Excessive Rainfall Potential for the Southeast; Heat Expands for Center of the Nation; Critical Fire Weather for Pacific Northwest

Flash flooding threatens areas from the Tennessee Valley to the Carolinas as storms repeat along a stalled front. Monsoonal storms may trigger flooding in the Southwest. Dangerous heat expands across the Desert Southwest, Plains, mid-Mississippi Valley and Southern Tier. Critical fire weather for interior Pacific Northwest. Cooler, drier air brings brief relief to the Great Lakes and Northeast. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Overcast

75°F

24°C

Humidity	94%
Wind Speed	SW 7 mph
Barometer	29.96 in (1013.4 mb)
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Last update	26 Jul 5:53 am EDT

More Information:

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

Extended Forecast for

4 Miles WSW Mascot TN

Today
High: 88 °F
Showers
Likely then
Mostly Sunny
Tonight
Low: 71 °F
Partly Cloudy
Monday
High: 89 °F
Slight Chance
T-storms
Monday Night
Low: 74 °F
Partly Cloudy
Tuesday
High: 91 °F
Chance
Showers then
T-storms
Likely
Tuesday Night
Low: 71 °F
Showers
Likely
Wednesday
High: 86 °F
Mostly Sunny
Wednesday Night
Low: 66 °F
Mostly Clear
Thursday
High: 86 °F
Sunny

Detailed Forecast

Today

Showers and thunderstorms likely, mainly before 8am. Partly sunny, with a high near 88. Heat index values as high as 96. Calm wind becoming northwest around 5 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight

Partly cloudy, with a low around 71. Calm wind.

Monday

A 20 percent chance of showers and thunderstorms, mainly between 2pm and 3pm. Mostly sunny, with a high near 89. Heat index values as high as 98. Calm wind becoming west around 5 mph.

Monday Night

Cloudy during the early evening, then becoming partly cloudy, with a low around 74. Calm wind becoming southwest around 5 mph after midnight.

Tuesday

Showers and thunderstorms likely, mainly between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly sunny and hot, with a high near 91. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

Tuesday Night

Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 71. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.

Wednesday

Mostly sunny, with a high near 86. Northwest wind around 5 mph.

Wednesday Night

Mostly clear, with a low around 66.

Thursday

Sunny, with a high near 86.

Thursday Night

Mostly clear, with a low around 66.

Friday

Mostly sunny, with a high near 87.

Friday Night

Partly cloudy, with a low around 68.