Thursday, September 18, 2014

Odile Rains Stay South Of Metro


Not much to say except that Odile remnants stayed south, tracking eastward fairly near the international border. Media hype on the 6 pm news last evening was awful for the metro area, which had only light rains off and on for past 60-hours. Art Douglas (who measured over 4 inches of rain at his Ash Canyon location) sent along the radar-rainfall estimate above, which shows that heaviest rains moved eastward across northern Mexico. Rain estimates terribly chopped up by ground clutter blocking out much of the low-level, tropical echo cores.

Below are two sectors from the ALERT network - rain amounts are for the 60-hours ending at 6 am this morning - Tucson metro averaged around 1/4 of an inch (0.32" here at the house). The bottom shows the south sector of the ALERT network where the rain amount gradient is very sharp from Green Valley south toward Nogales. (Note that when the radar was sited, the sector that covers Nogales area was sacrificed so that Kitt Peak could be blocked by Mt. Fagan,)

The model forecasts were close, but some stayed locked in forecasting heavy rains over Tucson even at the very short-term. The NHC forecasts were erratic and not terribly accurate for much of Odile's life, and the final forecasts from NHC continued to forecast a depression crossing northeastward through central Pima County.




Jack Diebolt sent the radar cross-section above - from Patagonia east to Ft. Huachuca at mid-afternoon. Note the very tropical, warm cloud structure of the echoes, explaining why the radar-rainfall maps were so very ugly. The plot below shows that there were almost no lightning CG flashes during the very heavy rains across the Borderlands.

Wonder what will happen to all the sandbags people were frantically filling all day yesterday?


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