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Re: Not suprsied.

Message from Matthew Dallas TX

DFW is the 4th largest MSA in the US. There is a very strong urban heat island effect present, but the airports' temps are not representative of the range of atmosperic temp differences in the metro area. Urban morphology creates the temp differences. The largest difference in temps due to the UHI effect can be observed just before sunrise- not during the day. On average, the temp diff is 5-6*. Many nights during summer, fall and spring can produce differences of 8*-10*. The USDA zone range in DFW is from 7b to 8b. The UHI is often overrated in terms of plant survival as the UHI effect goes away when an Arctic blast rolls in.


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