Almost Chilly Weather Arrives for a Few Days, but a Gradual Change Follows in the PatternAugust 12th, 2013 at 1:36 pm by Don Paul under 4 Warn Weather
Following passage of a sharp cold front, temperatures will be running fairly well below average midweek. But by week’s end, readings will be moderating and may actually climb a tad above average this weekend.The exit of showers with that cold front will also usher in a lengthy dry period which should last into early next week.
The Pacific NW trough/western ridge/eastern trough will dominate again most of this week. However, the extended range ensemble means are showing good agreement in establish a nearly zonal flow a few days later. The amplitude of the trough-ridge-trough will flatten out so that the flow will almost be W to E at our latitude–in the mean. There will still be some ups and downs not currently discernible in models during this 16 day time span from short waves. However, while this isn’t a true pattern shift with the rebuilding of a ridge near us, it will bring us generally comfortably Mild rather than oppressively hot & humid conditions. And this evolution will take the autumn tang out of the air by the weekend and beyond.