
Severe Storms Thrash Great Plains to Mid-Atlantic
Multiple severe thunderstorm systems are expected to form today, running from the northern Plains to the Mid-Atlantic.
# HEADLINE -------------------- HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT FRIDAY # DETAILS -------------------- WHAT Heat index values up to 108. WHERE A portion of Middle Tennessee. WHEN Until 9 PM CDT Friday. IMPACTS Hot temperatures and high humidity may cause heat illnesses. ISSUED AT Wednesday, August 12, 2026 at 12:14 AM CDT ISSUED BY National Weather Service Nashville TN HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. # AREAS AFFECTED -------------------- Cheatham, Lawrence, Williamson, Bedford, Cannon, Coffee, Davidson, Dickson, Giles, Hickman, Houston, Humphreys, Lewis, Macon, Marshall, Maury, Montgomery, Perry, Robertson, Rutherford, Smith, Stewart, Sumner, Trousdale, Wayne, Wilson Including the cities of Goodlettsville, Hartsville, Lebanon, Lafayette, McEwen, South Carthage, Tullahoma, Clifton, Mount Juliet, La Vergne, Smyrna, New Johnsonville, Shelbyville, Nashville, Gallatin, Erin, Waverly, Linden, Dickson, Springfield, Lawrenceburg, Brentwood, Tennessee Ridge, Carthage, Woodbury, Waynesboro, Dover, Ashland City, Columbia, Lewisburg, Pulaski, Centerville, Franklin, Gordonsville, Hendersonville, Manchester, Lobelville, Clarksville, Murfreesboro, Hohenwald, and Kingston Springs
A Weather Alert has been issued for a nearby area. While your current location is outside of the impacted area, please stay alert and monitor weather conditions. # SUMMARY -------------------- The National Weather Service in Nashville has issued a - Flash Flood Warning for... Southwestern Cannon County in Middle Tennessee... Northeastern Coffee County in Middle Tennessee... East Central Rutherford County in Middle Tennessee... Southwestern Warren County in Middle Tennessee... - Until 145 AM CDT. - At 1140 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 2.5 inches of rain have fallen. The expected rainfall rate is 2 to 3 inches in 1 hour. Flash flooding is ongoing or expected to begin shortly. # DETAILS -------------------- HAZARD Flash flooding caused by thunderstorms. SOURCE Radar indicated. IMPACT Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE Woodbury, Morrison, Bradyville and Readyville. ISSUED AT Tuesday, August 11, 2026 at 11:40 PM CDT ISSUED BY National Weather Service Nashville TN HEADER BULLETIN - EAS ACTIVATION REQUESTED | Flash Flood Warning # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Closest strike: 9.03 miles Stay Alert! Remain in a safe area until there has been no lightning within 10 miles of this location for 30 minutes. Please be aware that lightning activity can remain high even when a storm is moving away from your location. Even if rain has stopped, do not leave your safe area until WeatherBug indicates that lightning is more than 10 miles away from this selected location. IF OUTDOORS Avoid water, high ground, and open spaces. Avoid all metal objects including electric wires, fences, and machinery. Find a safe area in a building or in a fully enclosed vehicle with the windows completely shut. Unsafe places include underneath canopies, small picnic or rain shelters, convertibles, or near trees. IF INDOORS Avoid water and stay away from doors and windows. Avoid using a hard line telephone. Take off headphones. Turn off, unplug, and stay away from appliances, computers, power tools, and TV sets. Lightning may strike exterior electric and phone lines, inducing shocks to inside equipment.
There is a Marginal Severe Storm Risk for your location. Continue reading for today's outlook from the National Weather Service's Storm Prediction Center. -------------------- National Severe Storm Outlook THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE DAKOTAS AND NORTHERN NEBRASKA...AND FROM NORTHERN ILLINOIS TO WESTERN NORTH CAROLINA SUMMARY Severe storms posing a risk for large hail and damaging winds are possible into tonight from the Dakotas into the Midwest. IL to western NC A bowing line of storms from central KY into northeast TN/western VA will continue to develop southeast the next few hours. A damaging wind risk will continue with this activity in the short term. However, convection should begin to wane with southeast extent into the Appalachians as instability wanes and loss of daytime heating results in a cooling boundary layer. Convection across KY and perhaps portions of eastern TN may remain stronger into the evening given the large reservoir of instability ahead of storms, but overall expected is for a gradual weakening trend. Reference MCD 1939 for more short term details. Overnight, most CAMs guidance suggests convection will redevelop within a warm advection regime across parts of northern IL into IN and the Ohio Valley. The 00z DVN and ILX RAOBs depict an impressive thermodynamic and kinematic environment. Midlevel lapse rates near 8 C/km amid 40 kt effective shear and MUCAPE near 5000 J/kg with weak inhibition suggests any storms developing within this environment could be severe. Convection may develop along the instability gradient and large hail is possible. If sufficient clustering occurs, damaging wind also could be possible. As a result, the Slight (level 2 of 5) risk as been expanded back to the northwest across northern IL. Dakotas into IA Supercells across the western Dakotas and far northern NE will continue to pose a risk for very large hail and damaging gusts the next few hours. See MCD 1938 for short term information on severe risk. It is uncertain how convection will evolve longer-term during the overnight hours. Some guidance suggests clustering will occur and an MCS could develop, moving east/southeast across SD/northern NE and perhaps as far east as IA. Ample west/northwesterly flow aloft is in place, along with a very moist airmass with strong to extreme instability. If sufficient clustering can occur, MCS development/maintenance seems plausible. have expanded the Slight (level 2 of 5) risk eastward across SD/NE into western IA border vicinity for this possibility.












