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View Poll Results: If the temperature outside is over 80°F/27°C, what dew point range do you prefer?
0-20°F 38 11.21%
20-30°F 25 7.37%
30-40°F 44 12.98%
40-50°F 87 25.66%
50-60°F 65 19.17%
60°F-70°F 45 13.27%
70°F+ 35 10.32%
Voters: 339. You may not vote on this poll

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Old 01-17-2017, 06:03 AM
 
Location: Bologna, Italy
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-6c dp in 5c temp.

This long stretch of dry cold is rejunevating !
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Old 01-17-2017, 07:36 AM
 
Location: Sydney
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Pretty wild dew points in Renmark, in the Eastern part of SA.

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Old 01-17-2017, 12:23 PM
 
Location: Paris
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Quote:
Originally Posted by nei View Post
what was the water temperature?!
Apparently 57°F. It might be colder right on the coast due to upwelling with this constant N wind.



Quote:
I assume the low dewpoints were a fohm effect?
Yup, were and still are.



Quote:
I assume not dropping to the dewpoint? Wind preventing further overnight cooling?
Hell no! If the thermometer ever drops to -15°C in Nice I'll eat my hat. The lows were 29°F in Nice and 24°F in Cannes. Still quite cold for the region. In fact it was the coldest night since 2005 in the former and since 1986 in the latter. Jeez I didn't realize that.
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Old 01-17-2017, 12:35 PM
 
Location: Near the Coast SWCT
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Quote:
Originally Posted by Rozenn View Post
The dew point hovered between -13°C and -19°C (single digits °F) today in Nice. I took a dip in the sea and upon getting out of the water, the dry air felt downright freezing.
Nice! in Nice! Wow at the dip even with water temps in 50s. Not sure I would even try that. lol


My lowest dew so far was negative 20s Celsius. Arctic bone dry. Mid December.




Here's a graph for Nice last 3 days.









Quote:
Originally Posted by nei View Post
I assume not dropping to the dewpoint? Wind preventing further overnight cooling?
Not everyone gets that to happen. I learned that term from you, never heard of it. Made no sense because so many areas (maybe most?) doesn't relate to. Thought it was always a separate weather indicator. So it sounded strange until I started watching your area. Weird how you touch more often than other areas around. Made no sense. I always knew you can get "an idea" for a low but not actually need to touch.


Chicopee, MA couple degrees off but looks weird always dropping to it. lol









Looky but no touchy in Bridgeport, CT. Ok, maybe touchy sometimes. lol





I know coast vs interior differences but check out Grand Forks, ND. No touchy there. OR Birmingham, Mississippi. There are inland areas that don't necessarily touch all the time
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Old 01-17-2017, 12:54 PM
 
Location: Near the Coast SWCT
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Current Dews. Afternoon time Eastern U.S


Drier in southern France than northern Vermont. No idea why compare or if interesting. lol







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Old 01-18-2017, 10:48 AM
 
Location: Paris
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Temp dropping down to dew point would be a common pattern for inland places when it is still. Not really the case lately in Paris with the wind. If it stops, the temp is likely to drop to the dp.





Current European map. Quite low dews in Spain. Large diff between Seville and Gibraltar:


Cartes des stations météo en temps réel en France, en Europe et dans le Monde — archives depuis 1880 - Infoclimat


Now I'm getting parched hands. Time to get the dandy cream out.
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Old 01-18-2017, 03:46 PM
 
Location: Bologna, Italy
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Still enjoying the dry weather here

A nice change from the usual January shivering dampness
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Old 01-19-2017, 01:57 PM
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Location: Western Massachusetts
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Quote:
Originally Posted by Rozenn View Post
Temp dropping down to dew point would be a common pattern for inland places when it is still. Not really the case lately in Paris with the wind. If it stops, the temp is likely to drop to the dp.
It'd be neat to see where that happens frequently and where it doesn't. Inland places that generally get clear nights with little wind?
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Old 01-19-2017, 03:00 PM
 
Location: Paris
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I'd assume so. Here's Grenoble's latest graph. Temp dropping to dew point daily as I was expecting:





Frost hollows like Chicopee will often see the temp dropping below daytime dewpoint whenever it's reasonably clear and calm:
http://www.infoclimat.fr/observation...ine/06617.html



Frost hollow in full force that night. See the dewpoint dropping from the 20s to the -20s °F in one night, with a relative humidity consistently 90%+:
http://www.infoclimat.fr/observation...ine/06617.html
http://www.infoclimat.fr/observation...ine/06617.html
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Old 01-19-2017, 04:11 PM
 
Location: Near the Coast SWCT
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Quote:
Originally Posted by Rozenn View Post
I'd assume so. Here's Grenoble's latest graph. Temp dropping to dew point daily as I was expecting:
Isn't it better for us to say that the dews and temps are dropping rather than temps are dropping to dews?


Like on Grenoble's OBS its not like the dews were staying low and the temp dropped to it, they both dropped together.


This is why to me it made no sense hearing the statement. Maybe this is just 1 example but Airmasses change, sun goes down, clouds around, ect ect. So many factors that the 2 indicators are separate. Sometimes they move together, sometimes the temp does meet it down low at night, sometimes they stay separate.


But I wouldn't say "temp dropping to dewpoint" with that location for past 3 days. Looks like they both moved together and not far apart anyway
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