Alert archive / Alabama / Tornado Warnings in 2017

Tornado Warning 56, NWS Mobile, AL

October 7, 2017Baldwin County, Mobile County, Washington County, Alabama

NWS Mobile, AL issued this tornado warning at Oct 7, 2017, 6:27 PM CDT for Baldwin County, Mobile County, Washington County, Alabama. It was in force for 33 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
Oct 7, 2017, 6:27 PM CDT (23:27 UTC)
Expired
Oct 7, 2017, 7:00 PM CDT
In force
33 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

Counties Baldwin County, AL, Mobile County, AL, Washington County, AL

The radar

The Mobile radar (KMOB), 48 km from the middle of the area, began a volume at 23:31 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.5 hours before the alert went out and 169 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, Slidell Radar S, LA at 12:00Z on 2017-10-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1577 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2017-10-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 190 square meters per square second.193958Sfc1 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
1577 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
467 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
190 m²/s²
0-3 km storm-relative helicity
251 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

755 
WFUS54 KMOB 072327
TORMOB
ALC003-097-129-080015-
/O.NEW.KMOB.TO.W.0056.171007T2327Z-171008T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mobile AL
627 PM CDT SAT OCT 7 2017

The National Weather Service in Mobile has issued a

* Tornado Warning for...
  Northeastern Mobile County in southwestern Alabama...
  Northwestern Baldwin County in southwestern Alabama...
  Southwestern Washington County in southwestern Alabama...

* Until 715 PM CDT
    
* At 626 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Axis, or over Creola, moving northwest at 35 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...
  Movico around 640 PM CDT. 
  Citronelle around 655 PM CDT. 
  Deer Park around 715 PM CDT. 

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 3117 8844 3124 8844 3137 8823 3090 8791
      3083 8803
TIME...MOT...LOC 2326Z 142DEG 31KT 3092 8802 

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

$$
1 follow-up statement
513 
WWUS54 KMOB 080000
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
700 PM CDT SAT OCT 7 2017

ALC003-097-129-080010-
/O.CAN.KMOB.TO.W.0056.000000T0000Z-171008T0015Z/
Mobile AL-Baldwin AL-Washington AL-
700 PM CDT SAT OCT 7 2017

...THE TORNADO WARNING FOR NORTHEASTERN MOBILE...NORTHWESTERN BALDWIN
AND SOUTHWESTERN WASHINGTON COUNTIES 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.

LAT...LON 3117 8844 3124 8844 3137 8823 3090 8791
      3083 8803
TIME...MOT...LOC 2357Z 142DEG 31KT 3115 8823 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 6, 9:36 PM CDTRiver Flood WarningMOBBaldwin3 days
Oct 6, 9:39 PM CDTRiver Flood WarningMOBBaldwin66 hr
Oct 7, 9:29 AM CDTRiver Flood WarningMOBBaldwin60 hr
Oct 7, 1:36 PM CDTSpecial Marine WarningMOB39 min
Oct 7, 1:46 PM CDTTornado WarningMOBBaldwin29 min
Oct 7, 2:40 PM CDTSpecial Weather StatementMOBBaldwin35 min
Oct 7, 6:03 PM CDTSpecial Marine WarningMOB42 min
Oct 7, 6:17 PM CDTTornado WarningMOBBaldwin43 min
Oct 7, 6:31 PM CDTSpecial Marine WarningMOB59 min
Oct 7, 6:43 PM CDTTornado WarningMOBBaldwin16 min
Oct 7, 6:57 PM CDTSpecial Marine WarningMOB48 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.