Scattered to numerous thunderstorms developed during the late morning into the afternoon hours. These thunderstorms exhibited mini-supercellular traits at times with a couple of wall clouds and photos of meso-cyclones submitted to the National Weather Service.
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.
Scattered to numerous thunderstorms developed during the late morning into the afternoon hours. These thunderstorms exhibited mini-supercellular traits at times with a couple of wall clouds and photos of meso-cyclones submitted to the National Weather Service. A few of the thunderstorms produced wind damage.
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 Jul 6, 8:47 AM CST, 2 hours 1 minute earlier.
Area Forecast Discussion National Weather Service Huntsville AL 947 AM CDT Thu Jul 6 2017 .NEAR TERM...(Rest of Today) Issued at 947 AM CDT Thu Jul 6 2017 Another active day expected across the southern Tennessee Valley and Southern Appalachian region -- with multiple rounds of showers and thunderstorms expected. This morning's activity seems to be tied to a weak upper-level shortwave that has rotated around the base of a slow-moving trough to the west. The result has been some higher 0-1/0-3 km shear values in the 25-30 kt range across Northern Alabama and Tennessee, which has helped to somewhat organize and sustain this early day activity. With ML-CAPEs around 1000 J/kg, cannot rule out some scattered strong/SPS-type storms capable of 40-50 mph winds and, of course, heavy rainfall through midday. With good clearing taking place across most of the Valley, am expecting the atmosphere to quick destabilize further as was the case yesterday. The latest runs of the HRRR have done a reasonably good job of resolving this activity early/mid morning and do show scattered to perhaps numerous showers/storms developing again very quickly around 17z when the CAP fully breaks. Given the sunshine we've seen earlier this morning, a moderately unstable air mass should develop by early afternoon (perhaps better than yesterday). ML-CAPE values may approach 2000-2500 J/kg and with a little shear to work with (15-25 kts), some semi-organized multicell clusters and/or pulse cells are possible. As was this case yesterday, this will be very tied to heating and mesoscale boundaries. We will especially need to watch storms as they interact with these boundaries. Any of this activity will be capable of producing frequent lightning and gusty winds up to 50 mph -- with a few potentially exceeding severe limits. The threat was damaging winds from outflow and wet microbursts will be a factor throughout the afternoon and evening. Speaking of water, we will also need to watch for any training of multi-cells and storms as they will be very efficient rainfall producers. Localized flash flooding is possible today with this activity (despite a 25-30 kt storm motion), given all the rainfall that has occurred in recent days and weeks. .SHORT TERM...(Tonight through Saturday) Issued at 252 AM CDT Thu Jul 6 2017 Showers and thunderstorms will linger into the evening hours, as the upper trough continues to move slowly east. Meanwhile, a weak frontal boundary will move through the forecast area and stall just to our south prior to sunrise on Friday. The coverage of storms will decrease through the overnight hours, with the loss of daytime heating and weak nature of the lift. Skies will generally remain cloudy, keeping temperatures in the lower 70s and also preventing widespread fog development. Isolated to scattered storms are possible again on Friday, mainly across the southeast closer to the stalled boundary. Storms will diminish through the day, especially across the northwest as the trough axis moves east of the area. Friday night looks to be mostly dry, though lingering cloud cover and low level moisture will keep temperatures in the lower 70s once again. The axis of the upper level trough will be over the east coast on Saturday, a weak vort max is expected to move around its western periphery. Meanwhile, at the surface, a second cold front will extend from the parent low over New England and southwestward into TN. This front will move into the TN Valley during the day Saturday, with scattered showers and thunderstorms possible for much of the day. Storm coverage will decrease during the overnight hours on Saturday night, with the loss of daytime heating. Temperatures through the short term will be dependent on where and when thunderstorms develop. Due to this uncertainty, kept close to blended guidance with highs in the upper 80s to lower 90s. Temperatures on Saturday night will be somewhat "cool" as skies begin to clear and drier air filters into the area. .LONG TERM...(Saturday night through Wednesday) Issued at 252 AM CDT Thu Jul 6 2017 Guidance differs on much of the long term period, with the GFS keeping northerly flow across the area on Sunday and Monday and the ECMWF maintaining weak southerly flow. If the GFS verifies, much drier air will be in place on Sunday and PW values drop below 1 inch. This would keep much of the area rain free, with little to no lifting mechanism and virtually no moisture to work with. However, as the ECMWF keeps the moisture, will maintain isolated thunderstorms in the forecast. Both models do show southerly flow late Monday, with moisture increasing through the remainder of the extended. An upper ridge will build over the Central Plains but may struggle to build eastward and into the TN Valley. So, with little to no subsidence and given the available moisture, afternoon showers and thunderstorms will remain possible through the remainder of the extended. && .AVIATION...(For the 12Z TAFS through 12Z Friday morning) Issued at 617 AM CDT Thu Jul 6 2017 Showers and thunderstorms west of KHSV may impact the terminal during the next hour or so. However, based on latest radar trends, activity has been weakening and may not reach the terminal before it dissipates. Given some uncertainty, will include a tempo group for the first 2 hours of the forecast period. Along with low clouds ~1500 feet, heavy rainfall is possible, which may reduce visibilities occasionally through 14Z. Additional showers and thunderstorms across are expected to develop and push into the KMSL and KHSV terminals after 15Z. Therefore, have VCTS in the forecast from 15Z through 22Z at both terminals, given low confidence on exact timing of storms. Outside of any thunderstorms that develop, VFR conditions will prevail through much of the period. Low clouds are expected to move into the terminals after 06Z. KMSL observations are not being transmitted and therefore amendments are not scheduled. && .HUN WATCHES/WARNINGS/ADVISORIES... AL...NONE. TN...NONE. && NEAR TERM...AMP.24 SHORT TERM...73 LONG TERM...73 AVIATION...73 For more information please visit our website at weather.gov/huntsville.
