Alert archive / Florida / Tornado Warnings in 2011

Tornado Warning 1, NWS Key West, FL

October 16, 2011Monroe County, Florida

NWS Key West, FL issued this tornado warning at Oct 16, 2011, 9:58 PM EDT for Monroe County, Florida. It was in force for 22 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
Oct 16, 2011, 9:58 PM EDT (01:58 UTC)
Expired
Oct 16, 2011, 10:20 PM EDT
In force
22 min
Issued by
NWS Key West, FL
Area
Storm-based polygon

County Monroe County, FL

The radar

The Key West radar (KBYX), 12 km from the middle of the area, began a volume at 01:58 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 00:00Z, 2.0 hours before the alert went out and 16 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 2011-10-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 500 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 2011-10-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 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
500 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
472 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
128 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.

696 
WFUS52 KKEY 170158
TORKEY
FLC087-170230-
/O.NEW.KKEY.TO.W.0001.111017T0158Z-111017T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE KEY WEST FL
958 PM EDT SUN OCT 16 2011

THE NATIONAL WEATHER SERVICE IN KEY WEST HAS ISSUED A

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

* UNTIL 1030 PM EDT

* AT 958 PM EDT...DOPPLER RADAR INDICATED A TORNADO OVER HAWK        
  CHANNEL...MOVING NORTHWEST AT 20 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  CUDJOE BAY...UPPER SUGARLOAF KEY.

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

LAT...LON 2462 8165 2462 8163 2466 8163 2468 8168
      2466 8169 2468 8171 2471 8166 2468 8165
      2466 8159 2470 8156 2471 8160 2473 8159
      2473 8158 2471 8157 2468 8152 2463 8150
      2461 8147 2463 8150 2458 8160
TIME...MOT...LOC 0155Z 140DEG 15KT 2472 8163

$$
JOHNSON
1 follow-up statement
692 
WWUS52 KKEY 170220
SVSKEY

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KEY WEST FL
1020 PM EDT SUN OCT 16 2011

FLC087-170228-
/O.CAN.KKEY.TO.W.0001.000000T0000Z-111017T0230Z/
LOWER KEYS IN MONROE FL-
1020 PM EDT SUN OCT 16 2011

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

AT 1018 PM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE 
STORM HAS WEAKEN.

LAT...LON 2458 8160 2463 8150 2461 8147 2463 8150
      2468 8152 2471 8157 2473 8158 2473 8159
      2471 8160 2470 8156 2466 8159 2468 8165
      2471 8166 2468 8171 2466 8169 2468 8168
      2466 8163 2462 8163 2462 8165
TIME...MOT...LOC 0218Z 140DEG 15KT 2479 8170

$$
JOHNSON

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 16, 10:12 PM EDTAreal Flood AdvisoryKEYMonroe2 hr
Oct 16, 10:52 PM EDTSpecial Marine WarningKEY23 min
Oct 17, 12:08 AM EDTSpecial Marine WarningKEY31 min
Oct 17, 12:25 AM EDTSpecial Marine WarningKEY50 min
Oct 17, 12:56 AM EDTSpecial Marine WarningKEY49 min
Oct 17, 3:58 AM EDTAreal Flood AdvisoryKEYMonroe107 min
Oct 17, 4:54 AM EDTSpecial Marine WarningKEY66 min
Oct 17, 5:10 AM EDTSpecial Marine WarningKEY50 min
Oct 17, 5:46 AM EDTAreal Flood AdvisoryKEYMonroe119 min
Oct 17, 5:58 AM EDTSpecial Marine WarningKEY62 min
Oct 17, 6:07 AM EDTSpecial Marine WarningKEY68 min
Oct 17, 6:26 AM EDTSpecial Marine WarningKEY64 min
Oct 17, 7:01 AM EDTSpecial Marine WarningKEY59 min
Oct 17, 7:23 AM EDTSpecial Marine WarningKEY67 min
Oct 17, 7:35 AM EDTSpecial Marine WarningKEY55 min
Oct 17, 7:40 AM EDTAreal Flood AdvisoryKEYMonroe9 hr
Oct 17, 8:31 AM EDTSpecial Marine WarningKEY59 min
Oct 17, 8:37 AM EDTSpecial Marine WarningKEY53 min
Oct 17, 8:42 AM EDTSpecial Marine WarningKEY63 min
Oct 17, 10:02 AM EDTSpecial Marine WarningKEY33 min
Oct 17, 10:59 AM EDTSpecial Marine WarningKEY61 min
Oct 17, 12:15 PM EDTSpecial Marine WarningKEY37 min
Oct 17, 1:14 PM EDTSpecial Marine WarningKEY31 min
Oct 17, 4:30 PM EDTAreal Flood AdvisoryKEYMonroe3 hr
Oct 17, 4:49 PM EDTSmall Craft AdvisoryKEY43 hr
Oct 17, 5:40 PM EDTSpecial Marine WarningKEY50 min
Oct 17, 6:29 PM EDTSpecial Marine WarningKEY46 min

Nearby

Tornado Warnings in Florida, 2011Every tornado warning in 2011Tornadoes in 2011

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.