Alert archive / Alabama / Tornado Warnings in 2018

Tornado Warning 2, NWS Mobile, AL

February 10, 2018Washington County, Alabama

NWS Mobile, AL issued this tornado warning at Feb 10, 2018, 5:10 PM CST for Washington County, Alabama. It was in force for 35 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: Feb 10, 2018, 5:10 PM CST (23:10 UTC)
Expired: Feb 10, 2018, 5:45 PM CST
In force: 35 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Washington County, AL

The radar

The Mobile radar (KMOB), 91 km from the middle of the area, began a volume at 23:10 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
Feb 10, 5:18 PM CST	TSTM WND DMG	7 W Chatom, AL	EMERGENCY MANAGER RELAYED A REPORT OF DAMAGE TO A RESIDENCE NEAR LATON HILL. TREES DOWN WITH ONE TREE THAT FELL IN A WINDOW, PART OF THE ROOF OF THE RESIDENCE SEVERELY DAMAGED AND A SHED BLOWN OVER. TIME ESTIMATED FROM RADAR.
Feb 10, 5:18 PM CST	TORNADO	8 W Chatom, AL	NWS SURVEY DETERMINED THAT A BRIEF EF-0 TORNADO TOUCHED DOWN JUST SOUTH OF HWY 56 AND EAST OF FLAT BRANCH RD. THE TORNADO RESULTED IN DAMAGE TO THE METAL ROOF OF A RESIDENCE ALONG WITH ONE WINDOW BLOWN OUT. SCATTERED SOFTWOOD TREE DAMAGE WAS NOTED ALONG THE SH

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

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 11.2 hours before the alert went out and 189 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: 121 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 443 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 272 m²/s²
0-3 km storm-relative helicity: 270 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted.

326 
WFUS54 KMOB 102310
TORMOB
ALC129-102345-
/O.NEW.KMOB.TO.W.0002.180210T2310Z-180210T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mobile AL
510 PM CST SAT FEB 10 2018

The National Weather Service in Mobile has issued a

* Tornado Warning for...
  Northwestern Washington County in southwestern Alabama...

* Until 545 PM CST
    
* At 509 PM CST, a severe thunderstorm capable of producing a 
  tornado was located 2 miles east of State Line, or 10 miles west 
  of Chatom, moving northeast at 30 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. 

* This tornadic thunderstorm will remain over mainly rural areas of
  northwestern Washington 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.

&&

LAT...LON 3152 8817 3139 8842 3141 8845 3146 8845
      3165 8835
TIME...MOT...LOC 2309Z 227DEG 25KT 3144 8843 

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

$$

1 follow-up statement

055 
WWUS54 KMOB 102328
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
528 PM CST SAT FEB 10 2018

ALC129-102345-
/O.CON.KMOB.TO.W.0002.000000T0000Z-180210T2345Z/
Washington AL-
528 PM CST SAT FEB 10 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM CST FOR
NORTHWESTERN WASHINGTON COUNTY...
    
At 527 PM CST, a severe thunderstorm capable of producing a tornado 
was located 5 miles northwest of Chatom, moving northeast at 30 mph. 
There is another circulation that is about to cross into the warning 
box south and southeast of State Line Mississippi near Yellow Pine. 

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. 

This tornadic thunderstorm will remain over mainly rural areas of
northwestern Washington 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.

&&

LAT...LON 3152 8817 3139 8842 3141 8845 3146 8845
      3165 8835
TIME...MOT...LOC 2327Z 227DEG 25KT 3153 8832 

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

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 9, 9:21 PM CST	Marine Dense Fog Advisory	MOB		13 hr
Feb 10, 7:44 AM CST	Special Weather Statement	MOB	Baldwin, Mobile	91 min
Feb 10, 11:20 AM CST	Special Marine Warning	MOB		40 min
Feb 10, 11:57 AM CST	Special Marine Warning	MOB		48 min
Feb 10, 12:36 PM CST	Special Marine Warning	MOB		54 min
Feb 10, 12:44 PM CST	Special Marine Warning	MOB		31 min
Feb 10, 12:56 PM CST	Tornado Warning	MOB	Baldwin	27 min
Feb 10, 1:00 PM CST	Special Weather Statement	MOB	Baldwin	30 min
Feb 10, 1:29 PM CST	Special Marine Warning	MOB		61 min
Feb 10, 2:17 PM CST	Special Weather Statement	MOB	Baldwin	43 min
Feb 10, 2:31 PM CST	Special Marine Warning	MOB		59 min
Feb 10, 2:50 PM CST	Special Marine Warning	MOB		55 min
Feb 10, 2:53 PM CST	Special Weather Statement	MOB	Baldwin, Escambia	52 min
Feb 10, 3:30 PM CST	Special Marine Warning	MOB		60 min
Feb 10, 3:33 PM CST	Special Weather Statement	MOB	Escambia	42 min
Feb 10, 4:10 PM CST	Special Weather Statement	MOB	Conecuh, Escambia	50 min
Feb 10, 4:30 PM CST	Special Marine Warning	MOB		60 min
Feb 10, 4:45 PM CST	Special Weather Statement	MOB	Washington	45 min
Feb 10, 4:48 PM CST	Marine Dense Fog Advisory	MOB		15 hr
Feb 10, 4:49 PM CST	Severe Thunderstorm Warning	MOB	Washington	41 min
Feb 10, 5:41 PM CST	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Washington	49 min

Nearby

Tornado Warnings in Alabama, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.