazards Statement, through Tuesday afternoon. * IMPACTS...Minor to moderate flooding of sea water is likely around high tide at low-lying beach and harbor areas that is