An unusually cold airmass will move over the area Thursday and remain in place through early Saturday. Temperatures will fall below freezing both Thursday night and Friday night, but how cold the temperatures get and where freezing conditions occur will be highly dependent on cloud cover.
Those planning on traveling to the mountains late Monday or early Tuesday should expect some snowfall that will reduce visibility and could impact roadways at times. Generally 1 to 3 inches of snow is expected at elevations above 5500 feet and this includes portions of the Cascades, Siskiyous, and Warner Mountains. Snow is expected Monday and Tuesday afternoons as well but impacts are not expected to be as significant due to the late May sun angle and warm road temperatures.
The National Weather Service in Medford, Ore. has issued a flood warning for the Sprague River near Beatty, Ore through late tonight (April 10, 2019). As of 8:00 AM the river was at 8.4 feet. Flood stage is 8.5 feet. Minor flooding is in the forecast.
Extensive runoff is likely due to excessive rainfall and snowmelt. Rises are expected on all creeks, streams and rivers, with flooding possible. Main stem flooding is possible on the Sprague River near Beatty by Tuesday.
Storm total rainfall amounts are expected to be 1 to 2 inches, with up to 3 inches possible in the mountains.
A late season atmospheric river will take aim at southern Oregon and Northern California this weekend.
The heaviest rainfall rates are expected Sunday morning through early Monday afternoon, with precipitation totals well above what would typically be seen this time of year.
A disturbance will bring more snow to the Mt Shasta, Trinity Alps, Siskiyous and Cascade regions
Snow will occur above 4500 feet with the most significant accumulations above 5000 feet. We have issued a winter storm watch because of the potential for significant snow accumulation above 5000 feet in the regions mentioned already.
If you are planning to travel above 4500 feet Tuesday night or Wednesday, be prepared to encounter snow during your travels.
Heaviest snow is expected Tuesday afternoon through Tuesday night. Gusty winds will create drifts and occasional whiteout conditions in exposed areas. Plan on difficult travel conditions, including during the evening commute.
Winter Storm Watch upgraded to Winter Storm Warning
A storm with a significant amount of moisture will bring moderate to heavy mountain snow to the Cascades, mountains in Western Siskiyou County, and possibly portions of the East Side Saturday night into at least Monday morning.
Moist tropical air will pour into the Pacific Northwest this weekend and the start of next week. Most of the rain and snow accumulation will occur Sunday into Monday when the atmospheric river is aided by a strong front draped over the region. Overall, look for a rainy end of February if you’re staying in the westside valleys.
The cold wet weather isn’t over!
Another system will move in from the north, bringing colder air and more precipitation. Snow is expected at lower elevations with the greatest amounts (and confidence) above 2000 feet. If you have travel plans Tuesday night and Wednesday, be prepared for wintry travel and stay tuned to the forecast for updates. A Winter Weather Advisory is in effect from 7 pm Tuesday through 10 pm Wednesday.
Snow levels are lowering again, expect more travel difficulties for the major passes. Overall snow amounts are expected to be less than what occurred Tuesday night. Showers will continue through the weekend, and snow levels will be low enough to affect all area passes, and possibly even west side valley floors.
Tuesday’s storm brought wet heavy snow to much of Southern Oregon and Northern California. Measurable snow was seen as far south as Cottonwood, California, 11 miles south of Redding.
For much of the Tuesday night into mid-day Wednesday, Interstate 5 was closed to semi trucks at the Oregon-California boarder to just north of Redding. Vehicles were allowed through if they met certain winter weather criteria (such as caring or using chains).
From Tuesday afternoon through Wednesday morning Klamath Falls officially received 7.5” of heavy wet snow. Unofficially many locations in town received higher snow totals. Levels were great enough that all schools, with the exception of Butte Valley and Tulelake, and many small businesses called in a ‘Snow Day’.
Heavy snow from the Mount Shasta area is spilling in the southern Shasta Valley this evening and is expected to continue overnight. The combination of heavy snow and wind there will create winter storms warning conditions.
A cold and wet frontal system will bring heavy snow and areas of blowing snow to the Cascades, Siskiyous, and Mount Shasta area later Tuesday through Wednesday afternoon. Light to moderate snow and blowing snow are also expected Tuesday night into Wednesday over much of the east side and Shasta Valley.
