Alabama, 2021

Tornadoes and Flash Flood in Alabama, March 15 to 17, 2021

March 15 to 17, 2021 · NWS BMX · 30 events in 14 counties and zones

An active southern jet stream set-up across the southern United States during the middle of March. Several short-wave troughs became negatively tilted as each one traversed across Texas and towards Alabama.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
3
Property damage
None recorded
Crop damage
None recorded
Events
30

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.

What happened

The episode as NWS BMX wrote it up.

An active southern jet stream set-up across the southern United States during the middle of March. Several short-wave troughs became negatively tilted as each one traversed across Texas and towards Alabama. This resulted in a single hail event one Monday, March 15, and significant tornado outbreak on Wednesday, March 17. Many supercells began to develop across Central Alabama by midday Wednesday and continued into the evening hours before a squall line moved through the state. Sufficient instability and strong wind shear produced conditions favorable for tornadoes to develop. The event consisted of twenty-one tornadoes in the NWS Birmingham forecast area.

What forecasters said that day

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 Birmingham, AL wrote its last area forecast discussion before the first event at Mar 15, 6:10 PM CST, 2 hours 27 minutes earlier.

Area forecast discussion, Mar 15, 6:10 PM CST, 2 hours 27 minutes before
Area Forecast Discussion
National Weather Service Birmingham AL
710 PM CDT Mon Mar 15 2021

.UPDATE...
For 00Z Aviation.

&&

.SHORT TERM...
/Updated at 1157 AM CDT Mon Mar 15 2021/

Well advertised frontal boundary is currently making its way into
the northwestern portion of the state. It is a bit on the
lackluster side at this time given the weak forcing and decreasing
shear. However, there is enough instability that it will need to
be watched for further development through this afternoon and
evening. It should become less active overnight as the boundary
sags further south, although the warm sector should see some
additional development with an outside chance of a strong storm or
two.

Tomorrow, the boundary will stall and become a focus for
additional storms, especially through the heating of the day.
Additional activity some of which could be strong or marginally
severe would be along or south into the building and robust warm
sector. Most of the activity will remain loosely organized given
the absence of deep layer shear.

17/KLAWS

Previous short-term discussion:
/Updated at 324 AM CDT Mon Mar 15 2021/

Two waves of severe weather are possible today and tomorrow.

Today.

A cold front will move through Northern Mississippi this morning,
associated with an occluded low pressure system lifting through the
Central Plains. Meanwhile, we have a backdoor cold front that will
move east to west through Georgia later this morning as well,
wedging Central AL in the middle, allow for abundant southerly flow
and moisture advection. Models show much of West-Central AL
destabilizing fairly quickly ahead of the frontal boundary to our
west with CAPE values reaching 1500-2000+ J/kg. As this line of
storms initially moves into our west and northwestern areas, there's
sufficient shear along with the instability to support strong to
severe storms. However, the overall forcing that could initiate the
convection begins to weaken considerably as the surface low builds
eastward, separating from the upper level low that lifts northward.
Current thinking is that we'll have numerous showers and
thunderstorms across the northwestern half of Central AL through
Monday afternoon associated with ascent in this wedge pattern, even
if the main cold front doesn't quite make it into our area. A few of
these storms could put down damaging wind gusts given the
thermodynamic support. A brief tornado cannot be ruled out, though
without the surface-based convergent forcing, we shouldn't see a
widespread tornado threat.

Tuesday.

As the surface low separates from the upper low and shifts eastward
through the Ohio Valley late Monday night into Tuesday (after
midnight), the cold front essentially meshes with the backdoor cold
front boundary and everything pushes southward through Central AL.
Along this boundary, we could see an re-intensification of
convection generally along and south of I-59. The unstable air mass
across much of the area somewhat stabilizes with the loss of
daytime heating, but still remains unstable with CAPE values
ranging from 800-1200 J/kg. The wind profiles show more veering of
the surface winds by this point, so the tornado threat might
decrease, but I wouldn't completely rule it out. A few of the CAMs
pick up on this increased convection overnight and into the day
on Tuesday, though the vary on the coverage and location.
Therefore, the severe weather risk will likely continue into
tomorrow. The southern extent of the risk will depend on how far
south the frontal boundary reaches on Tuesday before it starts
lifting northward as an effective warm front.

