Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 83, NWS Tallahassee, FL

April 28, 2011Jefferson County, Wakulla County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Apr 28, 2011, 9:45 AM EDT for Jefferson County, Wakulla County, Florida. It was in force for 60 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: Apr 28, 2011, 9:45 AM EDT (13:45 UTC)
Expired: Apr 28, 2011, 10:45 AM EDT
In force: 60 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

Counties Jefferson County, FL, Wakulla County, FL

The radar

The Tallahassee radar (KTLH), 34 km from the middle of the area, began a volume at 13:46 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 nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 1.8 hours before the alert went out and 34 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.

813 
WUUS52 KTAE 281345
SVRTAE
FLC065-129-281445-
/O.NEW.KTAE.SV.W.0083.110428T1345Z-110428T1445Z/

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

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN JEFFERSON COUNTY IN FLORIDA...
  WAKULLA COUNTY IN FLORIDA...

* UNTIL 1045 AM EDT

* AT 940 AM EDT...THE NATIONAL WEATHER SERVICE HAS DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
  WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  CRAWFORDVILLE...AND MOVING EAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO      
  SHADEVILLE...BETHEL...WAKULLA SPRINGS...HYDE PARK...SAINT          
  MARKS...PORT LEON...WAKULLA...NEWPORT...PLUM ORCHARD...
  FANLEW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM. IF
A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A SMALL INTERIOR ROOM.

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

&&

LAT...LON 3001 8456 3005 8461 3028 8435 3027 8386
      3025 8392 3020 8392 3019 8395 3008 8400
      3009 8406 3006 8416 3008 8419 3008 8424
      3005 8427 3005 8430 2999 8435
TIME...MOT...LOC 1345Z 253DEG 28KT 3017 8431

$$

38-GODSEY

2 follow-up statements

762 
WWUS52 KTAE 281407
SVSTAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
1007 AM EDT THU APR 28 2011

FLC065-129-281445-
/O.CON.KTAE.SV.W.0083.000000T0000Z-110428T1445Z/
JEFFERSON FL-WAKULLA FL-
1007 AM EDT THU APR 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM EDT
FOR EASTERN WAKULLA AND SOUTHWESTERN JEFFERSON COUNTIES...

AT 1003 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR SAINT MARKS...MOVING EAST AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
NEWPORT...PLUM ORCHARD AND FANLEW

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 3010 8439 3028 8435 3027 8388 3025 8392
      3020 8392 3019 8395 3008 8400 3009 8402
      3009 8406 3006 8416 3008 8419 3008 8424
      3001 8436
TIME...MOT...LOC 1407Z 255DEG 31KT 3016 8419

$$

38-GODSEY

114 
WWUS52 KTAE 281426
SVSTAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
1026 AM EDT THU APR 28 2011

FLC065-129-281445-
/O.CON.KTAE.SV.W.0083.000000T0000Z-110428T1445Z/
JEFFERSON FL-WAKULLA FL-
1026 AM EDT THU APR 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM EDT
FOR EASTERN WAKULLA AND SOUTHWESTERN JEFFERSON COUNTIES...

AT 1020 AM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING HALF DOLLAR SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60
MPH.  THIS STORM WAS LOCATED NEAR PLUM ORCHARD...MOVING EAST AT 35
MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO FANLEW

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE 
STRUCK BY LIGHTNING.

&&

LAT...LON 3008 8419 3008 8425 3027 8413 3027 8388
      3025 8392 3020 8392 3018 8396 3008 8400
      3009 8402 3009 8406 3006 8416
TIME...MOT...LOC 1425Z 255DEG 31KT 3019 8405

$$

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, 8:21 AM EDT	Severe Thunderstorm Warning	TAE	Leon	39 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, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.