Alert archive / Florida / Tornado Warnings in 2008

Tornado Warning 16, NWS Key West, FL

September 29, 2008Monroe County, Florida

NWS Key West, FL issued this tornado warning at Sep 29, 2008, 4:00 PM EDT for Monroe County, Florida. It was in force for 14 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
Sep 29, 2008, 4:00 PM EDT (20:00 UTC)
Expired
Sep 29, 2008, 4:14 PM EDT
In force
14 min
Issued by
NWS Key West, FL
Area
Storm-based polygon

County Monroe County, FL

The radar

The Key West radar (KBYX), 5 km from the middle of the area, began a volume at 20:00 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

Key West, FL (KEYW), launched 12:00Z, 8.0 hours before the alert went out and 3 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 12:00Z on 2008-09-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 928 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, Key West, FL at 12:00Z on 2008-09-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 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
928 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
885 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
39 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.

000 
WFUS52 KKEY 292000
TORKEY
FLC087-292030-
/O.NEW.KKEY.TO.W.0016.080929T2000Z-080929T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE KEY WEST FL
400 PM EDT MON SEP 29 2008

THE NATIONAL WEATHER SERVICE IN KEY WEST HAS ISSUED A

* TORNADO WARNING FOR...
  LOWER KEYS IN MONROE COUNTY IN FLORIDA...
  THIS INCLUDES THE COMMUNITY OF KEY WEST...

* UNTIL 430 PM EDT

* AT 354 PM EDT...A WATERSPOUT WAS REPORTED TO BE MOVING ONSHORE NEAR
  KEY WEST...MOVING SOUTHWEST AT 9 MPH.

* THE TORNADO WILL BE NEAR...
  RURAL LOWER KEYS IN MONROE COUNTY AT 410 PM EDT

WATERSPOUTS THAT MOVE ONSHORE ARE DANGEROUS AND CAN BE DEADLY. IF
THREATENING WEATHER APPROACHES...SEE SHELTER IMMEDIATELY

LAT...LON 2460 8180 2459 8178 2457 8178 2459 8173
      2457 8172 2459 8171 2461 8170 2456 8167
      2455 8171 2456 8172 2454 8181
TIME...MOT...LOC 2000Z 057DEG 8KT 2458 8180

$$
BS
1 follow-up statement
000 
WWUS52 KKEY 292014
SVSKEY

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KEY WEST FL
414 PM EDT MON SEP 29 2008

FLC087-292025-
/O.CAN.KKEY.TO.W.0016.000000T0000Z-080929T2030Z/
LOWER KEYS IN MONROE FL-
414 PM EDT MON SEP 29 2008

...THE TORNADO WARNING FOR LOWER KEYS IN MONROE COUNTY IS CANCELED...

THE WATERSPOUT...WHICH MOVED ONSHORE IN KEY WEST OVER THE COAST 
GUARD SECTOR KEY WEST BUILDING...HAS PASSED WEST OF KEY WEST AND 
DISSIPATED. THEREFORE...THE TORNADO WARNING FOR THE LOWER KEYS IN 
MONROE COUNTY HAS BEEN CANCELED. 


LAT...LON 2460 8180 2459 8178 2457 8178 2459 8173
      2457 8172 2459 8171 2461 8170 2456 8167
      2455 8171 2456 8172 2454 8181
TIME...MOT...LOC 2012Z 057DEG 8KT 2457 8182

$$
BS

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 29, 2:22 AM EDTSpecial Marine WarningKEY30 min
Sep 29, 1:03 PM EDTSpecial Marine WarningKEY13 min
Sep 29, 3:56 PM EDTSpecial Marine WarningKEY18 min

Nearby

Tornado Warnings in Florida, 2008Every tornado warning in 2008Tornadoes in 2008

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.