Heavy Rainfall and Flooding Threats in the Midwest and Ohio Valley; Heat Continues in the Plains and Southeast

An active pattern will continue to bring heavy to excessive rainfall and flash flooding threats to the Midwest and Ohio Valley over the next couple of days. Dangerous heat continues across the central/southern Plains and Southeast U.S. into next week. There is potential for record-tying/breaking temperatures with many areas forecast to see their hottest temperatures so far this year. Read More >

Click a location below for detailed forecast.

Last Map Update: Wed, Aug 12, 2026 at 8:54:35 pm EDT

Watches, Warnings & Advisories

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National Weather Service Atlanta/Peachtree City, GA

National Weather Service Greenville-Spartanburg, SC

Heat Advisory

Flood Advisory

Flood Watch

Special Weather Statement

Hazardous Weather Outlook

Flash Flood Watch

Tonight

Tomorrow

Smoky Mtn Observations

Additional showers and thunderstorms are expected this afternoon and through the overnight hours. However, the confidence in how widespread they are is low. Some locations will likely see heavy rains, upwards of 2 to 3 inches. Areas that received heavy rain yesterday will be more susceptible to flash flooding if they receive additional heavy rainfall today and tonight. A Flash Flood Watch is in effect through 8 AM EDT Thursday morning, generally along I-40 and northward.

Chances for showers and storms continue today and into tonight. Isolated flooding and damaging straight line winds remain possible. Temperatures increase Friday and into the weekend, with Heat Index values nearing advisory levels.

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 VA	20:35	Overcast	10	73	69	88	S 6	-	30.03
Andrews-Murphy NC	20:35	Clear	10	76	71	85	CALM	-	30.02
Chattanooga TN	19:53	Clear	10	87	73	63	SSW 6	95 [HI]	29.93
Crossville TN	19:53	Clear	10	80	72	76	W 3	-	30.00
Dalton GA	20:35	Partly Cloudy	9	82	82	100	CALM	95 [HI]	29.95
Knoxville TN (McGhee-Tyson)	19:53	Cumulonimbus Clouds, Lightning Observed	10	84	73	69	S 5	-	29.93
Middlesboro KY	20:35	Lightning Observed	10	80	76	90	CALM	-	29.98
Monroe Cnty TN	20:15	Partly Cloudy	10	84	78	83	CALM	95 [HI]	29.94
Morristown TN	20:15	Clear	9	78	77	94	CALM	-	29.96
Oak Ridge TN	19:53	Clear	10	86	74	67	CALM	94 [HI]	29.95
Tazewell Cnty VA	20:35	Lightning Observed	10	69	63	82	CALM	-	30.08
Tri-Cities TN	19:53	Mostly Cloudy	10	79	70	73	CALM	-	29.98
Wise VA	20:35	Lightning Observed	10	69	69	100	N 8	-	30.07
Greeneville, TN	20:15	Overcast	10	77	73	88	CALM	-	29.99

Local Weather History For August 12th...

In 1977, a weak tornado touched down near Chattanooga causing minor damage to a dock.


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