Alert archive / Florida / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 13, NWS Jacksonville, FL

February 24, 2016Bradford County, Clay County, Duval County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Feb 24, 2016, 7:36 AM EST for Bradford County, Clay County, Duval County, Florida. It was in force for 39 min. 2 reports 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: Feb 24, 2016, 7:36 AM EST (12:36 UTC)
Expired: Feb 24, 2016, 8:15 AM EST
In force: 39 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 70.0 mph

Counties Bradford County, FL, Clay County, FL, Duval County, FL

The radar

The Jacksonville radar (KJAX), 38 km from the middle of the area, began a volume at 12:36 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

Time	Report	Where	Remark
Feb 24, 7:40 AM EST	TSTM WND DMG	1 Ese Lawtey, FL	EMERGENCY MANAGER REPORTS SEVERAL TREES DOWN NEAR THE 900 BLOCK OF NE 223RD ST.
Feb 24, 7:40 AM EST	TSTM WND DMG	1 S Lawtey, FL	BROADCAST MEDIA RELAYS REPORT OF DAMAGE TO THE LAWTEY CORRECTIONAL FACILITY. TIME BASED ON RADAR.

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.

Issued	Product	Office	Lasted
Feb 24, 3:58 AM EST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 0.6 hours before the alert went out and 40 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: 593 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 649 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 506 m²/s²
0-3 km storm-relative helicity: 524 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 11.7

Open this sounding in Storm Lab

The text

As transmitted.

597 
WUUS52 KJAX 241236
SVRJAX
FLC007-019-031-241315-
/O.NEW.KJAX.SV.W.0013.160224T1236Z-160224T1315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
736 AM EST WED FEB 24 2016

THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN BRADFORD COUNTY IN NORTHERN FLORIDA...
  NORTHERN CLAY COUNTY IN NORTHEASTERN FLORIDA...
  SOUTHWESTERN DUVAL COUNTY IN NORTHEASTERN FLORIDA...

* UNTIL 815 AM EST

* AT 735 AM EST...A SEVERE THUNDERSTORM WAS LOCATED NEAR STARKE...
  MOVING NORTHEAST AT 45 MPH.

  HAZARD...70 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT CONSIDERABLE TREE DAMAGE. DAMAGE IS LIKELY TO 
           MOBILE HOMES...ROOFS AND OUTBUILDINGS. 

* LOCATIONS IMPACTED INCLUDE...
  JACKSONVILLE...ORANGE PARK...STARKE...MIDDLEBURG...MANDARIN...ARLINGTON...
  FRUIT COVE...ORTEGA...SAN MARCO...RIVERSIDE...OAKLEAF PLANTATION...
  FLEMING ISLAND...NAS JAX...LAKESIDE...KINGSLEY...BAYARD...BAYMEADOWS...
  MAXVILLE...CISCO GARDENS AND CAMP BLANDING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMAIN ALERT FOR A POSSIBLE TORNADO! TORNADOES CAN DEVELOP QUICKLY
FROM SEVERE THUNDERSTORMS. IF YOU SPOT A TORNADO GO AT ONCE INTO THE
BASEMENT OR SMALL CENTRAL ROOM IN A STURDY STRUCTURE.

THIS IS A POTENTIALLY DEADLY STORM. SEEK SHELTER IN AN INTERIOR ROOM
ON THE LOWEST FLOOR OF A WELL-BUILT STRUCTURE. ABANDON VEHICLES IN
SEARCH OF A MORE SUBSTANTIAL PERMANENT STRUCTURE. STAY AWAY FROM
WINDOWS.

INTENSE THUNDERSTORM LINES CAN PRODUCE BRIEF TORNADOES AND WIDESPREAD
SIGNIFICANT WIND DAMAGE. ALTHOUGH A TORNADO IS NOT IMMEDIATELY
LIKELY...IT IS BEST TO MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
A BUILDING. THIS STORM MAY CAUSE SERIOUS INJURY AND SIGNIFICANT
PROPERTY DAMAGE.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 AM EST FOR NORTHEASTERN
FLORIDA.

LAT...LON 3011 8154 3013 8160 3012 8168 3005 8169
      2988 8213 3003 8224 3007 8218 3015 8213
      3015 8205 3024 8205 3051 8179 3051 8178
      3017 8143 3016 8143
TIME...MOT...LOC 1235Z 237DEG 39KT 3001 8211 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
 
$$

HESS

2 follow-up statements

501 
WWUS52 KJAX 241251
SVSJAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
751 AM EST WED FEB 24 2016

FLC007-241301-
/O.CAN.KJAX.SV.W.0013.000000T0000Z-160224T1315Z/
BRADFORD FL-
751 AM EST WED FEB 24 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BRADFORD COUNTY
IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 AM EST FOR NORTHEASTERN
FLORIDA.

LAT...LON 3011 8154 3012 8154 3013 8160 3012 8168
      3005 8169 2991 8205 3024 8205 3051 8179
      3051 8178 3017 8143 3016 8143
TIME...MOT...LOC 1251Z 233DEG 37KT 3011 8197 

$$

FLC019-031-241315-
/O.CON.KJAX.SV.W.0013.000000T0000Z-160224T1315Z/
CLAY FL-DUVAL FL-
751 AM EST WED FEB 24 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 AM EST
FOR NORTHERN CLAY AND SOUTHWESTERN DUVAL COUNTIES...

