Sunday, August 28, 2016

Crisp, Cool Morning

Great morning for walking along the Rillito, with very comfortable, cool temperatures. Not a cloud in sight above looking south from Kitt Peak. The series of T and Td below shows the rapid drop in dewpoints yesterday afternoon at Atmo - Td got as low as 32F - quite something for August. The Td series from TUS, second below, indicates that this is the greatest dry departure from average  Td since June began.

Plot of detected CGs above (from Atmo and Vaisala) is for 12-hour period ending at midnight last night, showing almost no thunderstorm activity west of the Continental Divide - again fairly remarkable for August.

The tropics remain active - outlook below from NHC is for the Atlantic - the two western disturbances may threaten US mainland during next couple of days. Meanwhile, Hurricane Lester continues westward out in the Pacific. 

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