Tuesday, March 17, 2009

Warm front, cold front, cool trough

Good evening to all. Per the latest GFS models, an incoming warm front will be brushing us during the day tomorrow into early part of Thurs. So from what is shown it looks like the lowlands should remain dry for the most part, but could see some sprinkles, but the better chance of warm frontal drizzle looks to be along the coast and Cascades/Olympics. Temps may also be relatively mild as there will be light S-SWLY flow of 20kts or less at 850mb(see 850mb chart) with temps at 0c to maybe +1c while 925mb(see 925mb chart) temps look to be between +2 and +4c. So should see highs in the low to perhaps mid 50`s.

After our warm front brushes us by over next couple days, it appears a cold front will be swinging through here
around Sat morning, in which a cool/cold 500mb trough
will be over our region once again and proving a cool showery airmass. The EURO/Canadian model shows this trough for the weekend also. But timing is a little later and in showing trough for late weekend as oppsed to early weekend. Yet another cool trough might and or looks to swing through for early next work week. Unsettled weather marches onward.

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