Alert archive / Alabama / Special Weather Statements in 2021

Special Weather Statement, NWS Birmingham, AL

August 29, 2021Montgomery County, Alabama

NWS Birmingham, AL issued this special weather statement at Aug 29, 2021, 1:28 PM CDT for Montgomery County, Alabama. It was in force for 32 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: Aug 29, 2021, 1:28 PM CDT (18:28 UTC)
Expired: Aug 29, 2021, 2:00 PM CDT
In force: 32 min
Issued by: NWS Birmingham, AL
Hail: 0.00 in
Wind: 40

County Montgomery County, AL

The radar

The Maxwell AFB radar (KMXX), 71 km from the middle of the area, began a volume at 18:30 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 12:00Z, 6.5 hours before the alert went out and 219 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: 1524 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 464 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 56 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Aug 29, 1:17 PM CDT, 11 minutes earlier.

Area forecast discussion, Aug 29, 1:17 PM CDT, 11 minutes before

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Hazardous weather outlook, Aug 29, 6:26 AM CDT, 7 hours 2 minutes before

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In the hours before

Special weather statement, Aug 29, 1:28 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
Aug 29, 3:20 AM CDT	Flash Flood Watch	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	56 hr
Aug 29, 10:09 AM CDT	River Flood Warning	BMX	Greene, Pickens, Sumter	4 days
Aug 29, 10:11 AM CDT	River Flood Warning	BMX	Sumter	3 days
Aug 29, 1:59 PM CDT	Special Weather Statement	BMX	Autauga	31 min
Aug 29, 4:21 PM CDT	Wind Advisory	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	44 hr

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.