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

Flooding Risks from Tropical Moisture Across the Intermountain West and East Coast

Tropical moisture from Isaias and Rachel will impact portions of the Intermountain West and East Coast states. Flooding, gusty winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, record warmth will spread northward across the Mississippi Valley the next few days. Looking for snow, the first winter storm of the season is underway across the northern Rockies. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair and Breezy

86°F

30°C

Humidity 46%
Wind Speed SW 21 mph
Barometer 30.08 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 11 Oct 12:50 pm CDT
Extended Forecast for

Southmayd TX

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 89. South wind around 15 mph, with gusts as high as 20 mph.

    High: 89 °F

    Mostly Sunny

  • Tonight

    Tonight: Clear, with a low around 69. South wind around 10 mph.

    Low: 69 °F

    Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 88. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming clear, with a low around 73. South wind around 10 mph.

    Low: 73 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 91. South wind around 10 mph, with gusts as high as 20 mph.

    High: 91 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 73. South wind around 10 mph.

    Low: 73 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 90 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70. South southeast wind around 10 mph.

    Low: 70 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83. South southwest wind around 10 mph.

    High: 83 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 89. South wind around 15 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 69. South wind around 10 mph.
Columbus Day
Sunny, with a high near 88. South wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
Mostly cloudy, then gradually becoming clear, with a low around 73. South wind around 10 mph.
Tuesday
Mostly sunny, with a high near 91. South wind around 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 73. South wind around 10 mph.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90. South wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70. South southeast wind around 10 mph.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83. South southwest wind around 10 mph.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.
Friday
A 20 percent chance of showers. Partly sunny, with a high near 72.
Friday Night
Partly cloudy, with a low around 54.
Saturday
Sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Southmayd TX
 33.62°N 96.71°W (Elev. 820 ft)
Last Update:
6:06 am CDT Oct 11, 2026
Forecast Valid:
1pm CDT Oct 11, 2026-6pm CDT Oct 17, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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