The swamp cycle has reached its average annual
high-water mark.Over the past 20 years, the giant sheet of water that spreads across the swamp (which we call sheet flow because, well, it flows), tends to crest around late September.
Each year is different to be sure.
Some years rise higher (such as last year in the wake of Fay), others crest later (such as 1998’s early November arrival of a rain-heavy Mitch), other crest early but stay high all year (2005), others never quite materialize (2007), while some years save their fireworks, or in this case – water works – for last, tipping up into top
flood stage in October.
The early falls of 1995, 1999, and 2005 were especially memorable in that regard.
Late season cyclones (of September and October) were in play in each of those years.
Does that mean that this year’s storm-scarce tropics spells a gradual
decline to swamp stage from here on out?
As memorable as the big tropical “hits” can be,
The
“near misses” can be just as disruptive in the dry direction by “throwing a monkey wrench in the works” of the normal atmospheric stew that, this time of year, if left unfettered, can produce the “magnum opus” of our summer rain showers.
These are not your
“garden variety” isolated cumulonimbus showers of the early summer – the ones that crop up here and there and then dissipate just as quickly.
These are your regional-scale squall lines of convergent air masses that smash together mid peninsula, then stalk their way west on the wings of the prevailing easterlies, snuffing out blue sky and throwing down buckets of crackling rain on anything and everything in their broad path.
I charted 4 inches of rain at my house in Naples this weekend. Most of it fell in an hours time or two.
It was as big as a
“local grown” meteorological monster can get.
But their days are numbered:

It’s also the wet season’s
last hurrah.The peninsula’s rain machine of convectional and convergence storms shuts down in early October (a little later on the East Coast).
So even though I wouldn’t count October out just yet (tropical storm wise), nor preclude the chance of a soggy early winter from the El Nino, (not to mention it's raining outside my door as I type) --
The
fall equinox has arrived (September 22nd):
And along with it, the average high-water mark of the year.
It could be
downhill from here.