You may have noticed the drier air this afternoon. Dewpoints are in the 50s. The dewpoint is a good measure of how much moisture is in the air. The higher the dewpoint the more muggy it is.
Here’s a look at temperatures at 3pm this afternoon. Note the dewpoints in the 50s and NE winds above 10 mph. That doesn’t happen very often in August.
HOW DID DRY AIR GET HERE?
Yesterday morning a cold front passed thru DFW with little fanfare. We had no rain, but we did have a wind shift. Winds yesterday were out of the north. That north wind continued today and has brought drier air down from the north.
Drier air and clear skies tonight will make for a great night. The heat from the day will escape back into space overnight. This is called radiational cooling. That will allow temps to drop into the 60s for just about all of us. The only exception maybe downtown Dallas which may only drop to 70 with the heat island effect. Below are the overnight lows.
Wednesday will be very much like our Tuesday. Sunny skies with relatively low humidity. Temperatures will climb into the mid 90s, which is below our average high of 97.
The heat slowly builds as we go into the weekend. Temperatures will likely get close to 100 Friday thru early next week if not reach it a few days. I have just isolated rain chances over the weekend, but the latest trend of the models is to keep rain chances to the north of North Texas. So bet on a mostly dry weekend at this point.