Tuesday, May 05, 2015

Late Severe Storm Reports - Phoenix Area

Jack Henz sent the following information this morning re severe storms on Sunday and Monday up toward Phoenix. The video is very interesting and appears to show the surface circulation to be connected to a funnel cloud below cloud base. That makes this a small tornado of the type that occur frequently near Denver.
While I was reviewing the FCDMC observations form yesterday I noted the following wind observations form the South Mountain fan weather station:

FCDMC ALERT System Data Display 

6554 South Mountain Fan
Peak Wind
Date       Time     miles per hour
05/04/2015 20:00:00           38.3
05/04/2015 19:45:00           37.4
05/04/2015 19:30:00           50.0
05/04/2015 19:15:00           52.9
05/04/2015 19:00:00           60.3
05/04/2015 18:45:00           52.7
05/04/2015 18:30:00           41.2
05/04/2015 18:15:00           35.4
05/04/2015 18:00:00           12.8
My son, Dan Henz, who is a meteorologist with the FCDMC lives in Ahwatukee, also noted that his trees were bending over in half. Looks like strong outflow from the Florence storm complex may have been the cause. The 60 mph is in the severe category. I didn't see any other reports in our metro area this high. Also on Twitter I saw the You Tube from Avondale on Sunday evening of the landspout on Twitter shared by Mike Oblinski. From my days in Denver dealing with landspouts this "dustspout" appeared to have a visible, but small, funnel connection in the movie and looked like a solid F0 that hit nothing fortunately. Here's the link: https://www.youtube.com/watch?t=15&v=HZHRGMWkwOE
Hope these observations will be entered into the severe weather data base.
All the best,

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