Persistant long wave trof over the Eastern Pacific to give long stretch of unsettled weather beginning Saturday through middle of next week
Thursday May 12, 2011
Posted at 11:28 am by Howard
This morning operational GFS was consistent with last nights run of both GFS 00z and ECMWF for another period of cold unsettled weather beginning Saturday into Wednesday of next week. The off shore negative height anomaly is being anchored by a persistent upper height anomaly north of the Hawaiian islands. At the same time there is possibly some feedback with the warm water pool north of the Hawaii islands as well. In fact, the area between the dateline and 150w is really warming up!
The longer range shows a zonal flow pattern with a pretty strong belt of westerlies across the pacific on the 18th. The upper ridge begins to amp again north of 150w, the end of the week….and so another period of cooler then normal wx is probably in the cards later.
Expect a few nice days here in Mammoth with highs in the 60s by Friday. Steepening laps rates will allow some thunder later Friday pm followed by an increase of wind Saturday and blustery and windy and cooler Sunday with snowfall in the high country. Highs will cool back into the lower 40s by Sunday and the return of 20s is expected Sunday night. Next week through mid week looks showery.
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