Alert archive / Florida / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 213, NWS Jacksonville, FL

August 24, 2020Hamilton County, Suwannee County, Florida; Echols County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Aug 24, 2020, 7:08 PM EDT for Hamilton County, Suwannee County, Florida; Echols County, Georgia. It was in force for 37 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 24, 2020, 7:08 PM EDT (23:08 UTC)
Expired: Aug 24, 2020, 7:45 PM EDT
In force: 37 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Hamilton County, FL, Suwannee County, FL, Echols County, GA

The radar

The Moody AFB radar (KVAX), 47 km from the middle of the area, began a volume at 23:12 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, 11.1 hours before the alert went out and 130 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: 552 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 938 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.1

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 Aug 24, 4:01 PM EDT, 3 hours 7 minutes earlier.

Area forecast discussion, Aug 24, 4:01 PM EDT, 3 hours 7 minutes before

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In the hours before

Special weather statement, Aug 24, 5:50 PM EDT, 1 hour 18 minutes before

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Local storm report, Aug 24, 5:50 PM EDT, 1 hour 18 minutes before

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Special weather statement, Aug 24, 5:57 PM EDT, 1 hour 11 minutes before

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Special weather statement, Aug 24, 6:00 PM EDT, 1 hour 8 minutes before

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Local storm report, Aug 24, 6:46 PM EDT, 22 minutes before

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Special weather statement, Aug 24, 6:54 PM EDT, 14 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
Aug 24, 2:43 AM EDT	Rip Current Statement	JAX	Duval, Flagler, Nassau	41 hr
Aug 24, 11:07 AM EDT	Special Weather Statement	JAX	Clay, Duval	38 min
Aug 24, 11:43 AM EDT	Special Weather Statement	JAX	Clay	47 min
Aug 24, 3:15 PM EDT	Special Weather Statement	JAX	Union	30 min
Aug 24, 3:25 PM EDT	Special Weather Statement	JAX	Putnam	35 min
Aug 24, 4:14 PM EDT	Special Weather Statement	JAX	Gilchrist	31 min
Aug 24, 4:44 PM EDT	Special Weather Statement	JAX	Gilchrist	31 min
Aug 24, 4:57 PM EDT	Special Weather Statement	JAX	Union	33 min
Aug 24, 5:26 PM EDT	Special Weather Statement	JAX	Baker	34 min
Aug 24, 5:50 PM EDT	Special Weather Statement	JAX	Baker	25 min
Aug 24, 5:57 PM EDT	Special Weather Statement	JAX	Hamilton, Suwannee	48 min
Aug 24, 6:14 PM EDT	Severe Thunderstorm Warning	JAX	Hamilton, Suwannee	46 min
Aug 24, 6:54 PM EDT	Special Weather Statement	JAX	Hamilton	51 min
Aug 24, 11:24 AM EDT	Special Weather Statement	JAX	Bacon	51 min
Aug 24, 11:46 AM EDT	Severe Thunderstorm Warning	JAX	Appling, Bacon, Coffee, Jeff Davis, Pierce, Ware	26 min
Aug 24, 2:11 PM EDT	Special Weather Statement	JAX	Brantley	34 min
Aug 24, 4:40 PM EDT	Special Weather Statement	JAX	Clinch	35 min
Aug 24, 5:05 PM EDT	Special Weather Statement	JAX	Clinch	25 min
Aug 24, 5:32 PM EDT	Special Weather Statement	JAX	Clinch	28 min
Aug 24, 6:00 PM EDT	Special Weather Statement	JAX	Atkinson	45 min
Aug 24, 7:11 PM EDT	Special Weather Statement	JAX	Echols	34 min
Aug 24, 7:26 PM EDT	Severe Thunderstorm Warning	JAX	Echols	34 min
Aug 24, 7:32 PM EDT	Severe Thunderstorm Warning	JAX	Bacon, Coffee, Ware	28 min
Aug 24, 7:46 PM EDT	Special Weather Statement	JAX	Clinch	29 min
Aug 24, 7:57 PM EDT	Special Weather Statement	JAX	Atkinson, Coffee	63 min

Nearby

Severe Thunderstorm Warnings in Florida, 2020 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.