Alert archive / Alabama / Tornado Warnings in 2018

Tornado Warning 4, NWS Tallahassee, FL

February 11, 2018Houston County, Alabama

NWS Tallahassee, FL issued this tornado warning at Feb 11, 2018, 3:46 AM CST for Houston County, Alabama. It was in force for 32 min. 1 report 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 11, 2018, 3:46 AM CST (09:46 UTC)
Expired: Feb 11, 2018, 4:18 AM CST
In force: 32 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Tornado: Observed
Hail: 0.75 in

County Houston County, AL

The radar

The Ft Rucker radar (KEOX), 49 km from the middle of the area, began a volume at 09:50 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 11, 4:15 AM CST	TSTM WND DMG	Pansey, AL	MINOR SHINGLE DAMAGE IN THE PANSEY AREA FROM THE SUNDAY MORNING STORMS.

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

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 9.8 hours before the alert went out and 112 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: 285 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 519 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 153 m²/s²
0-3 km storm-relative helicity: 171 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

611 
WFUS52 KTAE 110946
TORTAE
ALC069-111030-
/O.NEW.KTAE.TO.W.0004.180211T0946Z-180211T1030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Tallahassee FL
346 AM CST SUN FEB 11 2018

The National Weather Service in Tallahassee has issued a

* Tornado Warning for...
  Southeastern Houston County in southeastern Alabama...

* Until 430 AM CST
    
* At 346 AM CST, a tornado producing storm was located near
  Cottonwood, 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. 

* This tornadic storm will be near...
  Cottonwood around 355 AM CST. 
  Ashford around 410 AM CST. 

Other locations impacted by this tornadic thunderstorm include
Gordon, Pansey, Crosby, Grangeburg, Madrid, Lovetown, Farley Nuclear
Plant and Sealy Springs.

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 3125 8511 3123 8510 3120 8511 3117 8510
      3115 8507 3112 8506 3111 8503 3107 8503
      3105 8501 3104 8501 3100 8517 3100 8541
      3103 8544
TIME...MOT...LOC 0946Z 238DEG 25KT 3101 8536 

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

$$

42-DVD

2 follow-up statements

044 
WWUS52 KTAE 111004
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
404 AM CST SUN FEB 11 2018

ALC069-111030-
/O.CON.KTAE.TO.W.0004.000000T0000Z-180211T1030Z/
Houston AL-
404 AM CST SUN FEB 11 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 AM CST FOR
SOUTHEASTERN HOUSTON COUNTY...
    
At 404 AM CST, a severe thunderstorm capable of producing a tornado
was located near Cottonwood, 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 dangerous storm will be near...
  Ashford around 410 AM CST. 

Other locations impacted by this tornadic thunderstorm include
Gordon, Lovetown, Farley Nuclear Plant, Pansey and Crosby.

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 3125 8511 3123 8510 3120 8511 3117 8510
      3115 8507 3112 8506 3111 8503 3107 8503
      3105 8501 3104 8501 3100 8517 3103 8522
      3111 8532
TIME...MOT...LOC 1004Z 238DEG 25KT 3108 8523 

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

$$

42-DVD

861 
WWUS52 KTAE 111018
SVSTAE

Severe Weather Statement
National Weather Service Tallahassee FL
418 AM CST SUN FEB 11 2018

ALC069-111028-
/O.CAN.KTAE.TO.W.0004.000000T0000Z-180211T1030Z/
Houston AL-
418 AM CST SUN FEB 11 2018

...THE TORNADO WARNING FOR SOUTHEASTERN HOUSTON COUNTY 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.

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

LAT...LON 3125 8511 3123 8510 3120 8511 3117 8510
      3115 8507 3112 8506 3111 8503 3107 8503
      3105 8501 3104 8501 3100 8517 3103 8522
      3111 8532
TIME...MOT...LOC 1017Z 238DEG 25KT 3113 8513 

$$

42-DVD

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 11, 12:40 AM CST	Flood Watch	TAE	Coffee, Dale, Geneva, Henry, Houston	29 hr
Feb 11, 3:21 AM CST	Tornado Warning	TAE	Geneva, Houston	39 min
Feb 11, 7:42 AM CST	River Flood Warning	TAE	Dale	63 hr
Feb 11, 7:42 AM CST	River Flood Warning	TAE	Geneva	4 days

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.