Alert archive / Oklahoma / Mesoscale Discussions in 2003

Mesoscale Discussion 2500

November 17, 200333 counties in Oklahoma; 5 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Nov 17, 2003, 7:43 AM CST for 33 counties in Oklahoma; 5 counties in Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Nov 17, 2003, 7:43 AM CST (13:43 UTC)
Expired
Nov 17, 2003, 10:15 AM CST
In force
3 hr
Issued by
the Storm Prediction Center
All 38 counties

Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Cotton County, OK, Creek County, OK, Garvin County, OK, Grady County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Marshall County, OK, McClain County, OK, McIntosh County, OK, Murray County, OK, Noble County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Pawnee County, OK, Payne County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Seminole County, OK, Stephens County, OK, Tulsa County, OK, Cooke County, TX, Fannin County, TX, Grayson County, TX, Lamar County, TX, Montague County, TX

The radar

The Norman radar (KTLX), 100 km from the middle of the area, began a volume at 13:47 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

Norman, OK (KOUN), launched 12:00Z, 1.7 hours before the alert went out and 101 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 12:00Z on 2003-11-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1328 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, Norman, OK at 12:00Z on 2003-11-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 187 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
1328 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
493 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
187 m²/s²
0-3 km storm-relative helicity
177 m²/s²
Significant tornado parameter
1.0
Supercell composite
7.7

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, 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, 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 17, 2:57 PM CSTMesoscale DiscussionSPCAtoka, Bryan, Choctaw, Coal, Haskell, Johnston and 6 more2 hr
Nov 17, 5:25 PM CSTMesoscale DiscussionSPCLeFlore, McCurtain65 min
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, 8:20 AM CSTTornado WatchSPCAnderson, Angelina, Austin, Bastrop, Bell, Brazoria and 54 more5 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, 12:45 PM CSTTornado WatchSPCBrazoria, Calhoun, Chambers, Colorado, DeWitt, Fort Bend and 15 more5 hr
Nov 17, 3:02 PM CSTMesoscale DiscussionSPCAustin, Brazoria, Calhoun, Chambers, Colorado, DeWitt and 16 more88 min
Nov 17, 5:07 PM CSTMesoscale DiscussionSPCAngelina, Brazoria, Calhoun, Chambers, Fort Bend, Galveston and 14 more53 min
Nov 17, 5:35 PM CSTTornado WatchSPCChambers, Galveston, Hardin, Jasper, Jefferson, Newton and 2 more6 hr

Nearby

Mesoscale Discussions in Oklahoma, 2003Mesoscale Discussions in Texas, 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.