Alert archive / Florida / Tornado Warnings in 2019

Tornado Warning 54, NWS Mobile, AL

December 17, 2019Escambia County, Santa Rosa County, Florida

NWS Mobile, AL issued this tornado warning at Dec 17, 2019, 1:15 AM CST for Escambia County, Santa Rosa County, Florida. It was in force for 30 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: Dec 17, 2019, 1:15 AM CST (07:15 UTC)
Expired: Dec 17, 2019, 1:45 AM CST
In force: 30 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Escambia County, FL, Santa Rosa County, FL

The radar

The Mobile radar (KMOB), 112 km from the middle of the area, began a volume at 07:18 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 00:00Z, 7.3 hours before the alert went out and 247 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: 1447 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 560 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 263 m²/s²
0-3 km storm-relative helicity: 281 m²/s²
Significant tornado parameter: 2.5
Supercell composite: 10.9

Open this sounding in Storm Lab

The text

As transmitted.

486 
WFUS54 KMOB 170715
TORMOB
FLC033-113-170745-
/O.NEW.KMOB.TO.W.0054.191217T0715Z-191217T0745Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mobile AL
115 AM CST Tue Dec 17 2019

The National Weather Service in Mobile has issued a

* Tornado Warning for...
  South central Santa Rosa County in northwestern Florida...
  South central Escambia County in northwestern Florida...

* Until 145 AM CST.
    
* At 115 AM CST, a severe thunderstorm capable of producing a tornado
  was located over Gulf Breeze, moving northeast at 25 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...
  Gulf Breeze and Pensacola Beach around 120 AM CST.
  Oriole Beach around 130 AM CST.

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 3027 8716 3030 8728 3052 8713 3046 8692
TIME...MOT...LOC 0715Z 214DEG 21KT 3032 8719 

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

$$

JLH

1 follow-up statement

593 
WWUS54 KMOB 170744
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
144 AM CST Tue Dec 17 2019

FLC033-113-170754-
/O.EXP.KMOB.TO.W.0054.000000T0000Z-191217T0745Z/
Santa Rosa FL-Escambia FL-
144 AM CST Tue Dec 17 2019

...THE TORNADO WARNING FOR SOUTH CENTRAL SANTA ROSA AND SOUTH CENTRAL
ESCAMBIA COUNTIES WILL EXPIRE AT 145 AM CST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.

LAT...LON 3027 8716 3030 8728 3052 8713 3046 8692
TIME...MOT...LOC 0744Z 214DEG 21KT 3048 8706 

$$

JLH

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 17, 1:05 AM CST	Special Weather Statement	MOB	Escambia	25 min
Dec 17, 1:27 AM CST	Severe Thunderstorm Warning	MOB	Okaloosa	48 min
Dec 17, 2:43 AM CST	Special Weather Statement	MOB	Santa Rosa	32 min
Dec 17, 3:09 AM CST	Tornado Warning	MOB	Okaloosa	21 min
Dec 17, 3:14 AM CST	Tornado Warning	MOB	Okaloosa, Santa Rosa	61 min
Dec 17, 4:58 AM CST	Tornado Warning	MOB	Okaloosa	14 min

Nearby

Tornado Warnings in Florida, 2019 Every tornado warning in 2019 Tornadoes in 2019

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.