*As of Aug 11, 4 AM local time.*
Conditions and Alert Status
A Heat Advisory is currently active for McKinney, Texas, indicating moderate severity and expected urgency. This alert remains in effect through the overnight hours and into tomorrow evening. Residents should be aware that the combination of high heat and significant moisture will make conditions feel much hotter than the actual air temperature.
Current observations show an air temperature of 79F with a feels-like reading of 80F. The atmosphere is quite humid, with relative humidity at 74% and a dew point of 70F. Winds are blowing from the south at 9 mph, with gusts reaching up to 21 mph. The sky remains clear as we move through this overnight period.
Forecast for Today and Tomorrow
Today will be sunny with a high near 99F and a low near 78F. The chance of precipitation is minimal at just 1%. According to the National Weather Service, heat index values are expected to reach as high as 106 during the day. South southwest winds will average around 10 mph, with gusts potentially hitting 20 mph.
Tonight, skies will remain clear or mostly clear. Temperatures will drop to a low around 78F initially, but will rise to approximately 80F by morning. Overnight lows may feel closer to 79F with temperatures rising to around 81F later in the night. Heat index values could reach 104. South winds will continue at 10 mph.
Tomorrow brings another sunny day with a high near 100F and a low near 79F. There is no chance of precipitation. The heat index will remain elevated, with values as high as 104.
