Alert archive / Florida / Tornado Warnings in 2015

Tornado Warning 7, NWS Tallahassee, FL

April 19, 2015Walton County, Florida

NWS Tallahassee, FL issued this tornado warning at Apr 19, 2015, 7:29 AM CDT for Walton County, Florida. It was in force for 31 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 19, 2015, 7:29 AM CDT (12:29 UTC)
Expired: Apr 19, 2015, 8:00 AM CDT
In force: 31 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

County Walton County, FL

The radar

The Eglin Afb radar (KEVX), 30 km from the middle of the area, began a volume at 12:29 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 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, 6:57 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 0.5 hours before the alert went out and 180 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.

843 
WFUS52 KTAE 191229
TORTAE
FLC131-191300-
/O.NEW.KTAE.TO.W.0007.150419T1229Z-150419T1300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
729 AM CDT SUN APR 19 2015

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN WALTON COUNTY IN THE PANHANDLE OF FLORIDA...

* UNTIL 800 AM CDT
    
* AT 728 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED
  NEAR SANTA ROSA BEACH...AND MOVING EAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SANTA ROSA BEACH...EGLIN AIR FORCE BASE...FREEPORT...BUNKER...
  GRAYTON BEACH...PORTLAND AND PORT WASHINGTON.

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 3040 8629 3040 8623 3043 8625 3043 8624
      3038 8617 3038 8612 3039 8611 3047 8614
      3046 8619 3050 8620 3048 8622 3048 8631
      3060 8617 3035 8599 3030 8600 3029 8600
      3029 8604 3039 8634
TIME...MOT...LOC 1228Z 249DEG 24KT 3032 8633 

$$

15-HARRIGAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 3:09 AM CDT	Rip Current Statement	TAE	Bay, Franklin, Gulf, Walton	40 hr
Apr 19, 6:46 AM CDT	Special Marine Warning	TAE		89 min
Apr 19, 7:20 AM CDT	Special Marine Warning	TAE		115 min
Apr 19, 8:01 AM CDT	Severe Thunderstorm Warning	TAE	Bay, Walton, Washington	29 min
Apr 19, 8:24 AM CDT	Tornado Warning	TAE	Walton, Washington	24 min
Apr 19, 9:07 AM CDT	Special Marine Warning	TAE		83 min
Apr 19, 10:21 AM CDT	Special Marine Warning	TAE		114 min
Apr 19, 10:48 AM CDT	Tornado Warning	TAE	Gadsden, Leon, Liberty, Wakulla	12 min
Apr 19, 11:19 AM CDT	Special Marine Warning	TAE		116 min
Apr 19, 11:55 AM CDT	Severe Thunderstorm Warning	TAE	Leon	35 min
Apr 19, 11:59 AM CDT	Tornado Warning	TAE	Leon	13 min
Apr 19, 12:31 PM CDT	River Flood Warning	TAE	Calhoun, Franklin, Gulf, Liberty	9 days
Apr 19, 12:44 PM CDT	Severe Thunderstorm Warning	TAE	Jefferson, Madison	46 min
Apr 19, 12:48 PM CDT	Special Marine Warning	TAE		117 min
Apr 19, 1:15 PM CDT	Severe Thunderstorm Warning	TAE	Lafayette, Madison, Taylor	60 min
Apr 19, 1:56 PM CDT	Severe Thunderstorm Warning	TAE	Dixie, Lafayette, Madison, Taylor	64 min
Apr 19, 2:01 PM CDT	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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.