Alert archive / Oklahoma / Mesoscale Discussions in 2003

Mesoscale Discussion 954

May 13, 200313 counties in Oklahoma; 4 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 13, 2003, 5:50 AM CDT for 13 counties in Oklahoma; 4 counties in Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: May 13, 2003, 5:50 AM CDT (10:50 UTC)
Expired: May 13, 2003, 8:45 AM CDT
In force: 3 hr
Issued by: the Storm Prediction Center

Counties Atoka County, OK, Bryan County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Garvin County, OK, Hughes County, OK, Johnston County, OK, Marshall County, OK, Murray County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Collin County, TX, Fannin County, TX, Grayson County, TX, Lamar County, TX

The radar

The Norman radar (KTLX), 119 km from the middle of the area, began a volume at 10:49 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 00:00Z, 10.8 hours before the alert went out and 185 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2538 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 148 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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
May 13, 10:08 AM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Craig, Creek, Delaware, Grant and 17 more	97 min
May 13, 1:18 PM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Delaware, Haskell, LeFlore, Mayes and 2 more	87 min
May 13, 1:53 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Canadian, Cleveland, Creek, Garfield and 12 more	97 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, 5:04 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beckham, Blaine, Caddo, Custer, Dewey and 11 more	86 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 Oklahoma, 2003 Mesoscale Discussions in Texas, 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.