AT 751 AM EST...A SEVERE THUNDERSTORM WAS LOCATED NEAR MIDDLEBURG...
MOVING NORTHEAST AT 45 MPH.

HAZARD...60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES. 

LOCATIONS IMPACTED INCLUDE...
JACKSONVILLE...ORANGE PARK...MIDDLEBURG...MANDARIN...ARLINGTON...FRUIT
COVE...ORTEGA...SAN MARCO...RIVERSIDE...OAKLEAF PLANTATION...FLEMING
ISLAND...NAS JAX...LAKESIDE...KINGSLEY...BAYARD...BAYMEADOWS...MAXVILLE...
CISCO GARDENS...CAMP BLANDING AND DOCTORS INLET.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMAIN ALERT FOR A POSSIBLE TORNADO! TORNADOES CAN DEVELOP QUICKLY
FROM SEVERE THUNDERSTORMS. IF YOU SPOT A TORNADO GO AT ONCE INTO THE
BASEMENT OR SMALL CENTRAL ROOM IN A STURDY STRUCTURE.

THIS IS A POTENTIALLY DEADLY STORM. SEEK SHELTER IN AN INTERIOR ROOM
ON THE LOWEST FLOOR OF A WELL-BUILT STRUCTURE. ABANDON VEHICLES IN
SEARCH OF A MORE SUBSTANTIAL PERMANENT STRUCTURE. STAY AWAY FROM
WINDOWS.

INTENSE THUNDERSTORM LINES CAN PRODUCE BRIEF TORNADOES AND WIDESPREAD
SIGNIFICANT WIND DAMAGE. ALTHOUGH A TORNADO IS NOT IMMEDIATELY
LIKELY...IT IS BEST TO MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
A BUILDING. THIS STORM MAY CAUSE SERIOUS INJURY AND SIGNIFICANT
PROPERTY DAMAGE.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 AM EST FOR NORTHEASTERN
FLORIDA.

LAT...LON 3011 8154 3012 8154 3013 8160 3012 8168
      3005 8169 2991 8205 3024 8205 3051 8179
      3051 8178 3017 8143 3016 8143
TIME...MOT...LOC 1251Z 233DEG 37KT 3011 8197 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

HESS

359 
WWUS52 KJAX 241316
SVSJAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
816 AM EST WED FEB 24 2016

FLC019-031-241325-
/O.EXP.KJAX.SV.W.0013.000000T0000Z-160224T1315Z/
CLAY FL-DUVAL FL-
816 AM EST WED FEB 24 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CLAY AND SOUTHWESTERN
DUVAL COUNTIES HAS EXPIRED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED. THEREFORE THE
WARNING HAS BEEN ALLOWED TO EXPIRE.  HOWEVER GUSTY WINDS OF 45
TO 55 MPH ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 AM EST FOR NORTHEASTERN
FLORIDA.

LAT...LON 3011 8154 3012 8154 3013 8160 3012 8168
      3005 8169 2991 8205 3024 8205 3051 8179
      3051 8178 3017 8143 3016 8143
TIME...MOT...LOC 1312Z 237DEG 39KT 3011 8197 

$$

HESS

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 24, 2:10 AM EST	Wind Advisory	JAX	Baker, Bradford, Duval, Flagler, Gilchrist, Nassau and 2 more	16 hr
Feb 24, 2:33 AM EST	Gale Warning	JAX		31 hr
Feb 24, 5:12 AM EST	Special Weather Statement	JAX	Baker, Columbia, Hamilton, Suwannee	48 min
Feb 24, 5:20 AM EST	Severe Thunderstorm Warning	JAX	Columbia, Hamilton, Suwannee	40 min
Feb 24, 5:42 AM EST	Special Weather Statement	JAX	Columbia, Gilchrist	48 min
Feb 24, 5:54 AM EST	Severe Thunderstorm Warning	JAX	Alachua, Columbia, Gilchrist	51 min
Feb 24, 6:27 AM EST	Special Weather Statement	JAX	Alachua, Baker, Bradford, Clay, Columbia, Union	63 min
Feb 24, 6:44 AM EST	Special Weather Statement	JAX	Suwannee	31 min
Feb 24, 6:55 AM EST	Special Weather Statement	JAX	Bradford, Union	35 min
Feb 24, 7:09 AM EST	Severe Thunderstorm Warning	JAX	Alachua, Baker, Bradford, Clay, Union	36 min
Feb 24, 7:22 AM EST	Special Weather Statement	JAX	Duval, Nassau	38 min
Feb 24, 7:25 AM EST	Special Marine Warning	JAX		3 hr
Feb 24, 7:38 AM EST	Special Weather Statement	JAX	Marion	67 min
Feb 24, 8:15 AM EST	Special Weather Statement	JAX	Duval, Nassau	45 min
Feb 24, 8:41 AM EST	Severe Thunderstorm Warning	JAX	Marion	49 min
Feb 24, 8:59 AM EST	Special Weather Statement	JAX	Flagler, Putnam	61 min
Feb 24, 9:20 AM EST	Special Marine Warning	JAX		115 min
Feb 24, 9:57 AM EST	Special Weather Statement	JAX	Flagler	33 min
Feb 24, 12:15 PM EST	Special Weather Statement	JAX	Putnam	45 min
Feb 24, 2:08 PM EST	Special Marine Warning	JAX		2 hr

Nearby

Severe Thunderstorm Warnings in Florida, 2016 Every severe thunderstorm warning in 2016

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.