Alert archive / Alabama / Tornado Warnings in 2018

Tornado Warning 11, NWS Birmingham, AL

April 14, 2018Walker County, Winston County, Alabama

NWS Birmingham, AL issued this tornado warning at Apr 14, 2018, 12:34 PM CDT for Walker County, Winston County, Alabama. It was in force for 20 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: Apr 14, 2018, 12:34 PM CDT (17:34 UTC)
Expired: Apr 14, 2018, 12:54 PM CDT
In force: 20 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), 82 km from the middle of the area, began a volume at 17:37 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
Apr 14, 10:36 AM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 5.6 hours before the alert went out and 105 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: 224 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 560 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 275 m²/s²
0-3 km storm-relative helicity: 324 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

As transmitted.

005 
WFUS54 KBMX 141734
TORBMX
ALC127-133-141815-
/O.NEW.KBMX.TO.W.0011.180414T1734Z-180414T1815Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Birmingham AL
1234 PM CDT SAT APR 14 2018

The National Weather Service in Birmingham has issued a

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

* Until 115 PM CDT
    
* At 1234 PM CDT, a severe thunderstorm capable of producing a
  tornado was located near Nauvoo, or near Carbon Hill, moving
  northeast at 35 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, Kansas, Nauvoo, Poplar Springs, Camp McDowell, Smith
  Lake, Coon Creek, Lupton, Curtis Crossroads, Seymour Branch and
  Black Pond.

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 3387 8753 3393 8760 3410 8733 3395 8723
TIME...MOT...LOC 1734Z 240DEG 29KT 3394 8749 

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

$$

25/Owen

2 follow-up statements

349 
WWUS54 KBMX 141745
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
1245 PM CDT SAT APR 14 2018

ALC127-133-141815-
/O.CON.KBMX.TO.W.0011.000000T0000Z-180414T1815Z/
Walker AL-Winston AL-
1245 PM CDT SAT APR 14 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 115 PM CDT FOR NORTH
CENTRAL WALKER AND SOUTH CENTRAL WINSTON COUNTIES...
    
At 1245 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Camp McDowell, or 9 miles southeast of Lynn, moving
northeast at 35 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...
Nauvoo, Poplar Springs, Camp McDowell, Smith Lake, Coon Creek,
Lupton, Curtis Crossroads, Seymour Branch and Black Pond.

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 3391 8740 3400 8749 3410 8733 3395 8723
TIME...MOT...LOC 1745Z 240DEG 29KT 3399 8739 

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

$$

25/Owen

237 
WWUS54 KBMX 141754
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
1254 PM CDT SAT APR 14 2018

ALC127-133-141804-
/O.CAN.KBMX.TO.W.0011.000000T0000Z-180414T1815Z/
Walker AL-Winston AL-
1254 PM CDT SAT APR 14 2018

...THE TORNADO WARNING FOR NORTH CENTRAL WALKER AND SOUTH CENTRAL
WINSTON COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

A tornado watch remains in effect until 700 PM CDT for central
Alabama.

LAT...LON 3391 8740 3400 8749 3410 8733 3395 8723
TIME...MOT...LOC 1753Z 240DEG 29KT 3403 8731 

$$

25/Owen

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 14, 6:49 AM CDT	Severe Thunderstorm Warning	BMX	Marion	56 min
Apr 14, 7:37 AM CDT	Special Weather Statement	BMX	Marion	38 min
Apr 14, 10:57 AM CDT	Special Weather Statement	BMX	Pickens	78 min
Apr 14, 11:08 AM CDT	Severe Thunderstorm Warning	BMX	Lamar, Pickens	56 min
Apr 14, 11:22 AM CDT	Severe Thunderstorm Warning	BMX	Sumter	43 min
Apr 14, 11:36 AM CDT	Tornado Warning	BMX	Fayette, Lamar	24 min
Apr 14, 11:49 AM CDT	Areal Flood Advisory	BMX	Lamar, Marion	3 hr
Apr 14, 11:53 AM CDT	Severe Thunderstorm Warning	BMX	Fayette, Marion	52 min
Apr 14, 11:55 AM CDT	Severe Thunderstorm Warning	BMX	Greene, Pickens	65 min
Apr 14, 12:05 PM CDT	Tornado Warning	BMX	Greene, Pickens	25 min
Apr 14, 12:23 PM CDT	Special Weather Statement	BMX	Winston	37 min
Apr 14, 12:24 PM CDT	Severe Thunderstorm Warning	BMX	Tuscaloosa	81 min
Apr 14, 12:41 PM CDT	Tornado Warning	BMX	Tuscaloosa	13 min
Apr 14, 12:57 PM CDT	Special Weather Statement	BMX	Walker	63 min
Apr 14, 1:02 PM CDT	Special Weather Statement	BMX	Hale, Marengo	58 min
Apr 14, 1:07 PM CDT	Tornado Warning	BMX	Hale	16 min
Apr 14, 1:39 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Dallas, Hale, Marengo, Perry	41 min
Apr 14, 1:45 PM CDT	Special Weather Statement	BMX	Jefferson	60 min
Apr 14, 2:08 PM CDT	Special Weather Statement	BMX	Bibb, Dallas, Perry	67 min
Apr 14, 2:35 PM CDT	Areal Flood Advisory	BMX	Jefferson, Shelby	4 hr
Apr 14, 4:38 PM CDT	Special Weather Statement	BMX	Etowah	52 min
Apr 14, 5:33 PM CDT	Flash Flood Warning	BMX	Dallas, Marengo, Perry	4 hr
Apr 14, 6:07 PM CDT	Special Weather Statement	BMX	Clay, Talladega	38 min
Apr 14, 6:36 PM CDT	Special Weather Statement	BMX	Clay	24 min

Nearby

Tornado Warnings in Alabama, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.