It’s becoming more clear that the sudden stratospheric warming event will force the jet stream pattern to bring a trough in the West and a slight trough in the East. This means that storms will track across the country and with cold air being forced south, the northern edge of the storms will have snow. The AO and NAO are going highly negative and the PNA is also going highly negative as well. The NAO will force cold air into the Northeast while the AO will force cold air into the Plains, Great Lakes and West. In addition, the La Nina continues to weaken and should be almost a neutral ENSO event by mid-March. All this will lead to a higher probability of snow from the West into the Northern Plains and Northeast late February into March. Along the I-80 corridor, there is a medium chance of snow during the time of year. We have about a 45-day period of late winter weather before the pattern goes to much warmer weather by April.
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