Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 2280

September 30, 20046 counties in New Mexico; 10 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Sep 30, 2004, 12:23 PM MDT for 6 counties in New Mexico; 10 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Sep 30, 2004, 12:23 PM MDT (18:23 UTC)
Expired
Sep 30, 2004, 2:30 PM MDT
In force
2 hr
Issued by
the Storm Prediction Center

Counties Chaves County, NM, Curry County, NM, Eddy County, NM, Lea County, NM, Quay County, NM, Roosevelt County, NM, Bailey County, TX, Castro County, TX, Cochran County, TX, Culberson County, TX, Deaf Smith County, TX, Lamb County, TX, Loving County, TX, Oldham County, TX, Parmer County, TX, Yoakum County, TX

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 12:00Z, 6.4 hours before the alert went out and 215 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 12:00Z on 2004-09-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 428 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 12:00Z on 2004-09-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 235 square meters per square second.19395878Sfc1 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
428 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
732 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
235 m²/s²
0-3 km storm-relative helicity
250 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.3

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
Sep 30, 12:55 PM MDTSevere Thunderstorm WatchSPCChaves, Curry, De Baca, Eddy, Guadalupe, Lea and 2 more6 hr
Sep 30, 3:52 PM MDTMesoscale DiscussionSPCChildress, Collingsworth, Cottle, Dickens, Donley, Fisher and 18 more83 min
Sep 30, 4:56 PM MDTMesoscale DiscussionSPCJeff Davis, Loving, Pecos, Reeves, Ward, Winkler94 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.