*As of Sep 20, 2 PM local time.*
Dangerous Heat Conditions
McKinney is experiencing dangerous heat this afternoon. The air temperature is currently 97F, but the heat index makes it feel like 104F. These conditions are compounded by a dew point of 70F and relative humidity at 42%, creating a muggy atmosphere.
Winds are blowing from the south at 14 mph with gusts up to 20 mph, though the sky remains clear. The official forecast indicates a high near 95F for today, with temperatures falling to around 93F in the afternoon. Heat index values may reach as high as 98F.
There is only a 10% chance of precipitation, and new rainfall amounts are expected to be less than a tenth of an inch. Residents should stay hydrated and limit midday exertion to avoid heat-related illness.
Tonight’s Storms
Conditions will shift as night approaches. A chance of showers and thunderstorms is expected between 7pm and 10pm, followed by another window of storms between 10pm and 4am. The sky will be mostly cloudy, with a low around 74F.
East southeast winds will slow to 0 to 5 mph. The chance of precipitation rises to 50%, with new rainfall amounts between a tenth and a quarter of an inch possible. Drivers should exercise caution on wet roads during these periods.
