Alert archive / Alabama / Special Weather Statements in 2015

Special Weather Statement, NWS Birmingham, AL

May 31, 2015Shelby County, Alabama

NWS Birmingham, AL issued this special weather statement at May 31, 2015, 9:01 PM CDT for Shelby County, Alabama. It was in force for 29 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 31, 2015, 9:01 PM CDT (02:01 UTC)
Expired: May 31, 2015, 9:30 PM CDT
In force: 29 min
Issued by: NWS Birmingham, AL

County Shelby County, AL

The radar

The Birmingham radar (KBMX), 5 km from the middle of the area, began a volume at 02:04 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

Birmingham, AL (KBMX), launched 00:00Z, 2.0 hours before the alert went out and 4 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: 585 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1474 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 29 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, 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 May 31, 6:52 PM CDT, 2 hours 9 minutes earlier.

Area forecast discussion, May 31, 6:52 PM CDT, 2 hours 9 minutes before

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Hazardous weather outlook, May 31, 3:32 AM CDT, 17 hours 29 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
332 AM CDT SUN MAY 31 2015

ALZ011>015-017>050-011145-
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-
332 AM CDT SUN MAY 31 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...OUTLOOK THROUGH TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT IS NOT
EXPECTED AT THIS TIME.

In the hours before

Special weather statement, May 31, 7:23 PM CDT, 1 hour 38 minutes before

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Special weather statement, May 31, 7:43 PM CDT, 1 hour 18 minutes before

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Local storm report, May 31, 7:57 PM CDT, 1 hour 4 minutes before

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Local storm report, May 31, 8:00 PM CDT, 1 hour 1 minute before

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Special weather statement, May 31, 8:07 PM CDT, 54 minutes before

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Special weather statement, May 31, 9:01 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 31, 7:19 PM CDT	Special Weather Statement	BMX	Hale, Perry	26 min
May 31, 7:23 PM CDT	Special Weather Statement	BMX	Cherokee	37 min
May 31, 7:43 PM CDT	Special Weather Statement	BMX	Coosa	32 min
May 31, 8:07 PM CDT	Special Weather Statement	BMX	Bibb, Chilton	38 min
May 31, 9:18 PM CDT	Areal Flood Advisory	BMX	Autauga, Chilton, Coosa, Elmore, Lowndes, Montgomery	57 min
May 31, 9:22 PM CDT	Areal Flood Advisory	BMX	Calhoun, Clay, St. Clair, Shelby, Talladega	53 min
May 31, 9:26 PM CDT	Special Weather Statement	BMX	Calhoun, Talladega	49 min
May 31, 10:03 PM CDT	Special Weather Statement	BMX	Jefferson	27 min
May 31, 10:35 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Etowah, St. Clair	25 min

Nearby

Special Weather Statements in Alabama, 2015 Every special weather statement in 2015

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.