Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 78, NWS Tallahassee, FL

April 28, 2011Leon County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Apr 28, 2011, 8:21 AM EDT for Leon 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: Apr 28, 2011, 8:21 AM EDT (12:21 UTC)
Expired: Apr 28, 2011, 9:00 AM EDT
In force: 39 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

County Leon County, FL

The radar

The Tallahassee radar (KTLH), 17 km from the middle of the area, began a volume at 12:21 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
Apr 28, 8:38 AM EDT	TSTM WND DMG	3 S Bradfordville, FL	NUMEROUS TREES DOWN...HAIL...AND POWER OUTAGES ACROSS NORTHERN LEON COUNTY HAVE BEEN REPORTED. STORM SURVEY IN THE AREA CONFIRMED STRAIGHT LINE WIND DAMAGE UP TO 65 MPH.
Apr 28, 8:38 AM EDT	TSTM WND DMG	Ne Tallahassee, FL	POSSIBLE TORNADO NEAR BRADFORDVILLE AND CENTERVILLE RDS. SPOTTER REPORTED A FUNNEL CLOUD JUST NORTHEAST OF CAPITAL REGIONAL MEDICAL CENTER. TREES DOWN...HAIL...AND POWER OUTAGES HAVE BEEN REPORTED IN THIS AREA AS WELL.

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

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 0.4 hours before the alert went out and 15 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: 3422 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 473 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 210 m²/s²
0-3 km storm-relative helicity: 208 m²/s²
Significant tornado parameter: 3.0
Supercell composite: 14.5

Open this sounding in Storm Lab

The text

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

351 
WUUS52 KTAE 281221
SVRTAE
FLC073-281300-
/O.NEW.KTAE.SV.W.0078.110428T1221Z-110428T1300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
821 AM EDT THU APR 28 2011

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LEON COUNTY IN FLORIDA...

* UNTIL 900 AM EDT

* AT 816 AM EDT...THE NATIONAL WEATHER SERVICE HAS DETECTED A LINE OF
  SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM 11 MILES NORTHWEST OF TALLAHASSEE TO 16
  MILES WEST OF TALLAHASSEE...AND MOVING EAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO      
  TALLAHASSEE AND KILLEARN ESTATES

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SPOTTERS RECENTLY REPORTED HAIL UP TO PING PONG BALL SIZE WITH THIS 
STORM IN MIDWAY. 

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THESE STORMS. MOVE INDOORS
IMMEDIATELY!

&&

LAT...LON 3052 8402 3052 8404 3049 8404 3043 8408
      3035 8408 3036 8453 3046 8445 3048 8440
      3051 8441 3055 8439 3059 8435 3061 8432
      3063 8401 3060 8400
TIME...MOT...LOC 1220Z 266DEG 26KT 3056 8438 3036 8449

$$

38-GODSEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 4:03 AM EDT	Severe Thunderstorm Warning	TAE	Holmes	27 min
Apr 28, 4:27 AM EDT	Severe Thunderstorm Warning	TAE	Holmes, Jackson	48 min
Apr 28, 4:31 AM EDT	Special Marine Warning	TAE		59 min
Apr 28, 5:22 AM EDT	Special Weather Statement	TAE	Jackson	38 min
Apr 28, 5:51 AM EDT	Tornado Warning	TAE	Jackson	39 min
Apr 28, 7:11 AM EDT	Special Weather Statement	TAE	Gadsden	49 min
Apr 28, 7:45 AM EDT	Severe Thunderstorm Warning	TAE	Gadsden, Leon	45 min
Apr 28, 8:02 AM EDT	Tornado Warning	TAE	Gadsden, Leon	28 min
Apr 28, 8:40 AM EDT	Severe Thunderstorm Warning	TAE	Leon, Wakulla	50 min
Apr 28, 8:56 AM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Leon	49 min
Apr 28, 9:16 AM EDT	Tornado Warning	TAE	Leon, Wakulla	29 min
Apr 28, 9:30 AM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Madison	45 min
Apr 28, 9:45 AM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Wakulla	60 min
Apr 28, 10:03 AM EDT	Severe Thunderstorm Warning	TAE	Jefferson	42 min
Apr 28, 10:21 AM EDT	Special Marine Warning	TAE		54 min
Apr 28, 10:41 AM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Madison	49 min
Apr 28, 10:46 AM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Taylor	44 min
Apr 28, 11:30 AM EDT	Special Weather Statement	TAE	Taylor	60 min
Apr 28, 11:31 AM EDT	Special Weather Statement	TAE	Madison	29 min
Apr 28, 12:29 PM EDT	Special Weather Statement	TAE	Lafayette	61 min
Apr 28, 12:39 PM EDT	Severe Thunderstorm Warning	TAE	Madison	21 min
Apr 28, 12:46 PM EDT	Severe Thunderstorm Warning	TAE	Lafayette, Taylor	44 min
Apr 28, 12:56 PM EDT	Tornado Warning	TAE	Lafayette	34 min
Apr 28, 1:29 PM EDT	Severe Thunderstorm Warning	TAE	Lafayette	31 min
Apr 28, 3:42 PM EDT	Fire Weather Watch	TAE	Bay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 10 more	12 hr

Nearby

Severe Thunderstorm Warnings in Florida, 2011 Every severe thunderstorm warning in 2011

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.