Alert archive / Alabama / Tornado Warnings in 2021

Tornado Warning 11, NWS Birmingham, AL

March 17, 2021Marengo County, Alabama

NWS Birmingham, AL issued this tornado warning at Mar 17, 2021, 1:58 PM CDT for Marengo County, Alabama. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 17, 2021, 1:58 PM CDT (18:58 UTC)
Expired: Mar 17, 2021, 3:00 PM CDT
In force: 62 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Marengo County, AL

The radar

The Birmingham radar (KBMX), 147 km from the middle of the area, began a volume at 19:03 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 17, 11:36 AM CDT	Tornado Watch PDS	SPC	7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 7.0 hours before the alert went out and 147 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 658 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 759 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 169 m²/s²
0-3 km storm-relative helicity: 301 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

As transmitted.

246 
WFUS54 KBMX 171858
TORBMX
ALC091-172000-
/O.NEW.KBMX.TO.W.0011.210317T1858Z-210317T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Birmingham AL
158 PM CDT Wed Mar 17 2021

The National Weather Service in Birmingham has issued a

* Tornado Warning for...
  Central Marengo County in southwestern Alabama...

* Until 300 PM CDT.
    
* At 157 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Pennington, or 14 miles southwest of Linden, 
  moving northeast at 45 mph. Another storm capable of producing a 
  tornado is southwest of Butler.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations impacted include...
  Demopolis, Linden, Uniontown, Jefferson, Myrtlewood, Faunsdale,
  Dayton, Freddie Jones Field, Pin Hook, Nanafalia, Chickasaw State
  Park, Half Acre, Old Spring Hill and Calvary.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3208 8804 3214 8804 3217 8801 3228 8802
      3231 8798 3231 8795 3228 8794 3228 8793
      3231 8793 3235 8797 3235 8799 3253 8778
      3252 8773 3248 8772 3248 8752 3239 8752
      3200 8808 3200 8811 3205 8812
TIME...MOT...LOC 1857Z 228DEG 38KT 3220 8801 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

32/Davis

2 follow-up statements

118 
WWUS54 KBMX 171920
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
220 PM CDT Wed Mar 17 2021

ALC091-172000-
/O.CON.KBMX.TO.W.0011.000000T0000Z-210317T2000Z/
Marengo AL-
220 PM CDT Wed Mar 17 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR CENTRAL
MARENGO COUNTY...
    
At 219 PM CDT, a severe thunderstorm capable of producing a tornado 
was located over Linden, moving northeast at 40 mph. Several other 
thunderstorms capable of producing tornadoes are across Marengo 
County.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Linden, Uniontown, Myrtlewood, Faunsdale, Dayton, Freddie Jones
Field, Pin Hook, Nanafalia, Chickasaw State Park, Calvary, Half Acre
and Old Spring Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3208 8804 3214 8804 3217 8801 3228 8802
      3231 8798 3231 8795 3228 8794 3228 8793
      3231 8793 3235 8794 3251 8774 3252 8773
      3248 8772 3248 8752 3239 8752 3200 8808
      3200 8811 3205 8812
TIME...MOT...LOC 1919Z 236DEG 34KT 3230 8780 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

32/Davis

480 
WWUS54 KBMX 171941
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
241 PM CDT Wed Mar 17 2021

ALC091-172000-
/O.CON.KBMX.TO.W.0011.000000T0000Z-210317T2000Z/
Marengo AL-
241 PM CDT Wed Mar 17 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR CENTRAL
MARENGO COUNTY...
    
At 240 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Dayton, or 8 miles northeast of Linden, moving 
northeast at 30 mph. A confirmed tornado is also located southeast 
of Miller.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Linden, Uniontown, Faunsdale, Dayton, Freddie Jones Field, Pin Hook,
Chickasaw State Park, Calvary, Half Acre and Old Spring Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3227 8792 3235 8794 3251 8774 3252 8773
      3248 8772 3248 8752 3239 8752 3209 8795
      3210 8798
TIME...MOT...LOC 1940Z 223DEG 27KT 3240 8770 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

