Alert archive / Florida / Areal Flood Advisories in 2009

Areal Flood Advisory 21, NWS Miami, FL

May 22, 2009Miami-Dade County, Florida

NWS Miami, FL issued this areal flood advisory at May 22, 2009, 11:06 AM EDT for Miami-Dade County, Florida. It was in force for 114 min.

The area

The counties it named.

The facts

Issued: May 22, 2009, 11:06 AM EDT (15:06 UTC)
Expired: May 22, 2009, 1:00 PM EDT
In force: 114 min
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 15:10 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, 3.1 hours before the alert went out and 300 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: 2092 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 488 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 35 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 May 22, 9:17 AM EDT, 1 hour 49 minutes earlier.

Area forecast discussion, May 22, 9:17 AM EDT, 1 hour 49 minutes before

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Hazardous weather outlook, May 22, 3:46 AM EDT, 7 hours 20 minutes before

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In the hours before

Special weather statement, May 22, 5:46 AM EDT, 5 hours 20 minutes before

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Special weather statement, May 22, 11:01 AM EDT, 5 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 22, 5:46 AM EDT	Special Weather Statement	MFL	Collier	59 min
May 22, 11:01 AM EDT	Special Weather Statement	MFL	Palm Beach	89 min
May 22, 11:19 AM EDT	Special Weather Statement	MFL	Miami-Dade	26 min
May 22, 12:00 PM EDT	Special Marine Warning	MFL		60 min
May 22, 12:57 PM EDT	Special Marine Warning	MFL		33 min
May 22, 2:08 PM EDT	Special Marine Warning	MFL		52 min
May 22, 2:40 PM EDT	Special Weather Statement	MFL	Lee	20 min
May 22, 3:29 PM EDT	Special Marine Warning	MFL		61 min
May 22, 6:22 PM EDT	Special Weather Statement	MFL	Collier	53 min
May 22, 6:28 PM EDT	Special Weather Statement	MFL	Collier	62 min
May 22, 6:59 PM EDT	Special Weather Statement	MFL	Collier	61 min

Nearby

Areal Flood Advisories in Florida, 2009 Every areal flood advisory in 2009

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.