Alert archive / Texas / Mesoscale Discussions in 2018

Mesoscale Discussion 1573

October 13, 201822 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Oct 13, 2018, 1:40 AM CDT for 22 counties in Texas. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued
Oct 13, 2018, 1:40 AM CDT (06:40 UTC)
Expired
Oct 13, 2018, 2:45 AM CDT
In force
65 min
Issued by
the Storm Prediction Center
All 22 counties

Concho County, TX, Crane County, TX, Crockett County, TX, Ector County, TX, Gillespie County, TX, Glasscock County, TX, Irion County, TX, Kimble County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Midland County, TX, Pecos County, TX, Reagan County, TX, San Saba County, TX, Schleicher County, TX, Sterling County, TX, Sutton County, TX, Tom Green County, TX, Upton County, TX, Ward County, TX

The radar

The San Angelo radar (KSJT), 63 km from the middle of the area, began a volume at 06:43 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Del Rio, TX (KDLF), launched 00:00Z, 6.7 hours before the alert went out and 169 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, Del Rio, TX at 00:00Z on 2018-10-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1723 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, Del Rio, TX at 00:00Z on 2018-10-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 66 square meters per square second.19395878Sfc1 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
1723 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
875 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.7
Supercell composite
3.7

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 12, 7:22 PM CDTMesoscale DiscussionSPCCrane, Crockett, Ector, Glasscock, Irion, Jeff Davis and 9 more2 hr
Oct 12, 8:14 PM CDTSevere Thunderstorm WatchSPCAndrews, Brewster, Crane, Culberson, Ector, Glasscock and 13 more8 hr
Oct 12, 10:58 PM CDTMesoscale DiscussionSPCCrane, Ector, Glasscock, Loving, Midland, Pecos and 6 more2 hr
Oct 13, 1:59 AM CDTSevere Thunderstorm WatchSPCConcho, Crockett, Irion, Kimble, McCulloch, Mason and 5 more6 hr
Oct 13, 7:40 AM CDTTornado WatchSPCBrown, Coleman, Concho, McCulloch, Menard, Runnels and 3 more4 hr
Oct 13, 7:47 AM CDTMesoscale DiscussionSPCBell, Bosque, Brown, Burnet, Coleman, Comanche and 13 more118 min
Oct 13, 9:54 AM CDTTornado WatchSPCAnderson, Bell, Bosque, Burnet, Comanche, Coryell and 22 more9 hr
Oct 13, 11:04 AM CDTMesoscale DiscussionSPCAnderson, Bell, Bosque, Brown, Burnet, Comanche and 27 more116 min
Oct 13, 1:56 PM CDTMesoscale DiscussionSPCAnderson, Bell, Brazos, Burleson, Burnet, Cherokee and 23 more2 hr
Oct 13, 3:06 PM CDTTornado WatchSPCAngelina, Cherokee, Gregg, Harrison, Houston, Madison and 7 more5 hr
Oct 13, 5:34 PM CDTMesoscale DiscussionSPCAnderson, Bell, Falls, Freestone, Leon, Milam and 1 more56 min
Oct 13, 6:41 PM CDTMesoscale DiscussionSPCAngelina, Harrison, Houston, Madison, Nacogdoches, Panola and 4 more94 min

Nearby

Mesoscale Discussions in Texas, 2018Every mesoscale discussion in 2018

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.