Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 530

April 22, 200319 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2003, 9:18 AM CDT for 19 counties in Texas. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Apr 22, 2003, 9:18 AM CDT (14:18 UTC)
Expired
Apr 22, 2003, 11:15 AM CDT
In force
117 min
Issued by
the Storm Prediction Center

Counties Bell County, TX, Bosque County, TX, Comanche County, TX, Coryell County, TX, Eastland County, TX, Erath County, TX, Hamilton County, TX, Haskell County, TX, Hood County, TX, Jones County, TX, King County, TX, Knox County, TX, McLennan County, TX, Palo Pinto County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Stonewall County, TX, Throckmorton County, TX

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 2.3 hours before the alert went out and 164 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, Fort Worth, TX at 12:00Z on 2003-04-22Temperature 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, Fort Worth, TX at 12:00Z on 2003-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1954 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
165 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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
Apr 22, 11:29 AM CDTMesoscale DiscussionSPCAustin, Brazoria, Chambers, Fort Bend, Grimes, Harris and 3 more61 min
Apr 22, 3:41 PM CDTMesoscale DiscussionSPCAndrews, Cochran, Crane, Crockett, Dawson, Ector and 16 more94 min
Apr 22, 4:55 PM CDTTornado WatchSPCBorden, Cochran, Coke, Concho, Crockett, Crosby and 32 more5 hr

Nearby

Mesoscale Discussions in Texas, 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.