Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 1778

July 11, 20035 states

The Storm Prediction Center issued this mesoscale discussion at Jul 11, 2003, 3:38 PM MDT for 5 states. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
Jul 11, 2003, 3:38 PM MDT (21:38 UTC)
Expired
Jul 11, 2003, 5:15 PM MDT
In force
97 min
Issued by
the Storm Prediction Center
All 54 counties

Baca County, CO, Grant County, KS, Haskell County, KS, Meade County, KS, Morton County, KS, Seward County, KS, Stanton County, KS, Stevens County, KS, Colfax County, NM, Curry County, NM, De Baca County, NM, Guadalupe County, NM, Harding County, NM, Mora County, NM, Quay County, NM, Roosevelt County, NM, San Miguel County, NM, Union County, NM, Beaver County, OK, Beckham County, OK, Cimarron County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Roger Mills County, OK, Texas County, OK, Armstrong County, TX, Bailey County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Collingsworth County, TX, Dallam County, TX, Deaf Smith County, TX, Donley County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hansford County, TX, Hartley County, TX, Hemphill County, TX, Hutchinson County, TX, Lamb County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Swisher County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 119 km from the middle of the area, began a volume at 21:38 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, 9.6 hours before the alert went out and 120 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 2003-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2003-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3034 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
205 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.

IssuedProductOfficeCountiesLasted
Jul 11, 1:01 PM MDTMesoscale DiscussionSPCAlamosa, Conejos, Costilla, Custer, Huerfano, Las Animas and 1 more119 min
Jul 11, 2:16 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Elbert, Kit Carson, Logan, Morgan and 3 more119 min
Jul 11, 5:50 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Cheyenne, Denver, Douglas, Elbert and 7 more85 min
Jul 11, 1:41 PM MDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Butler, Chase, Coffey and 23 more2 hr
Jul 11, 2:45 PM MDTSevere Thunderstorm WatchSPCAllen, Anderson, Bourbon, Chase, Cherokee, Clay and 24 more6 hr
Jul 11, 11:37 AM MDTMesoscale DiscussionSPCDoña Ana, Grant, Hidalgo, Luna, Otero, Sierra113 min
Jul 11, 12:35 PM MDTSevere Thunderstorm WatchSPCDoña Ana, Grant, Hidalgo, Lincoln, Luna, Otero and 1 more5 hr
Jul 11, 4:25 PM MDTSevere Thunderstorm WatchSPCCurry, De Baca, Quay, Roosevelt6 hr
Jul 11, 4:33 PM MDTMesoscale DiscussionSPCDoña Ana, Grant, Hidalgo, Luna, Otero, Sierra87 min
Jul 11, 10:46 AM MDTMesoscale DiscussionSPCAngelina, Austin, Brazos, Chambers, Fort Bend, Grimes and 15 more119 min
Jul 11, 1:00 PM MDTSevere Thunderstorm WatchSPCBastrop, Bell, Brazos, Burleson, Burnet, Caldwell and 14 more5 hr
Jul 11, 5:15 PM MDTMesoscale DiscussionSPCBastrop, Bell, Brazos, Burleson, Burnet, Caldwell and 14 more60 min

Nearby

Mesoscale Discussions in Texas, 2003Mesoscale Discussions in New Mexico, 2003Mesoscale Discussions in Oklahoma, 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.