Alert archive / Florida / Tornado Warnings in 2018

Tornado Warning 16, NWS Mobile, AL

September 4, 2018Santa Rosa County, Florida

NWS Mobile, AL issued this tornado warning at Sep 4, 2018, 9:55 PM CDT for Santa Rosa County, Florida. It was in force for 27 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: Sep 4, 2018, 9:55 PM CDT (02:55 UTC)
Expired: Sep 4, 2018, 10:22 PM CDT
In force: 27 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Tornado: Observed
Hail: 0.0 in

County Santa Rosa County, FL

The radar

The Mobile radar (KMOB), 95 km from the middle of the area, began a volume at 02:59 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 4, 6:51 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 2.9 hours before the alert went out and 242 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: 32 J/kg
Mixed-layer CIN: -118 J/kg
Mixed-layer LCL: 1016 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -73 m²/s²
0-3 km storm-relative helicity: -21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

720 
WFUS54 KMOB 050255
TORMOB
FLC113-050345-
/O.NEW.KMOB.TO.W.0016.180905T0255Z-180905T0345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mobile AL
955 PM CDT TUE SEP 4 2018

The National Weather Service in Mobile has issued a

* Tornado Warning for...
  Northwestern Santa Rosa County in northwestern Florida...

* Until 1045 PM CDT.

* At 955 PM CDT, a confirmed tornado was located over Pea Ridge, or
  near Milton, moving northwest at 25 mph.

  HAZARD...Damaging tornado.

  SOURCE...ASOS contract observer 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 thunderstorm will remain over mainly rural areas of
  northwestern Santa Rosa County.

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 3070 8727 3071 8727 3072 8730 3073 8731
      3079 8731 3081 8729 3084 8731 3086 8731
      3089 8728 3093 8728 3094 8727 3093 8726
      3095 8724 3062 8699 3056 8710
TIME...MOT...LOC 0255Z 141DEG 23KT 3063 8710 

TORNADO...OBSERVED
HAIL...0.00IN

$$

1 follow-up statement

513 
WWUS54 KMOB 050322
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
1022 PM CDT TUE SEP 4 2018

FLC113-050331-
/O.CAN.KMOB.TO.W.0016.000000T0000Z-180905T0345Z/
Santa Rosa FL-
1022 PM CDT TUE SEP 4 2018

...THE TORNADO WARNING FOR NORTHWESTERN SANTA ROSA COUNTY IS
CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

A Tornado Watch remains in effect until 400 AM CDT for northwestern
Florida.

LAT...LON 3070 8727 3071 8727 3072 8730 3073 8731
      3079 8731 3081 8729 3084 8731 3086 8731
      3089 8728 3093 8728 3094 8727 3093 8726
      3095 8724 3062 8699 3056 8710
TIME...MOT...LOC 0320Z 141DEG 23KT 3076 8723 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 8:24 PM CDT	Flash Flood Warning	MOB	Escambia, Santa Rosa	12 hr
Sep 4, 8:31 PM CDT	River Flood Warning	MOB	Escambia	4 days
Sep 4, 9:29 PM CDT	Tornado Warning	MOB	Escambia, Santa Rosa	31 min
Sep 4, 10:45 PM CDT	Flash Flood Warning	MOB	Escambia, Santa Rosa	12 hr
Sep 5, 3:10 AM CDT	Tornado Warning	MOB	Okaloosa, Santa Rosa	29 min
Sep 5, 3:31 AM CDT	Tornado Warning	MOB	Okaloosa	19 min
Sep 5, 5:15 AM CDT	Coastal Flood Advisory	MOB	Escambia, Santa Rosa	9 hr
Sep 5, 5:15 AM CDT	High Surf Advisory	MOB	Escambia, Santa Rosa	9 hr
Sep 5, 7:54 AM CDT	Flash Flood Warning	MOB	Escambia, Santa Rosa	6 hr
Sep 5, 9:57 AM CDT	Flash Flood Warning	MOB	Okaloosa, Santa Rosa	6 hr
Sep 5, 1:50 PM CDT	Areal Flood Warning	MOB	Escambia, Santa Rosa	6 hr

Nearby

Tornado Warnings in Florida, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.