Alert archive / Alabama / Special Weather Statements in 2021

Special Weather Statement, NWS Birmingham, AL

June 6, 2021Calhoun County, St. Clair County, Alabama

NWS Birmingham, AL issued this special weather statement at Jun 6, 2021, 7:37 PM CDT for Calhoun County, St. Clair 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 outline as issued.

The facts

Issued: Jun 6, 2021, 7:37 PM CDT (00:37 UTC)
Expired: Jun 6, 2021, 8:15 PM CDT
In force: 38 min
Issued by: NWS Birmingham, AL

Counties Calhoun County, AL, St. Clair County, AL

The radar

The Birmingham radar (KBMX), 104 km from the middle of the area, began a volume at 00:40 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 0.6 hours before the alert went out and 155 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: 260 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1484 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jun 6, 3:50 PM CDT, 3 hours 47 minutes earlier.

Area forecast discussion, Jun 6, 3:50 PM CDT, 3 hours 47 minutes before

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Hazardous weather outlook, Jun 6, 7:28 PM CDT, 9 minutes before

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In the hours before

Local storm report, Jun 6, 1:49 PM CDT, 5 hours 48 minutes before

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Special weather statement, Jun 6, 1:57 PM CDT, 5 hours 40 minutes before

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Special weather statement, Jun 6, 2:05 PM CDT, 5 hours 32 minutes before

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Special weather statement, Jun 6, 3:59 PM CDT, 3 hours 38 minutes before

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Special weather statement, Jun 6, 4:42 PM CDT, 2 hours 55 minutes before

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Special weather statement, Jun 6, 7:37 PM CDT, 0 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 7, 2:01 PM CDT	Special Weather Statement	BMX	Barbour	29 min
Jun 7, 5:39 PM CDT	Special Weather Statement	BMX	Perry	36 min
Jun 7, 6:19 PM CDT	Special Weather Statement	BMX	Perry	26 min
Jun 7, 6:42 PM CDT	Special Weather Statement	BMX	Hale	18 min
Jun 7, 6:59 PM CDT	Special Weather Statement	BMX	Bibb	46 min

Nearby

Special Weather Statements in Alabama, 2021 Every special weather statement in 2021

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.