Scattered afternoon thunderstorms developed in a typical summer environment with a few becoming marginally severe with impacts to trees and power lines.
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 TAE wrote it up.
Scattered afternoon thunderstorms developed in a typical summer environment with a few becoming marginally severe with impacts to trees and power lines.
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 Tallahassee, FL wrote its last area forecast discussion before the first event at Jul 21, 1:29 PM CST, 1 hour 27 minutes earlier.
Area Forecast Discussion National Weather Service Tallahassee FL 329 PM EDT Fri Jul 21 2017 .NEAR TERM [Through Tonight]... Vapor imagery reveals a weak upper low moving across the marine area this morning and this will provide at least some assistance to developing thunderstorms this afternoon. The KTAE sounding is much more unstable than 24 hours ago. Lapse rates above 850 mb are a little steeper with the 850-500 mb layer at 6.6C/km. A modified surface parcel of 95/73 yields around 2800 J/kg of SBCAPE. Additionally the airmass has moistened a little from yesterday morning with the PWAT up to 1.82 in. While the 1000-700 mb flow is still fairly light, the easterly flow will provide for increased convergence along the Florida Panhandle sea breeze. Given that a little more convection is expected today, especially across the western half of the region, will show temperatures in the low to mid 90s in the western portion of the region, but in the mid 90s in the eastern half of the region. Heat indicies will peak near 105 degrees or so. Showers and thunderstorms will diminish right around sunset, and are expected to redevelop over the northern Gulf after midnight. Overnight lows will dip in the lower to middle 70s. .SHORT TERM [Saturday Through Sunday Night]... As a shortwave moves through the Great Lakes region, the eastern CONUS trough will gradually amplify into the Tennessee Valley and the Mid-Atlantic. At the surface, westerly flow over the Appalachians will result in lee troughing into the Southeast. Locally, however, it appears as though these features won't have much of an effect. Instead afternoon convection will continue to be driven by the seabreeze fronts. PoPs will be near normal (in the 40-60% range) for the southwesterly steering flow regime. Highs are forecast to be in the lower 90s with heat indices in the upper 90s to near 100 degrees. .LONG TERM [Monday Through Friday]... The aforementioned upper-level and surface troughs will be at their closest point to the region on Monday and will mix with the Gulf seabreeze fronts to result in slightly above average PoPs. Thereafter, the trough will lift northeast with ridging taking over once again. PoPs should be near normal during the week, forced by the Gulf and Atlantic seabreeze fronts. High will continue to remain in the lower to middle 90s each day. && .AVIATION [Through 18Z Saturday]... SCT TSRA will continue to develop across the region this afternoon mainly affecting the ECP/TLH terminals, though by 20z, all sites potentially could see a TSRA. Storms should dissipate after 00z Sat. A brief period of MVFR vsbys are possible at VLD around 10z ending after sunrise. Thereafter, next batch of storms should be after 18z Sat. && .MARINE... Relatively light winds and low seas will prevail over the next several days. Minor wind and chop enhancements near the coast in the afternoon seabreeze will be possible each day. Showers and thunderstorms will be most likely between midnight and noon. && .FIRE WEATHER... Hazardous fire weather conditions are not expected. && .HYDROLOGY... A typical summertime scattering of storms is not expected to produce any river flooding. Isolated minor flooding could be possible in urban locations under slow moving storms. && .PRELIMINARY POINT TEMPS/POPS... Tallahassee 74 91 74 91 75 / 10 60 10 60 20 Panama City 78 87 78 87 79 / 20 30 30 40 30 Dothan 74 91 74 90 74 / 20 40 20 40 20 Albany 74 93 74 91 74 / 20 30 20 30 20 Valdosta 74 93 74 92 75 / 20 40 10 40 20 Cross City 73 90 74 89 74 / 30 50 40 60 20 Apalachicola 77 87 78 87 78 / 20 40 30 50 40 && .TAE WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AL...None. GM...None. && NEAR TERM...Godsey/Harrigan SHORT TERM...Harrigan LONG TERM...Harrigan AVIATION...Godsey MARINE...Harrigan FIRE WEATHER...Pullin HYDROLOGY...Harrigan
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
310 PM EDT FRI JUL 21 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0245 PM TSTM WND DMG AMSTERDAM 30.73N 84.43W
07/21/2017 DECATUR GA 911 CALL CENTER
COUNTY DISPATCH REPORTED TREE DOWN ON US HWY 27 NEAR
AMSTERDAM.