Hazardous Weather Outlook...UPDATED National Weather Service Huntsville AL 1050 AM CDT Thu Jul 6 2017 ALZ001>010-016-TNZ076-096-097-070700- Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan- Marshall-Jackson-De Kalb-Cullman-Moore-Lincoln-Franklin TN- 1050 AM CDT Thu Jul 6 2017 This Hazardous Weather Outlook is for north Alabama and portions of southern middle Tennessee. .DAY ONE...This Afternoon and Tonight... Scattered to numerous showers and thunderstorms are expected today, ahead of a weak front. A few strong to marginally severe storms may produce gusty winds to around 50 to 60 mph and heavy rainfall leading to isolated instances of flash flooding. Additionally, frequent lightning will be a threat with all storms. .DAYS TWO THROUGH SEVEN...Friday through Wednesday... Isolated to scattered thunderstorms will continue on Friday, as the front stalls to our south. A second front will move into the region on Saturday, with scattered thunderstorms possible once again. A few storms may become strong, with gusty winds and heavy rainfall the main threats. Isolated thunderstorms will remain in the forecast Sunday through Wednesday. .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
953 AM CDT THU JUL 6 2017
ALZ006-009-TNZ076-096-097-061545-
Madison AL-Jackson AL-Franklin TN-Moore TN-Lincoln TN-
953 AM CDT THU JUL 6 2017
...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN JACKSON...NORTHEASTERN
MADISON...MOORE...SOUTHEASTERN LINCOLN AND FRANKLIN COUNTIES UNTIL
1045 AM CDT...
At 952 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Tullahoma to near Tims Ford Lake to near
New Market. Movement was east at 40 mph.
Wind gusts up to 50 mph will be possible with these storms.
Locations impacted include...
Winchester, Bridgeport, Lynchburg, Hazel Green, Decherd, Estill
Springs, Cowan, Monteagle, Huntland and Tims Ford Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike several away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3541 8625 3539 8628 3538 8625 3537 8627
3534 8624 3535 8622 3533 8620 3536 8616
3534 8603 3531 8600 3532 8598 3528 8591
3522 8586 3499 8586 3498 8563 3491 8566
3493 8661 3535 8638 3536 8633 3541 8628
TIME...MOT...LOC 1452Z 264DEG 35KT 3533 8615 3517 8628 3496 8648
AMPSpecial Weather Statement National Weather Service Huntsville AL 1038 AM CDT THU JUL 6 2017 ALZ006-009-TNZ097-061615- Madison AL-Jackson AL-Franklin TN- 1038 AM CDT THU JUL 6 2017 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN JACKSON... NORTHEASTERN MADISON AND SOUTHEASTERN FRANKLIN COUNTIES UNTIL 1115 AM CDT... At 1038 AM CDT, Doppler radar was tracking a strong thunderstorm 7 miles southeast of New Market, moving east at 25 mph. Pea size hail and wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Skyline, Gurley, New Market, Hytop, Jericho, Larkin, Bass, Maysville, Princeton and Estillfork. PRECAUTIONARY/PREPAREDNESS ACTIONS... Strong gusty winds will be capable of knocking down small tree limbs along with other small unsecured items. Seek safe shelter until this storm has passed. 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 3472 8642 3492 8646 3508 8593 3478 8584 TIME...MOT...LOC 1538Z 259DEG 21KT 3485 8631 AMP
Special Weather Statement
National Weather Service Huntsville AL
1113 AM CDT THU JUL 6 2017
ALZ009-TNZ097-061645-
Jackson AL-Franklin TN-
1113 AM CDT THU JUL 6 2017
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN JACKSON AND
SOUTHEASTERN FRANKLIN COUNTIES UNTIL 1145 AM CDT...
