Little to report yesterday. Isolated Cbs here and there over southeast corner of Arizona, much as predicted by Atmo version of WRF model. Top photo shows moderate Cu over the Catalinas during the early afternoon yesterday (Monday Sep. 13th). Some ragged Cbs were visible to the east and southeast around 5 to 6 pm. Could not find any stations that reported rainfall (areal coverage over the Pima County ALERT network was again 0%). Douglas did report a thunderstorm but no precipitation.-----------------------------------------------
Middle image is this morning's Tucson sounding, indicating little CAPE (sounding is also 3 to 4 mm too wet wrt GPS precipitable water observations). The old boundary layer from yesterday has reached above 600 mb and it will be hot again. Winds below 500 mb continue light and variable - somewhat the story for much of the summer. Atmo WRF forecasts isolated Cbs over Cochise County again this afternoon and some stronger Cbs may build over higher mountains due to hotter, deeper boundary layer. But basically another hot and dry day.
Middle image is this morning's Tucson sounding, indicating little CAPE (sounding is also 3 to 4 mm too wet wrt GPS precipitable water observations). The old boundary layer from yesterday has reached above 600 mb and it will be hot again. Winds below 500 mb continue light and variable - somewhat the story for much of the summer. Atmo WRF forecasts isolated Cbs over Cochise County again this afternoon and some stronger Cbs may build over higher mountains due to hotter, deeper boundary layer. But basically another hot and dry day.
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Bottom image shows hurricanes Igor (Cat. 4) and Julia (Cat. 1) spinning out in the Atlantic, which is having a more active season than the Pacific, as was predicted. The NHC forecasts for these storms indicates recurvature well east of the Atlantic coast, so that folks on Bermuda should be keeping an eye on these two.
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