25/Owen

.LONG TERM...
/Updated at 225 PM CDT Mon Mar 15 2021/

Significant Severe Weather Expected Wednesday

Fast southwest flow will be well-established aloft as we head
into the long-term forecast period. A potent upper low will be
moving out of New Mexico into into Northwest Texas. Global
modeling remains in good agreement with the upper low moving east
into the Mid South region late Wednesday into the day Thursday.
Shortwave disturbances will ripple over the area aloft as we go
through the day on Wednesday. Expect the upper low to move east
across the Tennessee Valley region Thursday through Friday with
residual troughing persisting across the eastern and central
portions of the area as we approach the next weekend.

At the surface, a stationary front from today's system currently
moving into the area is expected to be draped from west to east
across our central counties early Wednesday morning. This boundary
will lift northward as a warm front through the morning hours
with shower and thunderstorm activity most likely near and north
of the boundary. A more subtle coastal/marine front is depicted in
some lower-level moisture fields which will move northward into
the forecast area through the morning hours.

Wednesday.

We expect potentially three opportunities for severe weather on
Wednesday. The first being the northward advancement of the warm
front during the morning hours along with the coastal/marine
airmass advecting northward into the area as low-level winds
increase off the surface. Storms may initially be more elevated in
nature, posing more of a hail risk but are expected to become
more rooted toward the surface as moisture increases further from
the south. A second and more concerning round will potentially
develop from midday through the mid afternoon time frame as the
environment further destabilizes while the low-level Jet
approaches from the west. Instability values look to exceed 2000
J/kg with 0-1 km storm-relative helicity values over 150 m2/s2
from most depictions. The moist low-level environment also
supports lower cloud bases further increasing the risk for
circulations aloft to reach the surface. Finally, the Pacific
Front will act as a focusing mechanism for severe convection along
and potentially ahead of the front as it advances east across the
area Wednesday evening and into the night.

As far as uncertainties go, there is high confidence in an
abundance of wind speed and directional shear with more than
sufficient hodograph curvature for rotating storms. A robust Low-
Level Jet and sufficient 0-6 km bulk shear values will favor
organized severe convection. Instability is a bit more
questionable though the environment will be warm, moist and
unstable in the lower levels as a certainty. If low-level
advection is stronger from the south, that will help to further
increase the magnitude of instability as will be the case if we
see breaks in the cloud cover through the morning hours on
Wednesday for the convective potential in the afternoon and
evening. A question also arises on the magnitude of a capping
inversion in the warm sector airmass from mid morning through
early afternoon and whether instability can sufficiently build
before being released convectively. The exact placement of the
surface features along with magnitude of advection and cap
strength will be assessed better with the higher-resolution
guidance we will have access to as we get closer to the event
time.

Overall, all modes of severe weather are expected from tornadoes,
some potentially significant, damaging straight-line winds and
large hail. Severe convective risk will persist across the
forecast area all day Wednesday into Wednesday night. Despite the
loss of daylight in the evening and into the overnight hours
Wednesday night, more than sufficient dynamics are expected to
compensate for gradual decreasing low-level instability. There
will be heavy rain potential through this period as well,
especially when accounting for activity ongoing today and Tuesday.
Ground conditions are dry and vegetation is out of dormancy so
these factors will help to limit flooding concerns but some
localized flooding may result, especially in low-lying and poor
drainage areas.

It is strongly emphasized that now is the time to prepare for
multiple convective hazards. Ensure you have multiple reliable
methods to receive weather warnings, have your emergency supplies
ready and know where to go when severe weather approaches your
area.

Thursday through Saturday.

Beyond Wednesday, we will have improving conditions through the
day on Thursday as shower and thunderstorm activity become
increasingly confined to the east of the state. Cooler and drier
air will move in from the northwest. Residual troughing aloft and
a more northeast low-level flow looks to promote wedging effects,
resulting in cooler temperatures northeast into the weekend with
some increase in clouds. I maintained a dry forecast for this
issuance but some low-end PoPs may be needed for our northeast
counties Saturday into Sunday if trends continue.

05

&&

.AVIATION...
00Z TAF Discussion.

Some non VFR conditions may occur in SHRAs this evening, but for
the most part we are VFR to start. Conditions will deteriorate
overnight as MVFR first this evening, then IFR and below
conditions will develop after midnight and spread across C AL.
We remain in a wet and unsettled atmosphere for the next couple of
days. Waves of convection will continue through the forecast as an
upper low moves slowly across the W US ejecting shortwaves across
the Deep South in the SW/WSW upper flow.

