Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 1009

May 15, 20035 counties in Oklahoma; 21 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 15, 2003, 8:38 PM CDT for 5 counties in Oklahoma; 21 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 15, 2003, 8:38 PM CDT (01:38 UTC)
Expired: May 15, 2003, 10:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 26 counties

Cotton County, OK, Jackson County, OK, Jefferson County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Eastland County, TX, Foard County, TX, Hardeman County, TX, Haskell County, TX, Hood County, TX, Jack County, TX, Jones County, TX, Knox County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Shackelford County, TX, Stephens County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Wise County, TX, Young County, TX

The radar

The Altus AFB radar (KFDR), 80 km from the middle of the area, began a volume at 01:41 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 387May 15, 10:25 PM CDT

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 1.6 hours before the alert went out and 173 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: 2441 J/kg
Mixed-layer CIN: -99 J/kg
Mixed-layer LCL: 748 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 10.5

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.

Issued	Product	Office	Counties	Lasted
May 15, 10:25 PM CDT	Tornado Watch	SPC	Cotton, Jackson, Jefferson, Stephens, Tillman	6 hr
May 15, 10:30 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beaver, Beckham, Blaine, Custer, Dewey and 8 more	2 hr
May 15, 11:32 PM CDT	Mesoscale Discussion	SPC	Cimarron, Texas	118 min
May 15, 11:35 PM CDT	Tornado Watch	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 13 more	4 hr
May 15, 11:49 PM CDT	Mesoscale Discussion	SPC	Cotton, Jackson, Jefferson, Stephens, Tillman	86 min
May 16, 1:20 AM CDT	Tornado Watch	SPC	Atoka, Bryan, Carter, Choctaw, Cleveland, Coal and 33 more	6 hr
May 16, 1:22 AM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Caddo, Canadian, Cleveland, Custer and 16 more	53 min
May 16, 2:33 AM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Choctaw, Cleveland, Coal and 16 more	57 min
May 16, 3:07 AM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Choctaw, Cleveland, Coal and 33 more	53 min
May 16, 4:04 AM CDT	Mesoscale Discussion	SPC	Adair, Atoka, Bryan, Carter, Cherokee, Choctaw and 36 more	56 min
May 16, 4:25 AM CDT	Severe Thunderstorm Watch	SPC	Adair, Cherokee, Craig, Delaware, Haskell, LeFlore and 4 more	5 hr
May 16, 5:22 AM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Choctaw, Coal, Johnston, Latimer and 10 more	53 min
May 16, 5:47 AM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Delaware, Haskell, LeFlore, McCurtain and 2 more	58 min
May 16, 6:35 AM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Delaware, Haskell, LeFlore, McCurtain and 2 more	25 min
May 16, 9:16 AM CDT	Mesoscale Discussion	SPC	Choctaw, Latimer, McCurtain, Pushmataha	119 min
May 16, 11:35 AM CDT	Mesoscale Discussion	SPC	Caddo, Canadian, Cleveland, Creek, Garfield, Grady and 20 more	2 hr
May 16, 12:00 PM CDT	Tornado Watch	SPC	Adair, Canadian, Cherokee, Craig, Creek, Delaware and 23 more	6 hr
May 16, 12:09 PM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Choctaw, Haskell, Latimer, LeFlore and 3 more	3 hr
May 16, 12:45 PM CDT	Tornado Watch	SPC	Atoka, Bryan, Choctaw, Coal, Haskell, Hughes and 10 more	5 hr
May 16, 1:46 PM CDT	Mesoscale Discussion	SPC	Cherokee, Creek, Lincoln, Logan, McIntosh, Mayes and 12 more	89 min
May 16, 3:18 PM CDT	Mesoscale Discussion	SPC	LeFlore, McCurtain	117 min
May 16, 3:55 PM CDT	Tornado Watch	SPC	Adair	6 hr
May 16, 5:06 PM CDT	Mesoscale Discussion	SPC	McCurtain	54 min
May 16, 5:45 PM CDT	Tornado Watch	SPC	McCurtain	6 hr

Nearby

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