&&
LAHRPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
314 PM EDT FRI JUL 21 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0245 PM TSTM WND DMG CALVARY 30.72N 84.35W
07/21/2017 GRADY GA 911 CALL CENTER
COUNTY DISPATCH REPORTED TREES DOWN IN GRADY COUNTY ALONG
HWY 111 NEAR CALVARY.
&&
LAHRSpecial Weather Statement
National Weather Service Tallahassee FL
354 PM EDT FRI JUL 21 2017
FLZ011-GAZ155-212045-
Jackson FL-Seminole GA-
354 PM EDT FRI JUL 21 2017
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN JACKSON COUNTY IN
THE FLORIDA PANHANDLE AND WESTERN SEMINOLE COUNTY IN SOUTHWESTERN
GEORGIA UNTIL 445 PM EDT/345 PM CDT/...
At 353 PM EDT/253 PM CDT/, National Weather Service doppler radar
indicated a strong thunderstorm 12 miles southwest of Donalsonville,
moving northwest at 10 mph.
Half inch hail and wind gusts up to 50 mph will be possible with this
storm.
Locations impacted include...
Malone, Greenwood, Bascom, Steam Mill, Desser, Lovedale, Haynes,
Drakes Still, Dellwood, Two Egg, Hornsville, Fairchild, Chipola
Terrace, Buena Vista and Marianna Municipal A/P.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3100 8517 3100 8500 3091 8484 3074 8491
3084 8526
TIME...MOT...LOC 1953Z 115DEG 10KT 3087 8497
38-GODSEYPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
402 PM EDT FRI JUL 21 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0335 PM TSTM WND DMG 7 N TALLAHASSEE REGIONA 30.50N 84.35W
07/21/2017 LEON FL NWS EMPLOYEE
TREE DOWN BLOCKING FRED GEORGE ROAD NEAR SPRINGWOOD
ELEMENTARY
&&
ADLPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
420 PM EDT FRI JUL 21 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0335 PM TSTM WND DMG 5 NNE TALLAHASSEE 30.51N 84.25W
07/21/2017 LEON FL LAW ENFORCEMENT
FLORIDA HIGHWAY PATROL WEBSITE REPORTS TREES AND POWER
LINES DOWN IN KILLEARN CENTER.
&&
LAHRSpecial Weather Statement National Weather Service Tallahassee FL 450 PM EDT FRI JUL 21 2017 GAZ146-147-159-160-212130- Brooks GA-Lowndes GA-Colquitt GA-Cook GA- 450 PM EDT FRI JUL 21 2017 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN COOK...NORTHWESTERN LOWNDES...NORTHERN BROOKS AND SOUTHEASTERN COLQUITT COUNTIES UNTIL 530 PM EDT... At 449 PM EDT, National Weather Service doppler radar indicated a a strong thunderstorm near Hahira, or 11 miles northwest of Valdosta, moving northwest at 10 mph. Half inch hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Valdosta, Hahira, I-75 At Exit 16, Remerton, Morven, Berlin, Cecil, Barney, I-75 At Exit 29, Greggs, I-75 At Exit 22 and Pine Valley. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 3104 8330 3081 8331 3085 8372 3114 8368 TIME...MOT...LOC 2049Z 134DEG 8KT 3095 8347 ADL
The Ft Rucker radar (KEOX), 23 km away, was scanning. The volume nearest the first event began at 20:56 UTC.
1 thunderstorm wind. Local standard time, as filed.
Several trees were blown down in the Kinsey and Webb areas.
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: 707111.