September 29, 2015
close to an exact match
Here is a quick side by side comparison of weekly SST anomalies in the El Niño 3.4 region
for the last three months. This year 2015 to the left, 1997 to the right.
01JUL2015 28.9 1.4 02JUL1997 29.0 1.5
08JUL2015 28.8 1.5 09JUL1997 28.9 1.6
15JUL2015 28.9 1.7 16JUL1997 29.0 1.8
22JUL2015 28.8 1.6 23JUL1997 28.8 1.7
29JUL2015 28.8 1.7 30JUL1997 28.9 1.9
05AUG2015 28.9 1.9 06AUG1997 28.8 1.8
12AUG2015 28.9 2.0 13AUG1997 28.9 2.0
19AUG2015 28.9 2.1 20AUG1997 28.9 2.1
26AUG2015 29.0 2.2 27AUG1997 28.8 2.0
02SEP2015 28.9 2.1 03SEP1997 28.9 2.1
09SEP2015 29.0 2.3 10SEP1997 28.9 2.2
16SEP2015 29.0 2.3 17SEP1997 28.9 2.2
23SEP2015 29.0 2.3 24SEP1997 28.9 2.2
There is no more than 2 tenths of a degree difference in any week over the last 13 weeks.
When it comes to scientific comparison this may be as close to an exact match as you will ever see.
As we discussed in El Niño, The Wild side of the Weather Cycle, an experience similar to 1997, is going to have its disadvantages. The 1997-98 El Niño was the strongest and had impacts around the world.
Active weather continues in late September with flooding rains in Southern Alabama and the Florida Panhandle. Heavy rain becomes a threat for the East coast, and especially the Northeast as a series of events including a tropical storm line up to bother The East in the final days of September.
The need to stay alert and understand the threats for active weather is already increasing due to the prominence of the current El Niño.
As I continue to ponder the fate of the 7 Utah hikers in Zion National Park, the apparent source of the moisture is an interesting subject. Enhanced tropical moisture drifted into the Southwest U.S. from a remnant tropical system, former Hurricane Linda, on Monday September 14th. Record September rains occurred in California and flash floods caused fatalities in Arizona and Utah.
Interesting calendar day to be reflecting on tropical moisture and the Desert Southwest. Reviewing the San Diego NWS homepage today, September 26th, I found past weather telling a similar story, life threating flash floods because of tropical rains.
September 26, 1997: Heavy rain and thunderstorms developed on Sept. 24 and ended on this day. That moisture came from the remnants of Hurricane Nora.
September 26, 1982: The remnants of Hurricane Olivia re-curved northeastward across Southern California.
So the remnants of Hurricane Nora in 1997, and the remnants of Hurricane Olivia in 1982, both from infamous years from my new e-book.
And now we have the remnants of Hurricane Linda in 2015.
The book is written, but the journey is just beginning, …
Welcome to El Niño.
Learn more in my latest e-book El Niño: The WILD side of the weather cycle…
What we know, What we don’t, and Why you should care!
Available at Amazon
I am troubled by a recent occurrence. Two of my favorite things, eventful weather and National Parks, have managed to intertwine in a bizarre, unsettling and tragic way. My experiences pull me in opposite directions. On a tightly scheduled vacation with friends or family, I can safely say, a 40 percent chance of showers would probably not prompt changes to the daily plan. On the other hand, one brief exposure to the slot canyons of Zion Canyon, even on a dry, safe summer day had me thinking, “this is one scary place!”. The primary canyon of the Park is narrow enough. But deeper in, sheer walls that tower 2000 feet high narrow to just a few feet wide. These are Slot canyons, like a coin slot, very, very thin. You would not want to be at the bottom of this narrow, water scoured channel if there were any runoff at all. Oh no, is that a dark cloud? At the bottom of those canyons very little sky is visible. Much greater minds than mine have wrestled with National Park policy. The delicate balance between public safety and unrestricted access to our nations wildest lands is always a challenge. I am not sure anything should change. But after 25 years of jumping for every Flash Flood Warning in a client’s listening area, 7 fatalities at such a place of awe and adventure, seems an awfully high price to pay for a day in the wild. How did all the safety measures fail in this particular situation?
More thoughts next time
17SEP1997 28.9C 2.2C
16SEP2015 29.0C 2.3C
For a brief moment in mid-September 2015 the weekly SST anomalies in the 3.4 region actually exceeded the value of the record 1997 season. 1997 had a slight lead most weeks of late August and early September, so 2015 currently lags behind 1997 in the 3 month averages and the ONI. The next several weeks will be quite interesting to see if this year can continue to warm at the 1997 rate.
Watch for more unusual weather events as the anomalies warm.