Alert archive / Arkansas / Mesoscale Discussions in 2003

Mesoscale Discussion 2509

November 17, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Nov 17, 2003, 5:25 PM CST for 4 states. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: Nov 17, 2003, 5:25 PM CST (23:25 UTC)
Expired: Nov 17, 2003, 6:30 PM CST
In force: 65 min
Issued by: the Storm Prediction Center

All 59 counties

Clark County, AR, Cleburne County, AR, Columbia County, AR, Conway County, AR, Dallas County, AR, Faulkner County, AR, Franklin County, AR, Garland County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Johnson County, AR, Lafayette County, AR, Little River County, AR, Logan County, AR, Lonoke County, AR, Miller County, AR, Montgomery County, AR, Nevada County, AR, Ouachita County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pope County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Van Buren County, AR, White County, AR, Yell County, AR, Bossier Parish, LA, Caddo Parish, LA, Webster Parish, LA, LeFlore County, OK, McCurtain County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Delta County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Henderson County, TX, Hopkins County, TX, Lamar County, TX, Marion County, TX, Morris County, TX, Panola County, TX, Rains County, TX, Red River County, TX, Rusk County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 143 km from the middle of the area, began a volume at 23:28 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.

Tornado Watch 954Nov 17, 9:25 PM CST

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 11.4 hours before the alert went out and 307 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

Issued	Product	Office	Counties	Lasted
Nov 17, 2:57 PM CST	Mesoscale Discussion	SPC	Clark, Columbia, Garland, Hempstead, Howard, Lafayette and 11 more	2 hr
Nov 17, 8:20 AM CST	Tornado Watch	SPC	Calcasieu	5 hr
Nov 17, 12:45 PM CST	Tornado Watch	SPC	Calcasieu	5 hr
Nov 17, 5:07 PM CST	Mesoscale Discussion	SPC	Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 14 more	53 min
Nov 17, 5:35 PM CST	Tornado Watch	SPC	Beauregard, Calcasieu, Vernon	6 hr
Nov 17, 1:11 AM CST	Mesoscale Discussion	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 18 more	3 hr
Nov 17, 6:42 AM CST	Mesoscale Discussion	SPC	Nowata, Osage, Washington	3 hr
Nov 17, 7:43 AM CST	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Choctaw, Cleveland, Coal and 27 more	3 hr
Nov 17, 8:15 AM CST	Tornado Watch	SPC	Atoka, Bryan, Canadian, Carter, Cleveland, Coal and 37 more	5 hr
Nov 17, 10:59 AM CST	Mesoscale Discussion	SPC	Atoka, Bryan, Canadian, Carter, Cleveland, Coal and 36 more	91 min
Nov 17, 12:20 PM CST	Tornado Watch	SPC	Atoka, Bryan, Carter, Choctaw, Cleveland, Coal and 18 more	6 hr
Nov 16, 6:02 PM CST	Mesoscale Discussion	SPC	Armstrong, Briscoe, Childress, Cottle, Crosby, Dickens and 12 more	118 min
Nov 17, 7:11 AM CST	Mesoscale Discussion	SPC	Anderson, Angelina, Austin, Brazos, Burleson, Cherokee and 40 more	3 hr
Nov 17, 9:58 AM CST	Mesoscale Discussion	SPC	Bandera, Bexar, Blanco, Brown, Burnet, Callahan and 36 more	92 min
Nov 17, 10:21 AM CST	Mesoscale Discussion	SPC	Brazoria, Calhoun, Chambers, Fort Bend, Hardin, Harris and 6 more	84 min
Nov 17, 11:50 AM CST	Mesoscale Discussion	SPC	Anderson, Angelina, Aransas, Austin, Bell, Bosque and 75 more	85 min
Nov 17, 3:02 PM CST	Mesoscale Discussion	SPC	Austin, Brazoria, Calhoun, Chambers, Colorado, DeWitt and 16 more	88 min

Nearby

Mesoscale Discussions in Arkansas, 2003 Mesoscale Discussions in Texas, 2003 Mesoscale Discussions in Louisiana, 2003 Every 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.