Alert archive / Florida / Tornado Warnings in 2017

Tornado Warning 80, NWS Jacksonville, FL

September 10, 2017Flagler County, Saint Johns County, Florida

NWS Jacksonville, FL issued this tornado warning at Sep 10, 2017, 8:10 PM EDT for Flagler County, Saint Johns County, Florida. It was in force for 35 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Sep 10, 2017, 8:10 PM EDT (00:10 UTC)
Expired
Sep 10, 2017, 8:45 PM EDT
In force
35 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Flagler County, FL, Saint Johns County, FL

The radar

The Jacksonville radar (KJAX), 102 km from the middle of the area, began a volume at 00:14 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.

What was reported inside it

TimeReportWhereRemark
Sep 10, 8:20 PM EDTTORNADO1 Sse Marineland, FLTHIS TORNADO TOUCHED DOWN IN NORTHERN FLAGLER COUNTY JUST SOUTH OF MARINELAND. DAMAGE WAS LIMITED TO TREES WITH A TORNADIC DEBRIS SIGNATURE NOTED ON KJAX RADAR. THE TORNADO REMAINED OVER THE PELLICER CREEK CONSERVATION AREA BEFORE DISSIPATING JUST WEST OF I-95

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
Sep 10, 12:02 PM EDTTornado WatchSPC13 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 0.2 hours before the alert went out and 104 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, Jacksonville, FL at 00:00Z on 2017-09-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 270 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jacksonville, FL at 00:00Z on 2017-09-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 282 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
270 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
514 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
282 m²/s²
0-3 km storm-relative helicity
319 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.9

Open this sounding in Storm Lab

The text

As transmitted.

500 
WFUS52 KJAX 110010
TORJAX
FLC035-109-110045-
/O.NEW.KJAX.TO.W.0080.170911T0010Z-170911T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Jacksonville FL
810 PM EDT SUN SEP 10 2017

The National Weather Service in Jacksonville has issued a

* Tornado Warning for...
  Northern Flagler County in northeastern Florida...
  Southeastern St. Johns County in northeastern Florida...

* Until 845 PM EDT
    
* At 810 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Marineland, or near Palm Coast, moving west at 45
  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...
  Marineland around 815 PM EDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to 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 2969 8122 2955 8116 2953 8152 2965 8152
TIME...MOT...LOC 0010Z 089DEG 39KT 2964 8115 

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

$$

ZIBURA
3 follow-up statements
032 
WWUS52 KJAX 110018
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
818 PM EDT SUN SEP 10 2017

FLC035-109-110045-
/O.CON.KJAX.TO.W.0080.000000T0000Z-170911T0045Z/
Flagler FL-St. Johns FL-
818 PM EDT SUN SEP 10 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM EDT FOR
NORTHWESTERN FLAGLER AND SOUTHEASTERN ST. JOHNS COUNTIES...
    
At 817 PM EDT, a severe thunderstorm capable of producing a tornado 
just west of Marineland, or just north of Palm Coast, moving west at 
50 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 Flagler and southeastern St. Johns Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to 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 2957 8123 2953 8151 2965 8152 2969 8122
      2961 8119
TIME...MOT...LOC 0017Z 088DEG 43KT 2964 8125 

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

$$

SHASHY
330 
WWUS52 KJAX 110040
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
840 PM EDT SUN SEP 10 2017

FLC035-109-110045-
/O.CON.KJAX.TO.W.0080.000000T0000Z-170911T0045Z/
Flagler FL-St. Johns FL-
840 PM EDT SUN SEP 10 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 PM EDT FOR NORTH
CENTRAL FLAGLER AND SOUTHEASTERN ST. JOHNS COUNTIES...
    
At 839 PM EDT, a severe thunderstorm capable of producing a tornado
was located near San Mateo, or near East Palatka, moving west at 45 
mph. Another storm capable of producing a tornado was around 3 miles 
north of Marineland moving west at 40 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. 

Locations impacted include...
Marineland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to 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 2961 8124 2962 8136 2967 8139 2969 8122
      2961 8119
TIME...MOT...LOC 0039Z 089DEG 39KT 2964 8153 

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

$$

SHASHY
529 
WWUS52 KJAX 110045
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
845 PM EDT SUN SEP 10 2017

FLC035-109-110055-
/O.EXP.KJAX.TO.W.0080.000000T0000Z-170911T0045Z/
Flagler FL-St. Johns FL-
845 PM EDT SUN SEP 10 2017

...THE TORNADO WARNING FOR NORTH CENTRAL FLAGLER AND SOUTHEASTERN ST.
JOHNS COUNTIES HAS EXPIRED...
                
