• http://twitter.com/SolakNC Tom M

    Sounds reasonable, Brad. I once asked Stu Ostro from NWS RAH about a similar temperature drop at KJNX which is just 2 miles down the road from me. My question was in regards to the wintertime differential between here and RDU, 30 miles to the NW as the crow flys. Another thing he pointed out was that KJNX is approx. 200’+/- lower in elevation than RDU, and also mentioned the ‘lay of the land’ around the airport, although it’s nowhere as busy as CLT. It’s nice to see your similar theory in writing. As it stands, on these clear, calm, cold nights, we can almost always be assured of being, as RAH so fondly refers to us, one of those “…temperatures lower in the usual rural locations” — Tom

    • Anonymous

      Tom, yeah the ASOS at CLT is 4′ lower than that runway and almost 10″ lower than the ridge just to the west. Makes a big difference.

  • Anonymous

    So the question is; Is this really an accurate reading of the official temperature in Charlotte? Seems like the ASOS should be relocated to an area of the airport that provides an better representation of the the true air temperature in Charlotte.

    • Anonymous

      This a valid question & I think yes maybe just to another spot on the the airport grounds. I think the day time highs are fine it’s really the night time lows that maybe a cooler representation of Charlotte as a whole. I will also say the airport is way better than the previous location prior in uptown.

      • Anonymous

        Where was the exact location previously Uptown?

        • Anonymous

          Prior to 1939 is was actually on top of the old uptown post office. LOL

  • http://twitter.com/memphisweather1 MemphisWeather.net

    Brad, Nice write-up and makes sense. One additional question that would help prove your point with the evening temp rise would be to see if you could verify the ground movement of aircraft during those hours. Not sure how US Airways works their “banks” of flights, but is there a scheduled bank of departures during the 9-10pm timeframe and is their preferred departure configuration to the south when wind is light/calm?

    –Erik

    • Anonymous

      Already checking with my neighbor who’s a pilot for them. Problem with public searches so far is you only get the “schedule” departure times. Would love to know which way they are coming in and taking off on that runway.

  • http://twitter.com/bdibar Brian DiBartolo

    nice write-up, Brad. I was wondering where the ASOS was located @ CLT. I believe with the new runway, there should be a discussion of relocating the instruments.

    I have a question in regards to the official ASOS at the Gastonia Municipal airport, has there been any discussion of moving it to be “inside” the city limits? The airport was way out in the county, a good 15-20 minute drive from downtown Gastonia (6 miles away)

    • Anonymous

      Thanks Brian, I agree they need to move Gastonia closer to at least the middle of the county. Heck it’s almost too close to CLT which is why I know something fishy is going on at CLT. I haven’t heard of any plans to move it but more likely would be an additional station in the county closer to downtown.

  • http://twitter.com/Cole_Regan Cole Regan

    As a meteorology student at UNC Asheville, we focus on ASOS quite a bit as it serves as a major part of getting current conditions. I thought this article was very interesting and many of the things you brought up were very well laid out. When I finally found the ASOS at KCLT, I was actually surprised at how close to Runway 18C it is. Having an east wind could send some warm air from the terminal area towards the ASOS, and having two large runways and two taxiways doesn’t provide the best readings. I’m sure many would say we should move it to a different location (like downtown Charlotte) but then you get the effect of the concrete/pavement and other warm factors relative to downtown that don’t help temperature readings. I’d keep it at KCLT, but I’d suggest to the WFO at GSP that they should consider moving it to a different location on the airport property. Looking at the 2010 Google Maps shot you provided, it doesn’t seem that there’s a definite location to put the equipment.

    • Anonymous

      Cole, I agree it should be moved but to a location somewhere on the airport property. That airport expansion sure does make it harder though.

      • http://twitter.com/Cole_Regan Cole Regan

        We may not have the best placement of our ASOS, but of course there’s the famous USC ASOS location. This was the talk of our weather analysis class when we discussed poor locations. I’m not sure if you’ve seen it, but this is terrible! http://wattsupwiththat.files.wordpress.com/2008/03/usc_aerial_asos-520.jpg?w=640

      • http://www.thebetaversion.org Greg Simmons

        And the pending new runway and terminal expansion at KCLT don’t make things any easier. All the extra concrete, jet wash and loss of vegetation just add to wild swings in the temperature.

  • http://twitter.com/MikeOnPipes Mike Lynch

    Brad, I’m a layman when it comes to meteorology, but I really enjoy your posts. This is very interesting AND educational! Thanks for sharing.

    • Anonymous

      Thanks Mike!

  • Anonymous

    Last night was another odd night, though we did have a dry cold front come through and complicate things. The winds were pretty breezy last night but some how we dipped to 31°. check the obs below.

  • Kwazie Wabbit

    Impressive….

  • Anonymous

    so geeky! i love it.

  • Anonymous

    I have never understood how climatological data that was taken in 1900 in uptown/downtown Charlotte can be projected to an airport miles away.

    • Anonymous

      Cannoneer, yeah it’s an issue when you compare downtown temps prior to 1939 to temps after at the airport. I sometimes separate climate numbers from the airport and downtown for this reason.

  • Anonymous

    And wxbrad…thanks!

  • Anonymous

    I knew something was different at the airport. There are businesses located on Eastway Drive and Sugarcreek Road which post temperatures that are typically higher than it is at the airport. Thank you for this article.

Back to top