Alert archive / Alabama / Mesoscale Discussions in 2006

Mesoscale Discussion 815

May 9, 200626 counties in Alabama; 18 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at May 9, 2006, 6:33 PM CDT for 26 counties in Alabama; 18 counties in Mississippi. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued
May 9, 2006, 6:33 PM CDT (23:33 UTC)
Expired
May 9, 2006, 7:30 PM CDT
In force
57 min
Issued by
the Storm Prediction Center
All 44 counties

Autauga County, AL, Barbour County, AL, Bullock County, AL, Butler County, AL, Choctaw County, AL, Clarke County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Dallas County, AL, Elmore County, AL, Escambia County, AL, Greene County, AL, Hale County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pike County, AL, Sumter County, AL, Washington County, AL, Wilcox County, AL, Clarke County, MS, Covington County, MS, Greene County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Madison County, MS, Neshoba County, MS, Newton County, MS, Perry County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Wayne County, MS

The radar

The Birmingham radar (KBMX), 152 km from the middle of the area, began a volume at 23:34 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 12:00Z, 11.6 hours before the alert went out and 152 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 12:00Z on 2006-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 84 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 12:00Z on 2006-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 136 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
84 J/kg
Mixed-layer CIN
-123 J/kg
Mixed-layer LCL
587 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
136 m²/s²
0-3 km storm-relative helicity
191 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 8, 7:42 PM CDTMesoscale DiscussionSPCBaldwin, Barbour, Bullock, Butler, Choctaw, Clarke and 17 more93 min
May 8, 7:56 PM CDTSevere Thunderstorm WatchSPCBaldwin, Clarke, Conecuh, Covington, Escambia, Mobile and 2 more5 hr
May 8, 10:00 PM CDTMesoscale DiscussionSPCCoffee, Dale, Geneva, Henry, Houston2 hr
May 9, 9:47 AM CDTMesoscale DiscussionSPCBaldwin, Escambia, Mobile, Washington118 min
May 9, 10:26 AM CDTSevere Thunderstorm WatchSPCBaldwin, Choctaw, Clarke, Conecuh, Escambia, Mobile and 2 more7 hr
May 9, 12:29 PM CDTMesoscale DiscussionSPCLauderdale, Limestone, Madison91 min
May 9, 2:55 PM CDTMesoscale DiscussionSPCColbert, Cullman, Franklin, Lauderdale, Lawrence, Limestone and 5 more2 hr
May 9, 3:57 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Butler, Chilton, Choctaw, Clarke and 15 more2 hr
May 9, 4:47 PM CDTSevere Thunderstorm WatchSPCAutauga, Bibb, Blount, Butler, Chilton, Choctaw and 28 more5 hr
May 9, 12:29 PM CDTSevere Thunderstorm WatchSPCAttala, Carroll, Choctaw, Clarke, Clay, Covington and 22 more8 hr
May 9, 1:33 PM CDTMesoscale DiscussionSPCAlcorn, Benton, Calhoun, Carroll, Chickasaw, Clay and 22 more87 min

Nearby

Mesoscale Discussions in Alabama, 2006Mesoscale Discussions in Mississippi, 2006Every mesoscale discussion in 2006

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.