Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 2505

November 17, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Nov 17, 2003, 2:57 PM CST for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Nov 17, 2003, 2:57 PM CST (20:57 UTC)
Expired
Nov 17, 2003, 5:00 PM CST
In force
2 hr
Issued by
the Storm Prediction Center
All 81 counties

Clark County, AR, Columbia County, AR, Garland County, AR, Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Logan County, AR, Miller County, AR, Montgomery County, AR, Nevada County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Yell County, AR, Bossier Parish, LA, Caddo Parish, LA, De Soto Parish, LA, Webster Parish, LA, Atoka County, OK, Bryan County, OK, Choctaw County, OK, Coal County, OK, Haskell County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Marshall County, OK, McCurtain County, OK, Pittsburg County, OK, Pushmataha County, OK, Anderson County, TX, Bell County, TX, Bosque County, TX, Bowie County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Collin County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Ellis County, TX, Falls County, TX, Fannin County, TX, Franklin County, TX, Freestone County, TX, Grayson County, TX, Gregg County, TX, Harrison County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Houston County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Leon County, TX, Limestone County, TX, Marion County, TX, McLennan County, TX, Morris County, TX, Nacogdoches County, TX, Navarro County, TX, Panola County, TX, Rains County, TX, Red River County, TX, Robertson County, TX, Rockwall County, TX, Rusk County, TX, Shelby County, TX, Smith County, TX, Tarrant County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 154 km from the middle of the area, began a volume at 20:56 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, 9.0 hours before the alert went out and 174 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 2003-11-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1175 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, Fort Worth, TX at 12:00Z on 2003-11-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 153 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
1175 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
571 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
153 m²/s²
0-3 km storm-relative helicity
88 m²/s²
Significant tornado parameter
0.6
Supercell composite
3.1

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 17, 5:25 PM CSTMesoscale DiscussionSPCClark, Cleburne, Columbia, Conway, Dallas, Faulkner and 27 more65 min
Nov 17, 8:20 AM CSTTornado WatchSPCCalcasieu5 hr
Nov 17, 12:45 PM CSTTornado WatchSPCCalcasieu5 hr
Nov 17, 5:07 PM CSTMesoscale DiscussionSPCAcadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 14 more53 min
Nov 17, 5:35 PM CSTTornado WatchSPCBeauregard, Calcasieu, Vernon6 hr
Nov 17, 1:11 AM CSTMesoscale DiscussionSPCAlfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 18 more3 hr
Nov 17, 6:42 AM CSTMesoscale DiscussionSPCNowata, Osage, Washington3 hr
Nov 17, 7:43 AM CSTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Cleveland, Coal and 27 more3 hr
Nov 17, 8:15 AM CSTTornado WatchSPCAtoka, Bryan, Canadian, Carter, Cleveland, Coal and 37 more5 hr
Nov 17, 10:59 AM CSTMesoscale DiscussionSPCAtoka, Bryan, Canadian, Carter, Cleveland, Coal and 36 more91 min
Nov 17, 12:20 PM CSTTornado WatchSPCAtoka, Bryan, Carter, Choctaw, Cleveland, Coal and 18 more6 hr
Nov 16, 6:02 PM CSTMesoscale DiscussionSPCArmstrong, Briscoe, Childress, Cottle, Crosby, Dickens and 12 more118 min
Nov 17, 7:11 AM CSTMesoscale DiscussionSPCAnderson, Angelina, Austin, Brazos, Burleson, Cherokee and 40 more3 hr
Nov 17, 9:58 AM CSTMesoscale DiscussionSPCBandera, Bexar, Blanco, Brown, Burnet, Callahan and 36 more92 min
Nov 17, 10:21 AM CSTMesoscale DiscussionSPCBrazoria, Calhoun, Chambers, Fort Bend, Hardin, Harris and 6 more84 min
Nov 17, 11:50 AM CSTMesoscale DiscussionSPCAnderson, Angelina, Aransas, Austin, Bell, Bosque and 75 more85 min
Nov 17, 3:02 PM CSTMesoscale DiscussionSPCAustin, Brazoria, Calhoun, Chambers, Colorado, DeWitt and 16 more88 min

Nearby

Mesoscale Discussions in Texas, 2003Mesoscale Discussions in Arkansas, 2003Mesoscale Discussions in Oklahoma, 2003Every mesoscale discussion in 2003

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.