Alert archive / Alabama / Tornado Warnings in 2017

Tornado Warning 20, NWS Mobile, AL

April 3, 2017Crenshaw County, Alabama

NWS Mobile, AL issued this tornado warning at Apr 3, 2017, 8:54 AM CDT for Crenshaw County, Alabama. It was in force for 13 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: Apr 3, 2017, 8:54 AM CDT (13:54 UTC)
Expired: Apr 3, 2017, 9:07 AM CDT
In force: 13 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Crenshaw County, AL

The radar

The Ft Rucker radar (KEOX), 85 km from the middle of the area, began a volume at 13:56 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
Apr 3, 8:56 AM CDT	TSTM WND DMG	Luverne, AL	ROOF RIPPED OFF OF A WAREHOUSE. MULTIPLE POWER LINES AND POWER POLES DOWN NEAR THE LUVERNE HIGH SCHOOL.
Apr 3, 8:56 AM CDT	TSTM WND DMG	Luverne, AL	SEVERAL STRUCTURES WITH ROOF DAMAGE IN LUVERNE ALONG WITH NUMEROUS TREES AND POWER LINES DOWN. POSSIBLE TORNADO.

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

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 3, 7:06 AM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 1.9 hours before the alert went out and 236 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: 26 J/kg
Mixed-layer CIN: -350 J/kg
Mixed-layer LCL: 987 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 317 m²/s²
0-3 km storm-relative helicity: 392 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

466 
WFUS54 KMOB 031354
TORMOB
ALC041-031430-
/O.NEW.KMOB.TO.W.0020.170403T1354Z-170403T1430Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mobile AL
854 AM CDT MON APR 3 2017

The National Weather Service in Mobile has issued a

* Tornado Warning for...
  Northern Crenshaw County in south central Alabama...

* Until 930 AM CDT
    
* At 854 AM CDT, a severe thunderstorm capable of producing a tornado
  was located over Petrey, or 10 miles north of Luverne, moving
  northeast at 45 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. 

* This tornadic thunderstorm will remain over mainly rural areas of
  northern Crenshaw County.

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.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 3168 8627 3185 8645 3188 8645 3197 8630
      3196 8619 3193 8618 3189 8617 3186 8618
      3183 8618 3181 8620 3179 8620 3179 8615
      3175 8615
TIME...MOT...LOC 1354Z 241DEG 41KT 3187 8624 

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

$$

1 follow-up statement

678 
WWUS54 KMOB 031407
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
907 AM CDT MON APR 3 2017

ALC041-031417-
/O.CAN.KMOB.TO.W.0020.000000T0000Z-170403T1430Z/
Crenshaw AL-
907 AM CDT MON APR 3 2017

...THE TORNADO WARNING FOR NORTHERN CRENSHAW COUNTY IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning has been cancelled.

A tornado watch remains in effect until 100 PM CDT for south central
Alabama.

LAT...LON 3168 8627 3185 8645 3188 8645 3197 8630
      3196 8619 3193 8618 3189 8617 3186 8618
      3183 8618 3181 8620 3179 8620 3179 8615
      3175 8615
TIME...MOT...LOC 1405Z 241DEG 41KT 3194 8608 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 3:29 AM CDT	Special Weather Statement	MOB	Choctaw	46 min
Apr 3, 3:41 AM CDT	Severe Thunderstorm Warning	MOB	Choctaw	49 min
Apr 3, 5:10 AM CDT	Severe Thunderstorm Warning	MOB	Washington	50 min
Apr 3, 5:45 AM CDT	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Washington	45 min
Apr 3, 5:57 AM CDT	Severe Thunderstorm Warning	MOB	Clarke, Mobile, Washington	48 min
Apr 3, 6:28 AM CDT	Severe Thunderstorm Warning	MOB	Clarke, Washington	47 min
Apr 3, 6:43 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Clarke, Escambia, Mobile, Monroe, Washington	47 min
Apr 3, 6:53 AM CDT	Special Marine Warning	MOB		97 min
Apr 3, 7:26 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Butler, Clarke, Conecuh, Escambia, Mobile and 2 more	49 min
Apr 3, 7:27 AM CDT	Areal Flood Advisory	MOB	Baldwin, Mobile	3 hr
Apr 3, 7:45 AM CDT	Special Weather Statement	MOB	Baldwin, Covington, Escambia	45 min
Apr 3, 7:53 AM CDT	Flash Flood Watch	MOB	Baldwin, Conecuh, Covington, Escambia, Mobile	4 hr
Apr 3, 7:55 AM CDT	Flash Flood Warning	MOB	Mobile	4 hr
Apr 3, 8:09 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Conecuh, Covington, Escambia, Mobile	51 min
Apr 3, 8:26 AM CDT	Special Marine Warning	MOB		94 min
Apr 3, 8:26 AM CDT	Severe Thunderstorm Warning	MOB	Butler, Conecuh, Covington, Crenshaw, Escambia	64 min
Apr 3, 8:49 AM CDT	Special Marine Warning	MOB		56 min
Apr 3, 8:54 AM CDT	Flash Flood Warning	MOB	Baldwin	4 hr
Apr 3, 8:59 AM CDT	Special Marine Warning	MOB		61 min
Apr 3, 9:00 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Escambia, Mobile	60 min
Apr 3, 9:33 AM CDT	Areal Flood Advisory	MOB	Baldwin	3 hr
Apr 3, 9:33 AM CDT	Special Marine Warning	MOB		87 min
Apr 3, 9:36 AM CDT	Severe Thunderstorm Warning	MOB	Conecuh, Covington	39 min
Apr 3, 9:43 AM CDT	River Flood Warning	MOB	Choctaw, Clarke, Washington	8 days
Apr 3, 9:43 AM CDT	River Flood Warning	MOB	Choctaw, Clarke, Washington	9 days
Apr 3, 9:43 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin	62 min
Apr 3, 10:02 AM CDT	Special Marine Warning	MOB		58 min
Apr 3, 10:46 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin	45 min
Apr 3, 10:55 AM CDT	Special Marine Warning	MOB		2 hr
Apr 3, 12:54 PM CDT	Special Marine Warning	MOB		66 min
Apr 3, 1:55 PM CDT	Special Marine Warning	MOB		2 hr
Apr 3, 3:51 PM CDT	Special Marine Warning	MOB		114 min
Apr 3, 5:38 PM CDT	Special Marine Warning	MOB		67 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.