Alert archive / Georgia / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 215, NWS Tallahassee, FL

August 18, 2020Berrien County, Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at Aug 18, 2020, 6:25 PM EDT for Berrien County, Georgia. It was in force for 17 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: Aug 18, 2020, 6:25 PM EDT (22:25 UTC)
Expired: Aug 18, 2020, 6:42 PM EDT
In force: 17 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Berrien County, GA

The radar

The Moody AFB radar (KVAX), 48 km from the middle of the area, began a volume at 22:26 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 10.4 hours before the alert went out and 141 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: 728 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 1417 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: -5 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 Tallahassee, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 18, 6:13 PM EDT, 12 minutes earlier.

Area forecast discussion, Aug 18, 6:13 PM EDT, 12 minutes before

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In the hours before

Special weather statement, Aug 18, 5:17 PM EDT, 1 hour 8 minutes before

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Special weather statement, Aug 18, 5:19 PM EDT, 1 hour 6 minutes before

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Special weather statement, Aug 18, 5:21 PM EDT, 1 hour 4 minutes before

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Special weather statement, Aug 18, 5:45 PM EDT, 40 minutes before

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Special weather statement, Aug 18, 5:46 PM EDT, 39 minutes before

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Special weather statement, Aug 18, 6:17 PM EDT, 8 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
Aug 18, 7:53 AM EDT	Special Marine Warning	TAE		67 min
Aug 18, 8:57 AM EDT	Special Marine Warning	TAE		93 min
Aug 18, 11:33 AM EDT	Special Marine Warning	TAE		31 min
Aug 18, 12:35 PM EDT	Rip Current Statement	TAE	Gulf	13 hr
Aug 18, 1:29 PM EDT	Special Weather Statement	TAE	Madison	46 min
Aug 18, 1:46 PM EDT	Special Weather Statement	TAE	Jefferson	29 min
Aug 18, 1:49 PM EDT	Special Weather Statement	TAE	Gulf	41 min
Aug 18, 2:08 PM EDT	Special Weather Statement	TAE	Jefferson	37 min
Aug 18, 2:15 PM EDT	Special Weather Statement	TAE	Leon	45 min
Aug 18, 2:19 PM EDT	Special Weather Statement	TAE	Walton	41 min
Aug 18, 2:29 PM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Leon	46 min
Aug 18, 3:13 PM EDT	Special Weather Statement	TAE	Leon	32 min
Aug 18, 3:25 PM EDT	Special Weather Statement	TAE	Bay	50 min
Aug 18, 3:40 PM EDT	Special Weather Statement	TAE	Gadsden	50 min
Aug 18, 3:56 PM EDT	Severe Thunderstorm Warning	TAE	Bay, Calhoun, Gulf, Washington	32 min
Aug 18, 4:15 PM EDT	Special Weather Statement	TAE	Wakulla	30 min
Aug 18, 5:19 PM EDT	Special Weather Statement	TAE	Holmes	26 min
Aug 18, 6:17 PM EDT	Special Weather Statement	TAE	Madison	28 min
Aug 18, 1:55 PM EDT	Special Weather Statement	TAE	Grady	35 min
Aug 18, 3:01 PM EDT	Special Weather Statement	TAE	Turner	44 min
Aug 18, 4:17 PM EDT	Special Weather Statement	TAE	Decatur	28 min
Aug 18, 5:17 PM EDT	Special Weather Statement	TAE	Seminole	28 min
Aug 18, 5:21 PM EDT	Special Weather Statement	TAE	Tift	24 min
Aug 18, 5:45 PM EDT	Special Weather Statement	TAE	Berrien, Colquitt, Cook	45 min
Aug 18, 5:46 PM EDT	Special Weather Statement	TAE	Decatur	44 min
Aug 18, 6:30 PM EDT	Special Weather Statement	TAE	Cook	30 min
Aug 18, 7:38 PM EDT	Special Weather Statement	TAE	Lanier	37 min
Aug 18, 4:18 PM EDT	Special Weather Statement	TAE	Houston	27 min
Aug 18, 4:42 PM EDT	Special Weather Statement	TAE	Houston	33 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.