Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 1474

July 2, 20047 counties in Oklahoma; 23 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jul 2, 2004, 7:17 PM CDT for 7 counties in Oklahoma; 23 counties in Texas. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Jul 2, 2004, 7:17 PM CDT (00:17 UTC)
Expired: Jul 2, 2004, 8:45 PM CDT
In force: 88 min
Issued by: the Storm Prediction Center

All 30 counties

Comanche County, OK, Cotton County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Callahan County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Eastland County, TX, Fisher County, TX, Foard County, TX, Hardeman County, TX, Haskell County, TX, Jones County, TX, King County, TX, Knox County, TX, Nolan County, TX, Shackelford County, TX, Stephens County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Young County, TX

The radar

The Altus AFB radar (KFDR), 98 km from the middle of the area, began a volume at 00:20 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, 0.3 hours before the alert went out and 231 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: 3016 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 1345 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 198 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 4.6

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
Jul 2, 7:51 PM CDT	Mesoscale Discussion	SPC	Cimarron, Texas	84 min
Jul 2, 8:26 PM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Coal, Creek, Delaware, Haskell and 14 more	94 min
Jul 2, 9:19 PM CDT	Mesoscale Discussion	SPC	Beaver, Cimarron, Ellis, Harper, Roger Mills, Texas	56 min
Jul 2, 10:39 PM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Creek, Delaware, Haskell, Latimer and 11 more	96 min
Jul 3, 1:01 AM CDT	Mesoscale Discussion	SPC	Atoka, Caddo, Canadian, Carter, Cleveland, Coal and 35 more	89 min
Jul 3, 1:15 AM CDT	Severe Thunderstorm Watch	SPC	Caddo, Carter, Comanche, Cotton, Garvin, Grady and 10 more	6 hr
Jul 3, 3:19 AM CDT	Mesoscale Discussion	SPC	Haskell, Latimer, LeFlore, McCurtain, McIntosh, Muskogee and 3 more	2 hr
Jul 3, 3:32 AM CDT	Mesoscale Discussion	SPC	Carter, Cotton, Jefferson, Love, Tillman	118 min
Jul 3, 6:15 AM CDT	Mesoscale Discussion	SPC	Bryan, Choctaw, Love, Marshall	60 min
Jul 3, 4:05 AM CDT	Severe Thunderstorm Watch	SPC	Camp, Clay, Collin, Cooke, Dallas, Delta and 22 more	4 hr

Nearby

Mesoscale Discussions in Texas, 2004 Mesoscale Discussions in Oklahoma, 2004 Every mesoscale discussion in 2004

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.