Alert archive / Texas / Mesoscale Discussions in 2013

Mesoscale Discussion 838

May 28, 20135 counties in Kansas; 7 counties in Oklahoma; 34 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 28, 2013, 2:28 PM CDT for 5 counties in Kansas; 7 counties in Oklahoma; 34 counties in Texas. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued
May 28, 2013, 2:28 PM CDT (19:28 UTC)
Expired
May 28, 2013, 3:30 PM CDT
In force
62 min
Issued by
the Storm Prediction Center
Chance of a watch
60%
All 46 counties

Barber County, KS, Clark County, KS, Comanche County, KS, Kiowa County, KS, Pratt County, KS, Beaver County, OK, Beckham County, OK, Ellis County, OK, Harper County, OK, Roger Mills County, OK, Woods County, OK, Woodward County, OK, Armstrong County, TX, Bailey County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Cochran County, TX, Collingsworth County, TX, Crosby County, TX, Deaf Smith County, TX, Donley County, TX, Floyd County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hansford County, TX, Hemphill County, TX, Hockley County, TX, Hutchinson County, TX, Lamb County, TX, Lipscomb County, TX, Lubbock County, TX, Moore County, TX, Motley County, TX, Ochiltree County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Swisher County, TX, Terry County, TX, Wheeler County, TX, Yoakum County, TX

The radar

The Amarillo radar (KAMA), 108 km from the middle of the area, began a volume at 19:29 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 12:00Z, 7.5 hours before the alert went out and 108 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 12:00Z on 2013-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 759 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, Amarillo Airport, TX at 12:00Z on 2013-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -48 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
759 J/kg
Mixed-layer CIN
-319 J/kg
Mixed-layer LCL
2300 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
-48 m²/s²
0-3 km storm-relative helicity
59 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
May 27, 8:18 PM CDTMesoscale DiscussionSPCClay, Cloud, Dickinson, Ellsworth, Geary, Jewell and 10 more117 min
May 27, 9:07 PM CDTMesoscale DiscussionSPCAtchison, Brown, Clay, Cloud, Dickinson, Doniphan and 21 more53 min
May 27, 9:31 PM CDTSevere Thunderstorm WatchSPCAtchison, Brown, Doniphan, Jackson, Jefferson, Johnson and 3 more7 hr
May 27, 10:23 PM CDTMesoscale DiscussionSPCBrown, Marshall, Nemaha, Pottawatomie, Riley, Washington67 min
May 27, 11:19 PM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Jackson, Jefferson, Leavenworth and 3 more116 min
May 28, 1:37 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Brown, Chase and 32 more113 min
May 28, 2:23 PM CDTTornado WatchSPCAtchison, Barton, Brown, Clay, Cloud, Coffey and 29 more8 hr
May 28, 2:55 PM CDTSevere Thunderstorm WatchSPCBarber, Clark, Comanche, Edwards, Ford, Kiowa and 5 more9 hr
May 28, 3:08 PM CDTMesoscale DiscussionSPCCheyenne, Greeley, Logan, Rawlins, Sheridan, Sherman and 2 more2 hr
May 28, 3:51 PM CDTSevere Thunderstorm WatchSPCCheyenne9 hr
May 28, 5:52 PM CDTMesoscale DiscussionSPCAtchison, Brown, Clay, Dickinson, Doniphan, Geary and 11 more83 min
May 28, 6:05 PM CDTMesoscale DiscussionSPCCheyenne, Sherman115 min
May 27, 7:53 PM CDTMesoscale DiscussionSPCCaddo, Comanche, Greer, Harmon, Jackson, Kiowa and 2 more2 hr

Nearby

Mesoscale Discussions in Texas, 2013Mesoscale Discussions in Oklahoma, 2013Mesoscale Discussions in Kansas, 2013Every mesoscale discussion in 2013

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.