Alert archive / Alabama / Special Weather Statements in 2015

Special Weather Statement, NWS Birmingham, AL

April 19, 2015Calhoun County, Alabama

NWS Birmingham, AL issued this special weather statement at Apr 19, 2015, 4:51 PM CDT for Calhoun County, Alabama. It was in force for 39 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: Apr 19, 2015, 4:51 PM CDT (21:51 UTC)
Expired: Apr 19, 2015, 5:30 PM CDT
In force: 39 min
Issued by: NWS Birmingham, AL

County Calhoun County, AL

The radar

The Birmingham radar (KBMX), 81 km from the middle of the area, began a volume at 21:54 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 12:00Z, 9.9 hours before the alert went out and 82 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: 170 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 713 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 203 m²/s²
0-3 km storm-relative helicity: 291 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.8

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 Apr 19, 2:50 PM CDT, 2 hours 1 minute earlier.

Area forecast discussion, Apr 19, 2:50 PM CDT, 2 hours 1 minute before

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Hazardous weather outlook, Apr 19, 3:17 PM CDT, 1 hour 34 minutes before

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In the hours before

Local storm report, Apr 19, 12:26 PM CDT, 4 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1226 PM CDT SUN APR 19 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0835 AM     TSTM WND DMG     4 NE SULPHUR SPRINGS    33.88N 85.82W
04/19/2015                   CALHOUN            AL   EMERGENCY MNGR

            MULTIPLE TREES DOWN ALONG PLEASANT VALLEY RD. ALSO DAMAGE
            TO AGRICULTURAL BUILDINGS AT PLEASANT VALLEY HIGH SCHOOL.
            UPDATED REPORT.

&&

DAVIS

Special weather statement, Apr 19, 2:21 PM CDT, 2 hours 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
221 PM CDT SUN APR 19 2015

ALZ023-192000-
TUSCALOOSA AL-
221 PM CDT SUN APR 19 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN TUSCALOOSA COUNTY
UNTIL 300 PM CDT...

AT 220 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
SAMANTHA...OR 16 MILES NORTH OF NORTHPORT...MOVING EAST AT 30 MPH.

NICKEL SIZE HAIL WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
SAMANTHA...BANKHEAD LOCK AND DAM...WILEY...WHITSON...NEW LEXINGTON
AND WINDHAM SPRINGS.

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 3352 8771 3352 8767 3358 8767 3358 8763
      3361 8763 3360 8737 3359 8737 3359 8732
      3352 8732 3351 8726 3350 8729 3348 8729
      3349 8733 3347 8734 3344 8731 3343 8728
      3342 8740 3341 8771
TIME...MOT...LOC 1920Z 259DEG 27KT 3348 8762

19

Special weather statement, Apr 19, 2:53 PM CDT, 1 hour 58 minutes before

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Special weather statement, Apr 19, 4:12 PM CDT, 39 minutes before

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Special weather statement, Apr 19, 4:51 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
Apr 18, 9:56 PM CDT	River Flood Warning	BMX	Greene, Hale, Marengo, Pickens, Sumter	3 days
Apr 19, 7:15 AM CDT	Tornado Warning	BMX	Bullock, Macon	30 min
Apr 19, 8:44 AM CDT	Tornado Warning	BMX	Russell	45 min
Apr 19, 8:52 AM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Cleburne	23 min
Apr 19, 9:14 AM CDT	Severe Thunderstorm Warning	BMX	Cherokee, Cleburne	31 min
Apr 19, 2:21 PM CDT	Special Weather Statement	BMX	Tuscaloosa	39 min
Apr 19, 2:53 PM CDT	Special Weather Statement	BMX	Jefferson	67 min
Apr 19, 4:12 PM CDT	Special Weather Statement	BMX	St. Clair	48 min
Apr 19, 4:25 PM CDT	Severe Thunderstorm Warning	BMX	St. Clair	35 min
Apr 19, 5:16 PM CDT	Special Weather Statement	BMX	Calhoun	29 min
Apr 19, 5:54 PM CDT	Special Weather Statement	BMX	Cleburne	36 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.