Alert archive / Oklahoma / Mesoscale Discussions in 2007

Mesoscale Discussion 48

January 13, 20074 counties in Arkansas; 27 counties in Oklahoma; 10 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jan 13, 2007, 6:28 AM CST for 4 counties in Arkansas; 27 counties in Oklahoma; 10 counties in Texas. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Jan 13, 2007, 6:28 AM CST (12:28 UTC)
Expired
Jan 13, 2007, 10:30 AM CST
In force
4 hr
Issued by
the Storm Prediction Center
All 41 counties

Crawford County, AR, Franklin County, AR, Sebastian County, AR, Washington County, AR, Adair County, OK, Atoka County, OK, Bryan County, OK, Carter County, OK, Cherokee County, OK, Choctaw County, OK, Coal County, OK, Delaware County, OK, Haskell County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Love County, OK, Marshall County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Seminole County, OK, Sequoyah County, OK, Wagoner County, OK, Clay County, TX, Collin County, TX, Cooke County, TX, Denton County, TX, Fannin County, TX, Grayson County, TX, Jack County, TX, Montague County, TX, Tarrant County, TX, Wise County, TX

The radar

The Western Arkansas radar (KSRX), 135 km from the middle of the area, began a volume at 12:29 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

Fort Worth, TX (KFWD), launched 12:00Z, 0.5 hours before the alert went out and 258 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 Worth, TX at 12:00Z on 2007-01-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 61 joules per kilogram.LCLEL10008507005003002001001 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, Fort Worth, TX at 12:00Z on 2007-01-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 294 square meters per square second.1939587897Sfc1 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
61 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
247 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
294 m²/s²
0-3 km storm-relative helicity
360 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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
Jan 12, 6:33 PM CSTMesoscale DiscussionSPCBenton, Carroll, Washington5 hr
Jan 13, 5:49 PM CSTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Cleveland, Columbia and 10 more3 hr
Jan 12, 6:06 PM CSTMesoscale DiscussionSPCAdair, Atoka, Canadian, Carter, Cherokee, Cleveland and 32 more3 hr
Jan 13, 7:47 AM CSTMesoscale DiscussionSPCAlfalfa, Craig, Garfield, Grant, Kay, Kingfisher and 11 more4 hr
Jan 13, 12:36 PM CSTMesoscale DiscussionSPCAtoka, Bryan, Carter, Cherokee, Cleveland, Coal and 30 more4 hr
Jan 13, 10:25 AM CSTMesoscale DiscussionSPCAtascosa, Bastrop, Bell, Bexar, Blanco, Caldwell and 13 more2 hr

Nearby

Mesoscale Discussions in Oklahoma, 2007Mesoscale Discussions in Texas, 2007Mesoscale Discussions in Arkansas, 2007Every mesoscale discussion in 2007

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.