Alert archive / Alabama / Special Weather Statements in 2017

Special Weather Statement, NWS Mobile, AL

April 5, 2017Crenshaw County, Alabama

NWS Mobile, AL issued this special weather statement at Apr 5, 2017, 9:13 PM CDT for Crenshaw County, 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: Apr 5, 2017, 9:13 PM CDT (02:13 UTC)
Expired: Apr 5, 2017, 10:00 PM CDT
In force: 47 min
Issued by: NWS Mobile, AL

County Crenshaw County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 2.2 hours before the alert went out and 168 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: 574 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 2086 m above ground
0-6 km bulk shear: 81 kt
0-1 km storm-relative helicity: 98 m²/s²
0-3 km storm-relative helicity: 199 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.2

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 Mobile, AL wrote its last area forecast discussion before this special weather statement went out at Apr 5, 6:51 PM CDT, 2 hours 22 minutes earlier.

Area forecast discussion, Apr 5, 6:51 PM CDT, 2 hours 22 minutes before

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Hazardous weather outlook, Apr 5, 3:19 PM CDT, 5 hours 54 minutes before

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In the hours before

Special weather statement, Apr 5, 3:47 PM CDT, 5 hours 26 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 8:54 PM CDT	Special Weather Statement	MOB	Crenshaw	36 min
Apr 6, 1:10 PM CDT	Wind Advisory	MOB	Baldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 4 more	6 hr

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.