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I came across an obituary for a distant cousin which mentions that he was a state climatologist who developed the "55/3 monsoon formula."

KANGIESER, Paul Carl, 1923 – 2003 Passed away September 15, 2003 after a long battle with cancer. Born in Topeka, lived in LA as a child. Served in the U.S. Army for four years in WWII. As state Climatologist of AZ he developed the 55/3 monsoon formula.

I searched Google and couldn't find any formulas related to monsoons known as the "55/3 formula", but I did find this news article:

In 2008, The National Weather Service in Phoenix decided to make a big change. For decades, the monsoon was said to have started after three consecutive days with a dew point of 55 degrees of higher.

What is the 55/3 monsoon formula?

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  • $\begingroup$ I have no familiarity with that, nor much focus on monsoon rainfall... but sounds like a reasonable rule of thumb out there... so that would make sense to be it, what you found. $\endgroup$ – JeopardyTempest Oct 26 '18 at 4:13
  • $\begingroup$ Couldn't find anything about a monsoon formula, but he did have some journal articles back in the day. $\endgroup$ – JeopardyTempest Oct 26 '18 at 4:20
  • $\begingroup$ Another ref on slide 22 in this powerpoint $\endgroup$ – mkennedy Oct 26 '18 at 23:01
  • $\begingroup$ Seems an answer to me @mkennedy, as it ties the formula into Kangieser, and gives more thorough explanation of what applies. Doesn't officially call it the 55/3 formula, but goes into enough detail. Not sure anyone is going to find better, and would be tough to find forecasters around from the era to help verify. $\endgroup$ – JeopardyTempest Oct 27 '18 at 6:02
  • $\begingroup$ @mkennedy, I agree that the reference on slide 22 seems to be the fullest explanation available. If you make that an answer I would accept it. $\endgroup$ – lizziv Nov 5 '18 at 23:10

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