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 allowed to expire.

A tornado watch remains in effect until midnight EDT for northeastern
Florida.

LAT...LON 2961 8124 2962 8136 2967 8139 2969 8122
      2961 8119
TIME...MOT...LOC 0045Z 082DEG 40KT 2968 8129 

$$

SHASHY

The office that day

Everything else NWS Jacksonville, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 10, 8:06 PM EDTAreal Flood WarningJAXDuval, Nassau, Saint Johns3 hr
Sep 10, 8:09 PM EDTAreal Flood WarningJAXClay, Duval, Flagler, Putnam, Saint Johns3 hr
Sep 10, 8:38 PM EDTAreal Flood WarningJAXAlachua, Baker, Bradford, Clay, Duval, Putnam and 2 more3 hr
Sep 10, 8:44 PM EDTAreal Flood WarningJAXDuval, Nassau3 hr
Sep 10, 10:23 PM EDTFlash Flood WarningJAXDuval, Nassau3 hr
Sep 10, 10:56 PM EDTAreal Flood WarningJAXClay, Duval, Nassau, Saint Johns6 hr
Sep 11, 12:26 AM EDTAreal Flood WarningJAXAlachua, Bradford, Clay, Flagler, Marion, Putnam and 1 more3 hr
Sep 11, 12:38 AM EDTAreal Flood WarningJAXNassau6 hr
Sep 11, 12:49 AM EDTFlash Flood WarningJAXFlagler, Marion, Putnam, Saint Johns5 hr
Sep 11, 1:35 AM EDTFlash Flood WarningJAXClay, Flagler, Putnam, Saint Johns3 hr
Sep 11, 2:02 AM EDTTornado WarningJAXNassau28 min
Sep 11, 2:10 AM EDTFlash Flood WarningJAXClay, Saint Johns3 hr
Sep 11, 2:31 AM EDTFlash Flood WarningJAXClay, Duval, Nassau, Saint Johns3 hr
Sep 11, 2:34 AM EDTTornado WarningJAXNassau6 min
Sep 11, 2:41 AM EDTFlash Flood WarningJAXClay, Duval, Saint Johns3 hr
Sep 11, 3:36 AM EDTTornado WarningJAXDuval24 min
Sep 11, 4:10 AM EDTFlash Flood WarningJAXDuval, Nassau3 hr
Sep 11, 4:22 AM EDTAreal Flood AdvisoryJAXMarion3 hr
Sep 11, 4:38 AM EDTAreal Flood AdvisoryJAXAlachua, Bradford, Clay, Putnam3 hr
Sep 11, 5:08 AM EDTAreal Flood WarningJAXAlachua, Baker, Bradford, Columbia, Gilchrist, Union3 hr
Sep 11, 5:14 AM EDTFlash Flood WarningJAXNassau3 hr
Sep 11, 5:34 AM EDTFlash Flood WarningJAXClay, Duval, Nassau, Saint Johns3 hr
Sep 11, 6:15 AM EDTFlash Flood WarningJAXBaker, Bradford, Clay, Columbia, Duval, Union3 hr
Sep 11, 6:37 AM EDTAreal Flood WarningJAXColumbia, Hamilton, Suwannee3 hr
Sep 11, 6:45 AM EDTFlash Flood Warning EmergencyJAXDuval6 hr
Sep 11, 8:23 AM EDTAreal Flood WarningJAXClay, Duval, Nassau, Saint Johns3 hr
Sep 11, 9:06 AM EDTAreal Flood WarningJAXBaker, Bradford, Clay, Columbia, Duval, Union3 hr
Sep 11, 9:48 AM EDTRiver Flood WarningJAXColumbia, Gilchrist, Suwannee18 days
Sep 11, 12:19 PM EDTFlash Flood Warning EmergencyJAXClay, Duval, Putnam, Saint Johns6 hr
Sep 11, 5:11 PM EDTWind AdvisoryJAXBaker, Bradford, Duval, Flagler, Gilchrist, Nassau and 2 more5 hr
Sep 11, 5:18 PM EDTCoastal Flood WarningJAXDuval, Flagler, Nassau3 days
Sep 11, 5:18 PM EDTRip Current StatementJAXDuval, Flagler, Nassau27 hr
Sep 11, 5:18 PM EDTHigh Surf AdvisoryJAXDuval, Flagler, Nassau10 hr
Sep 11, 5:26 PM EDTSmall Craft AdvisoryJAX28 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.