If you were out early in the morning (or late into the night) you might have noticed the VERY bright moon last night. Atmospheric conditions were perfect for the full illumination of the Supermoon. It went below horizon just as the day dawned. I was in my backyard around 5:30am and wondering why my neighbor Dean had all his backyard lights on. Turned out it was the moon in the western sky about the same position seen in the photo below by Don Clark in McKinney. I can’t remember seeing a moon that bright before other than when over snow.
It didn’t take long later in the morning to know we were in for a hot day. The skies were very clear in the morning, a sign of high pressure building in. Robert Baker in Muenster took this sunrise shot over some wind towers (Oil -boom Texas is America’s number one state in wind energy):
As of 3pm temperatures were creeping closer to that 100° mark.
A southwest wind has lowered the dewpoints. If DFW hits 100° today it’ll be the first triple digit high of the year. You have to go back to 2007 to find a year when DFW waited longer into the summer (that year not until August 11th, the latest 100° day in the last 25 years).
The lower humidity means a lower “feel-like” temperature (basically not a factor) but it also allows for a hotter day. High Pressure ridge centered over Oklahoma is suppressing cloud cover. All this sunshine also nudges those temperatures up closer to those dreaded three numbers.
Everything seems to be in place to produce 100° weather. However when I look at some of the benchmarks (what the temperature is at 5000ft, how many meters apart is the 1000mb pressure level verse the 850mb pressure level [thickness]) I calculate a 99° day. It feels the same believe me.
Besides, if we don’t hit it this afternoon we’ll almost certainly do it tomorrow afternoon. It is (practically) inevitable. The last time we went a summer without hitting 100° was back in 1973. It’s only happened three times (1898, 1906, 1973).
The hottest day so far this year looks to be Monday. Then we have a remarkable change of weather. By Wednesday we’ll start a three-day run of 80° days along with some much-welcomed rain. I’ll talk all about that tonight at CBS11 at 6pm. Join me then! -Jeff Ray