Alert archive / Florida / Special Weather Statements in 2012

Special Weather Statement, NWS Melbourne, FL

April 21, 2012Orange County, Seminole County, Volusia County, Florida

NWS Melbourne, FL issued this special weather statement at Apr 21, 2012, 5:52 PM EDT for Orange County, Seminole County, Volusia County, Florida. It was in force for 53 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: Apr 21, 2012, 5:52 PM EDT (21:52 UTC)
Expired: Apr 21, 2012, 6:45 PM EDT
In force: 53 min
Issued by: NWS Melbourne, FL

Counties Orange County, FL, Seminole County, FL, Volusia County, FL

The radar

The Melbourne radar (KMLB), 118 km from the middle of the area, began a volume at 21:55 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

Jacksonville, FL (KJAX), launched 12:00Z, 9.9 hours before the alert went out and 170 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: 716 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 745 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Melbourne, FL wrote its last area forecast discussion before this special weather statement went out at Apr 21, 3:46 PM EDT, 2 hours 6 minutes earlier.

Area forecast discussion, Apr 21, 3:46 PM EDT, 2 hours 6 minutes before

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Hazardous weather outlook, Apr 21, 11:10 AM EDT, 6 hours 42 minutes before

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In the hours before

Local storm report, Apr 21, 2:48 PM EDT, 3 hours 4 minutes before

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Local storm report, Apr 21, 3:40 PM EDT, 2 hours 12 minutes before

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Local storm report, Apr 21, 4:12 PM EDT, 1 hour 40 minutes before

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Local storm report, Apr 21, 5:30 PM EDT, 22 minutes before

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Special weather statement, Apr 21, 5:33 PM EDT, 19 minutes before

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Special weather statement, Apr 21, 5:52 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 21, 4:35 AM EDT	Small Craft Advisory for Winds	MLB		65 hr
Apr 21, 5:33 PM EDT	Special Weather Statement	MLB	Lake	42 min

Nearby

Special Weather Statements in Florida, 2012 Every special weather statement in 2012

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.