Alert archive / Florida / Tornado Warnings in 2024

Tornado Warning 4, NWS Key West, FL

March 23, 2024Monroe County, Florida

NWS Key West, FL issued this tornado warning at Mar 23, 2024, 11:36 AM 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
Mar 23, 2024, 11:36 AM EDT (15:36 UTC)
Expired
Mar 23, 2024, 11:50 AM EDT
In force
14 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), 34 km from the middle of the area, began a volume at 15:40 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, 3.6 hours before the alert went out and 36 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 2024-03-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2148 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 2024-03-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 310 square meters per square second.19395878Sfc1 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
2148 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
548 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
310 m²/s²
0-3 km storm-relative helicity
386 m²/s²
Significant tornado parameter
5.3
Supercell composite
17.1

Open this sounding in Storm Lab

The text

As transmitted.

098 
WFUS52 KKEY 231536
TORKEY
FLC087-231600-
/O.NEW.KKEY.TO.W.0004.240323T1536Z-240323T1600Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Key West FL
1136 AM EDT Sat Mar 23 2024

The National Weather Service in Key West has issued a

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

* Until noon EDT.

* At 1135 AM EDT, a severe thunderstorm capable of producing a
  tornado was located over Upper Sugarloaf Key, or 8 miles west of
  Niles Channel Bridge, moving east at 45 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...
  Niles Channel Bridge, Summerland Key, Upper Sugarloaf Key, Cudjoe 
  Key, Ramrod Key, and Big Torch Key around 1140 AM EDT.
  Little Palm Island Resort, Middle Torch Key, Little Torch Key, and 
  Big Pine Key around 1145 AM EDT.
  Spanish Harbor Channel Bridge around 1150 AM EDT.
  Bahia Honda Channel Bridge and Bahia Honda Key around 1155 AM EDT.

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

This includes US 1 between mile markers 17 and 41. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to 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 2465 8163 2471 8162 2473 8161 2476 8126
      2469 8128 2471 8123 2469 8121 2467 8122
      2464 8123 2461 8132
TIME...MOT...LOC 1535Z 273DEG 37KT 2468 8156 

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

$$

JAM
1 follow-up statement
801 
WWUS52 KKEY 231550
SVSKEY

Severe Weather Statement
National Weather Service Key West FL
1150 AM EDT Sat Mar 23 2024

FLC087-231559-
/O.CAN.KKEY.TO.W.0004.000000T0000Z-240323T1600Z/
Lower Keys in Monroe FL-
1150 AM EDT Sat Mar 23 2024

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

The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.

&&

LAT...LON 2465 8163 2471 8162 2473 8161 2476 8126
      2469 8128 2471 8123 2469 8121 2467 8122
      2464 8123 2461 8132
TIME...MOT...LOC 1548Z 273DEG 37KT 2467 8139 

$$

JAM

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 22, 8:10 PM EDTSpecial Marine WarningKEY65 min
Mar 22, 8:12 PM EDTSpecial Marine WarningKEY63 min
Mar 22, 8:15 PM EDTSpecial Marine WarningKEY60 min
Mar 22, 8:37 PM EDTSpecial Marine WarningKEY27 min
Mar 22, 8:49 PM EDTSpecial Marine WarningKEY24 min
Mar 22, 9:11 PM EDTSpecial Marine WarningKEY64 min
Mar 22, 9:21 PM EDTSpecial Marine WarningKEY54 min
Mar 22, 9:36 PM EDTSpecial Marine WarningKEY21 min
Mar 22, 10:19 PM EDTSpecial Marine WarningKEY56 min
Mar 22, 10:35 PM EDTSpecial Marine WarningKEY55 min
Mar 22, 11:28 PM EDTSpecial Marine WarningKEY41 min
Mar 23, 12:02 AM EDTSpecial Marine WarningKEY28 min
Mar 23, 12:23 AM EDTSpecial Marine WarningKEY52 min
Mar 23, 12:36 AM EDTSpecial Marine WarningKEY54 min
Mar 23, 1:57 AM EDTSpecial Marine WarningKEY63 min
Mar 23, 2:21 AM EDTSpecial Marine WarningKEY33 min
Mar 23, 2:52 AM EDTSpecial Marine WarningKEY38 min
Mar 23, 3:53 AM EDTSpecial Marine WarningKEY26 min
Mar 23, 5:47 AM EDTSpecial Marine WarningKEY43 min
Mar 23, 6:10 AM EDTSpecial Marine WarningKEY28 min
Mar 23, 6:25 AM EDTSpecial Marine WarningKEY31 min
Mar 23, 6:37 AM EDTSpecial Marine WarningKEY38 min
Mar 23, 7:13 AM EDTSpecial Marine WarningKEY34 min
Mar 23, 7:22 AM EDTSpecial Marine WarningKEY38 min
Mar 23, 7:34 AM EDTSpecial Marine WarningKEY41 min
Mar 23, 7:46 AM EDTSpecial Marine WarningKEY4 min
Mar 23, 7:50 AM EDTSpecial Marine WarningKEY40 min
Mar 23, 7:54 AM EDTSpecial Marine WarningKEY51 min
Mar 23, 8:00 AM EDTSpecial Marine WarningKEY45 min
Mar 23, 8:05 AM EDTSpecial Weather StatementKEY25 min
Mar 23, 8:15 AM EDTSpecial Marine WarningKEY60 min
Mar 23, 8:18 AM EDTSpecial Marine WarningKEY57 min
Mar 23, 8:32 AM EDTSpecial Marine WarningKEY58 min
Mar 23, 8:42 AM EDTSpecial Marine WarningKEY49 min
Mar 23, 9:12 AM EDTSpecial Marine WarningKEY48 min
Mar 23, 9:16 AM EDTSpecial Marine WarningKEY59 min
Mar 23, 9:30 AM EDTSpecial Marine WarningKEY45 min
Mar 23, 10:00 AM EDTSpecial Marine WarningKEY60 min
Mar 23, 10:09 AM EDTSpecial Marine WarningKEY66 min
Mar 23, 10:15 AM EDTSpecial Marine WarningKEY60 min
Mar 23, 11:00 AM EDTSpecial Marine WarningKEY60 min
Mar 23, 11:08 AM EDTSpecial Marine WarningKEY67 min
Mar 23, 11:33 AM EDTSpecial Weather StatementKEY27 min
Mar 23, 11:41 AM EDTSpecial Marine WarningKEY64 min
Mar 23, 11:46 AM EDTSpecial Marine WarningKEY59 min
Mar 23, 11:57 AM EDTSpecial Weather StatementKEYMiami-Dade33 min
Mar 23, 12:01 PM EDTSpecial Marine WarningKEY44 min
Mar 23, 12:46 PM EDTSpecial Marine WarningKEY59 min
Mar 23, 1:45 PM EDTSpecial Marine WarningKEY60 min

Nearby

Tornado Warnings in Florida, 2024Every tornado warning in 2024Tornadoes in 2024

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.