Alert archive / Alabama / Tornado Warnings in 2020

Tornado Warning 31, NWS Birmingham, AL

April 12, 2020Walker County, Winston County, Alabama

NWS Birmingham, AL issued this tornado warning at Apr 12, 2020, 8:15 PM CDT for Walker County, Winston County, Alabama. It was in force for 15 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Apr 12, 2020, 8:15 PM CDT (01:15 UTC)
Expired
Apr 12, 2020, 8:30 PM CDT
In force
15 min
Issued by
NWS Birmingham, AL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

Counties Walker County, AL, Winston County, AL

The radar

The Columbus AFB radar (KGWX), 92 km from the middle of the area, began a volume at 01:17 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.

What was reported inside it

TimeReportWhereRemark
Apr 12, 8:16 PM CDTTORNADO1 Ne Carbon Hill, ALTHE AREA OF GREATEST STRUCTURAL DAMAGE OCCURRED ALONG NAUVOO LANE WHERE AT LEAST 5 MANUFACTURED HOMES AND OUTBUILDINGS WERE EITHER ROLLED AND COMPLETELY DESTROYED, SHIFTED FROM BLOCK PIERS, OR SUFFERED SUBSTANTIAL LOSS OF ROOF AND WALLS. MAXIMUM ESTIMATED WIND

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 12, 3:20 PM CDTTornado WatchSPC8 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 1.3 hours before the alert went out and 107 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-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2020-04-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 533 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2020-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 401 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
533 J/kg
Mixed-layer CIN
-55 J/kg
Mixed-layer LCL
847 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
401 m²/s²
0-3 km storm-relative helicity
509 m²/s²
Significant tornado parameter
1.4
Supercell composite
8.4

Open this sounding in Storm Lab

The text

As transmitted.

337 
WFUS54 KBMX 130115
TORBMX
ALC127-133-130200-
/O.NEW.KBMX.TO.W.0031.200413T0115Z-200413T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Birmingham AL
815 PM CDT Sun Apr 12 2020

The National Weather Service in Birmingham has issued a

* Tornado Warning for...
  Northwestern Walker County in central Alabama...
  Eastern Winston County in northwestern Alabama...

* Until 900 PM CDT.
    
* At 815 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Carbon Hill, moving northeast at 40 mph.

  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...
  Carbon Hill, Arley, Addison, Kansas, Nauvoo, Camp McDowell,
  Nesmith, Ashbank, Poplar Springs, Helicon, Inmanfield, Sardis,
  Corinth Rec Area, Falls City, Smith Lake, Houston, Mill Branch,
  Hullett Branch, Winston County Airport and Cane Creek.

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 3406 8711 3383 8753 3387 8753 3387 8756
      3391 8760 3430 8718 3430 8711
TIME...MOT...LOC 0115Z 233DEG 36KT 3391 8751 

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

$$

17/KLAWS
2 follow-up statements
162 
WWUS54 KBMX 130118
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
818 PM CDT Sun Apr 12 2020

ALC127-133-130200-
/O.CON.KBMX.TO.W.0031.000000T0000Z-200413T0200Z/
Walker AL-Winston AL-
818 PM CDT Sun Apr 12 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR
NORTHWESTERN WALKER AND EASTERN WINSTON COUNTIES...
        
At 818 PM CDT, a confirmed tornado was located near Carbon Hill,
moving northeast at 40 mph.

HAZARD...Damaging tornado.

SOURCE...Radar confirmed tornado.

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...
Carbon Hill, Arley, Addison, Kansas, Nauvoo, Camp McDowell, Nesmith,
Poplar Springs, Helicon, Inmanfield, Sardis, Corinth Rec Area, Falls
City, Smith Lake, Houston, Mill Branch, Hullett Branch, Winston
County Airport, Cane Creek and Little Dismal Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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 3406 8711 3387 8747 3389 8755 3393 8756
      3430 8718 3430 8711
TIME...MOT...LOC 0118Z 233DEG 36KT 3393 8748 

TORNADO...OBSERVED
HAIL...<.75IN

$$

17/KLAWS
382 
WWUS54 KBMX 130130
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
830 PM CDT Sun Apr 12 2020

ALC127-133-130139-
/O.CAN.KBMX.TO.W.0031.000000T0000Z-200413T0200Z/
Walker AL-Winston AL-
830 PM CDT Sun Apr 12 2020

...THE TORNADO WARNING FOR NORTHWESTERN WALKER AND EASTERN WINSTON
COUNTIES IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has been 
cancelled.  However gusty winds are still possible with this 
thunderstorm.

A Tornado Watch remains in effect until 1000 PM CDT for central and
northwestern Alabama.

Remember, a Severe Thunderstorm Warning still remains in effect for
Walker County.

