Heat Continues in the Northeast and Northwest U.S.; Areas of Flash Flooding In the Ohio Valley and Southwest

Dangerous heat will continue to impact portions of the interior Northwest and Northeast U.S. Some relief is expected by Wednesday for the Northeast. Monsoon showers and thunderstorms may result in flash flooding and debris flows from the Four Corners region into the Great Basin this week. Thunderstorms, some severe, may produce excessive rainfall from the Ohio Valley to the Central Appalachians. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

En Español

Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Fair

75°F

24°C

Humidity	82%
Wind Speed	Calm
Barometer	30.04 in (1016.6 mb)
Dewpoint	69°F (21°C)
Visibility	10.00 mi
Last update	10 Aug 12:53 am CDT

More Information:

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

Extended Forecast for

Melissa TX

Overnight

Mostly Cloudy
Low: 75 °F
Wednesday

Chance
T-storms
High: 96 °F
Wednesday
Night

Chance
T-storms
Low: 74 °F
Thursday

Slight Chance
T-storms
High: 94 °F
Thursday
Night

Mostly Clear
Low: 74 °F
Friday

Sunny then
Slight Chance
T-storms
High: 93 °F
Friday
Night

Slight Chance
T-storms then
Mostly Clear
Low: 74 °F
Saturday

Sunny
High: 94 °F
Saturday
Night

Mostly Clear
Low: 75 °F

Detailed Forecast

Overnight

Mostly cloudy, with a low around 75. East southeast wind around 5 mph.

Wednesday

A 40 percent chance of showers and thunderstorms, mainly after 11am. Partly sunny, with a high near 96. Heat index values as high as 101. Southeast wind around 5 mph becoming north in the afternoon.

Wednesday Night

A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 74. East southeast wind around 5 mph becoming calm after midnight.

Thursday

A slight chance of showers and thunderstorms between 8am and 2pm. Mostly sunny, with a high near 94. Heat index values as high as 97. Light east wind becoming east northeast 5 to 10 mph in the afternoon. Chance of precipitation is 20%.

Thursday Night

Mostly clear, with a low around 74. East northeast wind 5 to 10 mph becoming light east southeast after midnight.

Friday

A slight chance of showers between 2pm and 5pm, then a slight chance of showers and thunderstorms after 5pm. Sunny, with a high near 93. Light east southeast wind becoming east 5 to 10 mph in the morning. Chance of precipitation is 20%.

Friday Night

A 20 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 74. East wind 5 to 10 mph.

Saturday

Sunny, with a high near 94. Light east wind becoming east southeast 5 to 10 mph in the morning.

Saturday Night

Mostly clear, with a low around 75. East southeast wind 5 to 10 mph.

Sunday

Sunny, with a high near 97.

Sunday Night

Mostly clear, with a low around 77.

Monday

Sunny and hot, with a high near 99.