An 86 deg. F dew point!!

[Dan Chaffee]

An hour ago, Orange City, Ia recorded an 86 deg. dew point. I don't remember ever seeing this anywhere in conus. That's higher than
typical Bangkok, Thai values! Unbelieveably enough, there are locations
that commonly experience 90+ deg. F dew points; Yeman for example.

 

[Craig Maire II]

Having an 86F dewpoint must be like being in the tropics! Here in Iowa the highest dewpoint I have seen was 83F a few years ago. A heat advisory has been issued for my area tomorrow where temps will be in the 90s with dewpoints running in the 70s to near 80F!! :shock:

 

[Robert Dewey]

We hit 81F or so a few days ago in MI, at least according to the METAR data.

 

[Mike Hollingshead]

Dang someone beat me to it. I was out earlier today and it was just too damn hot and nasty. The terrain over there in the hills seems to allow the dews to pool higher than normally around all the corn. I've been watching those 80 TD readings over there much of the day. I missed the 86, but in Onawa IA right now it is reading 99/85. "Fun" stuff. It doesn't hardly seem fair that this area honestly sees the highest TD and temps(combo) each summer in the US and during the winter gets to be too damn cold too.

Oh yeah and spc meso page indicating sbcabe of 8000 in sw IA.

 

[David Draun]

Package that air up in mass quantities, and send it over here. I need some convection. :wink:

 

[Nic Wilson]

One should be careful when getting too excited about many of the Iowa AWOS/ASOS station's dewpoints thanks to their close proximity to corn fields. During warm spells like this the microscale evapotranspiration from the corn can see pretty extreme dew point spikes...I have no doubts that the ambient Td is around 80F but that 86F value is probably aided by some dense corn nearby.

 

[Dan Chaffee]

Originally posted by Nic Wilson
One should be careful when getting too excited about many of the Iowa AWOS/ASOS station's dewpoints thanks to their close proximity to corn fields. During warm spells like this the microscale evapotranspiration from the corn can see pretty extreme dew point spikes...I have no doubts that the ambient Td is around 80F but that 86F value is probably aided by some dense corn nearby.

Sure , but to someone who must to work in, or for animals that are subjected to those conditions, it makes no difference what is responsible for the spikes.

 

[Mike Hollingshead]

Yeah alot of western IA has been reading above 80 for TDs today. NE has alot of corn but the readings aren't as bad. I think more than anything it is the terrain there AND the moisture convergence(pooling) going on in that area right now. Onawa is now 101/87.

 

[Shane Adams]

Originally posted by Nic Wilson
One should be careful when getting too excited about many of the Iowa AWOS/ASOS station's dewpoints thanks to their close proximity to corn fields. During warm spells like this the microscale evapotranspiration from the corn can see pretty extreme dew point spikes...I have no doubts that the ambient Td is around 80F but that 86F value is probably aided by some dense corn nearby.

Doesn't matter if it's in close proximity to a cornfield or not - an 86 dewpoint is murder. I think the emphasis in this case is more on the human effect and not the meteorological cause/effect.

I am outside all day, most days, and I could tell a difference in today's conditions as opposed to the past few weeks. I don't know what the HI was today but I'd bet it was at least 100. I can only imagine our heat (Norman) with an 86 dewpoint. That's simply suffucation on land.

 

[W. Grant Dade]

WOW! That makes the heat index near 140°F depending on what the air presure was at the time.

 

[Joel Wright]

Right now in Sioux City IA the dewpoint is 83°. That makes the heat index 109° at 10:00pm!!!

 

[Justin Turcotte]

There was apparently a 90F dewpoint recorded yesterday at 2005z at KENL (near Mt. Vernon, IL) if the decoder at work is accurate. A couple hours of 88F dews to boot. 97 over 90 is just plain nuts. The highest dew I've ever heard of was 94 on the Red Sea coast of Saudi Arabia with a heat index of 154F. U Wyoming has surface data for the Middle East. I noted some 110/75 obs there. Yuck!

 

[Marcus Opitz]

Its amazing how it can get this hot yet be below zero 6 months from now....temps were in the upper 90s-low 100s with dewpoints in the mid 70s. I guess that is one of the perils of living in the midwest. The early settlers must have had a rough time without the luxury of convienent heat and a/c :? (not to mention the violent weather not seen by many early settlers)

 

[Craig Maire II]

I've never heard of a 90F dewpoint temp in the US before, looks like it may be a LOOOOOOOOOOONG, summer... :shock: :cry: :lol:

 

[Patrick Ware]

Originally posted by Craig Maire II
I've never heard of a 90F dewpoint temp in the US before, looks like it may be a LOOOOOOOOOOONG, summer... :shock: :cry: :lol:

I don't know how long it will be, but it certainly appears that it will be a humid one. Those are really high dew points.