Alert archive / Florida / Tornado Warnings in 2004

Tornado Warning 10, NWS Miami, FL

August 13, 2004Collier County, Hendry County, Florida

NWS Miami, FL issued this tornado warning at Aug 13, 2004, 8:44 AM EDT for Collier County, Hendry County, Florida. It was in force for 46 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 13, 2004, 8:44 AM EDT (12:44 UTC)
Expired: Aug 13, 2004, 9:30 AM EDT
In force: 46 min
Issued by: NWS Miami, FL
Area: Counties, with a storm outline in the text

Counties Collier County, FL, Hendry County, FL

The radar

The Miami radar (KAMX), 103 km from the middle of the area, began a volume at 12:45 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
Aug 13, 7:30 AM EDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 0.7 hours before the alert went out and 96 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: 1914 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 839 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 175 m²/s²
0-3 km storm-relative helicity: 202 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 6.0

Open this sounding in Storm Lab

The text

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

000 
WFUS52 KMFL 131244
TORMIA
FLC021-051-131330-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MIAMI FL
841 AM EDT FRI AUG 13 2004

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL HENDRY COUNTY IN SOUTH FLORIDA.
  EASTERN COLLIER COUNTY IN SOUTH FLORIDA.

* UNTIL 930 AM EDT

* AT 841 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 34 MILES SOUTH  
  OF DEVILS GARDEN...MOVING NORTH AT 40 MPH. RADAR SHOWED THIS STORM 
  OVER RURAL EASTERN COLLIER COUNTY...NEAR DOG PRAIRIE IN THE        
  EVERGLADES. THE STORM IS HALF WAY BETWEEN HIGHWAY 41 AND           
  INTERSTATE 75.

* THE STORM WILL AFFECT...
  BIG CYPRESS RESERVATION BY 855 AM EDT.
  DEVILS GARDEN BY 925 AM EDT.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED 
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR 
LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 PM EDT FRIDAY AFTERNOON
FOR SOUTHERN FLORIDA.

LAT...LON 2603 8109 2607 8090 2672 8106 2665 8133

$$

EC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 11:58 PM EDT	Severe Thunderstorm Warning	MFL	Miami-Dade	47 min
Aug 13, 1:27 AM EDT	Severe Thunderstorm Warning	MFL	Broward, Miami-Dade	63 min
Aug 13, 1:29 AM EDT	Severe Thunderstorm Warning	MFL	Collier	46 min
Aug 13, 2:54 AM EDT	Severe Thunderstorm Warning	MFL	Glades	21 min
Aug 13, 10:54 AM EDT	Severe Thunderstorm Warning	MFL	Collier, Hendry	51 min
Aug 13, 10:56 AM EDT	Severe Thunderstorm Warning	MFL	Hendry	49 min
Aug 13, 11:06 AM EDT	Tornado Warning	MFL	Hendry	39 min
Aug 13, 11:41 AM EDT	Special Marine Warning	MFL		64 min
Aug 13, 11:45 AM EDT	Tornado Warning	MFL	Glades, Hendry	30 min
Aug 13, 12:17 PM EDT	Tornado Warning	MFL	Glades	43 min
Aug 13, 12:37 PM EDT	Flash Flood Warning	MFL	Glades, Hendry	3 hr
Aug 13, 3:05 PM EDT	Tornado Warning	MFL	Collier, Hendry	25 min

Nearby

Tornado Warnings in Florida, 2004 Every tornado warning in 2004 Tornadoes in 2004

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.