Alert archive / Georgia / Excessive Heat Warnings in 2012

Excessive Heat Warning 1, NWS Jacksonville, FL

June 30, 20129 counties in Georgia

NWS Jacksonville, FL issued this excessive heat warning at Jun 30, 2012, 3:49 AM EDT for 9 counties in Georgia. It took effect at Jun 30, 2012, 12:00 PM EDT. 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: Jun 30, 2012, 3:49 AM EDT (07:49 UTC)
In effect from: Jun 30, 2012, 12:00 PM EDT
Expired: Jun 30, 2012, 7:00 PM EDT
In force: 7 hr
Issued by: NWS Jacksonville, FL

Counties Appling County, GA, Atkinson County, GA, Bacon County, GA, Brantley County, GA, Coffee County, GA, Glynn County, GA, Jeff Davis County, GA, Pierce County, GA, Wayne County, GA

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 7.8 hours before the alert went out and 268 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: 3226 J/kg
Mixed-layer CIN: -228 J/kg
Mixed-layer LCL: 1618 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 178 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this excessive heat 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 excessive heat warning went out at Jun 29, 7:50 PM EDT, 7 hours 59 minutes earlier.

Area forecast discussion, Jun 29, 7:50 PM EDT, 7 hours 59 minutes before

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Hazardous weather outlook, Jun 29, 9:00 PM EDT, 6 hours 49 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 3:49 AM EDT	Heat Advisory	JAX	Baker, Bradford, Nassau, Suwannee, Union	15 hr
Jun 30, 2:11 PM EDT	Excessive Heat Watch	JAX	Appling, Bacon, Brantley, Coffee, Glynn, Jeff Davis and 2 more	13 hr
Jun 30, 7:02 PM EDT	Excessive Heat Warning	JAX	Appling, Atkinson, Bacon, Brantley, Coffee, Glynn and 3 more	118 min
Jun 30, 7:02 PM EDT	Heat Advisory	JAX	Camden, Clinch, Echols	118 min

Nearby

Excessive Heat Warnings in Georgia, 2012 Every excessive heat 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.