Alert archive / Florida / Tornado Warnings in 2015

Tornado Warning 18, NWS Tallahassee, FL

April 19, 2015Leon County, Florida

NWS Tallahassee, FL issued this tornado warning at Apr 19, 2015, 12:59 PM EDT for Leon County, Florida. It was in force for 13 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: Apr 19, 2015, 12:59 PM EDT (16:59 UTC)
Expired: Apr 19, 2015, 1:12 PM EDT
In force: 13 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

County Leon County, FL

The radar

The Tallahassee radar (KTLH), 25 km from the middle of the area, began a volume at 17:01 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 19, 1:00 PM EDT	TSTM WND DMG	6 N Tallahassee, FL	TREE DOWN ON VEHICLE AT MERIDIAN AND MACLAY

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
Apr 19, 7:57 AM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 5.0 hours before the alert went out and 24 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: 760 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 636 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 340 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

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

595 
WFUS52 KTAE 191659
TORTAE
FLC073-191730-
/O.NEW.KTAE.TO.W.0018.150419T1659Z-150419T1730Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
1259 PM EDT SUN APR 19 2015

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN LEON COUNTY IN THE BIG BEND OF FLORIDA...

* UNTIL 130 PM EDT
    
* AT 1259 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED
  NEAR TALLAHASSEE...AND MOVING NORTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  TALLAHASSEE...BRADFORDVILLE...IAMONIA...FOREST MEADOWS PARK...
  MOCCASIN GAP...PISGAH CHURCH...MACLAY STATE GARDENS AND KILLEARN
  LAKES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE IN A MOBILE
HOME OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3050 8427 3054 8432 3068 8420 3067 8401
      3062 8401
TIME...MOT...LOC 1659Z 228DEG 24KT 3054 8427 

$$

15-HARRIGAN

1 follow-up statement

621 
WWUS52 KTAE 191712
SVSTAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
112 PM EDT SUN APR 19 2015

FLC073-191721-
/O.CAN.KTAE.TO.W.0018.000000T0000Z-150419T1730Z/
LEON FL-
112 PM EDT SUN APR 19 2015

...THE TORNADO WARNING FOR NORTHEASTERN LEON COUNTY IS CANCELLED...
    
THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING 
HAS BEEN CANCELLED. HOWEVER...DAMAGING WINDS REMAIN LIKELY AND A 
SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR THE AREA.

LAT...LON 3050 8427 3054 8432 3068 8420 3067 8401
      3062 8401
TIME...MOT...LOC 1708Z 228DEG 24KT 3059 8420 

$$

15-HARRIGAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 4:09 AM EDT	Rip Current Statement	TAE	Bay, Franklin, Gulf, Walton	40 hr
Apr 19, 7:46 AM EDT	Special Marine Warning	TAE		89 min
Apr 19, 8:20 AM EDT	Special Marine Warning	TAE		115 min
Apr 19, 8:29 AM EDT	Tornado Warning	TAE	Walton	31 min
Apr 19, 9:01 AM EDT	Severe Thunderstorm Warning	TAE	Bay, Walton, Washington	29 min
Apr 19, 9:24 AM EDT	Tornado Warning	TAE	Walton, Washington	24 min
Apr 19, 10:07 AM EDT	Special Marine Warning	TAE		83 min
Apr 19, 11:21 AM EDT	Special Marine Warning	TAE		114 min
Apr 19, 11:48 AM EDT	Tornado Warning	TAE	Gadsden, Leon, Liberty, Wakulla	12 min
Apr 19, 12:19 PM EDT	Special Marine Warning	TAE		116 min
Apr 19, 12:55 PM EDT	Severe Thunderstorm Warning	TAE	Leon	35 min
Apr 19, 1:31 PM EDT	River Flood Warning	TAE	Calhoun, Franklin, Gulf, Liberty	9 days
Apr 19, 1:44 PM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Madison	46 min
Apr 19, 1:48 PM EDT	Special Marine Warning	TAE		117 min
Apr 19, 2:15 PM EDT	Severe Thunderstorm Warning	TAE	Lafayette, Madison, Taylor	60 min
Apr 19, 2:56 PM EDT	Severe Thunderstorm Warning	TAE	Dixie, Lafayette, Madison, Taylor	64 min
Apr 19, 3:01 PM EDT	Severe Thunderstorm Warning	TAE	Madison	29 min

Nearby

Tornado Warnings in Florida, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.