Saturday, August 18, 2018

August 17th - Another Down Day

Little beside cirrus in sky this morning, but there was a large bobcat crossing the wash as I walked westward along the Rillito.

Yesterday was very suppressed over the lower elevations of all of southwest Arizona, with thunderstorms over mountains mostly east of Tucson (CG flashes above for 24-hours through 11:00 pm MST night - from Atmo and Vaisala).

Morning TWC sounding below (from SPC) continues moist with potential CAPE, but the weak wind profile is westerly, as the anticyclone aloft has shifted toward the northern GoC. There will likely be some drier air sneaking in above 700 mb during the day today. Storms in southeastern Arizona will again be confined to high elevations.

At bottom, IR image shows Category 4 Hurricane Lane heading westward toward central Pacific. There was also some dissipating convection over the central GoC.

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