Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 1876

October 22, 20159 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Oct 22, 2015, 8:15 PM CDT for 9 counties in Texas. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
Oct 22, 2015, 8:15 PM CDT (01:15 UTC)
Expired
Oct 22, 2015, 9:45 PM CDT
In force
90 min
Issued by
the Storm Prediction Center

Counties Concho County, TX, Crockett County, TX, Edwards County, TX, Kimble County, TX, Menard County, TX, Schleicher County, TX, Sutton County, TX, Tom Green County, TX, Val Verde County, TX

The radar

The San Angelo radar (KSJT), 122 km from the middle of the area, began a volume at 01:17 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 1.3 hours before the alert went out and 436 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 2015-10-23Temperature 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 00:00Z on 2015-10-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
458 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
305 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

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 23, 2:31 PM CDTMesoscale DiscussionSPCCallahan, Coke, Coleman, Eastland, Erath, Glasscock and 18 more119 min
Oct 23, 2:32 PM CDTMesoscale DiscussionSPCBrown, Coleman, Comanche, Concho, Crockett, Edwards and 15 more118 min

Nearby

Mesoscale Discussions in Texas, 2015Every mesoscale discussion in 2015

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; radar from the NEXRAD Level II archive.