Air is so dry it cools off quickly and heats up quickly during the day.
Our gently rolling terrain combined with rapid transition between the outer suburbs and very sparsley populated areas can result in wide temperature variances on calm, clear nights. There was a night back in October 2021 when my car thermometer showed 72 degrees at NW 10th & Garth Brooks, and dropped to 51 degrees at NW 10th & Cimarron, just three miles to the west. The OKC East Mesonet site will sometimes be 10 degrees cooler than areas just a mile or two to the west if conditions are right, due to its location in the river valley and lack of urban heat island influence relative to Downtown/Midtown OKC.
Drought intensifies through at least the back half of October.
No moisture available as long as there is a closed-off tropical low in the Gulf. For us or the rest of the country outside of Florida and the Pacific NW. This could actually be an historically dry October for many areas. I don’t think I’ve ever seen models trending this dry 2-3 weeks out and I’ve been following weather models daily for the past 15 years.
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