Category: Forecasting

Final AR storm system then new pattern emerges

Tomer’s Take: The final storm system loaded with atmospheric river (AR) moisture is moving through CA. It’s a southern track low headed for AZ, NM, UT, and CO with moderate to heavy snow accumulation. What happens after this? Higher atmospheric pressures build across the Pacific/West Coast pushing the jet stream north where it favors the […]

Pattern through late January

Tomer’s Take: The final atmospheric river (AR) surge is underway with big totals across the West. What happens after? A transition occurs with a high pressure ridge building. My forecast video 1/13: Current Setup Infrared satellite shows the Pineapple Express and remaining two areas of low pressure. Forecast Pattern Forecast jet stream valid 1/22. Notice […]

One more AR surge then new pattern emerges

Tomer’s Take: One more large atmospheric river (AR) surge occurs through 1/17 then the pattern shifts through late January with high pressure ridging. My forecast video 1/12: Mammoth Mountain is crystal clear this morning after about 7.5 feet of snow in the last few days. I’m forecasting another 2-3 feet with the next AR surge. […]

The final AR surge; Late January Outlook

Tomer’s Take: 1-2 additional atmospheric river surges are likely through 1/17 then it fades. A high pressure ridge is possible across the West on/after 1/22, but some places might actually be favored for snowfall. Snowbird, UT is reporting 36 inches in 48 hours. Mammoth Mountain, CA is reporting 72 inches in 72 hours. My afternoon […]

River continues through 1/17 then fades; Big totals continue

Tomer’s Take: Feet of snow accumulation continues in CA with a moderate to strong intensity atmospheric river (AR) surge through 1/10. The next surge occurs 1/14-1/17. Snow from both AR’s hit UT, WY, ID, CO. My afternoon mountain weather update video with new numbers: Mammoth Mountain is reporting 31-46 inches of new snow. Additional snow […]

Snow forecast through 1/18

Tomer’s Take: The atmospheric river (AR) continues through 1/16 then fades. The next two AR surges deliver feet of snow to the West. Heavy snow continues in the Sierra through 1/10 with a moderate to strong AR surge. Snow levels run abnormally high on 1/9 then gradually fall. Mammoth Mountain is reporting 14-18 inches of […]

River through 1/16 then fades to zero

Tomer’s Take: The atmospheric river (AR) runs through 1/16 then fades to zero. I’m forecasting big snow totals in CA, PNW, BC, parts of ID, parts of MT, WY, UT, and the Western Slope of CO. My forecast video 1/8: Current Setup Water vapor satellite shows the Pineapple Express flow and remaining areas of low […]

3-4 more AR surges to go; Snow totals through 1/16

Tomer’s Take: I’m forecasting 3-4 additional atmospheric river (AR) surges through 1/16. Sierra snow levels will run abnormally high with the biggest accumulation above 7,000ft. My forecast video 1/7: Current Setup Water vapor satellite shows the Pineapple Express and low pressure systems lined-up through 1/16. Forecast Pattern Forecast jet stream valid 1/9. This is a […]

Three more AR surges through 1/15 then it fades

Tomer’s Take: I’m forecasting three more atmospheric river (AR) surges through 1/15. Beyond 1/15 the atmospheric river is much weaker and fading. Snow levels will run high 1/7-1/10. Best Sierra snow stays above 7,000ft. Alta, UT is reporting 11″ in the last 24 hours. The pushes them up to 319″ for the season. Current Setup […]

Snow forecast through 1/14

Tomer’s Take: A monster storm system loaded with atmospheric river (AR) continues today in CA, WA, OR with 100mph wind and high snow levels. Part of that moisture then moves into the interior Rockies including NV, UT, ID, WY, and CO. There are three additional weak to moderate intensity AR surges through 1/14. My afternoon […]