Posted by: senorwx | October 25, 2015

Patricia Passes on San Pancho

Patricia, the most powerful hurricane on record in the Western Hemisphere, gave San Pancho a pass this week. If you overlook all of the hurricane preparations by the residents, the storm was truly a non-event. Thank goodness, he hastened to add.

Patricia brought a very ordinary rainstorm to town.

Patricia brought an ordinary rainstorm to town.

Nothing remarkable took place, but because of many inquiries directed to the Weather Station, your humble servant feels the need to write that nothing happened. This is particularly easy for me to report as I am still in the Northeast writing this blog. But from all reports from friends on the ground in San Pancho and Puerto Vallarta, the storm was a bust.

There is one thing to keep in mind. As the storm made landfall some thirty miles south of PV, there are some people suffering right now that we simply don’t have information on. While sparsely populated, that doesn’t mean no population. It means we should keep those folks in our thoughts and prayers. We will learn more in the days ahead, but I’m including links to current Time magazine articles below that put the storm in perspective.

What did happen as Patricia passed south of San Pancho is worth noting. The barometric pressure dropped to 29.53 inHg at 7:21 pm, the time of landfall and again at 9:21 as the storm headed east. That’s the lowest pressure on record, but it is matched by the same reading four times in the past eight years. While our barometric pressure on the coast varies very little from day to day, year to year, the average low is 29.89 inHg. To better understand this, check out Wikipedia for “barometric pressure”.

Patricia spared the beach at San Pancho

Patricia spared the beach at San Pancho

Patricia also brought us a decent rainstorm of about two inches, pushing our annual total of precipitation toward normal levels for the year. Wind gusts were unremarkable considering the strength of the storm, ranging from 10 to 18 mph as the storm passed. By comparison, the highest gust for the year was 32 mph on July 31. The average maximum wind speed in San Francisco, Nayarit is 18 mph.

Patricia was certainly an event for all those who went through the preparations for the storm and we’ll remember it as the storm that didn’t happen. As a weather event however, she turned out to be a non-starter. And for that we can all be grateful.

Why Hurricane Patricia Didn’t Cause Epic Damage | TIME

This Is How Patricia Became The Strongest Hurricane | TIME

September 2015 set the high temperature for any September on record in San Pancho: 95 F on the 7th at 4:41 p.m. But wait, there’s more.

The record September high reading of 95 F is also the All-Time-High Temperature on record at the San Pancho Weather Station since it went online in 2008! The previous high was 94.2 F in June 2014. But wait, there’s more.

The average high temperature for the year 2015 is already at 90.55 F. A degree higher than any previous year. A full degree higher than last year. Global warming? Too soon to tell. We’ll need the October through December high temps to determine the actual average high for the year. But wait, there’s more.

The high Heat Index reading set a record for any September at 118.8 F. That’s second only to the all time high heat index of 119.6 F in July 2014.

In the rain department, our annual precipitation is now at 36.33 inches, a bit below annual average of 42 inches per season since 2008. There were 17 days in the month with measurable rainfall (>.04 inches). Total rainfall for the month was 7.46, below the average of 12 inches for the month since 2008. The least rain in any September since 2008? It was 2.81 inches in 2011. The most rain in September: 28.24 inches in 2010.

On the evening of September 25 a cold front moved through San Pancho between 8:10 and 8:15 causing a double digit temperature drop from 87.49 F down to 77 F In just five minutes! High winds and some rain followed, bringing some welcomed relief to San Pancho residents. Hopefully a precursor of cooler days ahead as we celebrate San Pancho Days!

Posted by: senorwx | September 1, 2015

Was August really that hot and humid?

Yes. It was hot, humid, rainy. Big time. Muggy. Oppressive. Pick your favorite word.

August 2015 goes down in the record books!

Highest temperature ever recorded at the San Pancho Weather Station: 94.8 F.

All time highest average Heat Index for any month on record: 94.1 F. (Last July’s average, the previous high average, was only 92.9 F.)

Second highest Heat Index reading on record: 117.1 F. (Previous high was July last year at 119.6 F.)

The Malecon at San Pancho,Nayarit,Mexico

The Malecon at San Pancho,Nayarit,Mexico

A handful of rain events netted nearly 12 inches of rain for the month, an average amount. That doesn’t equal the 14 inches in August of 2010, which was followed by the 28 inches of rain in September 2010, the all-time rainfall record. As in our San Pancho bridge washing away.

The heavy August rain storms finally caused the river to break through to the Pacific. What to expect for September? There will be significant rain as the annual rainfall for this year stands at 30 inches. The average yearly amount is about 40 inches, possibly more.

Relief in sight? Sure, as average high temperatures for September and October moderate to the low 80’s, it will cause  flocks of snowbirds to return to our sunny spot on the Riviera Nayarit. Look ahead. Our fabulous weather and gorgeous days are just a few weeks around the corner.

Easy for me to say.


The south beach at San Pancho where the rio meets the Pacific.

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