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malaise

(268,968 posts)
Mon Sep 21, 2015, 05:35 AM Sep 2015

TD16E will bring flash floods to Southern California and Arizona

says Masters.
http://www.wunderground.com/blog/JeffMasters/comment.html?entrynum=3119
<snip>
An area of disturbed weather off the coast of Mexico's Baja Peninsula (Invest 91E) is headed north at 15 mph, and will likely make landfall on the central Baja coast on Monday morning. Satellite images of 91E on Sunday morning showed plenty of moisture and heavy thunderstorms were associated with 91E, though this activity was not well-organized enough to be declared a tropical depression. In their 8 am EDT Sunday Tropical Weather Outlook, NHC gave the disturbance 2-day and 5-day odds of development of 70%. Moisture from this system will produce heavy rains across portions of the Baja California Peninsula and northwestern mainland Mexico through Tuesday, potentially causing dangerous flash flooding and mudslides. An impressive surge of moisture 91E will bring some of the highest levels of water vapor ever recorded in September to Southern California and Arizona beginning on Monday and extending into Tuesday. This rich tropical moisture will very likely cause dangerous flash flooding; the NWS is predicting that up to four inches of rain could fall in portions of Arizona, which is a very extreme amount of rain for this desert region. Daniel Swain's excellent California Weather Blog noted on Saturday evening that this week's rains from 91E could cause September 2015 to set some all-time monthly precipitation records in Southern California, thanks to rains last week from the remnants of Hurricane Linda. Those rains led to flash flooding that killed 19 people in the Utah/Arizona border region.



Stay safe folks!!

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