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Heavy Rainfall Continues in Hawaii; Severe Thunderstorms and Heavy Rainfall in the Plains and Southern Appalachians

Areas of gusty winds, heavy rain leading to flash flooding, and high surf continue across portions of Hawaii as Tropical Storm Lala continues to move away from the islands. Severe thunderstorms and heavy rainfall will shift into the southern Appalachians today. Strong to severe thunderstorms may produce large hail, scattered wind gusts, and heavy rain today across the northern and central Plains. Read More >

Click a location below for detailed forecast.

Last Map Update: Mon, Aug 17, 2026 at 2:38:49 pm EDT

 

Just some minor tweaks to the Slight Risk (2/5) area for the afternoon update. Strong to damaging winds, heavy rain, and frequent lightning will all be possible beneath thunderstorms this afternoon and evening. Make sure to have multiple ways to receive any watch or warning information. If thunder roars, go indoors.
Make sure to practice heat safety! Drink plenty of fluids, avoid outdoor activities during the hottest part of the day, stay in air conditioning, and don't forget your pets and check in on relatives and neighbors!
Showers and storms will move through the area this afternoon into the evening, with the stronger storms bringing a threat of damaging wind gusts and localized flooding. Drier weather is expected for Tuesday and Wednesday, and afternoon humidity will be lower both days.
Showers and storms will move through the area this afternoon into the evening, with the stronger storms bringing a threat of damaging wind gusts and localized flooding. Drier weather is expected for Tuesday and Wednesday, and afternoon humidity will be lower both days.
Showers and storms will move through the area this afternoon into the evening, with the stronger storms bringing a threat of damaging wind gusts and localized flooding. Drier weather is expected for Tuesday and Wednesday, and afternoon humidity will be lower both days.
Each observation point is apart of our COOP program (Cooperative Observer Program). Each site has a 24 hour observation period that ends and begins at 8 am local time. Each site records temperature, precipitation, and snowfall data. More information about the COOP program can be found here www.nws.noaa.gov/om/coop/ Data began being collected at: Cades Cover on 01/01/1999 || Mount LeConte on 07/01/1987 || Newfound Gap on 01/01/1991 || Sugarlands Visitor Center on 12/01/1921

 Current Weather Observations...
Location Time
(EDT)
Weather Vsby.
(SM)
Temp.
(ºF)
Dewpt.
(ºF)
Hum.
(%)
Wind
(mph)
Wind Chill / Heat Index
(ºF)
Pres.
(in)
Abingdon VA14:15Lightning Observed10847370WSW 10G16-30.05
Andrews-Murphy NC13:55Partly Cloudy10897257SW 696 [HI]30.07
Chattanooga TN13:53Clear10987142SW 7107 [HI]30.00
Crossville TN13:53Partly Cloudy10907255VRB 797 [HI]30.06
Dalton GA14:15Mostly Cloudy10937657CALM106 [HI]30.01
Knoxville TN (McGhee-Tyson)13:53Partly Cloudy10927354SSW 7G17101 [HI]29.99
Middlesboro KY14:15Partly Cloudy10897561SSW 799 [HI]30.00
Monroe Cnty TN13:55Clear10937863SSW 10109 [HI]30.01
Morristown TN14:15Clear8897870VRB 5103 [HI]30.01
Oak Ridge TN13:53VRB 5-30.01
Tazewell Cnty VA12:35Mostly Cloudy10777080W 6-30.14
Tri-Cities TN13:53Mostly Cloudy10897461W 698 [HI]30.02
Wise VA14:15Light Rain With Thunder \ Lightning Observed76969100WSW 8G20-30.09
Greeneville, TN13:55Mostly Cloudy10877362VRB 694 [HI]30.03


Local Weather History For August 17th...
In 2010, slow moving storms created flooding northeast TN and southwest VA. 1 drowned.

 

 

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