Alert archive / Florida / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 42, NWS Miami, FL

May 31, 2023Miami-Dade County, Monroe County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 31, 2023, 4:04 PM EDT for Miami-Dade County, Monroe County, Florida. It was in force for 26 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: May 31, 2023, 4:04 PM EDT (20:04 UTC)
Expired: May 31, 2023, 4:30 PM EDT
In force: 26 min
Issued by: NWS Miami, FL
Area: Storm-based polygon
Tornado: Possible
Hail: 0.88 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 20:06 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, 8.1 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: 78 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 1196 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 123 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 May 31, 2:48 PM EDT, 1 hour 16 minutes earlier.

Area forecast discussion, May 31, 2:48 PM EDT, 1 hour 16 minutes before

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Hazardous weather outlook, May 31, 9:48 AM EDT, 6 hours 16 minutes before

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In the hours before

Special weather statement, May 31, 10:58 AM EDT, 5 hours 6 minutes before

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Special weather statement, May 31, 2:53 PM EDT, 1 hour 11 minutes before

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Special weather statement, May 31, 3:43 PM EDT, 21 minutes before

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Special weather statement, May 31, 3:57 PM EDT, 7 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
May 30, 8:01 PM EDT	Special Weather Statement	MFL	Broward	29 min
May 30, 8:08 PM EDT	Special Weather Statement	MFL	Miami-Dade	22 min
May 30, 8:24 PM EDT	Special Weather Statement	MFL	Miami-Dade	36 min
May 30, 8:25 PM EDT	Special Marine Warning	MFL		65 min
May 30, 8:35 PM EDT	Special Weather Statement	MFL	Broward	25 min
May 30, 8:37 PM EDT	Special Weather Statement	MFL	Miami-Dade	23 min
May 30, 8:41 PM EDT	Areal Flood Advisory	MFL	Miami-Dade	2 hr
May 30, 8:49 PM EDT	Areal Flood Advisory	MFL	Broward	116 min
May 30, 9:02 PM EDT	Special Weather Statement	MFL	Broward	28 min
May 30, 9:17 PM EDT	Areal Flood Advisory	MFL	Broward	118 min
May 30, 9:35 PM EDT	Special Weather Statement	MFL	Broward	40 min
May 30, 9:40 PM EDT	Special Marine Warning	MFL		50 min
May 31, 10:30 AM EDT	Special Marine Warning	MFL		30 min
May 31, 10:58 AM EDT	Special Weather Statement	MFL	Broward	32 min
May 31, 11:41 AM EDT	Flood Watch	MFL	Broward, Glades, Hendry, Miami-Dade, Palm Beach	4 days
May 31, 2:53 PM EDT	Special Weather Statement	MFL	Palm Beach	37 min
May 31, 3:43 PM EDT	Special Weather Statement	MFL	Collier	47 min
May 31, 3:57 PM EDT	Special Weather Statement	MFL	Miami-Dade	48 min
May 31, 4:25 PM EDT	Severe Thunderstorm Warning	MFL	Miami-Dade	20 min
May 31, 4:32 PM EDT	Special Weather Statement	MFL	Hendry	43 min
May 31, 4:43 PM EDT	Areal Flood Advisory	MFL	Broward	2 hr
May 31, 4:45 PM EDT	Special Weather Statement	MFL	Miami-Dade	45 min
May 31, 4:49 PM EDT	Special Marine Warning	MFL		56 min
May 31, 5:03 PM EDT	Special Weather Statement	MFL	Broward	42 min
May 31, 5:15 PM EDT	Special Weather Statement	MFL	Glades	30 min
May 31, 5:20 PM EDT	Areal Flood Advisory	MFL	Broward	115 min
May 31, 5:59 PM EDT	Special Marine Warning	MFL		46 min
May 31, 7:04 PM EDT	Special Weather Statement	MFL	Hendry	26 min
May 31, 7:31 PM EDT	Areal Flood Advisory	MFL	Collier	119 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.