Alert archive / Georgia / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 130, NWS Tallahassee, FL

May 21, 20204 counties in Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at May 21, 2020, 6:19 PM EDT for 4 counties in Georgia. It was in force for 41 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 21, 2020, 6:19 PM EDT (22:19 UTC)
Expired: May 21, 2020, 7:00 PM EDT
In force: 41 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Brooks County, GA, Colquitt County, GA, Cook County, GA, Thomas County, GA

The radar

The Moody AFB radar (KVAX), 66 km from the middle of the area, began a volume at 22:19 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, 10.3 hours before the alert went out and 197 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: 1487 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 706 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.5
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 Tallahassee, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at May 21, 4:00 PM EDT, 2 hours 19 minutes earlier.

Area forecast discussion, May 21, 4:00 PM EDT, 2 hours 19 minutes before

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In the hours before

Special weather statement, May 21, 3:47 PM EDT, 2 hours 32 minutes before

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Special weather statement, May 21, 4:28 PM EDT, 1 hour 51 minutes before

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Local storm report, May 21, 5:49 PM EDT, 30 minutes before

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Special weather statement, May 21, 6:08 PM EDT, 11 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 8:31 PM EDT	Areal Flood Advisory	TAE	Franklin, Liberty, Wakulla	3 hr
May 20, 8:58 PM EDT	Special Weather Statement	TAE	Liberty	32 min
May 20, 9:25 PM EDT	Special Marine Warning	TAE		65 min
May 20, 9:28 PM EDT	Special Weather Statement	TAE	Wakulla	47 min
May 20, 10:21 PM EDT	Special Marine Warning	TAE		54 min
May 21, 4:28 PM EDT	Special Weather Statement	TAE	Decatur	47 min
May 21, 6:08 PM EDT	Special Weather Statement	TAE	Brooks	52 min
May 21, 6:44 PM EDT	Special Weather Statement	TAE	Lanier, Lowndes	46 min
May 21, 3:47 PM EDT	Special Weather Statement	TAE	Houston	43 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.