Alert archive / Florida / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 21, NWS Jacksonville, FL

February 26, 20135 counties in Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Feb 26, 2013, 8:12 AM EST for 5 counties in Florida. It was in force for 48 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 26, 2013, 8:12 AM EST (13:12 UTC)
Expired: Feb 26, 2013, 9:00 AM EST
In force: 48 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

Counties Alachua County, FL, Bradford County, FL, Gilchrist County, FL, Marion County, FL, Union County, FL

The radar

The Jacksonville radar (KJAX), 117 km from the middle of the area, began a volume at 13:14 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

Time	Report	Where	Remark
Feb 26, 8:40 AM EST	TSTM WND DMG	Gainesville, FL	DISPATCH REPORTED NUMEROUS TREES DOWN ON ROADWAYS WITH ONE LANDING ON A VEHICLE. TIME OF REPORT BASED ON RADAR.
Feb 26, 8:45 AM EST	TSTM WND DMG	Nw Gainesville, FL	TREES DOWN IN NORTHWEST PART OF GAINESVILLE. TIME OF REPORT BASED ON RADAR IMAGERY.

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 26, 6:49 AM EST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 1.2 hours before the alert went out and 119 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: 358 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 933 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 308 m²/s²
0-3 km storm-relative helicity: 343 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

532 
WUUS52 KJAX 261312
SVRJAX
FLC001-007-041-083-125-261400-
/O.NEW.KJAX.SV.W.0021.130226T1312Z-130226T1400Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
812 AM EST TUE FEB 26 2013

THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BRADFORD COUNTY IN NORTHERN FLORIDA
  ALACHUA COUNTY IN NORTHERN FLORIDA
  SOUTHEASTERN GILCHRIST COUNTY IN NORTHERN FLORIDA
  UNION COUNTY IN NORTHERN FLORIDA
  NORTHWESTERN MARION COUNTY IN NORTHERN FLORIDA

* UNTIL 900 AM EST

* AT 812 AM EST...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM 7 MILES NORTH OF HIGH SPRINGS TO 8
  MILES SOUTHWEST OF ALACHUA TO 12 MILES SOUTHEAST OF TRENTON...
  MOVING EAST AT 40 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  ALACHUA...WORTHINGTON SPRINGS...LAKE BUTLER...GAINESVILLE...NEW
  RIVER...GAINESVILLE AIRPORT...RAIFORD...SAMPSON...NEWNANS LAKE...
  ROCHELLE...ORANGE HEIGHTS AND STARKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

REPORT SEVERE WEATHER OR DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM EST TUESDAY AFTERNOON
FOR NORTHEASTERN FLORIDA AND SOUTHEAST GEORGIA.

&&

LAT...LON 2982 8268 2985 8260 2991 8258 2994 8253
      2997 8256 3014 8241 3014 8205 2976 8205
      2940 8228 2944 8242 2948 8241 2947 8256
      2953 8257 2953 8265 2956 8266 2955 8276
      2958 8278 2959 8287
TIME...MOT...LOC 1312Z 256DEG 34KT 2993 8255 2971 8253
          2954 8261

$$

SHULER

2 follow-up statements

553 
WWUS52 KJAX 261337
SVSJAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
837 AM EST TUE FEB 26 2013

FLC041-261347-
/O.CAN.KJAX.SV.W.0021.000000T0000Z-130226T1400Z/
GILCHRIST FL-
837 AM EST TUE FEB 26 2013

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GILCHRIST COUNTY
IS CANCELLED...

REPORT SEVERE WEATHER OR DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM EST TUESDAY AFTERNOON
FOR NORTHEASTERN FLORIDA AND SOUTHEAST GEORGIA.

LAT...LON 2950 8248 2979 8251 2992 8247 3014 8241
      3014 8205 2976 8205 2940 8228 2944 8242
      2948 8241
TIME...MOT...LOC 1337Z 266DEG 40KT 3004 8232 2979 8233
          2955 8236

$$

FLC001-007-083-125-261400-
/O.CON.KJAX.SV.W.0021.000000T0000Z-130226T1400Z/
BRADFORD FL-ALACHUA FL-UNION FL-MARION FL-
837 AM EST TUE FEB 26 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 AM EST
FOR NORTHWESTERN MARION...UNION...ALACHUA AND BRADFORD COUNTIES...

AT 837 AM EST...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
TRACK A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM LAKE BUTLER TO LA CROSSE TO 8 MILES WEST OF
MICANOPY...MOVING EAST AT 45 MPH.

