Alert archive / Georgia / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 12, NWS Tallahassee, FL

January 11, 2020Jackson County, Florida; 4 counties in Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at Jan 11, 2020, 6:43 PM CST for Jackson County, Florida; 4 counties in Georgia. It was in force for 47 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: Jan 11, 2020, 6:43 PM CST (00:43 UTC)
Expired: Jan 11, 2020, 7:30 PM CST
In force: 47 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Jackson County, FL, Decatur County, GA, Early County, GA, Miller County, GA, Seminole County, GA

The radar

The Ft Rucker radar (KEOX), 75 km from the middle of the area, began a volume at 00:45 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
Jan 11, 2:44 PM CST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 0.7 hours before the alert went out and 87 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: 270 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 646 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 326 m²/s²
0-3 km storm-relative helicity: 364 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.0

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 Jan 11, 5:57 PM CST, 46 minutes earlier.

Area forecast discussion, Jan 11, 5:57 PM CST, 46 minutes before

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In the hours before

Local storm report, Jan 11, 5:16 PM CST, 1 hour 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
616 PM EST SAT JAN 11 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0515 PM     TSTM WND DMG     2 SW CENTER RIDGE       30.78N 86.11W
01/11/2020                   WALTON             FL   COUNTY OFFICIAL

            TREE DOWN AT 83 INSTITUTION RD.

&&

IG

Local storm report, Jan 11, 5:20 PM CST, 1 hour 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
620 PM EST SAT JAN 11 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0530 PM     TSTM WND DMG     NEW HOPE                30.95N 85.88W
01/11/2020                   HOLMES             FL   COUNTY OFFICIAL

            THREE TREES AND ONE POWERLINE DOWN.

&&

IG

Local storm report, Jan 11, 5:21 PM CST, 1 hour 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
621 PM EST SAT JAN 11 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0600 PM     TSTM WND DMG     BONIFAY                 30.79N 85.68W
01/11/2020                   HOLMES             FL   COUNTY OFFICIAL

            ONE TREE DOWN.

&&

IG

Local storm report, Jan 11, 5:26 PM CST, 1 hour 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
626 PM EST SAT JAN 11 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0609 PM     TSTM WND DMG     2 W DOTHAN              31.23N 85.43W
01/11/2020                   HOUSTON            AL   PUBLIC

            STOPLIGHTS BLOWN OFF FROM WIRES ON US-84 AND
            WESTGATE PKWY.

&&

IG

Special weather statement, Jan 11, 5:41 PM CST, 1 hour 2 minutes before

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Local storm report, Jan 11, 5:51 PM CST, 52 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
Jan 11, 6:37 PM CST	Special Weather Statement	TAE	Calhoun	53 min
Jan 11, 7:05 PM CST	Special Weather Statement	TAE	Gadsden, Liberty	55 min
Jan 12, 1:01 PM CST	Marine Dense Fog Advisory	TAE		20 hr
Jan 11, 6:33 PM CST	Severe Thunderstorm Warning	TAE	Lee, Worth	57 min
Jan 11, 6:57 PM CST	Special Weather Statement	TAE	Dougherty	48 min
Jan 11, 7:11 PM CST	Special Weather Statement	TAE	Baker	49 min
Jan 11, 7:51 PM CST	Special Weather Statement	TAE	Decatur, Grady, Mitchell	39 min
Jan 11, 8:19 PM CST	Special Weather Statement	TAE	Colquitt, Grady, Thomas, Tift	41 min
Jan 11, 8:33 PM CST	Special Weather Statement	TAE	Ben Hill, Irwin, Tift, Turner	42 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2020 Severe Thunderstorm Warnings in Florida, 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.