Alert archive / Florida / Tornado Warnings in 2015

Tornado Warning 3, NWS Miami, FL

August 17, 2015Hendry County, Florida

NWS Miami, FL issued this tornado warning at Aug 17, 2015, 5:36 PM EDT for Hendry County, Florida. It was in force for 11 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
Aug 17, 2015, 5:36 PM EDT (21:36 UTC)
Expired
Aug 17, 2015, 5:47 PM EDT
In force
11 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

County Hendry County, FL

The radar

The Miami radar (KAMX), 132 km from the middle of the area, began a volume at 21:39 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

Miami, FL (KMFL), launched 12:00Z, 9.6 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-pSkew-T log-p diagram, Miami, FL at 12:00Z on 2015-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2531 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Miami, FL at 12:00Z on 2015-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -24 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2531 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
739 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-24 m²/s²
0-3 km storm-relative helicity
-8 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

674 
WFUS52 KMFL 172136
TORMFL
FLC051-172200-
/O.NEW.KMFL.TO.W.0003.150817T2136Z-150817T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MIAMI FL
536 PM EDT MON AUG 17 2015

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN HENDRY COUNTY IN SOUTHERN FLORIDA...

* UNTIL 600 PM EDT
    
* AT 535 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED
  NEAR MONTURA. THE TORNADIC STORM WAS DRIFTING WEST.

* LOCATIONS IMPACTED INCLUDE...
  MONTURA AND DEVILS GARDEN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO A SHELTER 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 2670 8097 2660 8096 2656 8114 2673 8114
TIME...MOT...LOC 2135Z 064DEG 1KT 2666 8101 

$$

GREGORIA
1 follow-up statement
754 
WWUS52 KMFL 172147
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
547 PM EDT MON AUG 17 2015

FLC051-172156-
/O.CAN.KMFL.TO.W.0003.000000T0000Z-150817T2200Z/
HENDRY FL-
547 PM EDT MON AUG 17 2015

...THE TORNADO WARNING FOR NORTHEASTERN HENDRY COUNTY IS CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS TO BE CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 2670 8097 2660 8096 2656 8114 2673 8114
TIME...MOT...LOC 2144Z 064DEG 1KT 2666 8101 

$$

GREGORIA

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 4:08 PM EDTSpecial Weather StatementMFLCollier52 min
Aug 17, 4:18 PM EDTSpecial Weather StatementMFLGlades42 min
Aug 17, 5:03 PM EDTSpecial Weather StatementMFLCollier27 min
Aug 17, 5:05 PM EDTSpecial Marine WarningMFL115 min
Aug 17, 5:18 PM EDTSpecial Weather StatementMFLHendry27 min

Nearby

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