LAT...LON 3406 8711 3387 8747 3389 8755 3393 8756
      3430 8718 3430 8711
TIME...MOT...LOC 0128Z 233DEG 36KT 3400 8737 

$$

17/KLAWS

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 12, 7:10 PM CDTTornado WarningBMXGreene22 min
Apr 12, 7:14 PM CDTTornado WarningBMXSumter26 min
Apr 12, 7:16 PM CDTAreal Flood AdvisoryBMXCherokee, Etowah, St. Clair6 hr
Apr 12, 8:08 PM CDTSevere Thunderstorm WarningBMXFayette, Walker55 min
Apr 12, 8:14 PM CDTAreal Flood AdvisoryBMXFayette, Lamar, Marion, Walker, Winston5 hr
Apr 12, 8:25 PM CDTSevere Thunderstorm WarningBMXTuscaloosa38 min
Apr 12, 8:29 PM CDTFlash Flood WarningBMXFayette, Greene, Jefferson, Pickens, Sumter, Tuscaloosa and 1 more5 hr
Apr 12, 8:32 PM CDTTornado WarningBMXJefferson, Tuscaloosa21 min
Apr 12, 8:36 PM CDTSevere Thunderstorm WarningBMXBlount, Jefferson54 min
Apr 12, 8:36 PM CDTTornado Warning Tornado observedBMXJefferson, Tuscaloosa17 min
Apr 12, 8:49 PM CDTRiver Flood WarningBMXGreene, Hale, Marengo, Sumter5 days
Apr 12, 8:51 PM CDTSevere Thunderstorm WarningBMXJefferson39 min
Apr 12, 8:52 PM CDTRiver Flood WarningBMXJefferson, Tuscaloosa, Walker66 hr
Apr 12, 8:58 PM CDTRiver Flood WarningBMXGreene, Hale, Marengo, Tuscaloosa52 hr
Apr 12, 8:58 PM CDTRiver Flood WarningBMXGreene, Hale, Marengo, Sumter, Tuscaloosa61 hr
Apr 12, 9:12 PM CDTTornado WarningBMXBlount20 min
Apr 12, 9:19 PM CDTSevere Thunderstorm WarningBMXBlount, Etowah, Jefferson, St. Clair, Shelby71 min
Apr 12, 9:33 PM CDTTornado WarningBMXMarengo27 min
Apr 12, 10:02 PM CDTSevere Thunderstorm WarningBMXDallas27 min
Apr 12, 10:22 PM CDTFlash Flood WarningBMXBlount, Calhoun, Cherokee, Etowah, St. Clair4 hr
Apr 12, 10:24 PM CDTTornado WarningBMXCherokee36 min
Apr 12, 10:37 PM CDTSevere Thunderstorm WarningBMXLowndes, Montgomery53 min
Apr 12, 10:47 PM CDTSevere Thunderstorm WarningBMXCalhoun, Cherokee, Cleburne, Etowah58 min
Apr 12, 10:53 PM CDTSevere Thunderstorm WarningBMXAutauga, Elmore43 min
Apr 12, 10:59 PM CDTSevere Thunderstorm WarningBMXChilton, Clay, Coosa, Shelby, Talladega, Tallapoosa43 min
Apr 12, 11:01 PM CDTAreal Flood AdvisoryBMXGreene, Hale, Pickens, Sumter3 hr
Apr 12, 11:15 PM CDTSevere Thunderstorm WarningBMXBullock, Macon, Montgomery, Tallapoosa60 min
Apr 12, 11:16 PM CDTSpecial Weather StatementBMXFayette, Lamar, Marion74 min
Apr 12, 11:24 PM CDTAreal Flood WarningBMXFayette, Tuscaloosa, Walker6 hr
Apr 12, 11:30 PM CDTSevere Thunderstorm WarningBMXLee, Russell75 min
Apr 13, 12:08 AM CDTSpecial Weather StatementBMXBarbour, Bullock, Pike82 min
Apr 13, 12:11 AM CDTSevere Thunderstorm WarningBMXPike64 min
Apr 13, 12:13 AM CDTAreal Flood AdvisoryBMXLowndes, Montgomery3 hr
Apr 13, 12:18 AM CDTSevere Thunderstorm WarningBMXChambers16 min
Apr 13, 12:43 AM CDTSevere Thunderstorm WarningBMXBarbour, Bullock53 min
Apr 13, 1:04 AM CDTAreal Flood AdvisoryBMXBarbour, Bullock, Pike, Russell3 hr
Apr 13, 1:29 AM CDTHigh Wind WarningBMXAutauga, Calhoun, Chambers, Cherokee, Chilton, Clay and 10 more3 hr
Apr 13, 1:29 AM CDTWind AdvisoryBMXAutauga, Calhoun, Chambers, Cherokee, Chilton, Clay and 10 more7 hr
Apr 13, 2:25 AM CDTRiver Flood WarningBMXBibb, Jefferson, Shelby18 hr
Apr 13, 4:08 AM CDTAreal Flood WarningBMXCherokee12 hr
Apr 13, 7:43 AM CDTAreal Flood WarningBMXCherokee3 days

Nearby

Tornado Warnings in Alabama, 2020Every tornado warning in 2020Tornadoes in 2020

Sources

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