A cluster of thunderstorms associated with an upper level disturbance moved east through southern middle Tennessee during the pre-dawn hours. Wind damage associated with the thunderstorms was reported in Lincoln 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 HUN wrote it up.
A cluster of thunderstorms associated with an upper level disturbance moved east through southern middle Tennessee during the pre-dawn hours. Wind damage associated with the thunderstorms was reported in Lincoln 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 Huntsville, AL wrote its last area forecast discussion before the first event at Jun 23, 2:40 AM CST, 1 hour 32 minutes earlier.
Area Forecast Discussion National Weather Service Huntsville AL 340 AM CDT Tue Jun 23 2020 .NEAR TERM...(Today) Issued at 340 AM CDT Tue Jun 23 2020 Some moderate to heavy rainfall continues to push east ahead of a shortwave trough axis moving into western Tennessee. This feature has continued to slowly move east over the last few hours. As it continues to do so, a fairly large area of showers (some heavy) will affect locations near and east of the I-65 corridor. Instability is fairly meager (500 to 1000 J/KG) over northern Alabama and southern middle Tennessee. Cannot rule out a few rumbles of thunder with this activity as it pushes east. However, not expecting much thunderstorm activity through the early morning hours. Some rainfall amounts around one inch or slightly higher are possible through the early morning hours. Most guidance shows subsidence moving into the area behind the shortwave trough axis during the morning hours. Expect the shortwave to continue to move east and push into central or eastern Tennessee by the early afternoon hours. The airmass looks like it will be too worked over for more than isolated to scattered shower activity through the morning hours. Given some weak CAPE lingering over the area, cannot rule out an isolated thunderstorm in the morning, but they should be fairly weak. During the afternoon, there is quite a bit of uncertainty that significant additional disturbances (forcing) will move north through the area. At this point, only included 40 to 50 POP in the late afternoon, since better forcing looks to be further south. CAPE increases enough for maybe some stronger storms producing some gusty winds and heavier rainfall, but not much else. Morning cloud cover and precipitation will help to keep highs in the upper 70s to lower 80s. .SHORT TERM...(Tonight through Thursday) Issued at 340 AM CDT Tue Jun 23 2020 The upper low just north of the Great Lakes region will continue to move extremely slowly tonight through Wednesday afternoon. Additional disturbances will continue to move across southern/central Alabama through that timeframe ahead of the quasi-stationary front. The end result will be isolated to scattered shower and thunderstorms Tuesday night. Some fog development is expected with light winds in the forecast. Shower and thunderstorm coverage looks like it will increase on Wednesday. This is mainly due to stronger forcing edging into the area from the south. Again, could see some strong storms producing gusty winds and heavy rainfall. Overall though precipitation amounts don't look very impressive. Slightly cooler temperatures are expected on Wednesday. Some drier air should move into the area on Wednesday night, as the front associated with the upper low finally kicks east in earnest. Lows in the mid 60s look possible. .LONG TERM...(Thursday night through Monday) Issued at 340 AM CDT Tue Jun 23 2020 The extended period will become a bit more summerlike, although pattern resolution early next week becomes quite uncertain with a large variance in the models. More specifically, on Friday, a ridge position at 5h will be in place from the eastern Gulf through the lower OH Valley. A weakness or trough will be located across the southern Plains, with southerly flow and shortwaves ahead of this trough across the western Gulf into the central and western Gulf Coast. The Canadian and to a lessor extent ECMWF are more bullish with a more defined MCV/Low. In any event, these waves (or the MCV) will likely combine with diurnal heating to produce clusters of convection across the Gulf South region and perhaps as far north as the mid South region mainly to our west and south. For Sunday and Monday, model differences are significant, making for an uncertain forecast. The GFS keeps a train of waves moving into the region and a northwest flow pattern from the upper Midwest through the OH and TN valleys. Meanwhile the ECMWF builds an amplified upper ridge from the Gulf north through the Southeast and eastern Great Lakes. The Canadian is somewhat in between the GFS and ECWMF, and has a ridge relegated over the Gulf into the Deep South. Suggested blends will mainly diurnally driven PoPs each day nonetheless, and will stick close to this for now. Temps will run close to normal through the period with highs in the u80s-a90 and lows in the u60s-l70s. && .AVIATION...(For the 06Z TAFS through 06Z Tuesday night) Issued at 1117 PM CDT Mon Jun 22 2020 An area of showers and embedded thunderstorms over NE MS/NW AL border will move across the area overnight. This is producing MVFR to IFR CIGS and VSBYS over the KMSL terminal at times. This should continue to be the case through 10Z, before activity should become more scattered in nature around 15Z. Similar conditions are expected at KHSV, but should begin bit later, mainly between 8Z and 12Z before MVFR and VCSH become predominant there too. Expect CIGs to improve and become VFR at 8Z at both terminals. Might have to add some -TSRA or -SHRA in the evening, but for now leaving out. && .HUN WATCHES/WARNINGS/ADVISORIES... AL...NONE. TN...NONE. && NEAR TERM...KTW SHORT TERM...KTW LONG TERM...17 AVIATION...RSB For more information please visit our website at weather.gov/huntsville.
Hazardous Weather Outlook National Weather Service Huntsville AL 348 AM CDT Tue Jun 23 2020 ALZ001>010-016-TNZ076-096-097-232330- Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan- Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN- 348 AM CDT Tue Jun 23 2020 This Hazardous Weather Outlook is for north Alabama and portions of southern middle Tennessee. .DAY ONE...Today and Tonight... Numerous showers with a few embedded thunderstorms are expected early this morning. Locally heavy downpours may reduce visibility and produce brief ponding of water on area roads. There is a chance of additional showers and perhaps a few thunderstorms this afternoon and evening, with the greatest chance south of the Tennessee River. Lightning, gusty winds and heavy downpours will be the main hazards from these thunderstorms. .DAYS TWO THROUGH SEVEN...Wednesday through Monday... Additional showers and scattered thunderstorms are expected to continue along a stalled frontal boundary near northern Alabama on Wednesday. The greatest chance will be south of the Tennessee River. Chances of thunderstorms exist each day from Thursday through Monday, mainly during the afternoon hours. Lightning, gusty winds and heavy downpours will be the main hazards from these thunderstorms. .SPOTTER INFORMATION STATEMENT... Activation of storm spotters and emergency management personnel is not anticipated at this time.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
132 AM CDT TUE JUN 23 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0440 PM TSTM WND DMG 1 ENE MUSCLE SHOALS 34.75N 87.63W
06/22/2020 COLBERT AL PUBLIC
A TREE WAS KNOCKED DOWN ONTO A HOME DAMAGING
THE ROOF.
&&The national radar mosaic for the moment the first event began.
1 thunderstorm wind. Local standard time, as filed.
Two large trees were knocked down off of Limestone Road in the Elora community. Minor roof damage was also reported at a residential home. Time was estimated by radar.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2020Every state in 2020This day in weather historyWarnings in Tennessee, June 2020
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: 902028.