Alert archive / Georgia / Freeze Warnings in 2012

Freeze Warning 12, NWS Jacksonville, FL

December 21, 20127 counties in Florida; 12 counties in Georgia

NWS Jacksonville, FL issued this freeze warning at Dec 21, 2012, 3:44 AM EST for 7 counties in Florida; 12 counties in Georgia. It took effect at Dec 22, 2012, 2:00 AM EST. It was in force for 7 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Dec 21, 2012, 3:44 AM EST (08:44 UTC)
In effect from: Dec 22, 2012, 2:00 AM EST
Expired: Dec 22, 2012, 9:00 AM EST
In force: 7 hr
Issued by: NWS Jacksonville, FL

Counties Baker County, FL, Bradford County, FL, Flagler County, FL, Gilchrist County, FL, Nassau County, FL, Suwannee County, FL, Union County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Brantley County, GA, Camden County, GA, Clinch County, GA, Coffee County, GA, Echols County, GA, Glynn County, GA, Jeff Davis County, GA, Pierce County, GA, Wayne County, GA

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 8.7 hours before the alert went out and 69 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: 59 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 1049 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 322 m²/s²
0-3 km storm-relative helicity: 421 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this freeze warning 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 freeze warning went out at Dec 20, 8:49 PM EST, 6 hours 55 minutes earlier.

Area forecast discussion, Dec 20, 8:49 PM EST, 6 hours 55 minutes before

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Hazardous weather outlook, Dec 20, 10:40 PM EST, 5 hours 4 minutes before

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In the hours before

Special weather statement, Dec 20, 11:00 PM EST, 4 hours 44 minutes before

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Special weather statement, Dec 20, 11:45 PM EST, 3 hours 59 minutes before

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Local storm report, Dec 21, 12:38 AM EST, 3 hours 6 minutes before

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Local storm report, Dec 21, 12:47 AM EST, 2 hours 57 minutes before

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Local storm report, Dec 21, 12:55 AM EST, 2 hours 49 minutes before

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Local storm report, Dec 21, 1:17 AM EST, 2 hours 27 minutes before

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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 20, 7:09 PM EST	Special Weather Statement	JAX	Union	51 min
Dec 20, 7:21 PM EST	Special Weather Statement	JAX	Alachua, Gilchrist	39 min
Dec 20, 8:00 PM EST	Special Weather Statement	JAX	Alachua, Bradford, Clay, Putnam	45 min
Dec 20, 8:45 PM EST	Special Weather Statement	JAX	Clay, Flagler, Marion, Putnam, Saint Johns	60 min
Dec 20, 9:49 PM EST	Special Weather Statement	JAX	Flagler	41 min
Dec 20, 10:01 PM EST	Special Weather Statement	JAX	Baker, Bradford, Clay, Columbia, Duval, Nassau and 1 more	59 min
Dec 20, 11:00 PM EST	Special Weather Statement	JAX	Bradford, Clay, Duval, Saint Johns	45 min
Dec 20, 11:45 PM EST	Special Weather Statement	JAX	Marion, Putnam, Saint Johns	45 min
Dec 21, 3:44 AM EST	Freeze Watch	JAX	Baker, Bradford, Gilchrist, Nassau, Suwannee, Union	25 hr
Dec 20, 8:10 PM EST	Special Weather Statement	JAX	Glynn	35 min

Nearby

Freeze Warnings in Georgia, 2012 Freeze Warnings in Florida, 2012 Every freeze warning 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.