National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Flooding Risks from Tropical Moisture Across the Southeast and Southwest

Tropical moisture from Isaias and Rachel will impact portions of the Southeast and Southwest this weekend. Flash flooding, strong winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, strong winds and dry fuels are raising fire weather concerns across the central Great Basin and western High Plains. Across the northern Rockies, first winter storm of the season. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

82°F

28°C

Humidity 42%
Wind Speed S 3 mph
Barometer 30.05 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 10 Oct 9:50 am CDT
Extended Forecast for

Collinsville TX

  • Today

    Today: Sunny, with a high near 90. South wind around 5 mph.

    High: 90 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 63. South wind around 5 mph.

    Low: 63 °F

    Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 91. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 91 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 69. South wind 5 to 10 mph.

    Low: 69 °F

    Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 89. South wind around 10 mph, with gusts as high as 20 mph.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 73. South wind 5 to 10 mph.

    Low: 73 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 74. South southeast wind around 5 mph.

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 91 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 90. South wind around 5 mph.
Tonight
Clear, with a low around 63. South wind around 5 mph.
Sunday
Mostly sunny, with a high near 91. South wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 69. South wind 5 to 10 mph.
Columbus Day
Sunny, with a high near 89. South wind around 10 mph, with gusts as high as 20 mph.
Monday Night
Clear, with a low around 73. South wind 5 to 10 mph.
Tuesday
Sunny, with a high near 92. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 74. South southeast wind around 5 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. South wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Collinsville TX
 33.55°N 96.9°W (Elev. 696 ft)
Last Update:
6:06 am CDT Oct 10, 2026
Forecast Valid:
11am CDT Oct 10, 2026-6pm CDT Oct 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation