Alert archive / Alabama / Special Weather Statements in 2018

Special Weather Statement, NWS Mobile, AL

August 18, 2018Washington County, Alabama

NWS Mobile, AL issued this special weather statement at Aug 18, 2018, 2:39 PM CDT for Washington County, Alabama. It was in force for 51 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: Aug 18, 2018, 2:39 PM CDT (19:39 UTC)
Expired: Aug 18, 2018, 3:30 PM CDT
In force: 51 min
Issued by: NWS Mobile, AL

County Washington County, AL

The radar

The Mobile radar (KMOB), 84 km from the middle of the area, began a volume at 19:41 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.7 hours before the alert went out and 205 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: 2057 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 720 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: -5 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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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 2:03 PM CDT	Areal Flood Advisory	MOB	Choctaw	3 hr
Aug 18, 3:00 PM CDT	Areal Flood Advisory	MOB	Washington	3 hr
Aug 18, 3:55 PM CDT	Areal Flood Advisory	MOB	Conecuh, Monroe	3 hr
Aug 18, 4:19 PM CDT	Special Weather Statement	MOB	Butler	41 min
Aug 18, 5:26 PM CDT	Areal Flood Advisory	MOB	Butler, Conecuh, Monroe	2 hr
Aug 18, 4:35 PM CDT	Areal Flood Advisory	MOB	Greene, Perry	3 hr
Aug 18, 5:54 PM CDT	Special Weather Statement	MOB	George	51 min
Aug 18, 6:24 PM CDT	Special Weather Statement	MOB	George	51 min

Nearby

Special Weather Statements in Alabama, 2018 Every special weather statement in 2018

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.