Double Barrel Highs This Week

This upcoming week will once again feature spectacular late summer wx with a very brief surge of heat and humidity mid-week...let me quickly explain whilst I listen to my new and improved PSU Nittany Lions....do you hear it?  Do you hear it?  The infamous roar!

2 sprawling high pressure systems will move SE from central O Canada and keep most of the heat and humidity off to our south and west. There will be a brief surge Wed after high pressure system number one settles in for the Monday-Tuesday time frame...here are the forecast clear sky morning lows for Monday...temps will be a few degrees cooler since this is for 2 am and the is a few more hours of radiational cooling until the sun rises ~7:30 am...

It should be cooler than this am when I broke out my chamois shirt to help alleviate the chill.  This map shows the surface pressures and the humidity, or in this case, the lack thereof, at the same time Mon am...PWATS are known in the biz as "Precipitable Water".  The larger the number, the more humid the air mass...

This 1023 mb will exit stage right and allow for the heat and humidity over the lower Miss Valley to advect NE towards PA.  By Wed pm, temps will surge to near 90F and the absolute humidity will easily double making Wednesday possibly the last truly hot day of 2013!

Note the surge of the "green" or higher PWAT air moving towards PA!  From an even purer scientific point of view, look at how the center of lower pressure literally is pulling this less dense air towards its center located in Quebec, north of my favorite eastern state, MAINE!

However, lurking off to the NW is yet another surge of cool, dry O Canadian air being ushered in by high pressure so by Saturday am...here are the forecast low temps...note how the lakes are much warmer than the surrounding land adjacent to it.  Makes for good grape growing and wine making on the SE shores of Erie and Ontario...or so I am told!

Accompanying that air mass is the much drier air as we see in this model of both PWATs and surface pressures...a nice "banana" high that in the winter would love to be attacked from the SW and lead to a nice overrunning event of snow and ice...not too long for the fun and games to start!

By the way, with this absolutely perfecto wx, all of nature's creatures are taking advantage.  Look at what Kay spotted outside our humble abode...simply awe inspiring and impressive!

And a wider view to note the engineering intricacies of his (or her) web; not sure of the structural importance of the "zig-zag" pattern above and below his (or her) body?  But it is pretty wild!

Ok...with all of that said, enjoy the remainder of the weekend...and enjoy Boris!

Keeping an eye on the tropics....

Smitty

AA:  Nice weather continues next week but with a brief surge of heat and humidity for Wednesday.