Monday, January 31, 2011

Cold mornings coming!

Some chilly nights in store for the next few….mornings. High pressure is building to our north that will bring east winds across the area later today, pulling in some cold air using the 50-60 mph winds blowing through the Gorge area by later tomorrow. This cold air will pile up in the valley and spill into the coastal areas lowering nighttime temperatures, along with the clear skies, into the upper 20s and low 30s thru Thursday morning. With east winds in the Coast Range and along the coast of 15-20 occasionally gusting to near 25, it will feel like the teens in the early morning hours, especially Wednesday around daybreak. As a side note, with the dew point in the 20s the air will be very dry during the day when the temperatures are up near 50, that puts the relative humidity down around 30%. This scenario could also cause a problem over in the valley, similar to last week, where the NWS issued an Air Stagnation Advisory as the air is trapped under an inversion.

Thursday the high pressure appears to push off to the east allowing an onshore flow to return as a weaker upper level disturbance moves across giving us a slight chance of rain through the weekend. Temperatures would also return to a more seasonable level, with highs in the mid 50s and lows around 40.

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