Alert archive / Texas / Mesoscale Discussions in 2008

Mesoscale Discussion 451

March 18, 200815 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 18, 2008, 1:43 AM CDT for 15 counties in Texas. It was in force for 32 min.

The area

The outline as issued.

The facts

Issued
Mar 18, 2008, 1:43 AM CDT (06:43 UTC)
Expired
Mar 18, 2008, 2:15 AM CDT
In force
32 min
Issued by
the Storm Prediction Center

Counties Brown County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crockett County, TX, Eastland County, TX, Irion County, TX, Menard County, TX, Runnels County, TX, Schleicher County, TX, Sutton County, TX, Taylor County, TX, Tom Green County, TX, Val Verde County, TX

The radar

The San Angelo radar (KSJT), 82 km from the middle of the area, began a volume at 06:46 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 (KDRT), launched 00:00Z, 6.7 hours before the alert went out and 147 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 2008-03-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 170 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 2008-03-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 square meters per square second.1939587897117136Sfc1 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
170 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
3256 m above ground
0-6 km bulk shear
81 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
257 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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
Mar 17, 7:09 PM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Clay, Wichita, Wilbarger7 hr
Mar 17, 9:17 PM CDTMesoscale DiscussionSPCBandera, Blanco, Bosque, Brown, Burnet, Callahan and 53 more58 min
Mar 17, 10:21 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Wichita, Wilbarger54 min
Mar 17, 11:06 PM CDTMesoscale DiscussionSPCBandera, Blanco, Bosque, Brown, Burnet, Callahan and 53 more54 min
Mar 18, 1:13 AM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Foard, Haskell, Jack and 8 more62 min
Mar 18, 1:32 AM CDTMesoscale DiscussionSPCBrown, Callahan, Coke, Coleman, Concho, Crockett and 9 more58 min
Mar 18, 1:52 AM CDTTornado WatchSPCBandera, Blanco, Bosque, Brown, Burnet, Callahan and 34 more7 hr
Mar 18, 4:57 AM CDTMesoscale DiscussionSPCBandera, Blanco, Burnet, Coryell, Gillespie, Hamilton and 7 more93 min
Mar 18, 7:22 AM CDTMesoscale DiscussionSPCAnderson, Austin, Bastrop, Bell, Brazoria, Brazos and 40 more113 min
Mar 18, 7:50 AM CDTMesoscale DiscussionSPCBandera, Bosque, Brown, Burnet, Coleman, Comanche and 19 more55 min
Mar 18, 9:26 AM CDTMesoscale DiscussionSPCAnderson, Bowie, Camp, Cass, Cherokee, Delta and 25 more2 hr
Mar 18, 10:16 AM CDTTornado Watch PDSSPCBowie, Camp, Cass, Delta, Fannin, Franklin and 17 more7 hr
Mar 18, 10:59 AM CDTTornado Watch PDSSPCAnderson, Angelina, Austin, Bastrop, Bell, Brazoria and 45 more8 hr
Mar 18, 12:10 PM CDTMesoscale DiscussionSPCBowie, Camp, Cass, Delta, Fannin, Franklin and 13 more2 hr
Mar 18, 1:19 PM CDTMesoscale DiscussionSPCAnderson, Austin, Bastrop, Bell, Brazos, Burleson and 37 more116 min
Mar 18, 1:51 PM CDTMesoscale DiscussionSPCBowie, Camp, Collin, Dallas, Delta, Ellis and 15 more3 hr
Mar 18, 3:54 PM CDTMesoscale DiscussionSPCAnderson, Angelina, Austin, Bowie, Brazos, Burleson and 36 more2 hr
Mar 18, 5:19 PM CDTTornado WatchSPCBowie, Camp, Cass, Franklin, Gregg, Harrison and 12 more11 hr
Mar 18, 6:19 PM CDTMesoscale DiscussionSPCAnderson, Angelina, Chambers, Cherokee, Hardin, Harrison and 16 more56 min
Mar 18, 6:47 PM CDTTornado WatchSPCAnderson, Angelina, Chambers, Cherokee, Galveston, Hardin and 12 more9 hr

Nearby

Mesoscale Discussions in Texas, 2008Every mesoscale discussion in 2008

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.