Alert archive / Georgia / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 134, NWS Jacksonville, FL

July 16, 2018Glynn County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Jul 16, 2018, 6:56 PM EDT for Glynn County, Georgia. It was in force for 34 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: Jul 16, 2018, 6:56 PM EDT (22:56 UTC)
Expired: Jul 16, 2018, 7:30 PM EDT
In force: 34 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

County Glynn County, GA

The radar

The Jacksonville radar (KJAX), 83 km from the middle of the area, began a volume at 22:56 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 12:00Z, 10.9 hours before the alert went out and 82 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: 1651 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 766 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 47 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 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 Jul 16, 4:30 PM EDT, 2 hours 26 minutes earlier.

Area forecast discussion, Jul 16, 4:30 PM EDT, 2 hours 26 minutes before

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In the hours before

Special weather statement, Jul 16, 3:59 PM EDT, 2 hours 57 minutes before

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Special weather statement, Jul 16, 4:34 PM EDT, 2 hours 22 minutes before

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Special weather statement, Jul 16, 5:04 PM EDT, 1 hour 52 minutes before

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Special weather statement, Jul 16, 5:36 PM EDT, 1 hour 20 minutes before

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Special weather statement, Jul 16, 5:38 PM EDT, 1 hour 18 minutes before

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Special weather statement, Jul 16, 6:46 PM EDT, 10 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 16, 2:03 PM EDT	Special Weather Statement	JAX	Clay	42 min
Jul 16, 2:45 PM EDT	Special Weather Statement	JAX	Union	45 min
Jul 16, 3:23 PM EDT	Special Weather Statement	JAX	Baker	52 min
Jul 16, 3:45 PM EDT	Special Marine Warning	JAX		44 min
Jul 16, 3:53 PM EDT	Severe Thunderstorm Warning	JAX	Saint Johns	21 min
Jul 16, 3:59 PM EDT	Special Weather Statement	JAX	Marion	46 min
Jul 16, 4:43 PM EDT	Special Marine Warning	JAX		62 min
Jul 16, 5:04 PM EDT	Special Weather Statement	JAX	Flagler	41 min
Jul 16, 5:17 PM EDT	Special Marine Warning	JAX		58 min
Jul 16, 5:22 PM EDT	Severe Thunderstorm Warning	JAX	Flagler	38 min
Jul 16, 5:39 PM EDT	Special Marine Warning	JAX		66 min
Jul 16, 5:44 PM EDT	Areal Flood Advisory	JAX	Flagler	91 min
Jul 16, 6:34 PM EDT	Special Marine Warning	JAX		56 min
Jul 16, 7:21 PM EDT	Special Weather Statement	JAX	Putnam	24 min
Jul 16, 3:56 PM EDT	Special Weather Statement	JAX	Clinch	34 min
Jul 16, 4:34 PM EDT	Special Weather Statement	JAX	Ware	41 min
Jul 16, 5:36 PM EDT	Special Weather Statement	JAX	Pierce	39 min
Jul 16, 5:38 PM EDT	Special Weather Statement	JAX	Camden	52 min
Jul 16, 5:57 PM EDT	Severe Thunderstorm Warning	JAX	Camden, Glynn	48 min
Jul 16, 6:11 PM EDT	Severe Thunderstorm Warning	JAX	Camden, Glynn	33 min
Jul 16, 6:46 PM EDT	Special Weather Statement	JAX	Glynn	29 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2018 Every severe thunderstorm warning in 2018

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.