Alert archive / Oklahoma / Mesoscale Discussions in 2003

Mesoscale Discussion 665

May 1, 20035 counties in Arkansas; 10 counties in Oklahoma; Bowie County, Lamar County, Red River County, Texas

The Storm Prediction Center issued this mesoscale discussion at May 1, 2003, 2:13 PM CDT for 5 counties in Arkansas; 10 counties in Oklahoma; Bowie County, Lamar County, Red River County, Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: May 1, 2003, 2:13 PM CDT (19:13 UTC)
Expired: May 1, 2003, 4:45 PM CDT
In force: 3 hr
Issued by: the Storm Prediction Center

Counties Howard County, AR, Little River County, AR, Polk County, AR, Scott County, AR, Sevier County, AR, Choctaw County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, McCurtain County, OK, McIntosh County, OK, Muskogee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pushmataha County, OK, Bowie County, TX, Lamar County, TX, Red River County, TX

The radar

The Western Arkansas radar (KSRX), 114 km from the middle of the area, began a volume at 19:17 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.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 7.2 hours before the alert went out and 213 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: 1326 J/kg
Mixed-layer CIN: -345 J/kg
Mixed-layer LCL: 1850 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 248 m²/s²
0-3 km storm-relative helicity: 274 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 1, 7:51 AM CDT	Mesoscale Discussion	SPC	Baxter, Clay, Fulton, Izard, Randolph, Searcy and 1 more	114 min
May 1, 9:35 AM CDT	Severe Thunderstorm Watch	SPC	Clay, Craighead, Greene	5 hr
May 1, 11:23 AM CDT	Mesoscale Discussion	SPC	Crittenden, Cross, Mississippi, St. Francis	2 hr
May 1, 2:55 PM CDT	Tornado Watch	SPC	Little River	5 hr
May 1, 3:45 PM CDT	Tornado Watch	SPC	Benton, Carroll, Crawford, Franklin, Howard, Johnson and 9 more	5 hr
May 1, 6:10 PM CDT	Mesoscale Discussion	SPC	Arkansas, Dallas, Hempstead, Jefferson, Lee, Little River and 3 more	95 min
May 1, 6:58 PM CDT	Mesoscale Discussion	SPC	Benton, Carroll, Crawford, Franklin, Hempstead, Howard and 10 more	92 min
Apr 30, 7:30 PM CDT	Severe Thunderstorm Watch	SPC	Garfield, Grant, Kay, Logan, Noble, Osage and 2 more	6 hr
Apr 30, 8:17 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Caddo, Canadian, Comanche, Cotton and 14 more	88 min
Apr 30, 9:52 PM CDT	Mesoscale Discussion	SPC	Garfield, Grant, Kay, Logan, Noble, Osage and 2 more	83 min
Apr 30, 11:47 PM CDT	Mesoscale Discussion	SPC	Garfield, Grant, Kay, Logan, Noble, Osage and 2 more	118 min
May 1, 12:10 AM CDT	Severe Thunderstorm Watch	SPC	Craig, Garfield, Grant, Kay, Noble, Nowata and 4 more	5 hr
May 1, 2:27 AM CDT	Mesoscale Discussion	SPC	Craig, Delaware, Mayes, Nowata, Osage, Ottawa and 2 more	2 hr
May 1, 10:55 AM CDT	Mesoscale Discussion	SPC	Bryan, Coal, Johnston, Love, Marshall	2 hr
May 1, 2:33 PM CDT	Mesoscale Discussion	SPC	Bosque, Brown, Burnet, Camp, Comanche, Concho and 34 more	117 min

Nearby

Mesoscale Discussions in Oklahoma, 2003 Mesoscale Discussions in Arkansas, 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.