McKinney Heat Index Hits 105 Tonight as Temps Climb to 102 Tomorrow - Jul 19, 8 PM

*As of Jul 19, 8 PM local time.*

Current Conditions and Immediate Outlook

McKinney is currently experiencing very hot and humid conditions this Sunday evening. The air temperature stands at 90F, but the combination of heat and moisture makes it feel like 98F. Relative humidity is at 59%, with a dew point of 73F, contributing to the muggy atmosphere.

Winds are blowing from the south at 7 mph, with gusts reaching up to 11 mph. The sky remains partly cloudy as the day winds down.

Today, the high reached near 96F, while the low settled near 79F. There was a 24% chance of precipitation, with a slight possibility of showers and thunderstorms earlier in the day before skies cleared. For tonight, a slight chance of showers and thunderstorms is possible before 10pm.

Afterward, conditions will become mostly clear. The low will drop to around 79F. Heat index values are expected to reach as high as 105.

South winds will persist at 5 to 10 mph, with a 20% chance of precipitation.

Tomorrow's Forecast and Safety Notes

Tomorrow, McKinney will see a significant increase in heat. The sky will be sunny with a high near 102F. The low will be near 80F.

The chance of precipitation drops to just 1%. Heat index values will climb to as high as 108. Southwest winds will be light, around 5 mph.

Tomorrow night will be clear, with a low around 80F. Temperatures may rise to around 82 overnight. Heat index values will remain high at 107, with south southwest winds around 5 mph.

There are no active National Weather Service or NOAA weather alerts for this area. However, the extreme heat requires caution. Residents should stay hydrated and limit prolonged outdoor exertion during the hottest parts of the day.

Check on neighbors and vulnerable individuals who may be affected by the high heat indices. Ensure pets have access to cool, shaded areas and plenty of water. As temperatures rise, be mindful of the increased risk of heat-related illnesses.

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Sources

National Weather Service radar

National Weather Service forecast data

Open-Meteo weather data