Alert archive / Florida / Special Weather Statements in 2011

Special Weather Statement, NWS Miami, FL

May 12, 2011Miami-Dade County, Florida

NWS Miami, FL issued this special weather statement at May 12, 2011, 2:15 PM EDT for Miami-Dade County, Florida. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 12, 2011, 2:15 PM EDT (18:15 UTC)
Expired: May 12, 2011, 3:00 PM EDT
In force: 45 min
Issued by: NWS Miami, FL

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 44 km from the middle of the area, began a volume at 18:17 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, 6.3 hours before the alert went out and 70 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: 1881 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 978 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 8 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at May 12, 10:07 AM EDT, 4 hours 8 minutes earlier.

Area forecast discussion, May 12, 10:07 AM EDT, 4 hours 8 minutes before

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Hazardous weather outlook, May 12, 9:45 AM EDT, 4 hours 30 minutes before

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In the hours before

Special weather statement, May 12, 1:40 PM EDT, 35 minutes before

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Special weather statement, May 12, 2:15 PM EDT, 0 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 12, 3:01 AM EDT	Red Flag Warning	MFL	Broward	17 hr
May 12, 10:18 AM EDT	Small Craft Advisory for Hazardous Seas	MFL		42 hr
May 12, 1:40 PM EDT	Special Weather Statement	MFL	Miami-Dade	50 min
May 12, 2:27 PM EDT	Severe Thunderstorm Warning	MFL	Miami-Dade	33 min
May 12, 2:46 PM EDT	Special Weather Statement	MFL	Collier	44 min
May 12, 3:02 PM EDT	Special Weather Statement	MFL	Miami-Dade	58 min
May 12, 3:24 PM EDT	Special Weather Statement	MFL	Collier	66 min
May 12, 3:47 PM EDT	Special Weather Statement	MFL	Monroe	58 min
May 12, 3:49 PM EDT	Severe Thunderstorm Warning	MFL	Miami-Dade, Monroe	28 min
May 12, 6:51 PM EDT	Special Weather Statement	MFL	Collier	24 min
May 12, 7:33 PM EDT	Special Weather Statement	MFL	Collier	27 min
May 12, 7:47 PM EDT	Special Marine Warning	MFL		28 min

Nearby

Special Weather Statements in Florida, 2011 Every special weather statement in 2011

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.