Alert archive / Texas / Mesoscale Discussions in 2005

Mesoscale Discussion 2474

November 27, 200515 counties in Arkansas; 14 counties in Oklahoma; 25 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Nov 27, 2005, 1:48 PM CST for 15 counties in Arkansas; 14 counties in Oklahoma; 25 counties in Texas. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Nov 27, 2005, 1:48 PM CST (19:48 UTC)
Expired
Nov 27, 2005, 3:45 PM CST
In force
117 min
Issued by
the Storm Prediction Center
All 54 counties

Crawford County, AR, Franklin County, AR, Hempstead County, AR, Howard County, AR, Little River County, AR, Logan County, AR, Madison County, AR, Miller County, AR, Montgomery County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Washington County, AR, Adair County, OK, Cherokee County, OK, Choctaw County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, Mayes County, OK, McCurtain County, OK, McIntosh County, OK, Muskogee County, OK, Pittsburg County, OK, Pushmataha County, OK, Sequoyah County, OK, Wagoner County, OK, Anderson County, TX, Bowie County, TX, Camp County, TX, Cass County, TX, Delta County, TX, Franklin County, TX, Freestone County, TX, Gregg County, TX, Harrison County, TX, Henderson County, TX, Hopkins County, TX, Hunt County, TX, Kaufman County, TX, Lamar County, TX, Limestone County, TX, Marion County, TX, Morris County, TX, Navarro County, TX, Rains County, TX, Red River County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Western Arkansas radar (KSRX), 171 km from the middle of the area, began a volume at 19:49 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

Shreveport, LA (KSHV), launched 12:00Z, 7.8 hours before the alert went out and 210 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, Shreveport, LA at 12:00Z on 2005-11-27Temperature 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 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 12:00Z on 2005-11-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 212 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
720 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
212 m²/s²
0-3 km storm-relative helicity
195 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
Nov 27, 2:20 PM CSTTornado WatchSPCBaxter, Benton, Boone, Calhoun, Carroll, Clark and 40 more8 hr
Nov 27, 4:39 PM CSTMesoscale DiscussionSPCArkansas, Bradley, Clay, Cleburne, Cleveland, Craighead and 24 more96 min
Nov 27, 5:07 PM CSTMesoscale DiscussionSPCClark, Conway, Faulkner, Garland, Hempstead, Hot Spring and 14 more113 min
Nov 27, 11:58 AM CSTMesoscale DiscussionSPCCraig, Creek, Kay, Lincoln, Mayes, Nowata and 9 more2 hr
Nov 27, 12:36 PM CSTTornado WatchSPCCraig, Delaware, Mayes, Nowata, Osage, Ottawa and 2 more7 hr
Nov 27, 2:50 PM CSTMesoscale DiscussionSPCCraig, Nowata, Ottawa, Washington115 min

Nearby

Mesoscale Discussions in Texas, 2005Mesoscale Discussions in Arkansas, 2005Mesoscale Discussions in Oklahoma, 2005Every mesoscale discussion in 2005

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.