Winter Weather Advisory issued December 11 at 3:20AM EST until December 11 at 2:00PM EST by NWS Jackson KY
Rain will transition to snow around sunrise this morning. This snow will then fall at a moderate to heavy rate for 2 to 4 hours before tapering off around midday. Most locations should receive one or less of accumulation, but places above 2,000 feet will likely be closer to 2 inches with some spots picking up as much as 3 inches. At lower elevations, snow accumulations will be limited by the warm air/road temperatures out ahead of this system. There, accumulations should be confined to grassy and elevated surfaces with visibility reduction being the primary impact on travel. However, on
Air Stagnation Advisory issued December 11 at 2:03AM MST until December 12 at 2:00PM MST by NWS Boise ID
* WHAT...An extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. * WHERE...Portions of southwest and west central Idaho and northeast and southeast Oregon. * WHEN...Until 2 PM MST /1 PM PST/ Thursday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
Air Stagnation Advisory issued December 10 at 3:19AM MST until December 12 at 2:00PM MST by NWS Boise ID
* WHAT...For the Air Stagnation Advisory, an extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. * WHERE...Portions of southwest and west central Idaho and southeast Oregon. * WHEN...For the Air Stagnation Advisory, until 2 PM MST Thursday. For the Dense Fog Advisory, until noon MST today. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous.
Wind Advisory issued December 9 at 1:52AM MST until December 9 at 2:00PM MST by NWS Rapid City SD
* WHAT...Northwest winds 25 to 35 mph with gusts up to 55 mph. * WHERE...Ziebach County, including portions of the Cheyenne River Reservation, Jackson County, including portions of the Pine Ridge Reservation, Northern Foothills, Rapid City, Pennington Co Plains, and Haakon. * WHEN...Until 2 PM MST this afternoon. * IMPACTS...Sudden wind gusts can cause drivers to lose control, especially in lightweight or high profile vehicles. Strong winds with light snow can cause reduced visibility.
High Wind Warning issued December 9 at 1:52AM MST until December 9 at 2:00PM MST by NWS Rapid City SD
* WHAT...Northwest winds 30 to 40 mph with gusts up to 60 mph. * WHERE...Butte, Harding, Northern Meade Co Plains, Northern Perkins, Southern Meade Co Plains, Southern Perkins, and Sturgis/Piedmont Foothills. * WHEN...Until 2 PM MST this afternoon. * IMPACTS...Travel could be difficult, especially for high profile vehicles. Sudden wind gusts can cause drivers to lose control, especially in lightweight or high profile vehicles. Strong winds with light snow can cause reduced visibility.
Air Stagnation Advisory issued December 9 at 3:14AM MST until December 12 at 2:00PM MST by NWS Boise ID
* WHAT...For the Air Stagnation Advisory, an extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. For the Dense Fog Advisory, visibility less than one quarter mile in dense fog. * WHERE...Portions of southwest Idaho and southeast Oregon. This includes Interstate 84 from Boise to Ontario and Highway 95 from Weiser to Council. * WHEN...For the Air Stagnation Advisory, until 2 PM MST Thursday. For the Dense Fog Advisory, until 11 AM MST this morning. * IMPACTS...Poor air quality may cause issues
High Wind Watch issued December 7 at 12:41PM MST until December 8 at 2:00PM MST by NWS Cheyenne WY
* WHAT...West winds 30 to 40 mph with gusts up to 65 mph possible. * WHERE...Central Laramie County and Laramie Valley. * WHEN...From late tonight through Sunday afternoon. * IMPACTS...Mainly to transportation. Strong cross winds will be hazardous to light weight or high profile vehicles, including campers and tractor trailers.
High Wind Warning issued December 7 at 12:41PM MST until December 8 at 2:00PM MST by NWS Cheyenne WY
* WHAT...West winds 25 to 35 mph with gusts up to 60 mph possible. * WHERE...Converse County Lower Elevations and East Platte County. * WHEN...From 2 AM to 2 PM MST Sunday. * IMPACTS...Mainly to transportation. Strong cross winds will be hazardous to light weight or high profile vehicles, including campers and tractor trailers.
Wind Advisory issued December 8 at 1:56AM MST until December 9 at 2:00PM MST by NWS Rapid City SD
* WHAT...Northwest winds 30 to 40 mph with gusts up to 55 mph expected. * WHERE...Portions of northwestern and southwestern South Dakota. * WHEN...From 11 AM this morning to 2 PM MST Monday. * IMPACTS...Sudden wind gusts can cause drivers to lose control, especially in lightweight or high profile vehicles. Strong winds can cause blowing dust, reduced visibility, and flying debris.
Red Flag Warning issued December 7 at 2:36PM PST until December 11 at 2:00PM PST by NWS Los Angeles/Oxnard CA
*** INCREASING POTENTIAL FOR HIGH END RED FLAG WARNING EVENT FOR PORTIONS OF LOS ANGELES AND VENTURA COUNTIES *** ...RED FLAG WARNING IN EFFECT FOR LOS ANGELES AND VENTURA COUNTY MOUNTAINS AND VALLEYS 10 AM MONDAY UNTIL 6 PM WEDNESDAY DUE TO MODERATE TO STRONG SANTA ANA WINDS AND VERY LOW HUMIDITIES... ...RED FLAG WARNING IN EFFECT FOR VENTURA COUNTY COAST AND MALIBU 2 PM MONDAY UNTIL 2 PM WEDNESDAY DUE TO MODERATE TO STRONG SANTA ANA WINDS AND VERY LOW HUMIDITIES... ...FIRE WEATHER WATCH IN EFFECT FOR SAN LUIS OBISPO COUNTY MOUNTAINS 10 PM MONDAY UNTIL 10 PM TUESDAY