08

&&

.FIRE WEATHER...

Unsettled conditions are expected through mid week with increasing
chances for showers and thunderstorms. Conditions will improve
through the day on Thursday with cooler and drier weather moving
into the area later this week.

&&

.PRELIMINARY POINT TEMPS/POPS...
Gadsden     55  72  54  73  57 /  90  80  60  80  90
Anniston    59  72  58  77  58 /  90  80  60  80 100
Birmingham  62  74  61  78  56 /  90  80  70  90  90
Tuscaloosa  63  76  62  81  54 /  80  80  70 100  90
Calera      62  74  60  78  57 /  90  90  70  80  90
Auburn      61  72  60  76  60 /  20  90  70  50 100
Montgomery  64  77  62  81  60 /  20  90  70  60 100
Troy        64  79  62  81  61 /  20  80  70  40 100

&&

.BMX WATCHES/WARNINGS/ADVISORIES/...
None.

&&

17/25/05/08
Hazardous weather outlook, Mar 15, 6:21 PM CST, 2 hours 16 minutes before
Hazardous Weather Outlook
National Weather Service Birmingham AL
721 PM CDT Mon Mar 15 2021

ALZ011>015-017>050-170330-
Marion-Lamar-Fayette-Winston-Walker-Blount-Etowah-Calhoun-Cherokee-
Cleburne-Pickens-Tuscaloosa-Jefferson-Shelby-St. Clair-Talladega-
Clay-Randolph-Sumter-Greene-Hale-Perry-Bibb-Chilton-Coosa-Tallapoosa-
Chambers-Marengo-Dallas-Autauga-Lowndes-Elmore-Montgomery-Macon-
Bullock-Lee-Russell-Pike-Barbour-
721 PM CDT Mon Mar 15 2021

This Hazardous Weather Outlook is for the counties served by the
National Weather Service office in Birmingham.

.DAY ONE...Outlook through Tonight.

A couple severe storms may occur during the overnight and early
morning hours. The primary hazards are large hail and damaging
winds. A brief tornado cannot be ruled out.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Severe thunderstorms are possible again through 10 pm Tuesday for
much of Central Alabama. Damaging winds and large hail are the main
threats. A brief tornado cannot be ruled out.

Severe storms are likely Wednesday afternoon into early Thursday
morning. Threats include strong tornadoes, large hail, and damaging
winds up to 60 mph. Stay tuned for forecast updates.

.SPOTTER INFORMATION STATEMENT...

Activation of storm spotters and emergency management may be needed
on Monday, Tuesday, and again on Wednesday and Wednesday night.
Please follow all local, state, and CDC guidelines in regards to
travel.

The radar

The Northeast Alabama radar (KHTX), 104 km away, was scanning. The volume nearest the first event began at 02:39 UTC.

Open the radar archive at this moment

Event by event

23 tornado, 3 hail, 3 thunderstorm wind, 1 flash flood. Local standard time, as filed.

Hail, Etowah

When
March 15, 8:37 PM CST to 8:38 PM CST
Where
Etowah County, Southside
Measured
1 in hail
Reported by
Public
Coordinates
34.000, -86.020

Hail, Lamar

When
March 17, 11:20 AM CST to 11:21 AM CST
Where
Lamar County, 1.54 mi SW of Moscow
Measured
1 in hail
Reported by
Public
Coordinates
33.853, -88.118

Dime to quarter size hail along Highway 17 near the intersection of Military Grove Road.

Tornado, Sumter

When
March 17, 11:31 AM CST to 11:32 AM CST
Where
Sumter County, 1.99 mi SE of Siloam to 2.05 mi ESE of Siloam
Rating
EF0
Path length
0.35 mi
Path width
70 yd
Reported by
NWS Storm Survey
Coordinates
32.413, -88.242

National Weather Service meteorologists surveyed damage in southern Sumter County and determined that it was consistent with an EF0 tornado, with maximum winds near 75 mph. The tornado began and ended near the intersection of Walker Road and Highway 17. Damage consisted of uprooted trees, broken large tree branches, and shingle damage to a residence.

