Alert archive / Alabama / Special Weather Statements in 2012

Special Weather Statement, NWS Birmingham, AL

July 18, 2012Etowah County, Alabama

NWS Birmingham, AL issued this special weather statement at Jul 18, 2012, 12:37 AM CDT for Etowah 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: Jul 18, 2012, 12:37 AM CDT (05:37 UTC)
Expired: Jul 18, 2012, 1:15 AM CDT
In force: 38 min
Issued by: NWS Birmingham, AL

County Etowah County, AL

The radar

The Northeast Alabama radar (KHTX), 96 km from the middle of the area, began a volume at 05:39 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, 5.6 hours before the alert went out and 160 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: 1433 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 994 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 Jul 17, 11:40 PM CDT, 57 minutes earlier.

Area forecast discussion, Jul 17, 11:40 PM CDT, 57 minutes before

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Hazardous weather outlook, Jul 17, 10:10 PM CDT, 2 hours 27 minutes before

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In the hours before

Local storm report, Jul 17, 8:23 PM CDT, 4 hours 14 minutes before

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Local storm report, Jul 17, 8:37 PM CDT, 4 hours before

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Special weather statement, Jul 17, 10:03 PM CDT, 2 hours 34 minutes before

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Local storm report, Jul 17, 11:16 PM CDT, 1 hour 21 minutes before

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Special weather statement, Jul 17, 11:48 PM CDT, 49 minutes before

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Special weather statement, Jul 18, 12:37 AM 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
Jul 17, 7:52 PM CDT	Special Weather Statement	BMX	Montgomery	38 min
Jul 17, 11:12 PM CDT	Areal Flood Advisory	BMX	Greene	2 hr
Jul 17, 11:48 PM CDT	Special Weather Statement	BMX	Cherokee	42 min
Jul 18, 12:45 AM CDT	Special Weather Statement	BMX	Cherokee	30 min
Jul 18, 1:12 AM CDT	Special Weather Statement	BMX	Etowah	48 min
Jul 18, 6:59 AM CDT	Special Weather Statement	BMX	Randolph	46 min
Jul 18, 10:41 AM CDT	Flash Flood Warning	BMX	Shelby	3 hr
Jul 18, 10:53 AM CDT	Areal Flood Advisory	BMX	Jefferson	112 min
Jul 18, 11:14 AM CDT	Flash Flood Warning	BMX	Jefferson	88 min
Jul 18, 12:29 PM CDT	Special Weather Statement	BMX	Greene, Sumter	46 min
Jul 18, 12:57 PM CDT	Special Weather Statement	BMX	Fayette	48 min
Jul 18, 1:29 PM CDT	Areal Flood Warning	BMX	Shelby	3 hr
Jul 18, 1:43 PM CDT	Areal Flood Advisory	BMX	Walker, Winston	2 hr
Jul 18, 1:45 PM CDT	Special Weather Statement	BMX	Fayette, Greene	45 min
Jul 18, 1:49 PM CDT	Areal Flood Advisory	BMX	Greene, Hale, Pickens, Tuscaloosa	116 min
Jul 18, 2:04 PM CDT	Areal Flood Advisory	BMX	Fayette, Lamar	116 min
Jul 18, 2:14 PM CDT	Areal Flood Advisory	BMX	Etowah	2 hr

Nearby

Special Weather Statements in Alabama, 2012 Every special weather statement in 2012

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.