Alert archive / Georgia / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 56, NWS Jacksonville, FL

May 12, 20197 counties in Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at May 12, 2019, 2:40 PM EDT for 7 counties in Georgia. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 12, 2019, 2:40 PM EDT (18:40 UTC)
Expired: May 12, 2019, 3:30 PM EDT
In force: 50 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Atkinson County, GA, Bacon County, GA, Clinch County, GA, Coffee County, GA, Echols County, GA, Jeff Davis County, GA, Ware County, GA

The radar

The Moody AFB radar (KVAX), 51 km from the middle of the area, began a volume at 18:43 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 12, 12:41 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 6.7 hours before the alert went out and 181 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: 659 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 847 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.6

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at May 11, 6:31 PM EDT, 20 hours 9 minutes earlier.

Area forecast discussion, May 11, 6:31 PM EDT, 20 hours 9 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
May 12, 2:44 PM EDT	Special Weather Statement	JAX	Duval	31 min
May 12, 2:47 PM EDT	Special Weather Statement	JAX	Hamilton	28 min
May 12, 3:06 PM EDT	Special Marine Warning	JAX		38 min
May 12, 3:10 PM EDT	Special Marine Warning	JAX		65 min
May 12, 3:20 PM EDT	Special Weather Statement	JAX	Nassau	25 min
May 12, 3:23 PM EDT	Special Weather Statement	JAX	Hamilton	52 min
May 12, 3:34 PM EDT	Special Marine Warning	JAX		26 min
May 12, 3:41 PM EDT	Special Weather Statement	JAX	Flagler	34 min
May 12, 3:43 PM EDT	Special Marine Warning	JAX		62 min
May 12, 3:48 PM EDT	Special Marine Warning	JAX		57 min
May 12, 3:56 PM EDT	Special Weather Statement	JAX	Nassau	34 min
May 12, 4:07 PM EDT	Special Marine Warning	JAX		53 min
May 12, 4:12 PM EDT	Special Weather Statement	JAX	Suwannee	48 min
May 12, 4:18 PM EDT	Special Marine Warning	JAX		42 min
May 12, 4:39 PM EDT	Special Weather Statement	JAX	Columbia	51 min
May 12, 4:47 PM EDT	Special Marine Warning	JAX		88 min
May 12, 4:50 PM EDT	Special Marine Warning	JAX		85 min
May 12, 5:43 PM EDT	Special Marine Warning	JAX		62 min
May 12, 6:36 PM EDT	Special Marine Warning	JAX		42 min
May 12, 1:32 PM EDT	Special Weather Statement	JAX	Coffee	28 min
May 12, 1:35 PM EDT	Special Weather Statement	JAX	Appling	40 min
May 12, 2:09 PM EDT	Special Weather Statement	JAX	Bacon	36 min
May 12, 2:30 PM EDT	Special Weather Statement	JAX	Wayne	45 min
May 12, 2:35 PM EDT	Special Weather Statement	JAX	Clinch, Ware	40 min
May 12, 2:47 PM EDT	Severe Thunderstorm Warning	JAX	Appling, Pierce, Wayne	43 min
May 12, 2:57 PM EDT	Special Weather Statement	JAX	Brantley	48 min
May 12, 3:13 PM EDT	Special Weather Statement	JAX	Camden	17 min
May 12, 3:21 PM EDT	Severe Thunderstorm Warning	JAX	Brantley, Camden, Charlton, Pierce, Ware	39 min
May 12, 3:27 PM EDT	Severe Thunderstorm Warning	JAX	Wayne	48 min
May 12, 3:32 PM EDT	Areal Flood Advisory	JAX	Wayne	118 min
May 12, 3:39 PM EDT	Severe Thunderstorm Warning	JAX	Brantley, Glynn, Wayne	36 min
May 12, 3:44 PM EDT	Special Weather Statement	JAX	Wayne	46 min
May 12, 4:04 PM EDT	Special Weather Statement	JAX	Glynn	41 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2019 Every severe thunderstorm warning in 2019

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.