Alert archive / Texas / Mesoscale Discussions in 2005

Mesoscale Discussion 848

May 12, 20054 counties in Oklahoma; 18 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 12, 2005, 7:56 PM CDT for 4 counties in Oklahoma; 18 counties in Texas. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued
May 12, 2005, 7:56 PM CDT (00:56 UTC)
Expired
May 12, 2005, 9:00 PM CDT
In force
64 min
Issued by
the Storm Prediction Center
All 22 counties

Beckham County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Briscoe County, TX, Castro County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Foard County, TX, Hale County, TX, Hall County, TX, Hardeman County, TX, Hockley County, TX, Lubbock County, TX, Motley County, TX, Swisher County, TX, Terry County, TX

The radar

The Lubbock radar (KLBB), 101 km from the middle of the area, began a volume at 00:58 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 0.9 hours before the alert went out and 109 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, Amarillo Airport, TX at 00:00Z on 2005-05-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 246 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Amarillo Airport, TX at 00:00Z on 2005-05-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 142 square meters per square second.19395878Sfc1 km3 km6 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
246 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
610 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
142 m²/s²
0-3 km storm-relative helicity
174 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

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 12, 8:40 PM CDTTornado WatchSPCGreer, Harmon, Jackson5 hr
May 12, 9:35 PM CDTMesoscale DiscussionSPCAlfalfa, Beckham, Blaine, Custer, Dewey, Ellis and 10 more85 min
May 12, 10:48 PM CDTMesoscale DiscussionSPCCaddo, Comanche, Cotton, Garvin, Grady, Jefferson and 3 more57 min
May 12, 11:35 PM CDTSevere Thunderstorm WatchSPCAlfalfa, Blaine, Caddo, Canadian, Comanche, Cotton and 17 more5 hr
May 13, 1:04 AM CDTMesoscale DiscussionSPCCaddo, Canadian, Comanche, Cotton, Garfield, Grady and 5 more86 min
May 13, 4:04 AM CDTMesoscale DiscussionSPCComanche, Cotton, Stephens, Tillman56 min
May 13, 1:52 PM CDTMesoscale DiscussionSPCHarmon, Jackson83 min
May 13, 2:10 PM CDTTornado WatchSPCBeckham, Blaine, Caddo, Comanche, Cotton, Custer and 8 more7 hr
May 13, 3:50 PM CDTMesoscale DiscussionSPCAlfalfa, Craig, Garfield, Grant, Harper, Kay and 8 more85 min
May 13, 5:05 PM CDTSevere Thunderstorm WatchSPCAlfalfa, Blaine, Craig, Custer, Delaware, Dewey and 21 more7 hr
May 13, 5:56 PM CDTMesoscale DiscussionSPCBeckham, Blaine, Caddo, Comanche, Cotton, Custer and 8 more64 min
May 13, 6:25 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Custer, Dewey, Garfield, Grant and 12 more65 min
May 13, 6:45 PM CDTTornado WatchSPCBlaine, Caddo, Canadian, Cleveland, Comanche, Cotton and 20 more7 hr
May 13, 1:12 AM CDTMesoscale DiscussionSPCChildress, Cottle, Crosby, Floyd, Hale, Hall and 2 more63 min
May 13, 1:30 AM CDTSevere Thunderstorm WatchSPCBaylor, Cottle, Crosby, Dickens, Floyd, Foard and 8 more5 hr
May 13, 2:13 PM CDTMesoscale DiscussionSPCBrewster, Crockett, Irion, Terrell2 hr
May 13, 6:08 PM CDTMesoscale DiscussionSPCCoke, Crane, Fisher, Glasscock, Howard, Irion and 11 more67 min
May 13, 6:25 PM CDTTornado WatchSPCBrown, Callahan, Coke, Coleman, Concho, Eastland and 16 more7 hr

Nearby

Mesoscale Discussions in Texas, 2005Mesoscale Discussions in Oklahoma, 2005Every mesoscale discussion in 2005

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.