Afternoon thunderstorms produced isolated wind damage. The heaviest damage occurred in Decatur with one storm which knocked down several trees damaging homes.
Every event with a place to put it. Tap one for its entry below.
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.
Afternoon thunderstorms produced isolated wind damage. The heaviest damage occurred in Decatur with one storm which knocked down several trees damaging homes.
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 Aug 6, 11:24 AM CST, 1 hour 41 minutes earlier.
Area Forecast Discussion National Weather Service Huntsville AL 1224 PM CDT Mon Aug 6 2018 .UPDATE... For 18Z TAFS. && .NEAR TERM...(Rest of Today) Issued at 854 AM CDT Mon Aug 6 2018 A quiet morning across the Tennessee Valley, with high pressure at the surface remaining firmly entrenched across Alabama. Subsidence from this ridge has helped to maintain a dry forecast across the area overnight, with only some river valley fog forming (that has now diminished). The result will be a mostly sunny morning, which will allow for good heating and temperatures to quickly rise from the upper 70s into the lower 90s by 16-17z. Guidance has underdone the effect of heating and subsidence of the ridge the last 2-3 days -- thus, underestimating high temperatures. Yesterday, readings of 98 and 96 were recorded at KMSL and KHSV respectfully. Based on the current set-up and how dry it's been of late, would not be surprised to see either site reach these values again -- or at least come very close. In fact, if either site can stay rain-free, it may be the hottest day of the summer to date, potentially. Regardless, readings in the low to mid 90s are expected across the region. With dewpoints hovering around 70 degrees, heat index values will likely peak in the 100 to 104 degree range this afternoon, with a few sites possibly reaching heat advisory criteria. We'll have to watch obs/trends in the coming hours closely. There is still moisture underneath the aforementioned ridge, so am expecting (if nothing else) a scattered to broken cumulus field to develop again by 16-17z. Interestingly, a weakness in the ridge was noted over the Ozarks in Arkansas (where weak upper-low can be seen on water vapor satellite). Any impacts from this feature should stay displaced to the northwest of the area. Thus, subsidence will win out by and large over the Tennessee Valley. Still, enough moisture and instability will exist to warrant a mention of isolated afternoon thunderstorms, despite the weak wind shear and lack of forcing. This activity should be weak and short-lived within a narrow window from mid afternoon to early evening. .SHORT TERM...(Tonight through Wednesday night) Issued at 355 AM CDT Mon Aug 6 2018 A system moving over the western CONUS will help induce troughing over the east/central portion of the lower-48 during the course of the work week. This troughing and the approach of frontal boundary from the NNW will bring gradually higher chances for showers and thunderstorms across the area, especially by the midweek. The GFS looked too wet for much of the period, leaned toward an in-between that solution and the drier NAM. Given the approach of the front and better moisture convergence, stayed with likely rain chances for much of the area for Wednesday. Did not go likely all areas, given the majority of the showers should be closer to the main boundary. With more clouds and higher rain chances, cooled high temperatures down a tad on Tuesday into the lower 90s. Mid/upper 80s looked appropriate for the midweek with scattered to widespread showers and thunderstorms. .LONG TERM...(Thursday through Sunday) Issued at 355 AM CDT Mon Aug 6 2018 An unsettled weather pattern will provide slightly cooler than normal daytime highs through the extended. As a sfc low in the OH Valley lifts NE, it will pull a cold front towards the TN Valley. The boundary weakens before stalling out across the area on Thursday bringing showers and thunderstorms. Southwesterly winds will bring additional moisture to the region, with local PWATS just shy of 2" by Thursday. Combined with the boundary and daytime heating, scattered to numerous showers are possible especially during the afternoon hours. Coverage will wane with the lost of daytime heating, however with the boundary in place and a shortwave encroaching, a scattered chance will remain in during the overnight hours. When exactly the shortwave moves into the TN Valley or its strength will depend on the model you choose. Ahead of the approaching shortwave southwesterly winds will increase, allowing PWATS to reach 2" (75th percentile). The GFS is the faster solution, pulling the shortwave through on Friday. With the boundary still in place, numerous showers/storms are once again possible. The ECMWF on the other hand is much slower, not pushing the shortwave through until Sunday. Models are in good agreement about a trough developing across the Great Lakes on Saturday keeping a southwesterly flow in place. However, the latest run of the ECMWF no longer develops it into a closed low but a faster, more elongated positive trough. This leads the ECMWF into having a much wetter solution for Sunday compared to the GFS that already has the boundary out of here and the shortwave NE of the area. Went a littler lower than guidance on Saturday and kept close to guidance on Sunday for the POPs due to this big discrepancy. Thus scattered storms are possible through the weekend with chances really decreasing heading into Sunday night due to drier air filtering in. The increase in cloud cover and convection through the weekend will keep daytime highs a tad below normal in the mid/upper 80. On the flip side it will keep overnight lows steady around 70 degrees which is seasonable. && .AVIATION...(For the 18Z TAFS through 18Z Tuesday afternoon) Issued at 1224 PM CDT Mon Aug 6 2018 VFR conditions will be the predominant flight category at each terminal through the period. However, some isolated to widely scattered -SHRA may clip KHSV over the next 4 hours, prompting a mention of this in a TEMPO. Any convection will diminish by early evening and another dry and quiet night is expected. && .HUN WATCHES/WARNINGS/ADVISORIES... AL...NONE. TN...NONE. && NEAR TERM...AMP.24 SHORT TERM...RSB LONG TERM...JMS AVIATION...AMP.24 For more information please visit our website at weather.gov/huntsville.
