Alert archive / Florida / Tornado Warnings in 2008

Tornado Warning 11, NWS Key West, FL

September 9, 2008Monroe County, Florida

NWS Key West, FL issued this tornado warning at Sep 9, 2008, 2:05 PM EDT for Monroe County, Florida. It was in force for 25 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 9, 2008, 2:05 PM EDT (18:05 UTC)
Expired
Sep 9, 2008, 2:30 PM EDT
In force
25 min
Issued by
NWS Key West, FL
Area
Storm-based polygon

County Monroe County, FL

The radar

The Miami radar (KAMX), 53 km from the middle of the area, began a volume at 18:07 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, 6.1 hours before the alert went out and 78 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 2008-09-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2105 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 2008-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 167 square meters per square second.193958Sfc1 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
2105 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
782 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
167 m²/s²
0-3 km storm-relative helicity
205 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 091805
TORKEY
FLC087-091830-
/O.NEW.KKEY.TO.W.0011.080909T1805Z-080909T1830Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE KEY WEST FL
205 PM EDT TUE SEP 9 2008

THE NATIONAL WEATHER SERVICE IN KEY WEST HAS ISSUED A

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

* UNTIL 230 PM EDT

* AT 158 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A WATERSPOUT 9 MILES SOUTHEAST OF KEY LARGO...MOVING NORTHWEST AT
  36 MPH.

* THE TORNADO WILL BE NEAR...
  KEY LARGO BY 215 PM EDT...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

TORNADOES ASSOCIATED WITH TROPICAL CYCLONES MOVE RAPIDLY...ARE OFTEN
WRAPPED IN HEAVY RAIN...AND ARE DIFFICULT TO SEE OR HEAR UNTIL THEY
ARE VERY CLOSE. SEEK SAFE SHELTER IMMEDIATELY

PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE KEY WEST
AT 3 0 5...2 9 5...1 3 1 6...EXTENSION 3.

LAT...LON 2510 8042 2508 8044 2512 8049 2514 8047
      2518 8047 2518 8046 2515 8041 2515 8040
      2514 8041 2512 8038
TIME...MOT...LOC 1803Z 133DEG 31KT 2505 8036

$$

11
1 follow-up statement
000 
WWUS52 KKEY 091826
SVSKEY

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KEY WEST FL
226 PM EDT TUE SEP 9 2008

FLC087-091834-
/O.EXP.KKEY.TO.W.0011.000000T0000Z-080909T1830Z/
UPPER KEYS IN MONROE FL-
224 PM EDT TUE SEP 9 2008

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

THE STORM THAT PROMPTED THE TORNADO WARNING HAS MOVED ACROSS KEY 
LARGO IS NOW IN THE FLORIDA BAY...AND THE STRONG ROTATION HAS 
DECREASED. THEREFORE...THE TORNADO WARNING HAS BEEN CANCELED.

PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE KEY WEST
AT 3 0 5...2 9 5...1 3 1 6...EXTENSION 3.

LAT...LON 2510 8042 2508 8044 2512 8049 2514 8047
      2518 8047 2518 8046 2515 8041 2515 8040
      2514 8041 2512 8038
TIME...MOT...LOC 1824Z 133DEG 31KT 2517 8051

$$

11

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 9, 12:38 AM EDTTornado WarningKEYMonroe37 min
Sep 9, 8:51 AM EDTTornado WarningKEYMonroe14 min
Sep 9, 3:00 PM EDTTornado WarningKEYMonroe30 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.