Tornado, Dallas

When
March 17, 11:32 AM CST to 11:45 AM CST
Where
Dallas County, 0.48 mi SSW of Selma Selfield Arpt to 1.01 mi WNW of Burnsville
Rating
EF2
Path length
5.08 mi
Path width
1,000 yd
Injuries
2 direct, 0 indirect
Reported by
NWS Storm Survey
Coordinates
32.424, -86.954

National Weather Service meteorologists surveyed damage in northeastern Dallas County and determined that it was consistent with an EF2 tornado, with maximum winds near 115 mph. The tornado first touched down near Water Avenue just south of State Road 14, initially producing minor tree damage. The tornado quickly intensified snapping and uprooting large stands of hardwood trees as it moved into the Burnsville community. Near State Road 14 and County Road 871, a well built home sustained structural damage including the loss of a carport, roof damage, broken windows, and partial loss of one wall structure. An unanchored manufactured home next door was completely destroyed with the remaining contents blown across the road and scattered over 100 yards. A vehicle at this residence was rolled and sustained damage. The tornado continued to move rather slowly off to the northeast causing additional trees to fall. Several additional homes along the path sustained structural damage of mainly roof uplift and loss of shingles. Another manufactured home with some anchoring was rolled and blown apart on the north side of State Road 14. There were two occupants inside the home who were sheltering. They survived and crawled out with minor injuries. Farther northeast along State Road 14, a two story home sustained structural damage along with additional damage from falling trees. They were very large hardwood trees snapped near the base. A motorist trying to evade the tornado attempted to take shelter here and narrowly missed a large falling tree. At this point the tornado was likely at its widest reaching nearly 1000 yards. The tornado crossed State Road 14 moving into a mostly forested area producing significant tree damage before crossing County Road 261. Here a wide swath of trees and power lines were downed. The tornado finally weakened and lifted before reaching County Road 880.

Tornado, Sumter

When
March 17, 11:57 AM CST to 12:15 PM CST
Where
Sumter County, 2.38 mi WNW of Brewersville to 1.8 mi SSE of Epes
Rating
EF1
Path length
9.78 mi
Path width
475 yd
Reported by
NWS Storm Survey
Coordinates
32.539, -88.134

National Weather Service meteorologists surveyed damage in east central Sumter County and determined that it was consistent with an EF1 tornado, with maximum winds near 105 mph. A tornado touched down on the south side of Highway 28 East just west of Adams Drive. The tornado traveled north and produced mostly tree damage, with numerous hardwood and softwood trees snapped or uprooted. A home in the Bluffport community lost part of its roof and a mobile home was shifted from its blocks. The tornado lifted just north of Port of Epes Highway.

Tornado, Autauga

When
March 17, 12:24 PM CST to 12:27 PM CST
Where
Autauga County, 2.27 mi NNE of Haynes to 3.07 mi NW of White City
Rating
EF1
Path length
2.87 mi
Path width
150 yd
Reported by
NWS Storm Survey
Coordinates
32.662, -86.692

National Weather Service meteorologists surveyed damage in northern Autauga County and determined that it was consistent with an EF1 tornado, with maximum winds near 90 mph. A tornado touched down near Tom Turner Road where minor tree damage was noted. The tornado traveled east-northeast nearly paralleling County Road 24. Here, large trees were snapped near a home with several causing minor damage to the home and a porch. Farther down the road, another home sustained minor roof damage. The tornado appeared to weaken rather dramatically with only minor evidence of tree damage before the tornado lifted west of County Road 19.

Hail, Pickens

When
March 17, 12:55 PM CST to 12:57 PM CST
Where
Pickens County, Gordo
Measured
2.5 in hail
Reported by
Social Media
Coordinates
33.320, -87.900

Tennis ball size hail reported near the town of Gordo.

Tornado, Chilton

When
March 17, 12:56 PM CST to 1:03 PM CST
Where
Chilton County, 2.91 mi ENE of Falakto to 4.88 mi E of Clanton Gragg Arpt
Rating
EF1
Path length
3.04 mi
Path width
500 yd
Reported by
NWS Storm Survey
Coordinates
32.816, -86.554

National Weather Service meteorologists surveyed damage in eastern Chilton County and determined that it was consistent with an EF1 tornado, with maximum winds near 95 mph. A tornado touched down near County Road 484 and tracked north-northeast producing mainly tree damage along County Roads 491 and 97. Hardwood trees were snapped and uprooted along County Roads 486 and 491. Some minor structural damage was also noted with damage to farm buildings and an outbuilding. The tornado widened to about 500 yards in this area. As the tornado continued northeast towards County Road 28, it began to weaken with more minor tree damage noted. The tornado dissipated quickly just north of County Road 28.

