Alert archive / Alabama / Special Weather Statements in 2017

Special Weather Statement, NWS Birmingham, AL

May 12, 2017Cleburne County, Alabama

NWS Birmingham, AL issued this special weather statement at May 12, 2017, 3:02 PM CDT for Cleburne County, Alabama. It was in force for 28 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: May 12, 2017, 3:02 PM CDT (20:02 UTC)
Expired: May 12, 2017, 3:30 PM CDT
In force: 28 min
Issued by: NWS Birmingham, AL

County Cleburne County, AL

The radar

The Atlanta radar (KFFC), 91 km from the middle of the area, began a volume at 20:02 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, 8.0 hours before the alert went out and 96 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1299 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 99 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 May 12, 1:44 PM CDT, 1 hour 18 minutes earlier.

Area forecast discussion, May 12, 1:44 PM CDT, 1 hour 18 minutes before

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Hazardous weather outlook, May 12, 4:35 AM CDT, 10 hours 27 minutes before

Hazardous Weather Outlook
National Weather Service Birmingham AL
435 AM CDT Fri May 12 2017

ALZ011>015-017>050-131245-
Marion-Lamar-Fayette-Winston-Walker-Blount-Etowah-Calhoun-Cherokee-
Cleburne-Pickens-Tuscaloosa-Jefferson-Shelby-St. Clair-Talladega-
Clay-Randolph-Sumter-Greene-Hale-Perry-Bibb-Chilton-Coosa-Tallapoosa-
Chambers-Marengo-Dallas-Autauga-Lowndes-Elmore-Montgomery-Macon-
Bullock-Lee-Russell-Pike-Barbour-
435 AM CDT Fri May 12 2017

This Hazardous Weather Outlook is for the counties served by the
National Weather Service office in Birmingham.

.DAY ONE...Today and Tonight.

There is a marginal risk for severe thunderstorms noon to 8 PM today
across all of Central Alabama. The main threats will be isolated
damaging winds and hail up the size of quarters.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Activation of storm spotters and emergency management may be needed
Friday afternoon and evening.

In the hours before

Special weather statement, May 12, 12:54 PM CDT, 2 hours 8 minutes before

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Local storm report, May 12, 12:57 PM CDT, 2 hours 5 minutes before

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Special weather statement, May 12, 1:01 PM CDT, 2 hours 1 minute before

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Special weather statement, May 12, 1:28 PM CDT, 1 hour 34 minutes before

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Special weather statement, May 12, 2:00 PM CDT, 1 hour 2 minutes before

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Special weather statement, May 12, 3:02 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
May 12, 11:32 AM CDT	Special Weather Statement	BMX	Jefferson	28 min
May 12, 11:43 AM CDT	Severe Thunderstorm Warning	BMX	Blount, Jefferson, St. Clair	26 min
May 12, 12:09 PM CDT	Special Weather Statement	BMX	St. Clair	51 min
May 12, 12:54 PM CDT	Special Weather Statement	BMX	Etowah	51 min
May 12, 1:01 PM CDT	Special Weather Statement	BMX	Jefferson	44 min
May 12, 1:28 PM CDT	Special Weather Statement	BMX	Calhoun	62 min
May 12, 2:00 PM CDT	Special Weather Statement	BMX	Cherokee	30 min

Nearby

Special Weather Statements in Alabama, 2017 Every special weather statement in 2017

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.