*As of Aug 5, 4 PM local time.*
Dangerous heat this afternoon
Dangerous heat is the main weather story in McKinney this afternoon, with an air temperature of 99F and a feels-like reading of 102F under clear sky. Relative humidity is 33%, with a dew point of 64F. Wind is 11 mph, with gusts to 13 mph.
The heat is close to today’s forecast high near 100F, and the official forecast says heat index values may reach as high as 104. The chance of precipitation today is 1%, and the day stays sunny.
Tonight and tomorrow
Tonight brings mostly clear conditions, with a low near 79F. Forecast heat index values tonight may be as high as 102. South southeast wind is expected at 5 to 10 mph.
Tomorrow looks similar: sunny, with a high near 99F and a low near 79F. The chance of precipitation is 1%. Forecast heat index values tomorrow may be as high as 102, with south southwest wind at 5 to 10 mph.






