Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 961

May 13, 2003Barber County, Harper County, Kansas; 17 counties in Oklahoma; 20 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 13, 2003, 5:04 PM CDT for Barber County, Harper County, Kansas; 17 counties in Oklahoma; 20 counties in Texas. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: May 13, 2003, 5:04 PM CDT (22:04 UTC)
Expired: May 13, 2003, 6:30 PM CDT
In force: 86 min
Issued by: the Storm Prediction Center

All 39 counties

Barber County, KS, Harper County, KS, Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Custer County, OK, Dewey County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Major County, OK, Noble County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Baylor County, TX, Coke County, TX, Cottle County, TX, Crockett County, TX, Fisher County, TX, Foard County, TX, Hardeman County, TX, Haskell County, TX, Irion County, TX, Jones County, TX, King County, TX, Knox County, TX, Nolan County, TX, Runnels County, TX, Schleicher County, TX, Sterling County, TX, Stonewall County, TX, Taylor County, TX, Tom Green County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 93 km from the middle of the area, began a volume at 22:06 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

Norman, OK (KOUN), launched 12:00Z, 10.1 hours before the alert went out and 170 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: 346 J/kg
Mixed-layer CIN: -241 J/kg
Mixed-layer LCL: 787 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 173 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.0

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 13, 5:31 AM CDT	Mesoscale Discussion	SPC	Clay, Cloud, Dickinson, Ellsworth, Geary, Jewell and 8 more	3 hr
May 13, 10:08 AM CDT	Mesoscale Discussion	SPC	Allen, Bourbon, Butler, Chautauqua, Cherokee, Coffey and 11 more	97 min
May 13, 1:53 PM CDT	Mesoscale Discussion	SPC	Harper, Sumner	97 min
May 13, 6:20 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Clay, Cloud, Dickinson, Jewell, Marshall and 6 more	5 hr
May 13, 5:50 AM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Choctaw, Cleveland, Coal, Garvin and 7 more	3 hr
May 13, 1:18 PM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Delaware, Haskell, LeFlore, Mayes and 2 more	87 min
May 13, 2:20 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Cherokee, Haskell, Latimer, LeFlore, McIntosh and 8 more	6 hr
May 13, 3:33 PM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Haskell, Latimer, LeFlore, McIntosh and 3 more	87 min
May 13, 5:45 PM CDT	Severe Thunderstorm Watch	SPC	McCurtain	4 hr
May 13, 6:18 PM CDT	Mesoscale Discussion	SPC	Latimer, LeFlore, McCurtain	87 min

Nearby

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