Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 2438

October 9, 2003Cameron Parish, Vermilion Parish, Louisiana; Chambers County, Galveston County, Jefferson County, Texas

The Storm Prediction Center issued this mesoscale discussion at Oct 9, 2003, 12:19 PM CDT for Cameron Parish, Vermilion Parish, Louisiana; Chambers County, Galveston County, Jefferson County, Texas. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
Oct 9, 2003, 12:19 PM CDT (17:19 UTC)
Expired
Oct 9, 2003, 2:15 PM CDT
In force
116 min
Issued by
the Storm Prediction Center

Counties Cameron Parish, LA, Vermilion Parish, LA, Chambers County, TX, Galveston County, TX, Jefferson County, TX

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 5.3 hours before the alert went out and 79 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, Lake Charles Mun, LA at 12:00Z on 2003-10-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 49 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, Lake Charles Mun, LA at 12:00Z on 2003-10-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 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
49 J/kg
Mixed-layer CIN
-61 J/kg
Mixed-layer LCL
805 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
122 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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
Oct 9, 5:38 PM CDTMesoscale DiscussionSPCChambers, Galveston, Jefferson97 min

Nearby

Mesoscale Discussions in Texas, 2003Mesoscale Discussions in Louisiana, 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.