Widespread rain and a few thunderstorms affected much of Middle Tennessee during the morning hours on September 23. One report of minor flooding was received in Williamson County.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS OHX wrote it up.
Widespread rain and a few thunderstorms affected much of Middle Tennessee during the morning hours on September 23. One report of minor flooding was received in Williamson County.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Nashville, TN wrote its last area forecast discussion before the first event at Sep 23, 8:54 AM CST, 6 minutes earlier.
Area Forecast Discussion National Weather Service Nashville TN 954 AM CDT Sun Sep 23 2018 .UPDATE... FOR MORNING DISCUSSION. && .DISCUSSION... At mid morning, showers with a few rumbles of thunder covered much of the Mid State. Breaks in the rain were noted around Manchester and McMinnville in the southeast as well as Dover in the northwest. The showers were occurring along a stalled frontal boundary that has been over the area since Friday. Rainfall totals have been mainly in the 0.5 to 1.5 inch range, but some locations in southern Maury, Lawrence, and Wayne have had more than 6 inches. Rainy conditions are expected to continue with a stream of deep moisture from the western Gulf coming up across the frontal zone. Showers will be most widespread across the northwest half ot he area through the day, although there will be a few breaks in the rain during the afternoon. The better chance for thunderstorms will be on the warm side of the front, over the southeast half. We had a few strong to marginally severe cells yesterday. Today, the strong storm potential looks lower with thicker cloud cover and less heating. If any strong storms occur today, the Plateau will be the main location with capes near 1000 J/kg at mid afternoon. Generally, we expect instability to contribute to enhanced heavy downpours. If any locations get hit multiple times by the heavy downpours, flash flooding could develop. Since the potential looks very localized, we do not need a Flash Flood Watch at this time. We have issued a Hydrologic Outlook with more details about the heavy rainfall potential through the next few days. Highs today will be in the 70s, except maybe a few lower 80s in the slightly less rainy southeast counties. && .AVIATION... 12Z TAF DISCUSSION. BNA/MQY/CKV/CSV...Surface boundary has moved south of Middle Tennessee this morning. However, an inverted 850 mb trough situated just to our northwest is providing the focus for ongoing precipitation. The heaviest and longest-lasting rain will occur to the north and west of Nashville. Eastern and southern portions of the mid state will experience less rain today and tonight and generally better ceilings owing to slightly less moisture. There is a small chance of thunderstorms with this system, but the chance is so low that the TAF's will only mention RA. Look for gradually improving ceilings later today and overnight all terminals. && .OHX WATCHES/WARNINGS/ADVISORIES... NONE. && DISCUSSION......13 AVIATION........08
Hazardous Weather Outlook National Weather Service Nashville TN 508 AM CDT Sun Sep 23 2018 TNZ005>011-023>034-056>066-075-077>080-093>095-241015- Stewart-Montgomery-Robertson-Sumner-Macon-Clay-Pickett-Houston- Humphreys-Dickson-Cheatham-Davidson-Wilson-Trousdale-Smith- Jackson-Putnam-Overton-Fentress-Perry-Hickman-Lewis-Williamson- Maury-Marshall-Rutherford-Cannon-De Kalb-White-Cumberland-Bedford- Coffee-Warren-Grundy-Van Buren-Wayne-Lawrence-Giles- 508 AM CDT Sun Sep 23 2018 This Hazardous Weather Outlook is for portions of Middle Tennessee. .DAY ONE...Today and Tonight Flash flooding may become an issue as some areas have already received 2 to 6 inches of rain since Friday. An additional 1 to 2 inches is possible today and tonight, and while there is low confidence on the exact location of the heaviest rain, training storms will increase the flooding risk. .DAYS TWO THROUGH SEVEN...Monday through Saturday The atmosphere is expected to become slightly more unstable on Monday and Tuesday. More widespread thunderstorms may occur, a few of which could become strong with gusty winds. The current wet period will last through Wednesday, and so the ongoing threat of flooding remains. Rainfall totals from Sunday through Wednesday are expected to range from more than 1 inch along the Cumberland Plateau to in excess of 4 inches around Clarksville, Waverly and Land-between-the-Lakes. .SPOTTER INFORMATION STATEMENT... Spotter activation may become necessary for rainfall measurements and flooding reports today through Wednesday.
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Spring Hill Police Department tweeted that Duplex Road was closed due to flooding where it was under construction between Cochran Trace Drive and Baker Springs Lane.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2018Every state in 2018This day in weather historyWarnings in Tennessee, September 2018
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 786750.