Alert archive / Florida / Special Weather Statements in 2017

Special Weather Statement, NWS Melbourne, FL

September 11, 2017Lake County, Florida

NWS Melbourne, FL issued this special weather statement at Sep 11, 2017, 3:00 AM EDT for Lake County, Florida. It was in force for 90 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: Sep 11, 2017, 3:00 AM EDT (07:00 UTC)
Expired: Sep 11, 2017, 4:30 AM EDT
In force: 90 min
Issued by: NWS Melbourne, FL

County Lake County, FL

The radar

The Melbourne radar (KMLB), 133 km from the middle of the area, began a volume at 06:59 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

Jacksonville, FL (KJAX), launched 00:00Z, 7.0 hours before the alert went out and 164 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: 270 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 514 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 282 m²/s²
0-3 km storm-relative helicity: 319 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.9

Open this sounding in Storm Lab

The text

As transmitted.

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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 Sep 11, 12:33 AM EDT, 2 hours 27 minutes earlier.

Area forecast discussion, Sep 11, 12:33 AM EDT, 2 hours 27 minutes before

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In the hours before

Local storm report, Sep 11, 1:16 AM EDT, 1 hour 44 minutes before

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Local storm report, Sep 11, 1:21 AM EDT, 1 hour 39 minutes before

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Special weather statement, Sep 11, 1:33 AM EDT, 1 hour 27 minutes before

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Local storm report, Sep 11, 2:09 AM EDT, 51 minutes before

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Local storm report, Sep 11, 2:24 AM EDT, 36 minutes before

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Special weather statement, Sep 11, 3:00 AM 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
Sep 10, 8:09 PM EDT	Special Weather Statement	MLB	Brevard, Indian River, Orange, Osceola	51 min
Sep 10, 8:40 PM EDT	Tornado Warning	MLB	Brevard	35 min
Sep 10, 8:51 PM EDT	Tornado Warning	MLB	Lake, Seminole, Volusia	24 min
Sep 10, 9:01 PM EDT	Tornado Warning	MLB	Brevard	14 min
Sep 10, 9:06 PM EDT	Special Weather Statement	MLB	Brevard, Lake, Orange, Seminole, Volusia	54 min
Sep 10, 9:19 PM EDT	Tornado Warning	MLB	Volusia	26 min
Sep 10, 9:34 PM EDT	Tornado Warning	MLB	Lake, Volusia	26 min
Sep 10, 9:45 PM EDT	Tornado Warning	MLB	Brevard	15 min
Sep 10, 9:58 PM EDT	Flash Flood Warning	MLB	Brevard, Orange, Seminole, Volusia	107 min
Sep 10, 10:10 PM EDT	River Flood Warning	MLB	Brevard	53 days
Sep 10, 10:10 PM EDT	River Flood Warning	MLB	Lake, Volusia	60 days
Sep 10, 10:21 PM EDT	Tornado Warning	MLB	Brevard, Orange	24 min
Sep 10, 10:35 PM EDT	Tornado Warning	MLB	Volusia	25 min
Sep 10, 10:51 PM EDT	Tornado Warning	MLB	Brevard, Volusia	9 min
Sep 10, 11:27 PM EDT	Special Weather Statement	MLB	Lake	33 min
Sep 11, 12:01 AM EDT	Special Weather Statement	MLB	Lake, Orange, Osceola	89 min
Sep 11, 1:33 AM EDT	Special Weather Statement	MLB	Lake, Orange	87 min
Sep 11, 5:34 AM EDT	Tropical Storm Warning	MLB	Lake, Okeechobee, Orange, Osceola, Seminole, Volusia	10 hr
Sep 11, 11:21 AM EDT	Wind Advisory	MLB	Lake, Okeechobee, Orange, Osceola, Seminole, Volusia	7 hr
Sep 11, 11:29 AM EDT	Coastal Flood Statement	MLB	Volusia	17 hr
Sep 11, 3:59 PM EDT	Small Craft Advisory	MLB		18 hr

Nearby

Special Weather Statements in Florida, 2017 Every special weather statement in 2017

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.