Alert archive / Florida / Tornado Warnings in 2023

Tornado Warning 1, NWS Key West, FL

November 15, 2023Monroe County, Florida

NWS Key West, FL issued this tornado warning at Nov 15, 2023, 6:27 AM EST for Monroe County, Florida. It was in force for 33 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
Nov 15, 2023, 6:27 AM EST (11:27 UTC)
Expired
Nov 15, 2023, 7:00 AM EST
In force
33 min
Issued by
NWS Key West, FL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

County Monroe County, FL

The radar

The Key West radar (KBYX), 49 km from the middle of the area, began a volume at 11:30 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, 11.5 hours before the alert went out and 51 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 2023-11-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 123 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 00:00Z on 2023-11-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 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
123 J/kg
Mixed-layer CIN
-70 J/kg
Mixed-layer LCL
866 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
10 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

411 
WFUS52 KKEY 151127
TORKEY
FLC087-151200-
/O.NEW.KKEY.TO.W.0001.231115T1127Z-231115T1200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Key West FL
627 AM EST Wed Nov 15 2023

The National Weather Service in Key West has issued a

* Tornado Warning for...
  Lower Keys in Monroe County in Florida...
  Middle Keys in Monroe County in Florida...

* Until 700 AM EST.
    
* At 627 AM EST, a severe thunderstorm capable of producing a tornado
  was located over Big Pine Key, or near Niles Channel Bridge, moving
  northwest at 15 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Middle Torch Key, Big Pine Key, and Big Torch Key around 635 AM 
  EST.

Other locations impacted by this tornadic thunderstorm include No
Name Key and Key Colony Beach.

This includes US 1 between mile markers 27 and 53. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 2473 8147 2480 8137 2479 8133 2480 8128
      2476 8125 2469 8128 2471 8123 2469 8120
      2470 8119 2473 8117 2477 8104 2471 8101
      2467 8111 2467 8115 2469 8118 2468 8121
      2464 8123 2459 8138
TIME...MOT...LOC 1127Z 132DEG 12KT 2469 8137 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

JAM
2 follow-up statements
048 
WWUS52 KKEY 151129
SVSKEY

Severe Weather Statement
National Weather Service Key West FL
629 AM EST Wed Nov 15 2023

FLC087-151200-
/O.CON.KKEY.TO.W.0001.000000T0000Z-231115T1200Z/
Lower Keys in Monroe FL-
629 AM EST Wed Nov 15 2023

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 AM EST FOR LOWER
KEYS IN MONROE COUNTY...
    
At 628 AM EST, a severe thunderstorm capable of producing a tornado
was located over Big Pine Key, or near Niles Channel Bridge, moving
northwest at 15 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Middle Torch Key, Little Torch Key, Big Pine Key, Ramrod Key, and 
  Big Torch Key around 635 AM EST.

Other locations impacted by this tornadic thunderstorm include No
Name Key.

This includes US 1 between mile markers 27 and 35. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 2473 8147 2480 8137 2479 8133 2476 8132
      2473 8130 2469 8128 2466 8129 2464 8129
      2460 8136 2459 8138
TIME...MOT...LOC 1128Z 132DEG 12KT 2469 8138 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

JAM
029 
WWUS52 KKEY 151153
SVSKEY

Severe Weather Statement
National Weather Service Key West FL
653 AM EST Wed Nov 15 2023

FLC087-151202-
/O.EXP.KKEY.TO.W.0001.000000T0000Z-231115T1200Z/
Lower Keys in Monroe FL-
653 AM EST Wed Nov 15 2023

...THE TORNADO WARNING FOR LOWER KEYS IN MONROE COUNTY WILL EXPIRE AT
700 AM EST...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

LAT...LON 2473 8147 2480 8137 2479 8133 2476 8132
      2473 8130 2469 8128 2466 8129 2464 8129
      2460 8136 2459 8138
TIME...MOT...LOC 1152Z 132DEG 12KT 2473 8143 

$$

JAM

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 15, 6:30 AM ESTSpecial Marine WarningKEY24 min
Nov 15, 8:26 AM ESTFlood WatchKEYMonroe22 hr
Nov 15, 9:18 AM ESTSpecial Weather StatementKEY27 min
Nov 15, 10:54 AM ESTSpecial Marine WarningKEY43 min
Nov 15, 12:44 PM ESTAreal Flood AdvisoryKEYMonroe3 hr
Nov 15, 12:51 PM ESTSpecial Marine WarningKEY39 min
Nov 15, 1:12 PM ESTSpecial Marine WarningKEY48 min
Nov 15, 2:28 PM ESTSpecial Marine WarningKEY32 min
Nov 15, 2:57 PM ESTSpecial Marine WarningKEY48 min
Nov 15, 2:58 PM ESTSpecial Marine WarningKEY47 min
Nov 15, 3:27 PM ESTSpecial Marine WarningKEY48 min
Nov 15, 3:41 PM ESTSpecial Marine WarningKEY49 min
Nov 15, 3:45 PM ESTSpecial Marine WarningKEY17 min
Nov 15, 3:55 PM ESTSpecial Marine WarningKEY35 min
Nov 15, 4:07 PM ESTAreal Flood WarningKEYMonroe4 hr
Nov 15, 4:15 PM ESTSpecial Marine WarningKEY45 min
Nov 15, 4:26 PM ESTSpecial Marine WarningKEY49 min
Nov 15, 4:27 PM ESTSpecial Marine WarningKEY48 min
Nov 15, 4:33 PM ESTSpecial Marine WarningKEY42 min
Nov 15, 4:44 PM ESTSpecial Marine WarningKEY46 min
Nov 15, 5:01 PM ESTSpecial Marine WarningKEY44 min
Nov 15, 5:02 PM ESTSpecial Marine WarningKEY43 min
Nov 15, 5:04 PM ESTSpecial Marine WarningKEY41 min
Nov 15, 5:14 PM ESTSpecial Marine WarningKEY46 min
Nov 15, 5:14 PM ESTSpecial Marine WarningKEY46 min
Nov 15, 5:17 PM ESTSpecial Marine WarningKEY43 min
Nov 15, 5:22 PM ESTTornado WarningKEYMonroe23 min
Nov 15, 5:45 PM ESTSpecial Marine WarningKEY45 min
Nov 15, 5:45 PM ESTTornado WarningKEYMonroe15 min
Nov 15, 5:58 PM ESTSpecial Marine WarningKEY47 min
Nov 15, 6:25 PM ESTSpecial Marine WarningKEY12 min
Nov 15, 6:43 PM ESTAreal Flood WarningKEYMonroe11 hr
Nov 15, 6:44 PM ESTSpecial Marine WarningKEY31 min

Nearby

Tornado Warnings in Florida, 2023Every tornado warning in 2023Tornadoes in 2023

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.