Resorts are reporting 3-6 inches overnight from the band of snow that pushed through. It has continued to snow for a couple of hours this morning since the reports so we may add a little to the totals. At lake level we got a coating of snow, just enough to cover up the black snow.
The precip band is pushing South and is just about past South Lake. We will have scattered snow showers especially along the crest this morning and then we will begin to dry out this afternoon. Temps will stay cool today with highs in the 30′s on the mountains and 40′s at lake level. Overnight lows tonight into the 20′s
Local snow historian Mark McLaughlin has tallied up the snowpack numbers we had at the end of March. The 17.2 feet of snow on the ground on Donner Summit was the 5th largest snowpack on record since 1946. Interestingly the other four years were between 1952-1971 which was during the last cold PDO cycle. We are a few years into what looks like the next cold PDO cycle so we may have some more of these big snowpacks over the next 20 years.
Moist onshore flow will continue into the weekend but mainly expecting just some clouds or some light showers along the crest. We will see some sun as well and the temps will be in the 40′s on the mountains and 50′s at lake level through next Wed.
With a flat ridge in the Pacific next week several low pressures will spin up in the Northeast Pacific. This is going to bring an extended period period of stormy weather to the Pacific NW. For Northern CA we should stay fairly dry through the period with a chance of light rain/snow showers Monday, Wednesday, & Thursday.
Some of the storms will dig a trough down the coast far enough for a shot of colder air like next Thursday. Other than that we should have fairly average temperatures through the period. The storms into the Pacific NW will keep the ridge from building along the West coast and bringing any really warm air for now.
The Arctic Oscillation is going negative which would mean displaced cold South over the continent. But the NAO is not forecasted to go that negative and the PNA is not forecasted to go very positive. That could keep the pattern progressive with shots of cooler air for us in the long-range and no big extended warm-ups. It does appear that the accumulating snow could be pretty much done for us now which would be common coming off a La Nina season. Stay tuned…BA
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