Alert archive / Georgia / Mesoscale Discussions in 2023

Mesoscale Discussion 447

April 3, 2023Houston County, Alabama; 6 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2023, 11:59 AM CDT for Houston County, Alabama; 6 counties in Georgia. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Apr 3, 2023, 11:59 AM CDT (16:59 UTC)
Expired: Apr 3, 2023, 1:00 PM CDT
In force: 61 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 113

Counties Houston County, AL, Decatur County, GA, Early County, GA, Grady County, GA, Miller County, GA, Seminole County, GA, Thomas County, GA

The radar

The Tallahassee radar (KTLH), 68 km from the middle of the area, began a volume at 17:00 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, 5.0 hours before the alert went out and 69 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: 1 J/kg
Mixed-layer CIN: -384 J/kg
Mixed-layer LCL: 1151 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 182 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 2, 10:19 PM CDT	Mesoscale Discussion	SPC	Baldwin, Choctaw, Clarke, Mobile, Washington	5 hr
Apr 3, 1:03 AM CDT	Mesoscale Discussion	SPC	Baldwin, Mobile	117 min
Apr 3, 4:57 AM CDT	Tornado Watch	SPC	Baldwin, Choctaw, Clarke, Conecuh, Covington, Escambia and 3 more	6 hr
Apr 3, 7:22 AM CDT	Mesoscale Discussion	SPC	Butler, Choctaw, Clarke, Conecuh, Covington, Escambia and 3 more	83 min
Apr 3, 9:28 AM CDT	Mesoscale Discussion	SPC	Coffee, Dale, Geneva, Henry, Houston	2 hr
Apr 3, 9:51 AM CDT	Tornado Watch	SPC	Coffee, Dale, Geneva, Henry, Houston	6 hr
Apr 3, 5:21 PM CDT	Mesoscale Discussion	SPC	Autauga, Bibb, Butler, Chilton, Coffee, Crenshaw and 11 more	114 min
Apr 3, 1:20 PM CDT	Mesoscale Discussion	SPC	Brooks, Charlton, Clinch, Colquitt, Cook, Decatur and 7 more	85 min

Nearby

Mesoscale Discussions in Georgia, 2023 Mesoscale Discussions in Alabama, 2023 Every mesoscale discussion in 2023

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.