Alert archive / Georgia / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 27, NWS Jacksonville, FL

March 4, 2020Coffee County, Jeff Davis County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Mar 4, 2020, 3:44 PM EST for Coffee County, Jeff Davis County, Georgia. It was in force for 18 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: Mar 4, 2020, 3:44 PM EST (20:44 UTC)
Expired: Mar 4, 2020, 4:02 PM EST
In force: 18 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Coffee County, GA, Jeff Davis County, GA

The radar

The Moody AFB radar (KVAX), 91 km from the middle of the area, began a volume at 20:45 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
Mar 4, 10:16 AM EST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 8.7 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: 464 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 722 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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 Mar 4, 2:34 PM EST, 1 hour 10 minutes earlier.

Area forecast discussion, Mar 4, 2:34 PM EST, 1 hour 10 minutes before

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In the hours before

Special weather statement, Mar 4, 11:50 AM EST, 3 hours 54 minutes before

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Local storm report, Mar 4, 12:48 PM EST, 2 hours 56 minutes before

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Local storm report, Mar 4, 12:51 PM EST, 2 hours 53 minutes before

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Special weather statement, Mar 4, 2:23 PM EST, 1 hour 21 minutes before

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Local storm report, Mar 4, 2:27 PM EST, 1 hour 17 minutes before

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Special weather statement, Mar 4, 3:26 PM EST, 18 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
Mar 4, 2:35 PM EST	Special Marine Warning	JAX		40 min
Mar 4, 2:57 PM EST	Special Marine Warning	JAX		58 min
Mar 4, 1:37 AM EST	Special Weather Statement	JAX	Echols	23 min
Mar 4, 4:22 AM EST	Special Weather Statement	JAX	Clinch, Echols	38 min
Mar 4, 5:00 AM EST	Special Weather Statement	JAX	Clinch	30 min
Mar 4, 5:51 AM EST	Special Weather Statement	JAX	Camden	39 min
Mar 4, 6:30 AM EST	Special Weather Statement	JAX	Brantley, Ware	30 min
Mar 4, 9:29 AM EST	Special Weather Statement	JAX	Jeff Davis	46 min
Mar 4, 9:55 AM EST	Special Weather Statement	JAX	Coffee	35 min
Mar 4, 10:13 AM EST	Special Weather Statement	JAX	Appling	32 min
Mar 4, 10:35 AM EST	Special Weather Statement	JAX	Bacon	25 min
Mar 4, 11:01 AM EST	Special Weather Statement	JAX	Wayne	29 min
Mar 4, 11:06 AM EST	Tornado Warning	JAX	Appling, Pierce, Wayne	24 min
Mar 4, 11:30 AM EST	Severe Thunderstorm Warning	JAX	Glynn, Wayne	30 min
Mar 4, 11:33 AM EST	Tornado Warning	JAX	Wayne	27 min
Mar 4, 11:48 AM EST	Special Weather Statement	JAX	Coffee	27 min
Mar 4, 11:50 AM EST	Special Weather Statement	JAX	McIntosh	25 min
Mar 4, 2:23 PM EST	Special Weather Statement	JAX	Glynn	22 min
Mar 4, 3:26 PM EST	Special Weather Statement	JAX	Jeff Davis	49 min
Mar 4, 4:00 PM EST	Special Weather Statement	JAX	Appling	30 min
Mar 4, 4:31 PM EST	Special Weather Statement	JAX	Appling	14 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2020 Every severe thunderstorm warning in 2020

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.