The National Weather Service is reporting, moderate to heavy snow is expected for our areas of Klamath, Lake, Modoc and Siskiyou Counties. Most of the entire Pacific Northwest will feel the effects of this winter storm. Within our region, locations above 4,500 feet are expected to receive heavier snow totals. Mountain passes could see up to 12 inches of snow. Higher elevations may see up to 24 inches.
Over the weekend it is forecasted that Crater Lake National Park can receive up to 18 inches of new snow during the upcoming storm. The extended forecast from the National Weather Service Office in Medford, Ore. also shows that today may be the last day for sunshine for some time. With that info, I took advantage of an opportunity to get out of the newsroom and use my snowshoes.
Winter Storm Warning for areas over 6,000 feet, Winter Storm Advisory for areas under 6,000 feet are both effect from midnight Friday night to 4:00 AM Sunday. For much of Southern Oregon and Northern California.Including Areas of Klamath, Lake, Modoc, Siskiyou, Jackson, Josephine, and Curry Counties.
The National Weather Service of Medford, Oregon has issued a Winter Weather Advisory for the areas of the Klamath Basin and Lake County from Sunday morning until Monday night.
Travel will be difficult with snow covered and slippery roadways. The hazardous travel could effect both the morning and evening commute. Gusty winds are expected and could cause hazards with blowing and drifting snow.
The prolonged period of almost spring like weather is going to come to end today. On the really bright side we are also going to be saying good bye to the fog in the mornings west of the Cascades. And if all of that is going away at this time of the year.....you KNOW what is coming next! We will see a return to stormy weather with rain and snow coming in.
UPDATE - 9:46 AM, 1/28/19
Air Stagnation Advisory remains in effect until 1:00 PM Tuesday, January 29, 2019.Poor mixing and light winds will keep stagnant conditions in place through Tuesday morning. Pollutants may be trapped near the ground level and this may result in reduced air quality at times.
The National Weather Service in Medford has issued an Air Stagnation Advisory which is in effect from 4 AM Friday to noon PST Monday for much of Southern Oregon. Plus a Freezing Fog Advisory for the Klamath Basin through 8 AM Friday.
Heavy snow and blowing snow expected. Total snow accumulations of 6 to 12 inches, with localized amounts up to 16 inches, are expected. Snow fall rates will increase again late this morning. Additional amounts of 6 to 10 inches, with localized amounts up to 14 inches, are expected.
Strong low pressure will move into the coast on Saturday and this will produce very strong winds over much of the east side and northern California. The strongest winds will be in the mountains and Shasta Valley, but east side valley locations will also see strong, gusty winds Saturday afternoon and evening.
The National Weather Service in Medford has issued an Air Stagnation Advisory which is in effect from 1 AM Tuesday to 10 PM PST Thursday. Air quality is expected to gradually deteriorate due to limited vertical mixing Tuesday through Friday morning as airborne particulates accumulate.
Light to moderate snow showers expected today and tonight in and just east of the Southern Oregon Cascades, then a strong low will bring periods moderate to locally heavy snow. Periods of moderate snow showers are expected today and tonight with snow levels around 4500 to 5000 feet.
Multiple Systems to bring extended period of steady snow accumulations.
Beginning late this afternoon into this evening, another system will bring more precipitation to the area with snow levels around 4500 feet. Another system will follow Sunday and a stronger system on Monday. Snow levels will hover around 4500 feet during this time period, resulting in an extended period of relatively steady snow accumulations. Impacts could be more significant due to increased traffic from holiday travel.
National Weather Service, Medford Oregon has issued a Winter Weather Advisory for areas of the Cascade Mountains through 10:00PM Today, December 20, 2018. NWS has also issued a High Wind Advisory for the Klamath Basin for the same period.
Another frontal system will bring moderate to strong winds to the coast this evening, the Shasta Valley tonight and some areas east of the Cascades late Tuesday morning.
The National Weather Service in Medford has replaced the High Wind Watch with a High Wind Warning...which is in effect from 10 AM to 10 PM PST Tuesday. A Wind Advisory has also been issued.
This Wind Advisory is in effect from 10 AM to 10 PM PST Tuesday.
The National Weather Service in Medford has issued a High Wind Warning. Which is in effect from 10 PM this evening to 10 PM PST Sunday.