Alert archive / Alabama / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 159, NWS Birmingham, AL

April 13, 2009Barbour County, Bullock County, Russell County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Apr 13, 2009, 4:30 AM CDT for Barbour County, Bullock County, Russell County, Alabama. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 13, 2009, 4:30 AM CDT (09:30 UTC)
Expired: Apr 13, 2009, 5:15 AM CDT
In force: 45 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Barbour County, AL, Bullock County, AL, Russell County, AL

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 13, 2:33 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 9.5 hours before the alert went out and 167 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1940 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 190 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Apr 13, 3:27 AM CDT, 1 hour 3 minutes earlier.

Area forecast discussion, Apr 13, 3:27 AM CDT, 1 hour 3 minutes before

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Hazardous weather outlook, Apr 13, 1:51 AM CDT, 2 hours 39 minutes before

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In the hours before

Local storm report, Apr 13, 2:21 AM CDT, 2 hours 9 minutes before

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Special weather statement, Apr 13, 2:41 AM CDT, 1 hour 49 minutes before

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Special weather statement, Apr 13, 3:03 AM CDT, 1 hour 27 minutes before

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Local storm report, Apr 13, 3:43 AM CDT, 47 minutes before

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Local storm report, Apr 13, 3:51 AM CDT, 39 minutes before

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Local storm report, Apr 13, 4:17 AM CDT, 13 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 12, 8:45 PM CDT	Wind Advisory	BMX	Bibb, Blount, Chilton, Dallas, Fayette, Greene and 12 more	4 hr
Apr 12, 10:34 PM CDT	Severe Thunderstorm Warning	BMX	Marengo	41 min
Apr 12, 11:10 PM CDT	Severe Thunderstorm Warning	BMX	Marengo	35 min
Apr 12, 11:55 PM CDT	Severe Thunderstorm Warning	BMX	Dallas	35 min
Apr 13, 12:25 AM CDT	Severe Thunderstorm Warning	BMX	Dallas, Lowndes, Montgomery	35 min
Apr 13, 12:41 AM CDT	High Wind Warning	BMX	Autauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 20 more	7 hr
Apr 13, 1:00 AM CDT	Severe Thunderstorm Warning	BMX	Lowndes, Montgomery	45 min
Apr 13, 4:53 AM CDT	Tornado Warning	BMX	Barbour, Russell	27 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2009 Every severe thunderstorm warning in 2009

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.