Alert archive / Texas / Mesoscale Discussions in 2013

Mesoscale Discussion 874

May 30, 20137 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 30, 2013, 3:34 AM CDT for 7 counties in Texas. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
May 30, 2013, 3:34 AM CDT (08:34 UTC)
Expired
May 30, 2013, 5:30 AM CDT
In force
116 min
Issued by
the Storm Prediction Center
Chance of a watch
60%

Counties Brown County, TX, Callahan County, TX, Coleman County, TX, Comanche County, TX, Eastland County, TX, Erath County, TX, Runnels County, TX

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 8.6 hours before the alert went out and 185 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 2013-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 708 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, Fort Worth, TX at 00:00Z on 2013-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 306 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
708 J/kg
Mixed-layer CIN
-87 J/kg
Mixed-layer LCL
917 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
306 m²/s²
0-3 km storm-relative helicity
396 m²/s²
Significant tornado parameter
1.2
Supercell composite
8.8

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
May 29, 7:36 PM CDTMesoscale DiscussionSPCCollingsworth, Gray, Hansford, Hemphill, Hutchinson, Lipscomb and 3 more84 min
May 30, 12:20 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Montague, Wichita, Wilbarger2 hr
May 30, 2:51 PM CDTTornado WatchSPCArcher, Baylor, Clay, Cooke, Fannin, Grayson and 12 more6 hr
May 30, 5:52 PM CDTMesoscale DiscussionSPCArcher, Clay, Cooke, Jack, Montague, Palo Pinto and 7 more113 min

Nearby

Mesoscale Discussions in Texas, 2013Every mesoscale discussion in 2013

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.