Alert archive / Alabama / Mesoscale Discussions in 2016

Mesoscale Discussion 133

February 23, 20168 counties in Alabama; 8 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Feb 23, 2016, 7:23 PM CST for 8 counties in Alabama; 8 counties in Mississippi. It was in force for 37 min.

The area

The outline as issued.

The facts

Issued
Feb 23, 2016, 7:23 PM CST (01:23 UTC)
Expired
Feb 23, 2016, 8:00 PM CST
In force
37 min
Issued by
the Storm Prediction Center

Counties Bibb County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Marengo County, AL, Pickens County, AL, Sumter County, AL, Tuscaloosa County, AL, Choctaw County, MS, Clay County, MS, Kemper County, MS, Lowndes County, MS, Noxubee County, MS, Oktibbeha County, MS, Webster County, MS, Winston County, MS

The radar

The Columbus AFB radar (KGWX), 97 km from the middle of the area, began a volume at 01:27 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 00:00Z, 1.4 hours before the alert went out and 132 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-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2016-02-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 37 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2016-02-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 183 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
37 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
626 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
183 m²/s²
0-3 km storm-relative helicity
202 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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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 23, 8:08 PM CSTTornado WatchSPCButler, Coffee, Conecuh, Covington, Crenshaw, Dale and 5 more9 hr
Feb 23, 9:07 PM CSTMesoscale DiscussionSPCBarbour, Bullock, Chambers, Clay, Coffee, Covington and 13 more53 min

Nearby

Mesoscale Discussions in Alabama, 2016Mesoscale Discussions in Mississippi, 2016Every mesoscale discussion in 2016

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.