32/Davis

The office that day

Everything else NWS Birmingham, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 16, 9:59 PM CDT	Special Weather Statement	BMX	Sumter	46 min
Mar 16, 10:11 PM CDT	Severe Thunderstorm Warning	BMX	Sumter	24 min
Mar 16, 10:38 PM CDT	Special Weather Statement	BMX	Hale	37 min
Mar 17, 1:27 AM CDT	Dense Fog Advisory	BMX	Autauga, Barbour, Blount, Bullock, Calhoun, Chambers and 22 more	6 hr
Mar 17, 11:18 AM CDT	Special Weather Statement	BMX	Jefferson	27 min
Mar 17, 12:13 PM CDT	Tornado Warning	BMX	Dallas	47 min
Mar 17, 12:19 PM CDT	Areal Flood Advisory	BMX	Jefferson, Tuscaloosa	2 hr
Mar 17, 12:21 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Marion	25 min
Mar 17, 12:41 PM CDT	Tornado Warning	BMX	Autauga	64 min
Mar 17, 12:59 PM CDT	Tornado Warning	BMX	Greene, Sumter	61 min
Mar 17, 1:18 PM CDT	Tornado Warning	BMX	Autauga, Chilton, Elmore	57 min
Mar 17, 1:40 PM CDT	Severe Thunderstorm Warning	BMX	Pickens, Tuscaloosa	28 min
Mar 17, 1:52 PM CDT	Tornado Warning	BMX	Greene, Hale, Marengo, Sumter	41 min
Mar 17, 1:59 PM CDT	Tornado Warning	BMX	Greene, Hale	46 min
Mar 17, 2:02 PM CDT	Tornado Warning Tornado observed	BMX	Chilton, Coosa	58 min
Mar 17, 2:09 PM CDT	Tornado Warning	BMX	Marengo	66 min
Mar 17, 2:14 PM CDT	Tornado Warning	BMX	Jefferson, Walker	61 min
Mar 17, 2:20 PM CDT	Tornado Warning Tornado observed	BMX	Tuscaloosa	40 min
Mar 17, 2:33 PM CDT	Tornado Warning Tornado observed	BMX	Clay, Coosa, Talladega	42 min
Mar 17, 2:44 PM CDT	Flash Flood Warning	BMX	Hale, Marengo, Perry	2 hr
Mar 17, 2:47 PM CDT	Areal Flood Advisory	BMX	Greene, Pickens, Sumter, Tuscaloosa	2 hr
Mar 17, 2:48 PM CDT	Areal Flood Advisory	BMX	Blount, Jefferson, Walker	2 hr
Mar 17, 2:48 PM CDT	Areal Flood Advisory	BMX	Fayette, Lamar, Marion, Walker, Winston	2 hr
Mar 17, 2:51 PM CDT	Flash Flood Warning	BMX	Jefferson	2 hr
Mar 17, 2:53 PM CDT	Tornado Warning Tornado observed	BMX	Tuscaloosa	52 min
Mar 17, 2:54 PM CDT	Tornado Warning	BMX	Dallas, Marengo, Perry	66 min
Mar 17, 2:58 PM CDT	Tornado Warning	BMX	Blount, Jefferson	34 min
Mar 17, 3:21 PM CDT	Tornado Warning	BMX	Tuscaloosa	54 min
Mar 17, 3:25 PM CDT	Flash Flood Warning	BMX	Tuscaloosa	2 hr
Mar 17, 3:28 PM CDT	Areal Flood Advisory	BMX	Dallas, Perry	2 hr
Mar 17, 3:34 PM CDT	Tornado Warning Tornado observed	BMX	Jefferson, Walker	56 min
Mar 17, 3:37 PM CDT	Tornado Warning	BMX	Marengo	38 min
Mar 17, 3:58 PM CDT	Tornado Warning Tornado observed	BMX	Jefferson	47 min
Mar 17, 3:58 PM CDT	Tornado Warning	BMX	Dallas, Perry	47 min
Mar 17, 4:12 PM CDT	Tornado Warning	BMX	Dallas	48 min
Mar 17, 4:28 PM CDT	Tornado Warning Tornado observed	BMX	Marengo	62 min
Mar 17, 4:36 PM CDT	Tornado Warning Tornado observed	BMX	Jefferson	54 min
Mar 17, 4:40 PM CDT	Tornado Warning	BMX	Autauga	50 min
Mar 17, 4:43 PM CDT	Tornado Warning	BMX	Dallas, Perry	47 min
Mar 17, 5:00 PM CDT	Tornado Warning	BMX	Chilton	60 min
Mar 17, 5:09 PM CDT	Areal Flood Advisory	BMX	Jefferson	111 min
Mar 17, 5:15 PM CDT	Tornado Warning	BMX	Chilton	60 min
Mar 17, 5:16 PM CDT	Tornado Warning Tornado observed	BMX	Blount	44 min
Mar 17, 5:23 PM CDT	Tornado Warning	BMX	Dallas, Marengo, Perry	67 min
Mar 17, 5:26 PM CDT	Areal Flood Advisory	BMX	Autauga, Chilton, Dallas, Hale, Marengo, Perry and 1 more	3 hr
Mar 17, 5:41 PM CDT	Tornado Warning	BMX	Marengo	23 min
Mar 17, 5:42 PM CDT	Tornado Warning	BMX	Chilton, Coosa, Shelby, Talladega	48 min
Mar 17, 5:48 PM CDT	Tornado Warning	BMX	Blount	42 min
Mar 17, 5:56 PM CDT	Areal Flood Advisory	BMX	Walker, Winston	44 min
Mar 17, 6:09 PM CDT	Tornado Warning	BMX	Chilton, Coosa, Shelby, Talladega	13 min
Mar 17, 6:40 PM CDT	Flash Flood Warning	BMX	Walker, Winston	3 hr
Mar 17, 6:48 PM CDT	Tornado Warning	BMX	Dallas	42 min

Nearby

Tornado Warnings in Alabama, 2021 Every tornado warning in 2021 Tornadoes in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.