Alert archive / Alabama / Special Weather Statements in 2017

Special Weather Statement, NWS Birmingham, AL

March 30, 20175 counties in Alabama

NWS Birmingham, AL issued this special weather statement at Mar 30, 2017, 9:13 AM CDT for 5 counties in Alabama. It was in force for 47 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: Mar 30, 2017, 9:13 AM CDT (14:13 UTC)
Expired: Mar 30, 2017, 10:00 AM CDT
In force: 47 min
Issued by: NWS Birmingham, AL

Counties Fayette County, AL, Pickens County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL

The radar

The Birmingham radar (KBMX), 82 km from the middle of the area, began a volume at 14:16 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, 2.2 hours before the alert went out and 80 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: 5 J/kg
Mixed-layer CIN: -258 J/kg
Mixed-layer LCL: 887 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -23 m²/s²
0-3 km storm-relative helicity: -14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

674 
WWUS84 KBMX 301413
SPSBMX

Special Weather Statement
National Weather Service Birmingham AL
913 AM CDT THU MAR 30 2017
 
ALZ011>015-017-022>024-031-301500-
Greene AL-Fayette AL-Walker AL-Pickens AL-Winston AL-Jefferson AL-
Tuscaloosa AL-Marion AL-Lamar AL-Blount AL-
913 AM CDT THU MAR 30 2017

...SIGNIFICANT WEATHER ADVISORY FOR WALKER...TUSCALOOSA...PICKENS...
SOUTHEASTERN MARION...CENTRAL BLOUNT...NORTHERN GREENE...WESTERN
JEFFERSON...WINSTON...FAYETTE AND SOUTHEASTERN LAMAR COUNTIES UNTIL
1000 AM CDT...

At 912 AM CDT,  an interesting pressure feature was moving into 
western Alabama. This was from previous thunderstorms which since 
have dissipated.

Winds gusts of 25 to 40 mph will be possible as this feature moves 
through. Only light showers at best are associated with this feature 
and the highest winds would be on the back side of the rain.

Locations impacted include...
Tuscaloosa, Northport, Jasper, Winfield, Fayette, Haleyville,
Sumiton, Aliceville, Cordova, Dora, Carbon Hill, Gordo, Reform,
Millport, Carrollton, Lynn, Pickensville, Arley, Holt and Adamsville.

LAT...LON 3328 8830 3428 8759 3430 8711 3399 8711
      3399 8714 3389 8709 3386 8696 3392 8692
      3397 8677 3409 8669 3408 8669 3425 8650
      3304 8743 3294 8818 3296 8816 3300 8817
      3299 8834
TIME...MOT...LOC 1412Z 240DEG 55KT 3415 8702 3292 8798 

$$

75

The office that day

Everything else NWS Birmingham, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 30, 8:11 AM CDT	Special Weather Statement	BMX	Fayette, Lamar, Marion, Pickens, Winston	49 min
Mar 30, 12:45 PM CDT	Special Weather Statement	BMX	Dallas	60 min
Mar 30, 2:11 PM CDT	Special Weather Statement	BMX	Pike	64 min
Mar 30, 3:33 PM CDT	Special Weather Statement	BMX	Chilton	27 min
Mar 30, 3:42 PM CDT	Special Weather Statement	BMX	Greene, Hale, Marengo, Tuscaloosa	63 min
Mar 30, 3:51 PM CDT	Special Weather Statement	BMX	Jefferson	54 min
Mar 30, 5:24 PM CDT	Special Weather Statement	BMX	Cleburne	66 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.