A late afternoon thunderstorm produced winds that knocked a tree down in Lauderdale 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 late afternoon thunderstorm produced winds that knocked a tree down in Lauderdale 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 18, 2:06 PM CST, 1 hour 54 minutes earlier.
Area Forecast Discussion National Weather Service Huntsville AL 306 PM CDT Sun Jun 18 2017 .NEAR TERM...(Tonight) Issued at 306 PM CDT Sun Jun 18 2017 Afternoon GOES-16 visible imagery shows a rather chaotic scene across the region. Showers and thunderstorms that erupted on an outflow and stationary disturbance from the Mississippi Valley convection have now dissipated, leaving a pronounced outflow boundary and clearing in its wake. This is creating quite a range of temperatures--and thus instability--across the area, ranging from rain-cooled conditions at Vinemont/Cullman and Decatur, to some places that have been in the sun all day like Muscle Shoals. Meanwhile, an MCS continues a slow march to the SSE across the Nashville metro area, another MCS over Arkansas is moving east into the Memphis metro area, and additional scattered showers and thunderstorms are developing across northern Mississippi. The parent cold front responsible for these storms is located roughly from Paducah to Little Rock, while the driving shortwave is over northern Illinois. One way or another, showers and thunderstorms are expected tonight across most of southern Tennessee and north Alabama, as the front slowly inches SE. One of the ongoing storm complexes seems likely to be the first culprit with additional storms to follow overnight. Ensembles pinpoint the highest rain chances to come after 06Z. The forecast will stick with persistence for low temperatures tonight. There is still some uncertainty about storm severity. Rain and clouds were seeming to limit the instability, but with clearing occurring, that is becoming less and less of an issue. Mesoanalysis and model data suggest there may be less DCAPE available to enhance downdrafts, but that will not be enough to zero out the straight line wind threat. Ongoing wording about strong to severe storms still looks reasonable. .SHORT TERM...(Monday through Tuesday) Issued at 306 PM CDT Sun Jun 18 2017 The short term will be dominated by the effects of convection along the front, which has slowed down further with today's model runs and is now expected to move across the area by perhaps 00Z Tuesday. So high PoPs will need to linger across most of Monday and well into Monday night before dry air even considers moving into the area--and that is not very certain either. Heavy rainfall still could be a marginal threat, and some localized flooding cannot be ruled out given the precipitable water values expected to approach 2 inches. However, the recent dry spell across the area (June month-to-date rainfall is less than half of normal at HSV and only 0.38 at MSL) has depleted soil moisture; in fact, NASA SPoRT Land Info System soil moisture data is running in the 10th to 30th percentiles across a good chunk of the area. So it seems like we can probably handle the expected 1-2 inches of rain that models are spitting out. For now we will hold off on a flash flood watch. The drying trend currently forecast for Tuesday could be in jeopardy pending the track of the much-discussed tropical system over the Caribbean. 12Z model guidance has come into better agreement on the track of the system, which brings it into the eastern Gulf early Tuesday. That could affect the southward extent of the cold front and thus our rain chances through the short term, let alone what it does for the remainder of the week. In this kind of pattern, it is hard to deviate much from blended guidance. High temperatures tomorrow will run about 5 degrees below normal (which may be somewhat optimistic given clouds and rain) while post-frontal highs Tuesday could easily rise back to normal. Low temperatures should cool off slightly Monday night and Tuesday night but this assumes dry air advection that may lag. .LONG TERM...(Tuesday night through Saturday) Issued at 306 PM CDT Sun Jun 18 2017 New model guidance is showing a weak and dry re-enforcing longwave trough axis merging with the stalled out frontal boundary in southern Alabama on Wednesday. NAM12 is the main outlier and keeps the frontal boundary further north closer to central Alabama. However, even the NAM12 soundings look too dry for precipitation development(so left out pop at this time on Wednesday). Cloud cover does look to increase on Wednesday in the afternoon from the south. However, much of the morning should be cloud free based on forecast RH fields. 