Tornado, Marengo

When
March 17, 1:03 PM CST to 1:05 PM CST
Where
Marengo County, 2.21 mi WSW of Shortleaf to 1.43 mi W of Shortleaf
Rating
EF0
Path length
0.83 mi
Path width
175 yd
Reported by
NWS Storm Survey
Coordinates
32.512, -87.887

National Weather Service meteorologists surveyed damage in far northern Marengo County and determined that it was consistent with an EF0 tornado, with maximum winds near 80 mph. The short-lived tornado began near Water Street and crossed Lock and Dam Road, dissipating before reaching the Tombigbee River. Damage consisted of uprooted trees, large tree branches broken, and some paneling pulled from a building.

Tornado, Hale

When
March 17, 1:12 PM CST to 1:30 PM CST
Where
Hale County, 3.11 mi NNW of Akron to 0.36 mi NNE of Moundville
Rating
EF1
Path length
10.5 mi
Path width
300 yd
Continued into
Tuscaloosa, Al (BMX)
Reported by
NWS Storm Survey
Coordinates
32.908, -87.758

National Weather Service meteorologists surveyed damage in northwestern Hale County and determined that it was consistent with an EF1 tornado, with maximum winds near 105 mph. A tornado touched down near Martin Slough Lake in a mostly inaccessible area just east of the Black Warrior River. It traveled northeast causing mostly sporadic timber damage. Upon entering the town of Moundville, stronger winds were indicated by varying degrees of minor to moderate structural damage, including damage to the post office and a nearby apartment building. Many other structures were damaged from falling trees and other flying debris based on video footage. The tornado crossed into Tuscaloosa County near the intersection of Highway 72 and Highway 69.

Tornado, Marengo

When
March 17, 1:22 PM CST to 1:27 PM CST
Where
Marengo County, 0.18 mi SSW of Coxheath to 0.83 mi SSE of Sweet Water
Rating
EF1
Path length
2.77 mi
Path width
500 yd
Reported by
NWS Storm Survey
Coordinates
32.068, -87.901

National Weather Service meteorologists surveyed damage in southern Marengo County and determined that it was consistent with an EF1 tornado, with maximum winds near 90 mph. A tornado touched down south of the town of Sweet Water along County Road 6. It continued northeastward and reached its maximum intensity along County Road 7. The tornado dissipated as it crossed Highway 10 just southeast of Sweet Water. Damage was limited to numerous snapped trees.

Tornado, Coosa

When
March 17, 1:29 PM CST to 1:31 PM CST
Where
Coosa County, 2.09 mi WSW of Weogufka to 1.96 mi WSW of Weogufka
Rating
EF0
Path length
0.13 mi
Path width
25 yd
Reported by
NWS Storm Survey
Coordinates
33.006, -86.352

National Weather Service meteorologists surveyed damage in northwest Coosa County and determined that it was consistent with an EF0 tornado, with maximum winds near 65 mph. The tornado began and ended around County Road 56. Damage was limited to an uprooted pine tree, and several trees had broken branches. A brief TDS was also noted on the BMX radar.

Tornado, Tuscaloosa

When
March 17, 1:30 PM CST to 1:55 PM CST
Where
Tuscaloosa County, 3.11 mi S of Hull to 1.89 mi E of Stokes
Rating
EF1
Path length
11.53 mi
Path width
550 yd
Reported by
NWS Storm Survey
Coordinates
33.005, -87.618

National Weather Service meteorologists surveyed damage in southwest Tuscaloosa County and determined that it was consistent with an EF1 tornado, with maximum winds near 110 mph. This tornado crossed from Hale County into Tuscaloosa County near the intersection of Highway 69 and Highway 72 in the city of Moundville. The tornado impacted a subdivision on Waterbury Drive and caused structural damage to a church and several homes. Farther northeast, the tornado produced sporadic timber damage, and lofted/flipped some campers on Old Greensboro Road. The most significant damage occurred along South Rosser Road where a few mobile homes were destroyed from a fallen tree. A corridor of fairly significant timber damage was also observed along South Rosser Road. The tornado continued northeast toward South Ridge Road before dissipating just west of Highway 82.

