The parade of Pacific systems pushing east over the next 7-10 days with Southwest trough deepening to anomalous levels for May means big contrasts across the country, especially late week as heavy snow breaks out over the Rockies while the East is suddenly thrown into July!

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Check out the ECMWF 500mb height anomalies for early Saturday morning.

Check out the temp anomalies Sat PM West/Southwest vs Northeast.

Sun PM temps could see a push for 90 in New England while back in the Rockies, places could be struggling to reach 32!

Boston officially topped 70 degrees for the first time yesterday and could conceivably push 90 this weekend while it may be snowing across the Rockies.

GFS snow through the next 7 days

ECMWF more bullish, look at the Sierra…

The GFS ensemble 5-day mean 500mb height anomalies show the SW trough/NE ridge and that’s despite a positive up over Alaska. Blame or thank the deep trough over the SW for no trough digging into the East.

While the positive holds over the Northeast in the day 5-10 and even 10-15 (according to GFS ens), the Alaska positive slides east and weakening Southwest trough, we may begin to see the break down of the summer-like ridge over the Northeast and possibly the return of weak troughiness making a comeback towards day 10.

The GFS ensemble day 10-15 is hinting at this. Keep in mind that we could have a recurving typhoon in the West Pacific that bears watching.

See today’s video for the latest on the possible tropical system.

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