Alert archive / Oklahoma / Mesoscale Discussions in 2005

Mesoscale Discussion 493

April 5, 200519 counties in Oklahoma; 19 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 5, 2005, 5:14 PM CDT for 19 counties in Oklahoma; 19 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 5, 2005, 5:14 PM CDT (22:14 UTC)
Expired: Apr 5, 2005, 7:15 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 38 counties

Adair County, OK, Atoka County, OK, Bryan County, OK, Cherokee County, OK, Choctaw County, OK, Delaware County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, Mayes County, OK, McCurtain County, OK, McIntosh County, OK, Muskogee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pushmataha County, OK, Rogers County, OK, Sequoyah County, OK, Wagoner County, OK, Bosque County, TX, Collin County, TX, Dallas County, TX, Delta County, TX, Ellis County, TX, Fannin County, TX, Franklin County, TX, Hill County, TX, Hopkins County, TX, Hunt County, TX, Kaufman County, TX, Lamar County, TX, McLennan County, TX, Navarro County, TX, Rains County, TX, Red River County, TX, Rockwall County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Norman radar (KTLX), 187 km from the middle of the area, began a volume at 22:14 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.

Severe Thunderstorm Watch 127Apr 5, 8:25 PM CDT

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 10.2 hours before the alert went out and 172 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: 479 J/kg
Mixed-layer CIN: -425 J/kg
Mixed-layer LCL: 626 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 285 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Apr 5, 1:58 PM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Coal, Creek, Hughes, McIntosh and 10 more	92 min
Apr 5, 2:25 PM CDT	Mesoscale Discussion	SPC	Custer, Dewey, Ellis, Harper, Washita, Woods and 1 more	2 hr
Apr 5, 2:30 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Cherokee, Craig, Creek, Delaware, McIntosh and 12 more	7 hr
Apr 5, 2:30 PM CDT	Tornado Watch	SPC	Atoka, Bryan, Choctaw, Coal, Haskell, Hughes and 9 more	7 hr
Apr 5, 3:55 PM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Craig, Creek, Delaware, McIntosh and 13 more	95 min
Apr 5, 6:50 PM CDT	Mesoscale Discussion	SPC	Craig, Delaware, Mayes, Nowata, Ottawa, Washington	55 min
Apr 5, 2:54 PM CDT	Mesoscale Discussion	SPC	Bell, Blanco, Burnet, Coryell, Gillespie, Kendall and 6 more	96 min

Nearby

Mesoscale Discussions in Oklahoma, 2005 Mesoscale Discussions in Texas, 2005 Every mesoscale discussion in 2005

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.