Hazardous Weather Outlook National Weather Service Huntsville AL 425 AM CDT Mon Aug 6 2018 ALZ001>010-016-TNZ076-096-097-070030- Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan- Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN- 425 AM CDT Mon Aug 6 2018 This Hazardous Weather Outlook is for north Alabama and portions of southern middle Tennessee. .DAY ONE...Today and Tonight... Isolated to scattered thunderstorms are in the forecast across the Tennessee Valley, mainly this afternoon. The better chances of storms will be across portions of southern middle Tennessee. Afternoon heat index values will range from 100 to 104 degrees, or just shy of Heat Advisory threshold. Those with outdoor activities should take precautions to alleviate heat related ailments. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday... The approach of a cold front from the north will bring scattered to numerous storms, especially from Wednesday through Sunday. Locally heavy rainfall and gusty winds will be the main hazards with the stronger storms during this period. .SPOTTER CALL TO ACTION STATEMENT... Activation of storm spotters and emergency management personnel is not anticipated at this time.
Special Weather Statement National Weather Service Huntsville AL 1230 PM CDT MON AUG 6 2018 ALZ005-006-061815- Madison AL-Limestone AL- 1230 PM CDT MON AUG 6 2018 ...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL MADISON AND NORTHEASTERN LIMESTONE COUNTIES UNTIL 115 PM CDT... At 1229 PM CDT, Doppler radar was tracking a strong thunderstorm near Harvest, or near Athens. This storm was nearly stationary. Pea size hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Northern Huntsville, Athens, Harvest, Capshaw and French Mill. PRECAUTIONARY/PREPAREDNESS ACTIONS... Frequent cloud to ground lightning is occurring with this storm. Lightning can strike several miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 3473 8689 3479 8695 3496 8685 3482 8663 TIME...MOT...LOC 1729Z 223DEG 2KT 3481 8685 KTW
The Northeast Alabama radar (KHTX), 28 km away, was scanning. The volume nearest the first event began at 19:05 UTC.
11 thunderstorm wind, 1 hail. Local standard time, as filed.
Trees were uprooted on North Houston Street in Scottsboro. This caused damage and a power outage.
A tree was knocked down on a home.
A tree was knocked down into the intersection of Jackson Street SE and 8th Avenue SE.
A tree was knocked down on the road at the intersection of 7th Avenue W and 1st Street SW.
A tree was knocked down onto a home on Vine Street.
A very large and tall tree was uprooted and knocked down onto a home on Cain Street N.E. Trees were also knocked down on Line Street and Vine Street. Also, about 700 utility customers were without power due to the storm.
Nickel sized hail was reported.
A large tree was knocked down at the corner of Grant and Church Street.
Trees were knocked down along CR 11 southwest of Vina.
A tree was knocked down on Barker Road.
A tree was knocked down on Airfield Street.
A tree was knocked down on Houston Street.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Alabama in 2018Every state in 2018This day in weather historyWarnings in Alabama, August 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: 768943, 763700, 763701, 763702, 763703, 763711, 763699, 763704, 763705, 763706, 763708, 763709.