Alert archive / Florida / Areal Flood Advisories in 2021

Areal Flood Advisory 103, NWS Miami, FL

August 3, 2021Miami-Dade County, Florida

NWS Miami, FL issued this areal flood advisory at Aug 3, 2021, 6:00 PM EDT for Miami-Dade County, Florida. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Aug 3, 2021, 6:00 PM EDT (22:00 UTC)
Expired: Aug 3, 2021, 9:30 PM EDT
In force: 4 hr
Issued by: NWS Miami, FL
Area: Storm-based polygon

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 9 km from the middle of the area, began a volume at 21:59 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

Miami, FL (KMFL), launched 12:00Z, 10.0 hours before the alert went out and 31 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: 1794 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 932 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 32 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 areal flood advisory 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 areal flood advisory went out at Aug 3, 3:36 PM EDT, 2 hours 24 minutes earlier.

Area forecast discussion, Aug 3, 3:36 PM EDT, 2 hours 24 minutes before

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Hazardous weather outlook, Aug 3, 4:20 PM EDT, 1 hour 40 minutes before

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In the hours before

Special weather statement, Aug 3, 4:15 PM EDT, 1 hour 45 minutes before

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Local storm report, Aug 3, 4:59 PM EDT, 1 hour 1 minute before

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Special weather statement, Aug 3, 5:07 PM EDT, 53 minutes before

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Special weather statement, Aug 3, 5:13 PM EDT, 47 minutes before

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Local storm report, Aug 3, 5:26 PM EDT, 34 minutes before

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Special weather statement, Aug 3, 5:56 PM EDT, 4 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
Aug 2, 9:55 PM EDT	Special Weather Statement	MFL	Hendry	50 min
Aug 2, 10:48 PM EDT	Special Weather Statement	MFL	Collier	42 min
Aug 3, 8:38 AM EDT	Special Marine Warning	MFL		25 min
Aug 3, 11:37 AM EDT	Special Weather Statement	MFL	Broward	38 min
Aug 3, 11:43 AM EDT	Special Weather Statement	MFL	Broward	32 min
Aug 3, 12:14 PM EDT	Special Weather Statement	MFL	Broward	61 min
Aug 3, 12:22 PM EDT	Severe Thunderstorm Warning	MFL	Broward	23 min
Aug 3, 12:35 PM EDT	Special Marine Warning	MFL		40 min
Aug 3, 12:39 PM EDT	Areal Flood Advisory	MFL	Broward	111 min
Aug 3, 1:08 PM EDT	Special Weather Statement	MFL	Palm Beach	37 min
Aug 3, 1:14 PM EDT	Special Marine Warning	MFL		46 min
Aug 3, 1:40 PM EDT	Special Marine Warning	MFL		35 min
Aug 3, 1:55 PM EDT	Areal Flood Advisory	MFL	Broward	2 hr
Aug 3, 2:53 PM EDT	Special Weather Statement	MFL	Hendry	37 min
Aug 3, 4:15 PM EDT	Special Weather Statement	MFL	Collier	60 min
Aug 3, 4:36 PM EDT	Areal Flood Advisory	MFL	Collier	54 min
Aug 3, 5:07 PM EDT	Special Weather Statement	MFL	Glades	38 min
Aug 3, 5:10 PM EDT	Special Marine Warning	MFL		35 min
Aug 3, 5:13 PM EDT	Special Weather Statement	MFL	Collier, Hendry	47 min
Aug 3, 5:56 PM EDT	Special Weather Statement	MFL	Collier	49 min
Aug 3, 6:07 PM EDT	Special Weather Statement	MFL	Broward	38 min
Aug 3, 6:41 PM EDT	Special Weather Statement	MFL	Broward, Palm Beach	34 min
Aug 3, 7:05 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Miami-Dade	40 min
Aug 3, 7:06 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Palm Beach	39 min
Aug 3, 7:25 PM EDT	Areal Flood Advisory	MFL	Broward, Miami-Dade	2 hr
Aug 3, 7:26 PM EDT	Special Marine Warning	MFL		64 min
Aug 3, 7:37 PM EDT	Areal Flood Advisory	MFL	Broward, Miami-Dade	113 min
Aug 3, 7:43 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Miami-Dade	32 min
Aug 3, 7:50 PM EDT	Areal Flood Advisory	MFL	Palm Beach	115 min
Aug 3, 7:50 PM EDT	Special Weather Statement	MFL	Palm Beach	40 min

Nearby

Areal Flood Advisories in Florida, 2021 Every areal flood advisory 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; radar from the NEXRAD Level II archive.