Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 998

May 15, 20035 states

The Storm Prediction Center issued this mesoscale discussion at May 15, 2003, 12:31 PM MDT for 5 states. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued
May 15, 2003, 12:31 PM MDT (18:31 UTC)
Expired
May 15, 2003, 2:30 PM MDT
In force
119 min
Issued by
the Storm Prediction Center
All 26 counties

Baca County, CO, Las Animas County, CO, Morton County, KS, Stanton County, KS, Curry County, NM, Harding County, NM, Quay County, NM, Union County, NM, Cimarron County, OK, Texas County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Dallam County, TX, Deaf Smith County, TX, Hansford County, TX, Hartley County, TX, Hutchinson County, TX, Moore County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Sherman County, TX, Swisher County, TX

The radar

The Amarillo radar (KAMA), 152 km from the middle of the area, began a volume at 18:33 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 6.5 hours before the alert went out and 152 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-pSkew-T log-p diagram, Amarillo Airport, TX at 12:00Z on 2003-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 95 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Amarillo Airport, TX at 12:00Z on 2003-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 88 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
95 J/kg
Mixed-layer CIN
-275 J/kg
Mixed-layer LCL
1781 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
122 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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.

IssuedProductOfficeCountiesLasted
May 15, 12:55 PM MDTTornado WatchSPCBaca, Bent, Crowley, Kiowa, Otero, Prowers6 hr
May 15, 2:41 PM MDTMesoscale DiscussionSPCBaca, Bent, Las Animas, Otero, Prowers94 min
May 15, 3:00 PM MDTTornado WatchSPCAdams, Arapahoe, Cheyenne, Elbert, Kit Carson, Lincoln and 1 more5 hr
May 15, 5:50 PM MDTTornado WatchSPCBaca5 hr
May 15, 5:47 PM MDTMesoscale DiscussionSPCClark, Comanche58 min
May 14, 6:36 PM MDTMesoscale DiscussionSPCAtoka, Choctaw, McCurtain, Pushmataha114 min
May 15, 5:25 PM MDTTornado WatchSPCJackson, Tillman6 hr
May 14, 8:20 PM MDTMesoscale DiscussionSPCCass, Harrison, Marion115 min
May 14, 10:20 PM MDTMesoscale DiscussionSPCBell, Bosque, Coryell, Ellis, Falls, Freestone and 5 more115 min
May 14, 10:35 PM MDTSevere Thunderstorm WatchSPCCamp, Cass, Cherokee, Franklin, Gregg, Harrison and 8 more5 hr
May 14, 10:45 PM MDTSevere Thunderstorm WatchSPCAnderson, Bosque, Collin, Dallas, Delta, Denton and 16 more5 hr
May 15, 1:10 AM MDTMesoscale DiscussionSPCAnderson, Collin, Dallas, Denton, Ellis, Henderson and 13 more2 hr
May 15, 1:27 AM MDTMesoscale DiscussionSPCGregg, Harrison, Marion, Panola, Rusk, Shelby2 hr
May 15, 3:05 PM MDTTornado WatchSPCBorden, Briscoe, Castro, Childress, Cottle, Crosby and 20 more6 hr
May 15, 4:15 PM MDTMesoscale DiscussionSPCFrio, Kinney, Maverick, Uvalde, Zavala2 hr
May 15, 4:49 PM MDTMesoscale DiscussionSPCBaylor, Coke, Cottle, Fisher, Foard, Hardeman and 17 more116 min

Nearby

Mesoscale Discussions in Texas, 2003Mesoscale Discussions in New Mexico, 2003Mesoscale Discussions in Colorado, 2003Every 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.