Alert archive / Alabama / Special Weather Statements in 2016

Special Weather Statement, NWS Birmingham, AL

August 20, 2016Lee County, Alabama

NWS Birmingham, AL issued this special weather statement at Aug 20, 2016, 3:41 PM CDT for Lee County, Alabama. It was in force for 34 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 20, 2016, 3:41 PM CDT (20:41 UTC)
Expired: Aug 20, 2016, 4:15 PM CDT
In force: 34 min
Issued by: NWS Birmingham, AL

County Lee County, AL

The radar

The Maxwell AFB radar (KMXX), 33 km from the middle of the area, began a volume at 20:43 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, 8.7 hours before the alert went out and 120 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: 187 J/kg
Mixed-layer CIN: -76 J/kg
Mixed-layer LCL: 900 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 74 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 20, 12:40 PM CDT, 3 hours 1 minute earlier.

Area forecast discussion, Aug 20, 12:40 PM CDT, 3 hours 1 minute before

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Hazardous weather outlook, Aug 20, 5:04 AM CDT, 10 hours 37 minutes before

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In the hours before

Special weather statement, Aug 20, 3:41 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 19, 7:02 PM CDT	Special Weather Statement	BMX	Perry	43 min
Aug 19, 7:24 PM CDT	Special Weather Statement	BMX	Chilton	51 min
Aug 19, 8:55 PM CDT	Areal Flood Advisory	BMX	Winston	2 hr
Aug 20, 3:58 PM CDT	Special Weather Statement	BMX	Lee	32 min
Aug 20, 4:57 PM CDT	Special Weather Statement	BMX	Perry	33 min
Aug 20, 5:35 PM CDT	Special Weather Statement	BMX	Chilton	40 min
Aug 20, 6:11 PM CDT	Special Weather Statement	BMX	Jefferson	34 min
Aug 20, 6:36 PM CDT	Special Weather Statement	BMX	Jefferson	39 min
Aug 20, 6:52 PM CDT	Special Weather Statement	BMX	Shelby	38 min
Aug 20, 6:55 PM CDT	Special Weather Statement	BMX	Bibb	35 min

Nearby

Special Weather Statements in Alabama, 2016 Every special weather statement in 2016

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.