Alert archive / Florida / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 20, NWS Miami, FL

April 20, 2026Miami-Dade County, Monroe County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Apr 20, 2026, 5:56 PM EDT for Miami-Dade County, Monroe County, Florida. It was in force for 11 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: Apr 20, 2026, 5:56 PM EDT (21:56 UTC)
Expired: Apr 20, 2026, 6:07 PM EDT
In force: 11 min
Issued by: NWS Miami, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Miami-Dade County, FL, Monroe County, FL

The radar

The Miami radar (KAMX), 30 km from the middle of the area, began a volume at 21:57 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, 9.9 hours before the alert went out and 290 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1016 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 81 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 Apr 20, 3:18 PM EDT, 2 hours 38 minutes earlier.

Area forecast discussion, Apr 20, 3:18 PM EDT, 2 hours 38 minutes before

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In the hours before

Special weather statement, Apr 20, 4:08 PM EDT, 1 hour 48 minutes before

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Special weather statement, Apr 20, 4:09 PM EDT, 1 hour 47 minutes before

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Special weather statement, Apr 20, 5:01 PM EDT, 55 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 2:31 AM EDT	Small Craft Advisory	MFL		59 hr
Apr 20, 2:34 AM EDT	Rip Current Statement	MFL	Broward, Miami-Dade, Palm Beach	5 days
Apr 20, 2:34 AM EDT	High Surf Advisory	MFL	Palm Beach	41 hr
Apr 20, 4:49 AM EDT	Special Weather Statement	MFL	Palm Beach	26 min
Apr 20, 3:51 PM EDT	Fire Weather Watch	MFL	Collier, Glades, Hendry	19 hr
Apr 20, 4:08 PM EDT	Special Weather Statement	MFL	Collier	37 min
Apr 20, 4:09 PM EDT	Special Weather Statement	MFL	Miami-Dade	36 min
Apr 20, 5:01 PM EDT	Special Weather Statement	MFL	Broward	29 min
Apr 20, 5:18 PM EDT	Special Marine Warning	MFL		27 min
Apr 20, 5:57 PM EDT	Special Marine Warning	MFL		33 min

Nearby

Severe Thunderstorm Warnings in Florida, 2026 Every severe thunderstorm warning in 2026

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.