Alert archive / Alabama / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 217, NWS Birmingham, AL

June 18, 2023Greene County, Pickens County, Sumter County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jun 18, 2023, 7:07 AM CDT for Greene County, Pickens County, Sumter County, Alabama. It was in force for 38 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: Jun 18, 2023, 7:07 AM CDT (12:07 UTC)
Expired: Jun 18, 2023, 7:45 AM CDT
In force: 38 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Greene County, AL, Pickens County, AL, Sumter County, AL

The radar

The Columbus AFB radar (KGWX), 112 km from the middle of the area, began a volume at 12:11 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

Birmingham, AL (KBMX), launched 12:00Z, 0.1 hours before the alert went out and 125 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: 642 J/kg
Mixed-layer CIN: -163 J/kg
Mixed-layer LCL: 1263 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 192 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Birmingham, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 18, 4:12 AM CDT, 2 hours 55 minutes earlier.

Area forecast discussion, Jun 18, 4:12 AM CDT, 2 hours 55 minutes before

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Hazardous weather outlook, Jun 18, 4:21 AM CDT, 2 hours 46 minutes before

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In the hours before

Local storm report, Jun 18, 2:31 AM CDT, 4 hours 36 minutes before

Preliminary Local Storm Report
National Weather Service Birmingham AL
231 AM CDT Sun Jun 18 2023

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

0559 PM     Hail             Ethelsville             33.41N 88.21W
06/16/2023  E2.75 inch       Pickens            AL   Public

            Social media video of large hail falling in
            Ethelsville. There were numerous large
            stones which appear to be tennis to baseball
            size.

&&

AS

Special weather statement, Jun 18, 6:46 AM CDT, 21 minutes before

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The office that day

Everything else NWS Birmingham, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 18, 4:15 AM CDT	Dense Fog Advisory	BMX	Dallas, Lowndes, Marengo, Montgomery, Pike, Sumter	6 hr
Jun 18, 6:46 AM CDT	Special Weather Statement	BMX	Greene, Pickens	44 min
Jun 18, 7:21 AM CDT	Special Weather Statement	BMX	Marengo	39 min
Jun 18, 8:14 AM CDT	Special Weather Statement	BMX	Marion, Winston	46 min
Jun 18, 8:51 AM CDT	Special Weather Statement	BMX	Bibb, Chilton, Perry	54 min
Jun 18, 8:53 AM CDT	Special Weather Statement	BMX	Autauga, Dallas, Lowndes, Perry	67 min
Jun 18, 11:23 AM CDT	Severe Thunderstorm Warning	BMX	Marengo	52 min
Jun 18, 1:33 PM CDT	Flood Watch	BMX	Autauga, Bibb, Chilton, Dallas, Elmore, Greene and 8 more	17 hr

Nearby

Severe Thunderstorm Warnings in Alabama, 2023 Every severe thunderstorm warning 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.