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594. and 850mb temps that day was 25C. I believe that's the all time extreme record for over Atlanta at that level
I don't think I ever saw 600DAM+ around the U.S. It's not even 600 at the equator right now. Northern Africa is 597 right now.
Which goes with what I said.. Don't use the 500mbDAM as specific temps.. Use it to signify an air mass then look at other factors for surface temps. 594 is VERY Hot especially in June and even for the SouthEast
The higher the number, the thicker the atmosphere is with warmth which allows more heating at the surface.
A question about the 850 mb temps - it's been my understanding that it's the temp of the atmosphere at around 5000 feet. If so, how is it that Mt Mitchell at 6684 feet has reached a record high of 81 degrees, which would certainly be a good bit higher than the 25 C 850 temp you mentioned for our hottest day? Does having solid ground at the 850 mb altitude make for higher temps than in the clear air over someplace like Atlanta?
A question about the 850 mb temps - it's been my understanding that it's the temp of the atmosphere at around 5000 feet. If so, how is it that Mt Mitchell at 6684 feet has reached a record high of 81 degrees, which would certainly be a good bit higher than the 25 C 850 temp you mentioned for our hottest day? Does having solid ground at the 850 mb altitude make for higher temps than in the clear air over someplace like Atlanta?
Yes. Although minor, there is still ground heating. Similarly, the record at Mt Aigoual in France, bang at the 850 hPa level, is 85°F. I doubt southern France ever reached such high 850 mb temps.
A question about the 850 mb temps - it's been my understanding that it's the temp of the atmosphere at around 5000 feet. If so, how is it that Mt Mitchell at 6684 feet has reached a record high of 81 degrees, which would certainly be a good bit higher than the 25 C 850 temp you mentioned for our hottest day? Does having solid ground at the 850 mb altitude make for higher temps than in the clear air over someplace like Atlanta?
Good question. Yeah the heat from the mountain surface would definitely be different then air on its own and the max may have come at a different time from the balloon launch which is 8am & 8pm.
You sure it was 81° that day 6/29/12? 6684 feet = 2000 meters for my own reference.. Bit higher than the 850mb temps (4000-5500) which I would assume would of been cooler, not warmer. Think its an error? Link to history?
Good question. Yeah the heat from the mountain surface would definitely be different then air on its own and the max may have come at a different time from the balloon launch which is 8am & 8pm.
You sure it was 81° that day 6/29/12? 6684 feet = 2000 meters for my own reference.. Bit higher than the 850mb temps (4000-5500) which I would assume would of been cooler, not warmer. Think its an error? Link to history?
No, that's a record from way back - like 1980...lol. I was just pointing out that it can get quite a bit higher than 25 C at mountain locations which correspond to the 850 mb level.
So the 850 measurements are only taken at 8 am and 8 pm each day, and do not represent the actual max temp at that altitude, then?
No, that's a record from way back - like 1980...lol. I was just pointing out that it can get quite a bit higher than 25 C at mountain locations which correspond to the 850 mb level.
So the 850 measurements are only taken at 8 am and 8 pm each day, and do not represent the actual max temp at that altitude, then?
Oh phew.. I was going nuts trying to figure out why it would be such a big difference that day. LOL
Correct... They don't represent actual max temps but would be very close.. I came across situations here where it would be like +10C at like 3pm over Long Island but the 8pm OBS was +9.1C or whatever.
While the 850mb level doesn't fluctuate like the surface, right, we don't have exact max or mins from there..
Here's a good site to find the history of the upper air data. They even have pwat values too. I'll post in the How to get data thread soon. Gotta run now though.
12pm. 80s in NJ and NYC, 60s in Connecticut and Long Island. What happened to the 70s? lol
Absolutely amazing gradient once again. Even with the core of the heat directly to the south over Georgia and the Carolinas (as opposed to over Texas and Oklahoma where it seems to be most of the time) New England still manages highs in the 50s and low 60s right before the summer solstice!
At 6pm, New Haven CT is 64F and overcast, Providence RI is 58F and cloudy, New York City is 68F and overcast, Philadelphia is 88F with a heat index of 99F, Williamsburg VA is 89F with a heat index of 99F, and Norfolk VA is 97F with a heat index of 113F!
and a flash flood warming for a good chunk of the metro area and westward
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. I believe that's the all time extreme record for over Atlanta at that level
I'd be in hog heaven if I was in Chicago right now, with all that rain and t-storms.
