Alert archive / Oklahoma / Mesoscale Discussions in 2006

Mesoscale Discussion 816

May 9, 200615 counties in Oklahoma; 8 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 9, 2006, 8:06 PM CDT for 15 counties in Oklahoma; 8 counties in Texas. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
May 9, 2006, 8:06 PM CDT (01:06 UTC)
Expired
May 9, 2006, 9:30 PM CDT
In force
84 min
Issued by
the Storm Prediction Center
All 23 counties

Beckham County, OK, Caddo County, OK, Canadian County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Grady County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Roger Mills County, OK, Tillman County, OK, Washita County, OK, Childress County, TX, Collingsworth County, TX, Donley County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, Wheeler County, TX

The radar

The Altus AFB radar (KFDR), 111 km from the middle of the area, began a volume at 01:07 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Fort Sill, OK (KFSI), launched 00:00Z, 1.1 hours before the alert went out and 133 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, Fort Sill, OK at 00:00Z on 2006-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1424 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Sill, OK at 00:00Z on 2006-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 75 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
1424 J/kg
Mixed-layer CIN
-132 J/kg
Mixed-layer LCL
1426 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
75 m²/s²
0-3 km storm-relative helicity
236 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.5

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 9, 9:18 PM CDTTornado WatchSPCMcCurtain6 hr
May 9, 9:38 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Caddo, Carter, Choctaw, Cleveland and 25 more97 min
May 9, 10:46 PM CDTSevere Thunderstorm WatchSPCAtoka, Bryan, Caddo, Canadian, Carter, Choctaw and 22 more7 hr
May 10, 4:01 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Caddo, Carter, Choctaw, Cleveland and 28 more89 min
May 10, 4:24 AM CDTSevere Thunderstorm WatchSPCMcCurtain8 hr
May 10, 5:18 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Cotton, Jefferson and 6 more87 min
May 10, 6:27 AM CDTMesoscale DiscussionSPCBowie, Red River93 min
May 10, 12:50 PM CDTMesoscale DiscussionSPCAngelina, Nacogdoches, Panola, Sabine, San Augustine, Shelby and 1 more115 min
May 10, 1:13 PM CDTTornado WatchSPCAngelina, Cherokee, Hardin, Jasper, Nacogdoches, Newton and 6 more8 hr
May 10, 2:34 PM CDTMesoscale DiscussionSPCAransas, Austin, Bee, Brazoria, Brooks, Calhoun and 26 more116 min
May 10, 2:59 PM CDTSevere Thunderstorm WatchSPCAustin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 11 more5 hr
May 10, 3:20 PM CDTSevere Thunderstorm WatchSPCAransas, Bee, Brooks, Calhoun, Cameron, DeWitt and 15 more7 hr
May 10, 5:04 PM CDTMesoscale DiscussionSPCBrazoria, Calhoun, Chambers, Colorado, Fort Bend, Galveston and 5 more116 min
May 10, 6:06 PM CDTMesoscale DiscussionSPCAransas, Brooks, Hidalgo, Jim Hogg, Jim Wells, Kenedy and 6 more114 min

Nearby

Mesoscale Discussions in Oklahoma, 2006Mesoscale Discussions in Texas, 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.