Alert archive / Texas / Mesoscale Discussions in 2008

Mesoscale Discussion 437

March 17, 200845 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 17, 2008, 10:13 AM CDT for 45 counties in Texas. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Mar 17, 2008, 10:13 AM CDT (15:13 UTC)
Expired
Mar 17, 2008, 11:45 AM CDT
In force
92 min
Issued by
the Storm Prediction Center
All 45 counties

Bandera County, TX, Bell County, TX, Bexar County, TX, Blanco County, TX, Bosque County, TX, Brown County, TX, Burnet County, TX, Coleman County, TX, Comal County, TX, Comanche County, TX, Concho County, TX, Coryell County, TX, Dallas County, TX, Eastland County, TX, Edwards County, TX, Ellis County, TX, Erath County, TX, Falls County, TX, Frio County, TX, Gillespie County, TX, Hamilton County, TX, Hays County, TX, Hill County, TX, Hood County, TX, Johnson County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, McLennan County, TX, Medina County, TX, Menard County, TX, Mills County, TX, Palo Pinto County, TX, Parker County, TX, Real County, TX, San Saba County, TX, Somervell County, TX, Tarrant County, TX, Travis County, TX, Uvalde County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 114 km from the middle of the area, began a volume at 15:19 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

Fort Worth, TX (KFWD), launched 12:00Z, 3.2 hours before the alert went out and 178 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 12:00Z on 2008-03-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 185 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 12:00Z on 2008-03-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 338 square meters per square second.1939587897117Sfc1 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
185 J/kg
Mixed-layer CIN
-428 J/kg
Mixed-layer LCL
651 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
338 m²/s²
0-3 km storm-relative helicity
576 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
Mar 16, 11:49 PM CDTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Castro, Childress, Collingsworth and 31 more56 min
Mar 17, 12:04 AM CDTSevere Thunderstorm WatchSPCArmstrong, Bailey, Briscoe, Carson, Castro, Childress and 38 more9 hr
Mar 17, 2:53 AM CDTMesoscale DiscussionSPCArcher, Baylor, Childress, Clay, Collingsworth, Cottle and 18 more2 hr
Mar 17, 3:25 AM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Clay, Cooke, Foard, Hardeman and 9 more8 hr
Mar 17, 5:41 AM CDTMesoscale DiscussionSPCArcher, Baylor, Callahan, Clay, Cooke, Fisher and 20 more94 min
Mar 17, 7:37 AM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Foard, Hardeman, Knox and 2 more83 min
Mar 17, 1:02 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Foard, Hardeman, Haskell and 8 more88 min
Mar 17, 1:30 PM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Brown, Callahan, Clay, Coke and 28 more6 hr
Mar 17, 3:53 PM CDTMesoscale DiscussionSPCArcher, Baylor, Brown, Callahan, Clay, Coleman and 18 more97 min
Mar 17, 5:30 PM CDTMesoscale DiscussionSPCAnderson, Bowie, Camp, Cass, Cherokee, Delta and 21 more30 min
Mar 17, 5:50 PM CDTTornado WatchSPCBowie, Camp, Cass, Delta, Ellis, Fannin and 19 more5 hr
Mar 17, 6:20 PM CDTMesoscale DiscussionSPCArcher, Bandera, Baylor, Brown, Callahan, Clay and 43 more25 min
Mar 17, 6:40 PM CDTTornado WatchSPCBandera, Blanco, Bosque, Brown, Burnet, Callahan and 54 more7 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.