Alert archive / Alabama / Tornado Warnings in 2017

Tornado Warning 57, NWS Birmingham, AL

October 7, 2017Bibb County, Chilton County, Alabama

NWS Birmingham, AL issued this tornado warning at Oct 7, 2017, 8:36 PM CDT for Bibb County, Chilton County, Alabama. It was in force for 24 min. 2 reports 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: Oct 7, 2017, 8:36 PM CDT (01:36 UTC)
Expired: Oct 7, 2017, 9:00 PM CDT
In force: 24 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Bibb County, AL, Chilton County, AL

The radar

The Birmingham radar (KBMX), 38 km from the middle of the area, began a volume at 01:38 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

Time	Report	Where	Remark
Oct 7, 8:47 PM CDT	TORNADO	1 E Campbell, AL	BEGAN IN A WOODED AREA JUST WEST OF THE INTERSECTION OF CR-36 AND AL-191, WHERE IT SNAPPED SEVERAL BRANCHES OFF OF TREES. FROM THERE, THE TORNADO MOVED NORTH-NORTHWESTWARD, AND CONTINUED TO CAUSE DAMAGE TO TREES AS IT CROSSED CR-204 AND ACROSS A YARD AT THE EN
Oct 7, 8:47 PM CDT	TORNADO	1 Ene Campbell, AL	BEGAN IN A WOODED AREA JUST WEST OF THE INTERSECTION OF CR-36 AND AL-191, WHERE IT SNAPPED SEVERAL BRANCHES OFF OF TREES. FROM THERE, THE TORNADO MOVED NORTH-NORTHWESTWARD, AND CONTINUED TO CAUSE DAMAGE TO TREES AS IT CROSSED CR-204 AND ACROSS A YARD AT THE EN

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

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 1.6 hours before the alert went out and 39 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: 599 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 707 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 189 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 5.1

Open this sounding in Storm Lab

The text

As transmitted.

181 
WFUS54 KBMX 080136
TORBMX
ALC007-021-080200-
/O.NEW.KBMX.TO.W.0057.171008T0136Z-171008T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Birmingham AL
836 PM CDT SAT OCT 7 2017

The National Weather Service in Birmingham has issued a

* Tornado Warning for...
  Southwestern Chilton County in central Alabama...
  Southeastern Bibb County in central Alabama...

* Until 900 PM CDT
    
* At 836 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Maplesville, or 12 miles west of Clanton, moving
  northwest at 25 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...
  Maplesville, Lawley, Chilton County Motor Sports Park, Talladega
  National Forest, Randolph and Isabella.

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 3278 8676 3274 8685 3290 8702 3297 8683
TIME...MOT...LOC 0136Z 145DEG 21KT 3280 8684 

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

$$

25/Owen

2 follow-up statements

819 
WWUS54 KBMX 080145
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
845 PM CDT SAT OCT 7 2017

ALC007-021-080200-
/O.CON.KBMX.TO.W.0057.000000T0000Z-171008T0200Z/
Chilton AL-Bibb AL-
845 PM CDT SAT OCT 7 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR WEST
CENTRAL CHILTON AND SOUTHEASTERN BIBB COUNTIES...
    
At 845 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Chilton County Motor Sports Park, or 10 miles
southwest of Jemison, moving northwest at 25 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...
Maplesville, Lawley, Chilton County Motor Sports Park and Randolph. 

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3284 8678 3280 8687 3290 8702 3297 8683
TIME...MOT...LOC 0145Z 145DEG 21KT 3284 8688 

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

$$

25/Owen

506 
WWUS54 KBMX 080153
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
853 PM CDT SAT OCT 7 2017

ALC007-021-080200-
/O.CON.KBMX.TO.W.0057.000000T0000Z-171008T0200Z/
Chilton AL-Bibb AL-
853 PM CDT SAT OCT 7 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR WEST
CENTRAL CHILTON AND SOUTHEASTERN BIBB COUNTIES...
    
At 853 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Lawley, or 11 miles southwest of Jemison, moving
northwest at 25 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...
Chilton County Motor Sports Park and Randolph. 

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3288 8679 3283 8690 3293 8694 3297 8683
TIME...MOT...LOC 0153Z 145DEG 21KT 3288 8691 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

75

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 7, 7:23 PM CDT	Tornado Warning	BMX	Autauga, Lowndes	37 min
Oct 7, 8:01 PM CDT	Tornado Warning	BMX	Autauga, Chilton	29 min
Oct 7, 8:57 PM CDT	Tornado Warning	BMX	Bibb, Chilton, Shelby	33 min
Oct 7, 9:59 PM CDT	Areal Flood Advisory	BMX	Bibb, Shelby	3 hr
Oct 8, 4:47 AM CDT	Areal Flood Advisory	BMX	Autauga, Dallas, Lowndes	6 hr
Oct 8, 6:42 AM CDT	Areal Flood Advisory	BMX	Autauga, Chilton, Coosa, Elmore, Montgomery	3 hr
Oct 8, 8:38 AM CDT	Areal Flood Advisory	BMX	Barbour, Bullock, Chambers, Elmore, Lee, Macon and 3 more	3 hr

Nearby

Tornado Warnings in Alabama, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.