Areas of Excessive Rainfall and Extreme Heat; Monitoring Tropical Storm Erin

Heavy to excessive rainfall over the southern Appalachians may bring areas of flooding Tuesday. Hot to extremely hot temperatures are in place through Tuesday across much of the western U.S. and northern New England. Tropical Storm Erin is forecast to become a Major Hurricane by this weekend as it moves across the central Atlantic Ocean. Monitor future forecasts for any East Coast impacts. Read More >

Hazardous Weather Conditions

Air Quality Alert

Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Mostly Cloudy

80°F

27°C

Humidity	74%
Wind Speed	Calm
Barometer	29.98 in (1014.3 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	83°F (28°C)
Last update	12 Aug 12:53 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

3 Miles E Prosper TX

Overnight
Low: 78 °F
Chance
T-storms
Tuesday
High: 94 °F
Chance
T-storms
Tuesday Night
Low: 75 °F
Slight Chance
T-storms then
Partly Cloudy
Wednesday
High: 94 °F
Slight Chance
T-storms
Wednesday Night
Low: 75 °F
Mostly Clear
Thursday
High: 96 °F
Sunny
Thursday Night
Low: 78 °F
Mostly Clear
Friday
High: 97 °F
Sunny
Friday Night
Low: 78 °F
Partly Cloudy

Detailed Forecast

Overnight

A 30 percent chance of showers and thunderstorms, mainly before 4am. Partly cloudy, with a steady temperature around 78. East southeast wind around 5 mph.

Tuesday

A 30 percent chance of showers and thunderstorms, mainly between 1pm and 4pm. Mostly sunny, with a high near 94. Heat index values as high as 101. Calm wind becoming north northwest around 5 mph.

Tuesday Night

A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 75. Northeast wind around 5 mph becoming calm in the evening.

Wednesday

A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94. Heat index values as high as 103. Calm wind becoming south around 5 mph in the afternoon.

Wednesday Night

Mostly clear, with a low around 75. East wind around 5 mph becoming south after midnight.

Thursday

Sunny, with a high near 96. South wind 5 to 10 mph.

Thursday Night

Mostly clear, with a low around 78. Southeast wind around 10 mph.

Friday

Sunny, with a high near 97. South wind 5 to 10 mph.

Friday Night

Partly cloudy, with a low around 78. South southeast wind around 10 mph.

Saturday

Sunny, with a high near 96.