5-Day Forecast for Knoxville, TN

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Change Units:    °F and mph  -   °C and km/h  -   °C and mph (U.K.)

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5-Day Forecast

National Weather Conditions--Current

National Weather Map--Today

Todays National Weather Map

National Weather Forecast--Tomorrow

National Weather Map--Tomorrow

Tomorrows National Weather Map

North America Infrared

This infrared image shows the relative warmth of objects. Colder objects are brighter and warmer objects are darker. Lower layers of clouds are generally warmer and are gray. Colder and higher clouds tops are highlighted in colors.

Infrared Map

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds ); brown indicates very little moisture present; black indicates no moisture.

Water Vapor Map

UV Index Forecast

This map shows expected UV Index values. We all know that exposure to the sun generally feels good and produces Vitamin D for the skin; however, too much exposure to the sun's ultraviolet (UV) radiation can be dangerous as it can cause sunburn, skin cancer and cataracts. The UV Index represents the risk of overexposure to the sun on a scale of 1 to 11+, where 1 is low risk and 11+ is an extreme risk.

UV Index map

National Weather Alerts and Warnings

National Weather Alerts and Warnings. Note that Coordinated Universal Time (UTC) is a 24-hour time standard, is determined using atomic clocks, and expresses the mean solar time at the Earth's prime meridian (zero degrees longitude) located near Greenwich, England. Time zones around the world are expressed as positive or negative offsets from UTC (Eastern Time is -4 hours and Pacific Time is -7 hours). UTC is also often casually interchanged with Greenwich Mean Time (GMT).

National Weather Alerts Map







Weather Topic: What is Drizzle?

Home - Education - Precipitation - Drizzle

drizzle Next Topic: Evaporation

Drizzle is precipitation in the form of water droplets which are smaller than raindrops.

Drizzle is characterized by fine, gently falling droplets and typically does not impact human habitation in a negative way. The exception to this is freezing drizzle, a condition where drizzle freezes immediately upon reaching earth's surface. Freezing drizzle is still less dangerous than freezing rain, but can potentially result in hazardous road conditions.

Next Topic: Evaporation

Weather Topic: What is Freezing Rain?

Home - Education - Precipitation - Freezing Rain

freezing rain Next Topic: Graupel

Freezing rain is a condition where precipitation which has fallen in the form of water droplets reaches temperatures which are below freezing and freezes upon coming into contact with surface objects. The result of this precipitation is a glaze of ice which can be damaging to plants and man-made structures. A severe onset of freezing rain which results in a very thick glaze of ice is known as an ice storm.

Next Topic: Graupel

This page shows the 5-day weather forecast for the following ZIP codes:
27902, 27918, 37194, 37823, 37901, 37902, 37909, 37912, 37914, 37915, 37916, 37917, 37918, 37919, 37920, 37921, 37922, 37923, 37924, 37927, 37928, 37929, 37930, 37931, 37932, 37933, 37934, 37938, 37939, 37940, 37950, 37977, 37990, 37995, 37996, 37998, 97919