After a weekend of dry, sunny weather, a low pressure storm system will move into our area late tonight. This system will be very quick-moving, but will drop rain and snow. The timing of the heaviest rain with this system will be from around 8 p.m. Sunday to 5 a.m. Monday. Areas that will see the heaviest rain will be the South Coast and west-side Valleys. Post frontal showers are expected to hang around until around 3 p.m. on Monday.
A large pool of cold air will move in after frontal passage. Snow levels will start around 4,500′ Sunday night. The front is slated to push through around midnight. The snow levels will drop dramatically. The upper Siskiyous and the Basin will see snow levels of 3,300′. The Cascades will see a snow level of 3,000′. The remaining showers will turn to snow and snowfall rates could be 1″ an hour or more.
Winds will also be strong in the Basin and Cascades. A WIND ADVISORY is in effect until 5 a.m. for Eastern Klamath, Lake, and Modoc Counties. Sustained winds will range from 25-35 mph and gusts could get as high as 55mph. The combination of snow and wind will cause blowing snow and hazardous driving conditions. A WINTER WEATHER ADVISORY will go into effect Sunday at 9 p.m and last until Monday at 4 a.m. Elevations above 4,500′ will see snow accumulations from 3″ to 7.” Driving conditions will be affected on roadways in these areas including:
- Hwy. 58 near Willamette Pass
- Hwy. 62 near Crater Lake
- Hwy. 66
- Hwy. 138 near Diamond Lake
- Hwy. 140 near Lake of the Woods
- Hwy 230
Winds along the coast will subside after frontal passage. The HIGH SURF ADVISORY will continue until 11 p.m. Sunday night. Rip currents and localized erosion will be the greatest hazard during high tide.
This system will move out of the area very quickly. All of the heaviest precipitation will end around 5 a.m. on Monday. After that, only light, isolated rain and snow showers will persist through the morning on Monday. All shower activity will diminish after 3 p.m. The clouds will start to clear out Monday night as high pressure builds back in to the area. Next week will see partly cloudy to mostly sunny skies. Temperatures will be around seasonal norm due to the cold air that will be ushered in on Monday.
Thanks for logging on and be safe out there!
Meteorologist Seth Phillips