Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 1550

July 6, 20048 counties in New Mexico; 37 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jul 6, 2004, 7:02 PM MDT for 8 counties in New Mexico; 37 counties in Texas. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Jul 6, 2004, 7:02 PM MDT (01:02 UTC)
Expired
Jul 6, 2004, 8:30 PM MDT
In force
88 min
Issued by
the Storm Prediction Center
All 45 counties

Chaves County, NM, Curry County, NM, De Baca County, NM, Eddy County, NM, Guadalupe County, NM, Lea County, NM, Quay County, NM, Roosevelt County, NM, Andrews County, TX, Armstrong County, TX, Bailey County, TX, Borden County, TX, Briscoe County, TX, Castro County, TX, Cochran County, TX, Coke County, TX, Crosby County, TX, Dawson County, TX, Deaf Smith County, TX, Dickens County, TX, Ector County, TX, Floyd County, TX, Gaines County, TX, Garza County, TX, Glasscock County, TX, Hale County, TX, Hockley County, TX, Howard County, TX, Kent County, TX, Lamb County, TX, Loving County, TX, Lubbock County, TX, Lynn County, TX, Martin County, TX, Midland County, TX, Mitchell County, TX, Motley County, TX, Parmer County, TX, Randall County, TX, Scurry County, TX, Sterling County, TX, Swisher County, TX, Terry County, TX, Winkler County, TX, Yoakum County, TX

The radar

The Lubbock radar (KLBB), 100 km from the middle of the area, began a volume at 01:05 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

Midland Regional, TX (KMAF), launched 00:00Z, 1.0 hours before the alert went out and 176 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, Midland Regional, TX at 00:00Z on 2004-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2121 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, Midland Regional, TX at 00:00Z on 2004-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 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
2121 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
2453 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
89 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

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
Jul 6, 8:45 PM MDTSevere Thunderstorm WatchSPCBailey, Briscoe, Castro, Childress, Cochran, Cottle and 18 more6 hr
Jul 6, 10:48 PM MDTMesoscale DiscussionSPCArcher, Baylor, Childress, Clay, Foard, Hardeman and 4 more87 min
Jul 6, 11:35 PM MDTSevere Thunderstorm WatchSPCArcher, Baylor, Callahan, Clay, Coke, Coleman and 29 more5 hr
Jul 7, 12:55 AM MDTMesoscale DiscussionSPCArcher, Baylor, Briscoe, Callahan, Childress, Clay and 40 more95 min
Jul 7, 1:31 PM MDTMesoscale DiscussionSPCAnderson, Bell, Bosque, Brazos, Burleson, Burnet and 34 more119 min

Nearby

Mesoscale Discussions in Texas, 2004Mesoscale Discussions in New Mexico, 2004Every 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.