Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 1, NWS Miami, FL

February 7, 2021Glades County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Feb 7, 2021, 11:13 AM EST for Glades County, Florida. It was in force for 32 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
Feb 7, 2021, 11:13 AM EST (16:13 UTC)
Expired
Feb 7, 2021, 11:45 AM EST
In force
32 min
Issued by
NWS Miami, FL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Glades County, FL

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 4.2 hours before the alert went out and 155 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, Cape Canaveral, FL at 12:00Z on 2021-02-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 965 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, Cape Canaveral, FL at 12:00Z on 2021-02-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 277 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
965 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
641 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
277 m²/s²
0-3 km storm-relative helicity
236 m²/s²
Significant tornado parameter
1.6
Supercell composite
6.8

Open this sounding in Storm Lab

The text

As transmitted.

477 
WUUS52 KMFL 071613
SVRMFL
FLC043-071645-
/O.NEW.KMFL.SV.W.0001.210207T1613Z-210207T1645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
1113 AM EST Sun Feb 7 2021

The National Weather Service in Miami has issued a

* Severe Thunderstorm Warning for...
  Northeastern Glades County in southern Florida...

* Until 1145 AM EST.

* At 1112 AM EST, a severe thunderstorm was located over Brighton
  Seminole Reservation, or 9 miles west of Buckhead Ridge, moving
  east at 25 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Buckhead Ridge, Brighton Seminole Reservation and Okee Tantie
  Recreation Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Miami. You can also share your report with NWS Miami on
Facebook and Twitter.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2719 8092 2717 8090 2716 8088 2715 8087
      2715 8086 2698 8107 2700 8123 2720 8111
      2721 8096
TIME...MOT...LOC 1612Z 275DEG 23KT 2712 8104 

HAIL...0.75IN
WIND...60MPH
 
$$

AR

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 7, 10:35 AM ESTSpecial Weather StatementMFLGlades55 min
Feb 7, 10:54 AM ESTSpecial Marine WarningMFL36 min
Feb 7, 11:14 AM ESTSpecial Marine WarningMFL46 min
Feb 7, 12:44 PM ESTSpecial Weather StatementMFLMartin46 min
Feb 7, 2:05 PM ESTSpecial Marine WarningMFL25 min
Feb 7, 2:29 PM ESTSpecial Marine WarningMFL31 min

Nearby

Severe Thunderstorm Warnings in Florida, 2021Every severe thunderstorm warning 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.