Alert archive / Texas / Mesoscale Discussions in 2005

Mesoscale Discussion 495

April 5, 200516 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 5, 2005, 7:10 PM CDT for 16 counties in Texas. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued
Apr 5, 2005, 7:10 PM CDT (00:10 UTC)
Expired
Apr 5, 2005, 8:15 PM CDT
In force
65 min
Issued by
the Storm Prediction Center

Counties Bell County, TX, Brazos County, TX, Burleson County, TX, Falls County, TX, Grimes County, TX, Houston County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, Madison County, TX, Milam County, TX, Robertson County, TX, Trinity County, TX, Walker County, TX, Washington County, TX, Williamson 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

Fort Worth, TX (KFWD), launched 00:00Z, 0.2 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, Fort Worth, TX at 00:00Z on 2005-04-06Temperature 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 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 00:00Z on 2005-04-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -59 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
3686 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
-59 m²/s²
0-3 km storm-relative helicity
64 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
Apr 5, 8:25 PM CDTSevere Thunderstorm WatchSPCAnderson, Austin, Bastrop, Bell, Bowie, Brazos and 43 more8 hr
Apr 5, 10:40 PM CDTMesoscale DiscussionSPCJasper, Newton, Orange, Sabine2 hr
Apr 6, 12:15 AM CDTMesoscale DiscussionSPCAransas, Bee, Brazoria, Calhoun, Chambers, Colorado and 20 more90 min

Nearby

Mesoscale Discussions in Texas, 2005Every mesoscale discussion in 2005

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.