Alert archive / Alabama / Tornado Warnings in 2017

Tornado Warning 40, NWS Birmingham, AL

June 22, 2017Jefferson County, Shelby County, Alabama

NWS Birmingham, AL issued this tornado warning at Jun 22, 2017, 2:43 PM CDT for Jefferson County, Shelby County, Alabama. It was in force for 12 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: Jun 22, 2017, 2:43 PM CDT (19:43 UTC)
Expired: Jun 22, 2017, 2:55 PM CDT
In force: 12 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Tornado: Observed
Hail: 0.75 in

Counties Jefferson County, AL, Shelby County, AL

The radar

The Birmingham radar (KBMX), 16 km from the middle of the area, began a volume at 19:48 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
Jun 22, 1:04 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 7.7 hours before the alert went out and 15 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: 602 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 450 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 306 m²/s²
0-3 km storm-relative helicity: 324 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 6.5

Open this sounding in Storm Lab

The text

As transmitted.

237 
WFUS54 KBMX 221943
TORBMX
ALC073-117-222030-
/O.NEW.KBMX.TO.W.0040.170622T1943Z-170622T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Birmingham AL
243 PM CDT THU JUN 22 2017

The National Weather Service in Birmingham has issued a

* Tornado Warning for...
  West central Shelby County in Alabama...
  South central Jefferson County in Alabama...

* Until 330 PM CDT
    
* At 243 PM CDT, a tornado producing storm was located near Maylene,
  or 8 miles northwest of Montevallo, moving northeast at 30 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...
  Hoover, Alabaster, Bessemer, Pelham, Helena, Regions Park Or Hoover
  Met, Oak Mountain Amphitheater, Joe Tucker Park, Bessemer Airport
  and Lake Cyrus.

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 3333 8677 3313 8697 3316 8697 3316 8700
      3317 8700 3317 8703 3339 8694
TIME...MOT...LOC 1943Z 211DEG 26KT 3319 8697 

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

$$

89^GSatterwhite

2 follow-up statements

394 
WWUS54 KBMX 221951
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
251 PM CDT THU JUN 22 2017

ALC073-117-222030-
/O.CON.KBMX.TO.W.0040.000000T0000Z-170622T2030Z/
Shelby AL-Jefferson AL-
251 PM CDT THU JUN 22 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 330 PM CDT FOR WEST
CENTRAL SHELBY AND SOUTH CENTRAL JEFFERSON COUNTIES...
    
At 250 PM CDT, a severe thunderstorm capable of producing a tornado 
was located near Helena, moving northeast at 30 mph. This storm 
produced a brief tornado earlier.

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...
Hoover, Bessemer, Pelham, Helena, Regions Park Or Hoover Met, Oak
Mountain Amphitheater, Joe Tucker Park, Bessemer Airport and Lake
Cyrus.

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 3333 8677 3320 8695 3321 8700 3339 8694
TIME...MOT...LOC 1950Z 207DEG 28KT 3327 8694 

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

$$

89^GSatterwhite

877 
WWUS54 KBMX 221955
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
255 PM CDT THU JUN 22 2017

ALC073-117-222005-
/O.CAN.KBMX.TO.W.0040.000000T0000Z-170622T2030Z/
Shelby AL-Jefferson AL-
255 PM CDT THU JUN 22 2017

...THE TORNADO WARNING FOR WEST CENTRAL SHELBY AND SOUTH CENTRAL
JEFFERSON 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.

A tornado watch remains in effect until 1000 PM CDT for Alabama.

LAT...LON 3333 8677 3320 8695 3321 8700 3339 8694
TIME...MOT...LOC 1953Z 211DEG 26KT 3330 8692 

$$

89^GSatterwhite

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 11:27 PM CDT	Areal Flood Advisory	BMX	Lowndes	3 hr
Jun 22, 4:32 AM CDT	Flash Flood Warning	BMX	Lowndes	6 hr
Jun 22, 5:38 AM CDT	Areal Flood Advisory	BMX	Montgomery	4 hr
Jun 22, 8:37 AM CDT	Areal Flood Advisory	BMX	Greene, Hale, Marengo, Pickens, Sumter	3 hr
Jun 22, 10:23 AM CDT	Areal Flood Advisory	BMX	Bibb, Perry, Tuscaloosa	3 hr
Jun 22, 10:29 AM CDT	Areal Flood Warning	BMX	Autauga, Lowndes	3 hr
Jun 22, 11:28 AM CDT	Areal Flood Advisory	BMX	Greene, Hale, Marengo	3 hr
Jun 22, 11:36 AM CDT	Areal Flood Advisory	BMX	Jefferson, Walker	3 hr
Jun 22, 12:27 PM CDT	Tornado Warning	BMX	Jefferson	33 min
Jun 22, 12:42 PM CDT	Tornado Warning Tornado observed	BMX	Jefferson	11 min
Jun 22, 12:49 PM CDT	Areal Flood Advisory	BMX	Jefferson, St. Clair, Shelby	3 hr
Jun 22, 12:55 PM CDT	Tornado Warning	BMX	Bibb, Tuscaloosa	38 min
Jun 22, 1:20 PM CDT	Tornado Warning	BMX	Jefferson	10 min
Jun 22, 1:44 PM CDT	Areal Flood Advisory	BMX	Bibb, Perry	3 hr
Jun 22, 2:29 PM CDT	Areal Flood Advisory	BMX	Bibb, Jefferson, Tuscaloosa	3 hr
Jun 22, 2:56 PM CDT	Tornado Warning	BMX	Clay, Tallapoosa	22 min
Jun 22, 3:13 PM CDT	Areal Flood Advisory	BMX	Autauga, Elmore, Lowndes, Montgomery	2 hr
Jun 22, 3:38 PM CDT	Tornado Warning	BMX	Tallapoosa	41 min
Jun 22, 3:54 PM CDT	Areal Flood Warning	BMX	Autauga, Bibb, Chilton, Coosa, Elmore, Lowndes and 1 more	3 hr
Jun 22, 3:58 PM CDT	Areal Flood Warning	BMX	Bibb, Blount, Jefferson, St. Clair, Shelby, Talladega and 2 more	3 hr
Jun 22, 4:19 PM CDT	Areal Flood Warning	BMX	Dallas, Greene, Hale, Marengo, Perry	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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.