Alert archive / Alabama / Tornado Warnings in 2017

Tornado Warning 28, NWS Birmingham, AL

April 27, 2017Barbour County, Bullock County, Alabama

NWS Birmingham, AL issued this tornado warning at Apr 27, 2017, 12:04 PM CDT for Barbour County, Bullock County, Alabama. It was in force for 41 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 27, 2017, 12:04 PM CDT (17:04 UTC)
Expired
Apr 27, 2017, 12:45 PM CDT
In force
41 min
Issued by
NWS Birmingham, AL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.0 in

Counties Barbour County, AL, Bullock County, AL

The radar

The Ft Rucker radar (KEOX), 58 km from the middle of the area, began a volume at 17:07 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 nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 5.1 hours before the alert went out and 177 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 12:00Z on 2017-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 277 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2017-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 square meters per square second.1939587897Sfc1 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
277 J/kg
Mixed-layer CIN
-112 J/kg
Mixed-layer LCL
741 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
186 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.5

Open this sounding in Storm Lab

The text

As transmitted.

502 
WFUS54 KBMX 271704
TORBMX
ALC005-011-271745-
/O.NEW.KBMX.TO.W.0028.170427T1704Z-170427T1745Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Birmingham AL
1204 PM CDT THU APR 27 2017

The National Weather Service in Birmingham has issued a

* Tornado Warning for...
  Southeastern Bullock County in southeastern Alabama...
  Northwestern Barbour County in southeastern Alabama...

* Until 1245 PM CDT
    
* At 1203 PM CDT, a severe thunderstorm capable of producing a
  tornado was located near Boot Hill, or 13 miles northeast of
  Brundidge, moving northeast at 30 mph.

  HAZARD...Tornado and quarter size hail. 

  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...
  Clayton, Comer, Barbour County Public Lake Dam, Tanyard and Mount
  Andrew.

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 3188 8566 3188 8572 3190 8573 3196 8566
      3204 8545 3214 8543 3215 8541 3214 8540
      3192 8527 3189 8561
TIME...MOT...LOC 1703Z 243DEG 28KT 3190 8570 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

61
1 follow-up statement
128 
WWUS54 KBMX 271745
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
1245 PM CDT THU APR 27 2017

ALC005-011-271755-
/O.EXP.KBMX.TO.W.0028.000000T0000Z-170427T1745Z/
Bullock AL-Barbour AL-
1245 PM CDT THU APR 27 2017

...THE TORNADO WARNING FOR SOUTHEASTERN BULLOCK AND NORTHWESTERN
BARBOUR COUNTIES HAS EXPIRED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been allowed to expire.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Birmingham.

LAT...LON 3188 8566 3188 8572 3190 8573 3196 8566
      3204 8545 3214 8543 3215 8541 3214 8540
      3192 8527 3189 8561
TIME...MOT...LOC 1745Z 243DEG 28KT 3204 8537 

$$

61

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 27, 12:06 AM CDTSevere Thunderstorm WarningBMXSumter39 min
Apr 27, 12:07 AM CDTTornado WarningBMXPickens25 min
Apr 27, 12:33 AM CDTSevere Thunderstorm WarningBMXGreene42 min
Apr 27, 12:56 AM CDTSevere Thunderstorm WarningBMXSumter49 min
Apr 27, 6:13 AM CDTTornado WarningBMXLowndes13 min
Apr 27, 8:41 AM CDTSpecial Weather StatementBMXTallapoosa34 min
Apr 27, 9:09 AM CDTTornado WarningBMXBullock, Montgomery20 min
Apr 27, 11:21 AM CDTTornado WarningBMXPike24 min
Apr 27, 11:31 AM CDTTornado WarningBMXLee, Russell14 min
Apr 27, 11:40 AM CDTTornado Warning Tornado observedBMXBullock36 min
Apr 27, 11:58 AM CDTTornado WarningBMXRussell27 min

Nearby

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