Flash Flood, Jefferson

When
March 17, 2:00 PM CST to 3:30 PM CST
Where
Jefferson County, 0.58 mi E of Ensley to 1.05 mi W of Thomas Jct
Cause
Heavy Rain
Reported by
COOP Observer
Coordinates
33.520, -86.890

Village Creek at Avenue W went into flood and several roads in the Ensley Community were flooded and impassable.

Tornado, Tuscaloosa

When
March 17, 2:09 PM CST to 2:11 PM CST
Where
Tuscaloosa County, 1.86 mi NE of Grimes to 2.22 mi NW of Coaling
Rating
EF1
Path length
0.53 mi
Path width
150 yd
Reported by
NWS Storm Survey
Coordinates
33.191, -87.379

National Weather Service meteorologists surveyed damage in eastern Tuscaloosa County and determined that it was consistent with an EF1 tornado, with maximum winds near 90 mph. A short-lived tornado touched down near Lake Wildwood, east of Cottondale. However, it still managed to produce timber and minor structural damage that was consistent with EF1 strength. The tornado dissipated near Lawton Road.

Tornado, Tuscaloosa

When
March 17, 2:25 PM CST to 2:34 PM CST
Where
Tuscaloosa County, 1.29 mi WNW of Brookwood to 0.7 mi NW of Shook
Rating
EF1
Path length
3.51 mi
Path width
650 yd
Reported by
NWS Storm Survey
Coordinates
33.289, -87.300

National Weather Service meteorologists surveyed damage in eastern Tuscaloosa County and determined that it was consistent with an EF1 tornado, with maximum winds near 100 mph. The tornado touched down along Lock 17 Road near Warrior Met Coal. The tornado tracked north-northeasterly and produced significant timber damage. Damage was also sustained to a metal warehouse on Davis Road where siding and roofing material was lofted east to west into the tree line. Downstream, a long corridor of significant timber damage was observed along with minor damage to a communications tower near the intersection of Hannah Creek Road and Searles Road. The tornado continued north-northeast across a mostly inaccessible wooded area where the last point of observable damage occurred at the end of Alabama Junction.

Tornado, Tuscaloosa

When
March 17, 2:54 PM CST to 3:05 PM CST
Where
Tuscaloosa County, 0.72 mi NE of Kellerman to 4.92 mi NNE of Shook
Rating
EF1
Path length
5.46 mi
Path width
650 yd
Continued into
Jefferson, Al (BMX)
Reported by
NWS Storm Survey
Coordinates
33.336, -87.310

National Weather Service meteorologists surveyed damage in northeastern Tuscaloosa County and determined that it was consistent with an EF1 tornado, with maximum winds near 110 mph. A tornado touched down in rural Tuscaloosa county with numerous hardwood and softwood trees were snapped or uprooted. Damage began along Burchfield Road where the most intense damage was observed. The tornado moved through mostly inaccessible areas, crossing Cane Creek, Davis Creek, and Rockhouse Creek before crossing into Jefferson County near Ethridge Road.

Tornado, Jefferson

When
March 17, 3:05 PM CST to 3:06 PM CST
Where
Jefferson County, 5.66 mi W of Mud Creek to 5.39 mi W of Mud Creek
Rating
EF0
Path length
0.35 mi
Path width
45 yd
Reported by
NWS Storm Survey
Coordinates
33.396, -87.248

National Weather Service meteorologists surveyed damage in southwest Jefferson County and determined that it was consistent with an EF0 tornado, with maximum winds near 80 mph. This tornado began in Tuscaloosa County and crossed into Jefferson County near Ethridge Road. Damage consisted of a few uprooted trees. The tornado dissipated soon after it moved into Jefferson County.

Tornado, Dallas

When
March 17, 3:11 PM CST to 3:13 PM CST
Where
Dallas County, 0.58 mi NW of Central Mills to 1 mi NNE of Central Mills
Rating
EF0
Path length
1.07 mi
Path width
75 yd
Reported by
NWS Storm Survey
Coordinates
32.285, -87.428

National Weather Service meteorologists surveyed damage in southwest Dallas County and determined that it was consistent with an EF0 tornado, with maximum winds near 65 mph. The tornado touched down near State Road 66, just east of County Road 109. At this location, a few large branches were snapped off. The tornado tracked northeast through pastureland where additional minor tree damage was observed. The tornado lifted just north of County Road 109 where a large softwood tree was uprooted.

