Alert archive / Texas / Mesoscale Discussions in 2010

Mesoscale Discussion 2155

December 30, 201014 counties in Arkansas; 7 counties in Oklahoma; 15 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Dec 30, 2010, 8:52 PM CST for 14 counties in Arkansas; 7 counties in Oklahoma; 15 counties in Texas. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued
Dec 30, 2010, 8:52 PM CST (02:52 UTC)
Expired
Dec 30, 2010, 10:45 PM CST
In force
113 min
Issued by
the Storm Prediction Center
All 36 counties

Crawford County, AR, Franklin County, AR, Hempstead County, AR, Howard County, AR, Little River County, AR, Logan County, AR, Miller County, AR, Montgomery County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Yell County, AR, Choctaw County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, McCurtain County, OK, Pushmataha County, OK, Sequoyah County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Delta County, TX, Fannin County, TX, Franklin County, TX, Hopkins County, TX, Hunt County, TX, Lamar County, TX, Marion County, TX, Morris County, TX, Rains County, TX, Red River County, TX, Titus County, TX, Wood County, TX

The radar

The Western Arkansas radar (KSRX), 109 km from the middle of the area, began a volume at 02:51 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

Norman, OK (KOUN), launched 00:00Z, 2.9 hours before the alert went out and 261 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, Norman, OK at 00:00Z on 2010-12-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Norman, OK at 00:00Z on 2010-12-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 150 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2966 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
150 m²/s²
0-3 km storm-relative helicity
133 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Dec 31, 12:44 AM CSTMesoscale DiscussionSPCBenton, Boone, Carroll, Madison, Marion, Washington61 min
Dec 31, 1:03 AM CSTTornado WatchSPCBenton, Carroll, Crawford, Madison, Washington7 hr
Dec 31, 3:27 AM CSTMesoscale DiscussionSPCBenton, Carroll2 hr
Dec 31, 4:56 AM CSTMesoscale DiscussionSPCArkansas, Clay, Cleburne, Cleveland, Craighead, Cross and 25 more2 hr
Dec 31, 5:45 AM CSTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 25 more2 hr
Dec 31, 7:29 AM CSTTornado WatchSPCBaxter, Benton, Boone, Carroll, Clark, Cleburne and 31 more8 hr
Dec 31, 10:36 AM CSTMesoscale DiscussionSPCColumbia, Hempstead, Lafayette, Miller, Nevada114 min
Dec 31, 11:04 AM CSTMesoscale DiscussionSPCClay, Craighead, Greene56 min
Dec 31, 11:42 AM CSTTornado WatchSPCClay, Craighead, Greene, Lawrence, Mississippi, Poinsett and 1 more7 hr
Dec 31, 1:34 PM CSTTornado WatchSPCAshley, Chicot6 hr
Dec 31, 3:58 PM CSTTornado WatchSPCAshley, Chicot, Crittenden, Cross, Lee, Phillips and 1 more7 hr
Dec 31, 5:35 PM CSTMesoscale DiscussionSPCArkansas, Crittenden, Desha, Lee, Mississippi, Phillips and 1 more115 min
Dec 30, 8:18 PM CSTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Collingsworth, Crosby, Dickens and 12 more87 min

Nearby

Mesoscale Discussions in Texas, 2010Mesoscale Discussions in Arkansas, 2010Mesoscale Discussions in Oklahoma, 2010Every mesoscale discussion in 2010

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.