Alert archive / Florida / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 90, NWS Miami, FL

July 21, 2023Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jul 21, 2023, 2:48 PM EDT for Broward County, Miami-Dade County, Florida. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 21, 2023, 2:48 PM EDT (18:48 UTC)
Expired: Jul 21, 2023, 3:15 PM EDT
In force: 27 min
Issued by: NWS Miami, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Broward County, FL, Miami-Dade County, FL

The radar

The Miami radar (KAMX), 31 km from the middle of the area, began a volume at 18:47 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

Tampa Bay, FL (KTBW), launched 12:00Z, 6.8 hours before the alert went out and 279 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: 1605 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 1144 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: 30 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Miami, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 21, 1:10 PM EDT, 1 hour 38 minutes earlier.

Area forecast discussion, Jul 21, 1:10 PM EDT, 1 hour 38 minutes before

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Hazardous weather outlook, Jul 21, 1:11 PM EDT, 1 hour 37 minutes before

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In the hours before

Special weather statement, Jul 21, 2:36 PM EDT, 12 minutes before

Special Weather Statement
National Weather Service Miami FL
236 PM EDT Fri Jul 21 2023

FLZ071>074-172-173-211900-
Inland Broward County FL-Coastal Broward County FL-
Metropolitan Miami Dade FL-Metro Broward County FL-Inland Miami-
Dade County FL-Coastal Miami Dade County FL-
236 PM EDT Fri Jul 21 2023

...A strong thunderstorm will impact portions of northern Miami-Dade
and Broward Counties through 300 PM EDT...

At 236 PM EDT, National Weather Service meteorologists were tracking
a strong thunderstorm capable of producing a funnel cloud over
Miramar Parkway And University Drive, or near Pembroke Pines, moving
north at 10 mph.

HAZARD...Funnel clouds and winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Funnel clouds occasionally touch down and produce tornadoes
         or waterspouts. Gusty winds could knock down tree limbs and
         blow around unsecured objects.

Locations impacted include...
Hialeah, Fort Lauderdale, Pembroke Pines, Hollywood, Miramar, Coral
Springs, Pompano Beach, Davie, Plantation, Sunrise, Tamarac, Margate,
Miami Gardens, Hallandale, Lauderhill, Weston, North Miami, Coconut
Creek, North Miami Beach and Oakland Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

Funnel clouds occasionally touch down and produce tornadoes or
waterspouts. Move indoors and stay away from windows.

&&

LAT...LON 2590 8015 2588 8036 2615 8044 2629 8024
      2627 8013
TIME...MOT...LOC 1836Z 168DEG 10KT 2601 8027

FUNNEL CLOUD...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

CWC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 2:22 AM EDT	Excessive Heat Warning	MFL	Broward, Collier, Miami-Dade	16 hr
Jul 21, 2:22 AM EDT	Heat Advisory	MFL	Broward, Collier, Miami-Dade	5 days
Jul 21, 2:36 PM EDT	Areal Flood Advisory	MFL	Miami-Dade	54 min
Jul 21, 2:36 PM EDT	Special Weather Statement	MFL	Broward	24 min
Jul 21, 3:12 PM EDT	Areal Flood Advisory	MFL	Broward	109 min
Jul 21, 3:15 PM EDT	Special Weather Statement	MFL	Broward	30 min
Jul 21, 3:34 PM EDT	Special Weather Statement	MFL	Palm Beach	41 min
Jul 21, 3:55 PM EDT	Areal Flood Advisory	MFL	Palm Beach	2 hr
Jul 21, 4:14 PM EDT	Special Marine Warning	MFL		31 min
Jul 21, 4:19 PM EDT	Special Weather Statement	MFL	Palm Beach	26 min
Jul 21, 5:20 PM EDT	Special Weather Statement	MFL	Palm Beach	25 min
Jul 21, 5:54 PM EDT	Special Weather Statement	MFL	Glades	36 min
Jul 21, 6:11 PM EDT	Severe Thunderstorm Warning	MFL	Glades	19 min
Jul 21, 6:30 PM EDT	Special Weather Statement	MFL	Glades	45 min

Nearby

Severe Thunderstorm Warnings in Florida, 2023 Every severe thunderstorm warning 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.