Alert archive / Alabama / Special Weather Statements in 2018

Special Weather Statement, NWS Birmingham, AL

November 7, 2018Marengo County, Alabama

NWS Birmingham, AL issued this special weather statement at Nov 7, 2018, 10:39 AM CST for Marengo 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: Nov 7, 2018, 10:39 AM CST (16:39 UTC)
Expired: Nov 7, 2018, 11:30 AM CST
In force: 51 min
Issued by: NWS Birmingham, AL

County Marengo County, AL

The radar

The Birmingham radar (KBMX), 156 km from the middle of the area, began a volume at 16:43 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

Jackson, MS (KJAN), launched 12:00Z, 4.7 hours before the alert went out and 197 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: 70 J/kg
Mixed-layer CIN: -195 J/kg
Mixed-layer LCL: 622 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 214 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Birmingham, AL wrote its last area forecast discussion before this special weather statement went out at Nov 6, 3:23 PM CST, 19 hours 16 minutes earlier.

Area forecast discussion, Nov 6, 3:23 PM CST, 19 hours 16 minutes before

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Hazardous weather outlook, Nov 6, 11:09 AM CST, 23 hours 30 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
Nov 7, 9:59 AM CST	Special Weather Statement	BMX	Greene	46 min
Nov 7, 10:05 AM CST	Special Weather Statement	BMX	Fayette	40 min
Nov 7, 10:46 AM CST	Special Weather Statement	BMX	Tuscaloosa	44 min
Nov 7, 11:32 AM CST	Special Weather Statement	BMX	Shelby	43 min
Nov 7, 11:54 AM CST	Special Weather Statement	BMX	Shelby	36 min
Nov 7, 12:13 PM CST	Special Weather Statement	BMX	Shelby	32 min
Nov 7, 12:40 PM CST	Special Weather Statement	BMX	Dallas	35 min
Nov 7, 1:34 PM CST	Special Weather Statement	BMX	Clay	26 min
Nov 7, 1:48 PM CST	Special Weather Statement	BMX	Montgomery	42 min
Nov 7, 2:17 PM CST	Special Weather Statement	BMX	Lee, Macon, Tallapoosa	28 min
Nov 7, 2:39 PM CST	Special Weather Statement	BMX	Lee	36 min
Nov 7, 3:03 PM CST	Special Weather Statement	BMX	Russell	27 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.