Alert archive / Florida / Tornado Warnings in 2017

Tornado Warning 31, NWS Mobile, AL

June 21, 2017Okaloosa County, Santa Rosa County, Florida

NWS Mobile, AL issued this tornado warning at Jun 21, 2017, 2:15 PM CDT for Okaloosa County, Santa Rosa County, Florida. It was in force for 45 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
Jun 21, 2017, 2:15 PM CDT (19:15 UTC)
Expired
Jun 21, 2017, 3:00 PM CDT
In force
45 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Okaloosa County, FL, Santa Rosa County, FL

The radar

The Eglin Afb radar (KEVX), 86 km from the middle of the area, began a volume at 19:14 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
Jun 21, 10:01 AM CDTTornado WatchSPC9 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 7.3 hours before the alert went out and 241 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 12:00Z on 2017-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 571 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, Tallahassee Rgnl, FL at 12:00Z on 2017-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 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
571 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
740 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
151 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

180 
WFUS54 KMOB 211915
TORMOB
FLC091-113-212000-
/O.NEW.KMOB.TO.W.0031.170621T1915Z-170621T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mobile AL
215 PM CDT WED JUN 21 2017

The National Weather Service in Mobile has issued a

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

* Until 300 PM CDT
    
* At 214 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Baker, or 10 miles west of Crestview, moving north
  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 tornadic thunderstorm will remain over mainly rural areas of
  northwestern Okaloosa and northeastern Santa Rosa Counties.

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 3071 8668 3067 8678 3099 8700 3099 8670
TIME...MOT...LOC 1914Z 160DEG 29KT 3072 8675 

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

$$
2 follow-up statements
963 
WWUS54 KMOB 211926
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
226 PM CDT WED JUN 21 2017

FLC091-113-212000-
/O.CON.KMOB.TO.W.0031.000000T0000Z-170621T2000Z/
Okaloosa FL-Santa Rosa FL-
226 PM CDT WED JUN 21 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR
NORTHWESTERN OKALOOSA AND NORTHEASTERN SANTA ROSA COUNTIES...
    
At 226 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Baker, or 10 miles west of Crestview, moving north
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 tornadic thunderstorm will remain over mainly rural areas of
northwestern Okaloosa and northeastern Santa Rosa Counties.

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 3074 8670 3073 8678 3099 8700 3099 8670
TIME...MOT...LOC 1926Z 163DEG 22KT 3078 8675 

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

$$
922 
WWUS54 KMOB 211933
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
233 PM CDT WED JUN 21 2017

FLC091-113-212000-
/O.CON.KMOB.TO.W.0031.000000T0000Z-170621T2000Z/
Okaloosa FL-Santa Rosa FL-
233 PM CDT WED JUN 21 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR
NORTHWESTERN OKALOOSA AND NORTHEASTERN SANTA ROSA COUNTIES...
    
At 233 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Baker, or 11 miles west of Crestview, moving north
at 20 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 tornadic thunderstorm will remain over mainly rural areas of
northwestern Okaloosa and northeastern Santa Rosa Counties.

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 3078 8671 3078 8678 3099 8700 3099 8670
TIME...MOT...LOC 1933Z 169DEG 17KT 3081 8676 

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

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 1:56 AM CDTFlash Flood WarningMOBEscambia, Santa Rosa12 hr
Jun 21, 4:33 AM CDTTornado WarningMOBOkaloosa31 min
Jun 21, 6:11 AM CDTTornado WarningMOBOkaloosa22 min
Jun 21, 6:56 AM CDTFlash Flood WarningMOBOkaloosa, Santa Rosa6 hr
Jun 21, 8:38 AM CDTRiver Flood WarningMOBEscambia48 hr
Jun 21, 8:38 AM CDTRiver Flood WarningMOBEscambia12 days
Jun 21, 8:38 AM CDTRiver Flood WarningMOBOkaloosa, Santa Rosa3 days
Jun 21, 8:38 AM CDTRiver Flood WarningMOBOkaloosa3 days
Jun 21, 12:05 PM CDTFlash Flood WarningMOBEscambia, Santa Rosa6 hr
Jun 21, 12:35 PM CDTAreal Flood WarningMOBEscambia, Okaloosa, Santa Rosa24 hr
Jun 21, 2:44 PM CDTTornado WarningMOBOkaloosa, Santa Rosa30 min
Jun 21, 2:46 PM CDTTornado WarningMOBEscambia59 min
Jun 21, 3:53 PM CDTTornado WarningMOBEscambia52 min
Jun 21, 4:17 PM CDTTornado WarningMOBEscambia43 min
Jun 21, 5:51 PM CDTFlash Flood WarningMOBEscambia, Santa Rosa6 hr
Jun 21, 6:33 PM CDTSpecial Weather StatementMOBEscambia42 min

Nearby

Tornado Warnings in Florida, 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.