Alert archive / Alabama / Tornado Warnings in 2017

Tornado Warning 25, NWS Birmingham, AL

April 27, 2017Lee County, Russell County, Alabama

NWS Birmingham, AL issued this tornado warning at Apr 27, 2017, 11:31 AM CDT for Lee County, Russell County, Alabama. It was in force for 14 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, 11:31 AM CDT (16:31 UTC)
Expired: Apr 27, 2017, 11:45 AM CDT
In force: 14 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Lee County, AL, Russell County, AL

The radar

The Maxwell AFB radar (KMXX), 72 km from the middle of the area, began a volume at 16:35 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 4.5 hours before the alert went out and 110 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: 45 J/kg
Mixed-layer CIN: -363 J/kg
Mixed-layer LCL: 703 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 351 m²/s²
0-3 km storm-relative helicity: 395 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

403 
WFUS54 KBMX 271631
TORBMX
ALC081-113-271645-
/O.NEW.KBMX.TO.W.0025.170427T1631Z-170427T1645Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Birmingham AL
1131 AM CDT THU APR 27 2017

The National Weather Service in Birmingham has issued a

* Tornado Warning for...
  East central Lee County in east central Alabama...
  North central Russell County in southeastern Alabama...

* Until 1145 AM CDT
    
* At 1131 AM CDT, a severe thunderstorm capable of producing a
  tornado was located over Ladonia, or near Phenix City, moving east
  at 45 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...
  Phenix City, Smiths, Smiths Station, Ladonia, Monterey Heights and
  Ladonia Sports Complex.

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 3244 8498 3245 8509 3252 8513 3257 8505
      3251 8500 3248 8499 3247 8500 3246 8500
TIME...MOT...LOC 1631Z 250DEG 39KT 3248 8507 

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

$$

61

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 12:06 AM CDT	Severe Thunderstorm Warning	BMX	Sumter	39 min
Apr 27, 12:07 AM CDT	Tornado Warning	BMX	Pickens	25 min
Apr 27, 12:33 AM CDT	Severe Thunderstorm Warning	BMX	Greene	42 min
Apr 27, 12:56 AM CDT	Severe Thunderstorm Warning	BMX	Sumter	49 min
Apr 27, 6:13 AM CDT	Tornado Warning	BMX	Lowndes	13 min
Apr 27, 8:41 AM CDT	Special Weather Statement	BMX	Tallapoosa	34 min
Apr 27, 9:09 AM CDT	Tornado Warning	BMX	Bullock, Montgomery	20 min
Apr 27, 11:21 AM CDT	Tornado Warning	BMX	Pike	24 min
Apr 27, 11:40 AM CDT	Tornado Warning Tornado observed	BMX	Bullock	36 min
Apr 27, 11:58 AM CDT	Tornado Warning	BMX	Russell	27 min
Apr 27, 12:04 PM CDT	Tornado Warning	BMX	Barbour, Bullock	41 min

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.