Alert archive / Florida / Tornado Warnings in 2021

Tornado Warning 1, NWS Key West, FL

July 24, 2021Monroe County, Florida

NWS Key West, FL issued this tornado warning at Jul 24, 2021, 2:37 PM EDT for Monroe County, Florida. It was in force for 23 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: Jul 24, 2021, 2:37 PM EDT (18:37 UTC)
Expired: Jul 24, 2021, 3:00 PM EDT
In force: 23 min
Issued by: NWS Key West, FL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Monroe County, FL

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 6.6 hours before the alert went out and 93 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 875 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1024 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

661 
WFUS52 KKEY 241837
TORKEY
FLC087-241900-
/O.NEW.KKEY.TO.W.0001.210724T1837Z-210724T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Key West FL
237 PM EDT Sat Jul 24 2021

The National Weather Service in Key West has issued a

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

* Until 300 PM EDT..

* At 237 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Plantation, or 9 miles southwest of Key Largo,
  moving southeast at 10 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.

* Locations impacted include...
  Key Largo, Plantation, Rock Harbor, Upper Matecumbe Key, Windley
  Key and Islamorada.

This includes US 1 between mile markers 81 and 98. 

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.

Waterspouts that move onshore are dangerous and can be deadly. If
threatening weather approaches, SEEK SHELTER IMMEDIATELY!

&&

LAT...LON 2493 8055 2487 8065 2494 8065 2507 8050
      2511 8052 2512 8051 2513 8048 2504 8043
TIME...MOT...LOC 1837Z 335DEG 9KT 2506 8056 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

NB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 2:14 PM EDT	Special Marine Warning	KEY		31 min
Jul 24, 2:25 PM EDT	Special Marine Warning	KEY		65 min
Jul 24, 2:47 PM EDT	Special Marine Warning	KEY		15 min
Jul 24, 3:01 PM EDT	Tornado Warning	KEY	Monroe	14 min
Jul 24, 4:03 PM EDT	Special Marine Warning	KEY		45 min

Nearby

Tornado Warnings in Florida, 2021 Every tornado warning in 2021 Tornadoes in 2021

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.