Heads up to everyone in Arizona and Southern California for a potentially significant increase in thunderstorm activity for this weekend. Tropical Storm Norbert is migrating northwestwards off of the Cape Region of the Baja Peninsula and may send a slug of moisture and unstable air north into the deserts and possibly even all the way to the coast of SoCal. AZ and CA are two states not normally thought of to be affected by hurricanes, and indeed direct hits by cyclonic systems on either state are extremely rare, but the decaying remnants of such vortexes sending large amounts of tropical moisture northwards are responsible for many 24-hour rainfall records set in most of the western US. The record for my state is 12.01 inches of rainfall (305.1 mm) received at the summit of Harquahala Peak in La Paz County, about 100 miles south of me in a normally arid region of southwestern Arizonas Sonoran Desert. This was courtesy of Hurricane Nora on September 25, 1997. A very close second is 12.00 inches (304.8 mm) received at Mount Graham in southeastern Arizona, the result of Hurricane Octave on Sept 28, 1983. September and October are the two months most likely to be affected by excessive rainfall totals in this region. Hurricanes: They arent just for Florida anymore!
Posted on: Wed, 03 Sep 2014 09:18:53 +0000
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