SOME ROTATION WAS DETECTED WITH SOME OF THE STORMS ALONG THE LINE.
TORNADOES CAN FORM RAPIDLY WITH LITTLE ADVANCED WARNING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REPORT SEVERE WEATHER OR DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM EST TUESDAY AFTERNOON
FOR NORTHEASTERN FLORIDA AND SOUTHEAST GEORGIA.

&&

LAT...LON 2950 8248 2979 8251 2992 8247 3014 8241
      3014 8205 2976 8205 2940 8228 2944 8242
      2948 8241
TIME...MOT...LOC 1337Z 266DEG 40KT 3004 8232 2979 8233
          2955 8236

$$

WOLF

661 
WWUS52 KJAX 261401
SVSJAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
901 AM EST TUE FEB 26 2013

FLC001-007-083-125-261400-
/O.CON.KJAX.SV.W.0021.000000T0000Z-130226T1400Z/
BRADFORD FL-ALACHUA FL-UNION FL-MARION FL-
901 AM EST TUE FEB 26 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 AM EST
FOR NORTHWESTERN MARION...EASTERN UNION...EASTERN ALACHUA AND
BRADFORD COUNTIES...

AT 859 AM EST...A LINE OF STRONG THUNDERSTORMS WAS DETECTED OVER
EASTERN ALACHUA AND CENTRAL BRADFORD COUNTIES...MOVING EAST AT 45
MPH. THE STRONGEST STORMS ALONG THE LINE ARE CAPABLE OF WINDS UP
TO 60 MPH.

THE WARNING WILL BE ALLOWED TO EXPIRE AT 900AM...AS THE STORMS MOVE
EASTWARD INTO A NEW WARNING AREA.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

REPORT SEVERE WEATHER OR DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 PM EST TUESDAY AFTERNOON
FOR NORTHEASTERN FLORIDA AND SOUTHEAST GEORGIA.

&&

LAT...LON 2945 8235 2981 8228 2993 8228 3014 8230
      3014 8205 2976 8205 2940 8228
TIME...MOT...LOC 1359Z 263DEG 38KT 3013 8214 2983 8208
          2959 8211

$$

WOLF

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 25, 7:09 PM EST	Special Weather Statement	JAX	Saint Johns	36 min
Feb 25, 7:12 PM EST	Special Weather Statement	JAX	Saint Johns	33 min
Feb 25, 7:50 PM EST	Special Marine Warning	JAX		85 min
Feb 25, 8:13 PM EST	Areal Flood Advisory	JAX	Columbia, Suwannee	92 min
Feb 25, 9:42 PM EST	Areal Flood Advisory	JAX	Columbia, Hamilton, Suwannee	93 min
Feb 25, 11:53 PM EST	Special Marine Warning	JAX		2 hr
Feb 26, 1:54 AM EST	Special Marine Warning	JAX		66 min
Feb 26, 5:01 AM EST	Lake Wind Advisory	JAX	Baker, Bradford, Flagler, Gilchrist, Nassau, Suwannee and 1 more	13 hr
Feb 26, 6:46 AM EST	Special Weather Statement	JAX	Columbia, Hamilton, Suwannee	44 min
Feb 26, 6:56 AM EST	Special Weather Statement	JAX	Putnam	49 min
Feb 26, 7:26 AM EST	Special Weather Statement	JAX	Alachua, Columbia, Gilchrist, Hamilton, Suwannee	49 min
Feb 26, 7:37 AM EST	Severe Thunderstorm Warning	JAX	Columbia, Gilchrist, Suwannee, Union	68 min
Feb 26, 8:19 AM EST	Severe Thunderstorm Warning	JAX	Baker	41 min
Feb 26, 8:26 AM EST	Special Weather Statement	JAX	Marion	64 min
Feb 26, 8:49 AM EST	Severe Thunderstorm Warning	JAX	Alachua, Marion, Putnam	56 min
Feb 26, 9:00 AM EST	Severe Thunderstorm Warning	JAX	Alachua, Bradford, Clay, Putnam, Union	60 min
Feb 26, 9:06 AM EST	Special Weather Statement	JAX	Duval, Nassau	54 min
Feb 26, 9:50 AM EST	Special Weather Statement	JAX	Duval	40 min
Feb 26, 9:54 AM EST	Special Weather Statement	JAX	Flagler, Putnam, Saint Johns	66 min
Feb 26, 10:12 AM EST	Tornado Warning	JAX	Flagler, Putnam, Saint Johns	48 min
Feb 26, 10:14 AM EST	Special Marine Warning	JAX		2 hr
Feb 26, 10:43 AM EST	Special Weather Statement	JAX	Marion	32 min

Nearby

Severe Thunderstorm Warnings in Florida, 2013 Every severe thunderstorm warning in 2013

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.