Tornado, Jefferson

When
March 17, 3:30 PM CST to 3:38 PM CST
Where
Jefferson County, 1.34 mi WNW of Ben Vines Gap to 0.38 mi ESE of Mulga Mine
Rating
EF1
Path length
2.77 mi
Path width
650 yd
Reported by
NWS Storm Survey
Coordinates
33.537, -87.022

National Weather Service meteorologists surveyed damage in west Jefferson County and determined that it was consistent with an EF1 tornado, with maximum winds near 110 mph. The tornado touched down along Crocker Road. At a landfill along Porter Road, several garage doors were blown in, a tractor trailer was blown over, and an outbuilding was destroyed. The tornado reached its maximum intensity where Shady Grove Road crosses Village Creek, snapping numerous trees. The tornado continued into an inaccessible wooded area near Bayview Lake and dissipated prior to reaching Hazelwood Road.

Tornado, Marengo

When
March 17, 3:34 PM CST to 3:40 PM CST
Where
Marengo County, 2.8 mi S of Putnam to 2.21 mi SE of Putnam
Rating
EF1
Path length
1.93 mi
Path width
110 yd
Reported by
NWS Storm Survey
Coordinates
31.990, -88.022

National Weather Service meteorologists surveyed damage in southwest Marengo County and determined that it was consistent with an EF1 tornado, with maximum winds near 110 mph. This long track tornado began in the NWS Mobile forecast area and traveled almost 35 miles through Wayne, Choctaw, and Clarke Counties as an EF-2 tornado. It weakened to an EF-1 tornado as it crossed into Marengo County. It continued to snap and uproot numerous trees as it crossed Highway 69. The tornado dissipated in a wooded area northeast of Highway 69.

Tornado, Marengo

When
March 17, 3:54 PM CST to 3:58 PM CST
Where
Marengo County, 0.55 mi S of Sweet Water to 1.22 mi NNE of Sweet Water
Rating
EF0
Path length
1.75 mi
Path width
75 yd
Reported by
NWS Storm Survey
Coordinates
32.092, -87.870

National Weather Service meteorologists surveyed damage in southern Marengo County and determined that it was consistent with an EF0 tornado, with maximum winds near 65 mph. The tornado began near 3rd Avenue in Sweet Water and proceeded north crossing Highway 10. The tornado continued north of Sweet Water, dissipating near Beaver Creek Road. Damage mainly consisted of broken large tree branches.

Tornado, Jefferson

When
March 17, 3:56 PM CST to 4:04 PM CST
Where
Jefferson County, 1.57 mi SE of Mt Olive to 2.05 mi SSE of Monmouth
Rating
EF0
Path length
3.46 mi
Path width
660 yd
Injuries
1 direct, 0 indirect
Reported by
NWS Storm Survey
Coordinates
33.662, -86.853

National Weather Service meteorologists surveyed damage in northern Jefferson County and determined that it was consistent with an EF0 tornado, with maximum winds near 85 mph. A tornado touched down near Sutherland Road on the west side of Interstate 65 and tracked northeast crossing Interstate 65 and Highway 31. Damage consisted of downed trees with relatively minor structural damage. However, there were several instances of significant residential and vehicle damage from fallen trees. One person was taken to the hospital with non-life-threatening injuries.

Tornado, Chilton

When
March 17, 4:12 PM CST to 4:23 PM CST
Where
Chilton County, 4.09 mi ESE of Pletcher to 0.34 mi NNW of Kincheon
Rating
EF2
Path length
5.84 mi
Path width
400 yd
Reported by
NWS Storm Survey
Coordinates
32.675, -86.736

National Weather Service meteorologists surveyed damage in southwest Chilton County and determined that it was consistent with an EF2 tornado, with maximum winds near 130 mph. A tornado touched down in an inaccessible area near Little Mulberry Creek northwest of Billingsley. It continued north-northeastward, uprooting a few trees along County Road 361. The tornado intensified as it crossed County Road 37 near the intersection with County Road 24. Near this intersection, an unanchored home was shifted off of its foundation and a large anchored building was destroyed. In addition, a doublewide manufactured home was completely destroyed with debris blown downstream, some exterior walls of a brick residence were collapsed, and outbuildings were damaged. The occupants of the manufactured home reported getting the warning and taking shelter with additional family members in a storm shelter minutes before the storm hit. The resident of the brick structure also reported receiving the warning and taking cover in an interior closet with a friend. Both were uninjured. Also near this intersection, another residence suffered roof damage, two vehicles were moved 15 feet, and multiple trees were uprooted. The tornado continued northeastward through a wooded area, snapping numerous trees before dissipating as it crossed County Road 16 just east of Pools Crossroads.

