Posted by: senorwx | August 20, 2011

Le Déluge

It was like Mother Nature opened her bathtub drain right over San Pancho in the wee small hours of Friday the 19th of August. More than four inches of rain fell in that single storm. To be exact: 4.07 inches.

It started about 1:45 a.m. and lasted till 5, with a half hour break at 3:15. That’s 4.07 inches in three hours. More than an inch of rain (on the ground, in the pool, in some rooms, on the street) every one of those hours in San Francisco, Nayarit, Mexico.

For the record, Puerto Vallarta recorded less than three inches of rain on the 19th.

What’s even more remarkable about this storm in San Pancho is that the rain came down at a rate of more than 10 inches/hour at several points between 4 and 4:30 a.m.! A quick check indicates that’s the highest rainfall rate at the San Pancho Weather Station in five years of record keeping. The rate peaked at 10.87 in/hr at 4:20.

Rainfall Rate in San Francsico, Nayarit August 19, 2011

Wind speeds averaged one to six mph during the storm, with gusts up to 22 mph during that 4 a.m. downpour. Several folks also report the accompanying thunder during this event is the loudest, biggest, noisiest they’ve ever heard. We don’t have a device mounted on the Weather Station to record the intensity of the thunder. But every dog in town was dug in for the night.

Does this portend another record rainfall this year in San Pancho? Unlikely, but you never know. For the record, as of August 19, total rain is 8.28 inches compared to 13.24 inches last year. As for the annual rainfall totals, we are still about 20 inches shy of our record-breaking 2010 rains!

And we still have our bridge. That’s a good sign.

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