At 1112 AM CDT, Doppler radar was tracking a strong thunderstorm 7
miles north of Stevenson, or 7 miles west of Bridgeport, moving east
at 40 mph.
Dime size hail and wind gusts up to 50 mph will be possible with
this storm.
Locations impacted include...
Bridgeport, South Pittsburg, Anderson, Orme, Bass, Long Island,
Russell Cave National Monument and New Hope.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Strong gusty winds will be capable of knocking down small tree limbs
along with other small unsecured items. Seek safe shelter until this
storm has passed.
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 3489 8594 3505 8599 3509 8586 3499 8586
3499 8561 3498 8560 3492 8559
TIME...MOT...LOC 1612Z 258DEG 35KT 3497 8585
AMPSpecial Weather Statement
National Weather Service Huntsville AL
1118 AM CDT THU JUL 6 2017
ALZ006>008-061645-
Marshall AL-Madison AL-Morgan AL-
1118 AM CDT THU JUL 6 2017
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN MARSHALL...
SOUTHWESTERN MADISON AND EAST CENTRAL MORGAN COUNTIES UNTIL 1145 AM
CDT...
At 1117 AM CDT, Doppler radar was tracking a strong thunderstorm
near Somerville, moving east at 20 mph.
Pea size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Southern Huntsville, Redstone Arsenal, Owens Cross Roads, Triana,
Morgan City, Somerville, Valhermoso Springs, Whitesburg, Hampton Cove
and Laceys Spring.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Very heavy rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3439 8677 3455 8682 3455 8679 3457 8679
3469 8646 3443 8636
TIME...MOT...LOC 1617Z 254DEG 19KT 3450 8671
JMSSpecial Weather Statement
National Weather Service Huntsville AL
1137 AM CDT THU JUL 6 2017
ALZ008>010-061715-
Marshall AL-De Kalb AL-Jackson AL-
1137 AM CDT THU JUL 6 2017
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN JACKSON...
NORTHEASTERN MARSHALL AND SOUTHERN DEKALB COUNTIES UNTIL 1215 PM
CDT...
At 1136 AM CDT, Doppler radar was tracking a strong cluster of
thunderstorms near Geraldine, or 10 miles southwest of Rainsville,
moving east at 25 mph.
Pea size hail and winds in excess of 40 mph will be possible with
these storms.
Locations impacted include...
Fort Payne, Guntersville, Rainsville, Little River Canyon National
Preserve, Henagar, Sylvania, Fyffe, Powell, Geraldine and Section.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Very heavy rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike several miles away from a thunderstorm. Seek a
safe shelter inside a building or vehicle.
&&
LAT...LON 3437 8563 3436 8566 3432 8570 3429 8631
3443 8635 3471 8571 3441 8561
TIME...MOT...LOC 1636Z 257DEG 20KT 3443 8602
JMSSpecial Weather Statement
National Weather Service Huntsville AL
1146 AM CDT THU JUL 6 2017
ALZ009-TNZ097-061715-
Jackson AL-Franklin TN-
1146 AM CDT THU JUL 6 2017
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN JACKSON AND SOUTH
CENTRAL FRANKLIN COUNTIES UNTIL 1215 PM CDT...
At 1146 AM CDT, Doppler radar was tracking a strong thunderstorm 8
miles northwest of Skyline, or 15 miles east of Moores Mill, moving
east at 20 mph.
Pea size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Skyline, Hytop, Princeton, Jericho, Estillfork, Larkin and Hollytree.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Strong gusty winds will be capable of knocking down small tree limbs
along with other small unsecured items. Seek safe shelter until this
storm has passed.
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 3482 8590 3480 8628 3491 8632 3491 8631
3492 8631 3494 8628 3493 8627 3493 8626
3495 8627 3509 8600
TIME...MOT...LOC 1646Z 255DEG 19KT 3487 8625
AMPThe Northeast Alabama radar (KHTX), 56 km away, was scanning. The volume nearest the first event began at 16:45 UTC.
7 thunderstorm wind. Local standard time, as filed.
Several trees were knocked down along Highway 75 from Fyffe to Rainsville.
A few trees and power lines were knocked down between Fort Payne and Fyffe along Highway 75 and CR 866.
Multiple trees were knocked down near the intersection of CR 255 and CR 256 between Fort Payne and Adamsburg.
A tree was knocked down blocking the road at the 2000 block of CR 216.
Trees were knocked down onto CR 3.
Trees were knocked down onto CR 287 near AL Highway 117. Also, one oak tree was uprooted and fell onto a house. Time estimated by radar.
A tree was knocked down across AL Highway 277 off of U.S. Highway 72. Time estimed by radar.
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, July 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: 714293, 714294, 714295, 714296, 714297, 714298, 714300.