Alert archive / Florida / Tornado Warnings in 2004

Tornado Warning 2, NWS EYW

August 12, 2004Monroe County, Florida

NWS EYW issued this tornado warning at Aug 12, 2004, 9:43 PM EDT for Monroe County, Florida. It was in force for 62 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 12, 2004, 9:43 PM EDT (01:43 UTC)
Expired
Aug 12, 2004, 10:45 PM EDT
In force
62 min
Issued by
NWS EYW
Area
Counties, with a storm outline in the text

County Monroe County, FL

The radar

The Key West radar (KBYX), 53 km from the middle of the area, began a volume at 01:46 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 12, 9:35 PM EDTTornado WatchSPC10 hr

The nearest sounding before it

Key West, FL (KEYW), launched 00:00Z, 1.7 hours before the alert went out and 54 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, Key West, FL at 00:00Z on 2004-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2738 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Key West, FL at 00:00Z on 2004-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 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
2738 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
1066 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
63 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.

658 
WFUS52 KEYW 130143
TOREYW
FLC087-130245-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE KEY WEST FL
939 PM EDT THU AUG 12 2004

THE NATIONAL WEATHER SERVICE IN KEY WEST HAS ISSUED A

* TORNADO WARNING FOR...
  MIDDLE KEYS IN MONROE COUNTY IN FLORIDA

* UNTIL 1045 PM EDT

* AT 936 PM EDT...KEY WEST DOPPLER RADAR INDICATED A DEVELOPING
  TORNADO 20 MILES SOUTH OF BOOT KEY...OR ABOUT 22 MILES SOUTH OF
  MARATHON AIRPORT...MOVING NORTHWEST AT 25 MPH.

* SOME LOCATIONS NEAR THE PATH OF THE STORM THROUGH 1045 PM EDT...
  PIGEON KEY...KNIGHT KEY...SEVEN MILE BRIDGE...AND BOOT KEY.

VERY HEAVY RAIN MAY MAKE THIS TORNADO HARD TO SEE...TAKE COVER NOW!
IF YOU WAIT UNTIL YOU SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO
GET TO A SAFE PLACE.

AVOID THE SEVEN MILE BRIDGE UNTIL THE ALL CLEAR IS GIVEN.

LAT...LON 2442 8120 2447 8105 2485 8116 2477 8130

$$

DFM/BS/JL/JR

The office that day

Everything else NWS EYW issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 13, 5:49 AM EDTTornado WarningEYWMonroe26 min
Aug 13, 9:58 AM EDTTornado WarningEYWMonroe47 min

Nearby

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