Alert archive / Florida / Tornado Warnings in 2020

Tornado Warning 57, NWS Mobile, AL

September 15, 2020Escambia County, Santa Rosa County, Florida

NWS Mobile, AL issued this tornado warning at Sep 15, 2020, 11:36 PM CDT for Escambia County, Santa Rosa County, Florida. It was in force for 28 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 15, 2020, 11:36 PM CDT (04:36 UTC)
Expired
Sep 16, 2020, 12:04 AM CDT
In force
28 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Escambia County, FL, Santa Rosa County, FL

The radar

The Eglin Afb radar (KEVX), 99 km from the middle of the area, began a volume at 04:38 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.

IssuedProductOfficeLasted
Sep 15, 5:48 PM CDTTornado WatchSPC12 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 4.6 hours before the alert went out and 253 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, Tallahassee Rgnl, FL at 00:00Z on 2020-09-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 929 joules per kilogram.LCLEL10008507005003002001001 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, Tallahassee Rgnl, FL at 00:00Z on 2020-09-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 181 square meters per square second.1939Sfc1 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
929 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
520 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
181 m²/s²
0-3 km storm-relative helicity
228 m²/s²
Significant tornado parameter
0.7
Supercell composite
6.1

Open this sounding in Storm Lab

The text

As transmitted.

692 
WFUS54 KMOB 160436
TORMOB
FLC033-113-160515-
/O.NEW.KMOB.TO.W.0057.200916T0436Z-200916T0515Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mobile AL
1136 PM CDT Tue Sep 15 2020

The National Weather Service in Mobile has issued a

* Tornado Warning for...
  Southern Santa Rosa County in northwestern Florida...
  Southeastern Escambia County in northwestern Florida...

* Until 1215 AM CDT.
    
* At 1136 PM CDT, a severe thunderstorm capable of producing a
  tornado was located 4 miles southwest of Navarre Beach, or 15 miles
  west of Mary Esther, moving northwest at 55 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...
  Navarre around 1140 PM CDT.
  Oriole Beach around 1145 PM CDT.
  Ferry Pass, Brent, Pace, Floridatown and Pea Ridge around 1200 AM 
  CDT.
  Ensley and Gonzalez around 1205 AM 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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 3058 8739 3072 8714 3042 8680 3041 8680
      3040 8679 3041 8678 3040 8677 3039 8680
      3039 8676 3026 8695
TIME...MOT...LOC 0436Z 132DEG 48KT 3034 8690 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$
1 follow-up statement
984 
WWUS54 KMOB 160504
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
1204 AM CDT Wed Sep 16 2020

FLC033-113-160514-
/O.CAN.KMOB.TO.W.0057.000000T0000Z-200916T0515Z/
Santa Rosa FL-Escambia FL-
1204 AM CDT Wed Sep 16 2020

...THE TORNADO WARNING FOR SOUTHERN SANTA ROSA AND SOUTHEASTERN
ESCAMBIA 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.

A Tornado Watch remains in effect until 600 AM CDT for northwestern
Florida.

LAT...LON 3058 8739 3072 8714 3042 8680 3041 8680
      3040 8679 3041 8678 3040 8677 3039 8680
      3039 8676 3026 8695
TIME...MOT...LOC 0501Z 132DEG 48KT 3059 8722 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 15, 9:54 PM CDTAreal Flood AdvisoryMOBEscambia, Okaloosa, Santa Rosa6 hr
Sep 15, 10:53 PM CDTRiver Flood WarningMOBOkaloosa, Santa Rosa5 days
Sep 15, 11:00 PM CDTFlash Flood Warning Considerable damage threatMOBEscambia, Okaloosa, Santa Rosa8 hr
Sep 16, 1:03 AM CDTFlash Flood Warning EmergencyCatastrophic damage threatMOBEscambia6 hr
Sep 16, 2:59 AM CDTTornado WarningMOBSanta Rosa31 min
Sep 16, 3:42 AM CDTTornado WarningMOBSanta Rosa15 min
Sep 16, 3:44 AM CDTTornado WarningMOBOkaloosa16 min
Sep 16, 3:45 AM CDTFlash Flood Warning EmergencyCatastrophic damage threatMOBOkaloosa, Santa Rosa8 hr
Sep 16, 3:58 AM CDTFlash Flood WarningMOBEscambia6 hr
Sep 16, 4:00 AM CDTTornado WarningMOBOkaloosa15 min
Sep 16, 5:00 AM CDTFlash Flood WarningMOBEscambia, Okaloosa, Santa Rosa10 hr
Sep 16, 9:33 AM CDTFlash Flood Warning EmergencyCatastrophic damage threatMOBEscambia, Okaloosa, Santa Rosa8 hr
Sep 16, 9:49 AM CDTFlash Flood Warning Considerable damage threatMOBEscambia9 hr
Sep 16, 1:21 PM CDTCoastal Flood AdvisoryMOBEscambia, Okaloosa, Santa Rosa15 hr
Sep 16, 1:21 PM CDTHigh Surf AdvisoryMOBEscambia, Okaloosa, Santa Rosa15 hr
Sep 16, 1:35 PM CDTWind AdvisoryMOBEscambia, Okaloosa, Santa Rosa10 hr
Sep 16, 2:26 PM CDTAreal Flood WarningMOBEscambia, Okaloosa, Santa Rosa12 hr

Nearby

Tornado Warnings in Florida, 2020Every tornado warning in 2020Tornadoes in 2020

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.