Alert archive / Florida / Special Weather Statements in 2012

Special Weather Statement, NWS Jacksonville, FL

July 31, 2012Columbia County, Florida

NWS Jacksonville, FL issued this special weather statement at Jul 31, 2012, 2:49 PM EDT for Columbia County, Florida. It was in force for 41 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: Jul 31, 2012, 2:49 PM EDT (18:49 UTC)
Expired: Jul 31, 2012, 3:30 PM EDT
In force: 41 min
Issued by: NWS Jacksonville, FL

County Columbia County, FL

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 6.8 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: 431 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 1025 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 51 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 Jacksonville, FL wrote its last area forecast discussion before this special weather statement went out at Jul 31, 2:33 PM EDT, 16 minutes earlier.

Area forecast discussion, Jul 31, 2:33 PM EDT, 16 minutes before

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Hazardous weather outlook, Jul 31, 2:30 PM EDT, 19 minutes before

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In the hours before

Local storm report, Jul 31, 10:22 AM EDT, 4 hours 27 minutes before

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Local storm report, Jul 31, 10:27 AM EDT, 4 hours 22 minutes before

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Local storm report, Jul 31, 10:44 AM EDT, 4 hours 5 minutes before

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Special weather statement, Jul 31, 2:16 PM EDT, 33 minutes before

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Special weather statement, Jul 31, 2:36 PM EDT, 13 minutes before

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Special weather statement, Jul 31, 2:49 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 2:16 PM EDT	Special Weather Statement	JAX	Nassau	29 min
Jul 31, 2:36 PM EDT	Special Weather Statement	JAX	Baker	24 min
Jul 31, 2:53 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Duval, Nassau	26 min
Jul 31, 3:00 PM EDT	Special Marine Warning	JAX		90 min
Jul 31, 3:35 PM EDT	Special Weather Statement	JAX	Baker	25 min
Jul 31, 3:53 PM EDT	Special Marine Warning	JAX		97 min
Jul 31, 4:14 PM EDT	Special Weather Statement	JAX	Nassau	46 min
Jul 31, 4:28 PM EDT	Special Marine Warning	JAX		92 min
Jul 31, 5:15 PM EDT	Special Marine Warning	JAX		90 min
Jul 30, 8:03 PM EDT	Special Weather Statement	JAX	Appling, Bacon, Jeff Davis, Wayne	42 min
Jul 30, 8:44 PM EDT	Special Weather Statement	JAX	Appling, Bacon	46 min
Jul 30, 9:16 PM EDT	Severe Thunderstorm Warning	JAX	Appling, Bacon, Coffee, Pierce, Ware	44 min
Jul 30, 9:29 PM EDT	Special Weather Statement	JAX	Coffee	31 min
Jul 30, 9:40 PM EDT	Severe Thunderstorm Warning	JAX	Bacon, Coffee, Ware	50 min
Jul 30, 10:12 PM EDT	Severe Thunderstorm Warning	JAX	Atkinson, Coffee	34 min
Jul 31, 2:57 PM EDT	Special Weather Statement	JAX	Camden	48 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.