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July Heat Wave Obs/Discussion


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It's just frustrating. Today is a perfect example of why there is no accurate climate record for the 3rd largest city in this country.

It's even worse in the winter on a good radiational cooling night with deep snow cover. Temp readings are way different in the city compared to the suburbs and beyond.

Today and yesterday make this the first time we've gone back to back with 100+ since the drought summer of 2005.

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Yeah if Chicago's official obs site was actually in the ****ing city then Chicago would have actually ****ing hit ****ing 100°F (Lakefront hit 100°F too). But no, it has to be in the ****ing middle of ****ing nowhere. ****ing stupid.

LOL, it was 1 degree difference...and it's better in the winter since you don't have to deal with as much UHI keeping low temps artificially warm.

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LOL, it was 1 degree difference...and it's better in the winter since you don't have to deal with as much UHI keeping low temps artificially warm.

This doesn't change the fact that the climate record FOR THE CITY is not represented at O'Hare. Granted, a comprehensive record for the whole of Chicago is not truly possible, but if you have a spectrum and are looking for the most representative value overall, you don't pick from one extreme end. If O'Hare, Midway, and Northerly Island comprise the spectrum, then O'Hare and the Lakefront represent the opposite ends of the spectrum, with Midway the logical middle ground.

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This doesn't change the fact that the climate record FOR THE CITY is not represented at O'Hare. Granted, a comprehensive record for the whole of Chicago is not truly possible, but if you have a spectrum and are looking for the most representative value overall, you don't pick from one extreme end. If O'Hare, Midway, and Northerly Island comprise the spectrum, then O'Hare and the Lakefront represent the opposite ends of the spectrum, with Midway the logical middle ground.

Yeah, I mean I guess I understand the frustration with changing sites for the city and not having a good continuous record....here in Denver, the airport moved a lot further away from the city in 1995, and now it's way less representative of the actual city than it used to be.

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I didn't say that. I meant, make a site like MDW, in the city limits, the official reporting station.

Stupidest thing ever. With a city the size of Chicago and with microclimates caused by the urban heat island, the lake etc etc isn't it a bit unreasonable to have one site represent the city? Especially if it is on the furthest NW fringe...

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Anyhow, looking back at records for both major Chicago airports, looks like this heatwave will end up more impressive than 2005 and 1999 for duration (though it didn't peak as high, unless something weird happens tomorrow), not as impressive as 1995 overall (similar duration but not as hot).

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CLE hit 94 today. Luckily dew points mixed down into theupper 60s to near 70 across much of northeastern Ohio this afternoon, which kept heat indices in the upper 90s to just above 100 in some cases, which was enough for CLE to issue the first heat advisory of the year for greater CLE (I believe we had none last year or the year before).

Tomorrow will be the hottest day in the Cleveland area since 1995, when CLE topped out at 99 I believe. CLE has not gone above 95 since then.

Unfortunetly, the higher (75+) dew points are clearly moving east, and I do not believe we will see dews mix down to or even near 70 tomorrow afternoon. The NAM shows very high Theta-e air in place tomorrow afternoon, which supports this idea:

post-525-0-97945100-1311216441.png

post-525-0-05688000-1311216469.png

I’m a little rusty on skew-t’s, among other things, but assuming I did this right the 0z NAM is showing the potential to mix down 22-23 degree 850MB temps, which yields 98-99 degree surface temps.

post-525-0-53655000-1311216634.jpg

Right now it doesn’t appear there will be any convective debris to deal with, so northern Ohio should see sunshine much of the day.

post-525-0-20677100-1311216568.gif

A cold front will approach Lake Erie by 0z, but will be nearly stalled and the airmass will be strongly capped given the very high heights and mid level temps, with the strongest upper level flow generally north of the front, so northern Ohio should see nearly unabated mostly sunny skies during peak heating tomorrow.

With that said, believe the very warm 850mb temps will mix down well, yielding temps from 95 to locally over 100 for much of northern Ohio,which will threaten some record highs.

My forecast highs for tomorrow/records

CLE: 98/97

CAK: 96/100

MFD: 98/105

TOL: 100/99

YNG: 98/99

ERI: 95/93

FDY: 100 (not sure on the record).

Burke Lakefront Airport in downtown Cleveland may also hit 100 or 101 tomorrow afternoon. I do not believe records are tracked at Burke. The combination of a down sloping southwesterly flow towards the lakeshore (no lakebreeze tomorrow) and UHI may be enough to propel Burke to over 100 degrees.

We’ll see how this works out.

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Yeah if Chicago's official obs site was actually in the ****ing city then Chicago would have actually ****ing hit ****ing 100°F (Lakefront hit 100°F too). But no, it has to be in the ****ing middle of ****ing nowhere. ****ing stupid.

Powerball, is that you? :P

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What the hell, lets go for it...

ORD

Sun: 93/95

Mon: 90/92

Tue: 93/93

Wed: 96/99

Thur: 98

Fri: 98

Sat: 92

3F too cool today.

Tomorrow will depend on frontal timing, a possible lake breeze, and any potential convective debris. 98 still looks possible, but a degree or so lower looks much more likely.

Friday will depend on Thur night/Fri morning MCS potential. If it stays away mid 90's look likely...If not we might be stuck in the 80's.

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This pig ridge is Texas's dirty little secret. It started there, it was nurtured there and it has expanded its empire into Oklahoma and Kansas. Invaded the borders of the Great Lakes area and acted completely crass along the way. What a disgusting thing it is. Go home, go away. You don't belong here. Go back to where you came from.

Ever since Texas Gov. Rick Perry called for 3 days of prayers to end the drought on April 21 things have not gone well, drought wise.

Speaking of which, the new Drought Monitor should feature some healthy eastward and northward expansion of the drought intensity.

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Hmmm, so whining about Chicago's official observation site is ok (despite the fact that the same outcome was met either way, that is it was hot and they hit 100*F), but any other "whining" is "annoying".

lol.

Anyways, looking forward to our first official 80*F low tonight. 75*F dewpoint right now.

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