Tornado, Blount

When
March 17, 4:43 PM CST to 5:05 PM CST
Where
Blount County, 2.25 mi SSE of Tidwell to 1.48 mi SSE of Clarence
Rating
EF1
Path length
12.89 mi
Path width
300 yd
Reported by
NWS Storm Survey
Coordinates
33.923, -86.559

National Weather Service meteorologists surveyed damage in Blount County and determined that it was consistent with an EF1 tornado, with maximum winds near 100 mph. The tornado began near Tim King Road along Hunt Mountain. It moved northeast and crossed Highway 231, with damage consisting mainly of snapped and uprooted trees. The tornado then crossed Wilson Chapel Road where it snapped a couple of trees and rolled a camper at a residence before dissipating.

Thunderstorm Wind, Lamar

When
March 17, 6:55 PM CST to 6:56 PM CST
Where
Lamar County, 4.3 mi NNW of Millport
Measured
50 kt (58 mph) estimated gust
Reported by
Public
Coordinates
33.630, -88.100

Roof blown off tractor barn.

Tornado, Autauga

When
March 17, 7:35 PM CST to 7:36 PM CST
Where
Autauga County, 3.13 mi NW of Poseys Xrds to 3.09 mi NW of Poseys Xrds
Rating
EF0
Path length
0.13 mi
Path width
75 yd
Reported by
NWS Storm Survey
Coordinates
32.600, -86.610

National Weather Service meteorologists surveyed damage in northern Autauga County and determined that it was consistent with an EF0 tornado, with maximum winds near 70 mph. This short-lived tornado touched down and dissipated near the intersection of County Road 43 and County Road 21. Damage consisted of a destroyed metal outbuilding and a few snapped softwood trees. The tornado also caused damage to a nearby carport which was lofted into an open field. The tornado continued northeast into an open pasture where it dissipated.

Thunderstorm Wind, Autauga

When
March 17, 9:13 PM CST to 9:14 PM CST
Where
Autauga County, 1.88 mi WSW of Marbury
Measured
50 kt (58 mph) estimated gust
Reported by
Emergency Manager
Coordinates
32.690, -86.510

A few trees uprooted along County Road 20.

Thunderstorm Wind, Autauga

When
March 17, 9:16 PM CST to 9:17 PM CST
Where
Autauga County, 1.38 mi N of Prattville
Measured
50 kt (58 mph) estimated gust
Reported by
Emergency Manager
Coordinates
32.490, -86.480

A few trees uprooted near the intersection of Upper Kingston Road and Gardner Road.

Tornado, Montgomery

When
March 17, 9:43 PM CST to 9:44 PM CST
Where
Montgomery County, 4.04 mi N of Pine Level to 4.2 mi N of Pine Level
Rating
EF0
Path length
0.3 mi
Path width
140 yd
Reported by
NWS Storm Survey
Coordinates
32.128, -86.080

National Weather Service meteorologists surveyed damage in eastern Montgomery County and determined that it was consistent with an EF0 tornado, with maximum winds near 80 mph. The short-lived tornado touched down on the east side of Highway 231 just north of County Road 72. The tornado produced damage on a farmstead, uprooting trees in the front yard, destroying a playhouse and trampoline. A tree fell on the house, damaging the roof. Additional structural damage was also noted to the roof mainly in form of shingle loss. The tornado continued northeast across the property uprooting mainly softwood trees with some sporadic snapping of trees along its path. The tornado lifted near the back pastureland.

What these are

Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Tornado
A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.
Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Alabama in 2021Every state in 2021This day in weather historyThe tornado archive for Alabama, 2021Warnings in Alabama, March 2021

Sources

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: 944676, 944739, 944744, 944749, 944763, 944794, 944826, 944813, 944848, 944864, 944900, 944904, 944886, 945191, 944922, 944937, 944958, 944981, 945099, 945105, 945106, 945109, 945111, 945112, 945121, 945170, 945125, 945157, 945161, 945132.