Alert archive / Oklahoma / Mesoscale Discussions in 2003

Mesoscale Discussion 1071

May 19, 200333 counties in Oklahoma; 7 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 19, 2003, 11:47 PM CDT for 33 counties in Oklahoma; 7 counties in Texas. It was in force for 118 min.

The area

The outline as issued.

The facts

Issued: May 19, 2003, 11:47 PM CDT (04:47 UTC)
Expired: May 20, 2003, 1:45 AM CDT
In force: 118 min
Issued by: the Storm Prediction Center

All 40 counties

Atoka County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cherokee County, OK, Cleveland County, OK, Coal County, OK, Comanche 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, Love County, OK, Marshall County, OK, McClain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Tulsa County, OK, Wagoner County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Knox County, TX, Montague County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Norman radar (KTLX), 76 km from the middle of the area, began a volume at 04:46 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 00:00Z, 4.8 hours before the alert went out and 60 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: 1418 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 913 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 293 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 9.8

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 19, 8:56 PM CDT	Mesoscale Discussion	SPC	Carter, Cleveland, Coal, Comanche, Cotton, Creek and 18 more	64 min
May 19, 9:30 PM CDT	Severe Thunderstorm Watch	SPC	Atoka, Caddo, Canadian, Carter, Cleveland, Coal and 26 more	6 hr

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.