Saturday, October 20, 2012



Jim Means reports that: "The surface low pressure associated with the remains of Paul passed close enough to San Diego to generate strong southerly winds (especially along the coast) and end a heat wave on late Wednesday night/early Thursday. For example, at the North Island Naval Air Station in Coronado, the 11:52PM ob had temperature/dewpoint of 81/44, with east winds at 7; the 12:17AM ob had 72/63, with a south wind at 18 gusting to 30."
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The 15 UTC water vapor image above shows that the upper-tropospheric low west of Baja is still holding out there. Forecasts indicate that it will open into the westerlies, weaken, and be kicked out this weekend. Note the big area of dry air ahead of. Will likely bring some clouds and perhaps light mountain showers as it crosses southern Arizona.

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