925 mb temperatures are still forecast to be between 22 and 25 degrees Celsius north of the Tennessee River. Lower 90s north of the river to mid/upper 80s south of the River look reasonable based on expected cloud cover. A weakness in the ridge continues to remain in place just south of the area due to the revitalization of energy aloft with the re-enforcing longwave trough axis. This keeps a west to east oriented area of shear/vorticity associated with this longwave trough over southern Georgia/Alabama on Wednesday night. Increasing southerly flow from the Gulf of Mexico should help to moisture the atmosphere Wednesday night into Thursday. This should advect higher dewpoints in the mid to upper 60s into the area and allow warmer low temperatures(in the mid to upper 60s) to return. The models are in fairly good agreement that this boundary will move north Wednesday night into Thursday morning toward the Tennessee Valley. Models do forecast deep enough moisture and forcing with this boundary pushing into northern Alabama on Thursday independent of the tropical entity's path for scattered shower and thunderstorm develop. Some of these could be strong producing gusty winds and heavy downpours. The movement of the tropical entity in the Gulf of Mexico continues to diverge significantly in new model guidance. NAM12/ECMWF continue to be much further west with this feature and move it into southern Texas. GFS moves it more north and into the Mississippi/Lousiana coast. However, by Thursday into Thursday night, most synoptic models advect such rich moisture north from the Gulf of Mexico, that the boundary moving north from central Alabama has plenty of instability (2000-3000 J/KG) and high moisture content (PWATS climbing to over 2.00 inches at times) to work with. At this point, bulk shear is dependent on where the tropical system moves. If the tropical entity moves into central Alabama, this could provide the impetus for strong to marginally severe storms (given a stronger low level wind field and stronger shear) in some portion of northern Alabama. Regardless, new guidance is suggesting this could produce some heavy rainfall and strong storms producing gusty winds over the area Thursday night through Friday. Will need to monitor this as we get closer. Chances of showers/storms were kept a bit below guidance, but still between 50 and 60 percent during that time. Kept these higher chances of showers/storms in the forecast through Friday, as the boundary (maybe enhanced by the tropical system) moves across northern Alabama. As the better forcing/shear continues to move northeast Friday night into Saturday into Goergia/eastern Tennessee), shower and thunderstorm chances will lessen. However, kept scattered activity in the forecast given some upper level energy remaining over the area. Depending on how much rainfall we actually receive Thursday night and Friday, minor flash flooding/river flooding may become a concern. This really doesn't change much through the upcoming weekend as scattered showers and storms remain in the forecast. && .AVIATION...(For the 18Z TAFS through 18Z Monday afternoon) Issued at 1248 PM CDT Sun Jun 18 2017 Extremely difficult pattern to forecast thru 18Z/19 due to occasional scattered showers/storms stemming from a weak front currently over the Mississippi and Ohio Valleys. Scattered storms ongoing now will become more numerous this afternoon. There is some confidence in timing though it may extend later than TEMPO groups indicate. Once we get past 00Z, the thunderstorm threat is nearly impossible to time as the front slowly moves east (it will not pass either site until after 18Z/19). For these TAFs, have forecast prevailing MVFR conditions within SHRA beyond 04Z, with ceilings lowering after daybreak. Thunderstorms and IFR conditions are highly likely to occur after 04Z, but timing is just too uncertain to include further details at this time. && .HUN WATCHES/WARNINGS/ADVISORIES... AL...NONE. TN...NONE. && NEAR TERM...BCC SHORT TERM...BCC LONG TERM...KTW AVIATION...BCC For more information please visit our website at weather.gov/huntsville.
Hazardous Weather Outlook National Weather Service Huntsville AL 313 PM CDT Sun Jun 18 2017 ALZ001>010-016-TNZ076-096-097-191200- Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan- Marshall-Jackson-De Kalb-Cullman-Moore-Lincoln-Franklin TN- 313 PM CDT Sun Jun 18 2017 This Hazardous Weather Outlook is for north Alabama and portions of southern middle Tennessee. .DAY ONE...Tonight... Thunderstorm coverage will increase as the evening progresses with numerous thunderstorms expected overnight. The highest threat of any strong to marginally severe thunderstorms will be this evening with wind gusts up to 60 mph possible. Brief heavy rainfall could also lead to localized flooding. .DAYS TWO THROUGH SEVEN...Monday through Saturday... Thunderstorm coverage will taper off Monday night with isolated thunderstorms lingering in the southeast portions of the area Tuesday into Tuesday night. Brief heavy rainfall any of these storms may lead to localized flooding. Scattered thunderstorms return to the area Thursday through Saturday with slightly higher coverage expected on Friday. .SPOTTER CALL TO ACTION STATEMENT... Activation of storm spotters and emergency management personnel is not anticipated at this time.
The Columbus AFB radar (KGWX), 118 km away, was scanning. The volume nearest the first event began at 22:01 UTC.
1 thunderstorm wind. Local standard time, as filed.
A tree was knocked down on the roadway at the intersection of CR 189 and CR 6.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Alabama in 2017Every state in 2017This day in weather historyWarnings in Alabama, June 2017
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: 694022.