Tuesday, June 23, 2009

Hot and Humid day on tap....

Forecast problems...Temps,dewpoint temps..Showers and thunderstorms this evening into the over night hrs....So get ready for one hot humid day...

CURRENT CONDITIONS...

Temps at this 7:30 AM hr are in the upper 60s to lower 70s..Dewpoints are right around the air temps some areas of fog still showing up in the SFC OBS..So a warm humid morning to greet everyone...

SFC ANALYSIS...

Shortwave this morning over SD down into Central NE has kicked off an areas of showers and thunderstorms this morning...A CLDFNT sitting over far NW MN down through the Dakotas...Meanwhile a 1013 High pressure is centered over far Northern MI..

TODAY THROUGH TONIGHT....

Main concern for day will be the very hot and humid conditions...So lets tackle this first...After areas of fog burn off this morning,which is doing rather fast...We get our self's setup under MSTLY sunny skies...Winds are going to remain rather light through out the day...Highs today should range from 90 to 95 degrees today..Dewpoints climb to upper 60s to lower 70s once again...Dewpoint temps and air temps combined should set the stage for heat indexes ranging from 95 to 102 or so this afternoon..One should drink plenty or liquids today.Try to stay out of the sun as much as possible this afternoon...Check on older people and keep an eye on your kids,family,and neighbors...For those that don't have AC try to get to a place that does...Shopping in a local mall might be a good idea...Folks this heat blast is nothing to joke around with,heat can kill..Also make sure livestock have plenty of water to drink..Best thing to do on days like today is slow down ...Ok now on to problem number two...Thunderstorms /severe thunderstorms....Later this afternoon the CDL FNT out west will push towards the area..Problems is we will have a rather healthy CAP ahead of the FNTL BNDRY...If CAP can be broken we could be dealing with more widespread severe weather event,Model suggests this will not be the case,though...NAM and GFS both agree on MCS forming tonight...GFS is a little more North than NAM...GFS shows the thunderstorm complex forming in South Central MN and moving into the FA...Meantime NAM has the thunderstorm complex forming over SW MN then swings it SE into IA..So will blend them and run with showers and thunderstorms after dark,unless the CAP breaks in the early evening hrs,then we may see a line of storms move into the are before that..As far as severe thunderstorms go..My thinking is Western MN into IA will be the best target area...Still many things can go wrong as a rule with heat ridges...However if and when thunderstorms take off and if they can reach the severe weather thresholds..Main threat would be large hail,damaging winds,and heavy rain...Thinking is the tornado threat will remain over in MN...Still AM not to thrilled about the chances of severe thunderstorms ATTM...Will be watching this as the day unfolds...

WEDNESDAY THROUGH FRIDAY...

Temps still running in the middle to upper 80s through this period..Dewpoints will drop some on Wed but will be short lived as we get back into a return flow of muggy air once again Friday...Wed will keep a chance of showers and thunderstorms going through about noon...Once again this will depend on what transpires tonight...Will run with highs in the middle 80s for now,might have to revisit at this later today....Will keep 80s going through Fri...Lows middle 60s seem to be the way to run.....

FRIDAY NIGHT THROUGH MONDAY....

Next FNTL BNDRY pushes into the FA Friday night..Another round of showers and thunderstorms sitting on the bar for us...Lows Fri night middle 60s is as low as we can drop them to..Sat....Temps still hold close to the middle 80s with showers and thunderstorms dotting the FA...Some of the models are hinting at some of these storms could become severe...
Sat night will end showers and thunderstorms before midnight....Lows fall below 60 for a chance..Sunday is shaping up to be a nice day under PTLY CLDY skies highs in the lower 80s....Lows in the lower 60s.....Monday temps soar back into the middle 80s once again..Tuesday we may hit the upper 80s to lower 90s once again,also appears more showers and thunderstorms moving into the area later in the day...