Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 838

May 29, 2015Curry County, Lea County, Roosevelt County, New Mexico; 41 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 29, 2015, 6:03 PM MDT for Curry County, Lea County, Roosevelt County, New Mexico; 41 counties in Texas. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
May 29, 2015, 6:03 PM MDT (00:03 UTC)
Expired
May 29, 2015, 8:00 PM MDT
In force
117 min
Issued by
the Storm Prediction Center
All 44 counties

Curry County, NM, Lea County, NM, Roosevelt County, NM, Andrews County, TX, Bailey County, TX, Borden County, TX, Briscoe County, TX, Castro County, TX, Cochran County, TX, Coke County, TX, Crosby County, TX, Dawson County, TX, Deaf Smith County, TX, Dickens County, TX, Ector County, TX, Fisher County, TX, Floyd County, TX, Gaines County, TX, Garza County, TX, Glasscock County, TX, Hale County, TX, Hockley County, TX, Howard County, TX, Jones County, TX, Kent County, TX, King County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Martin County, TX, Midland County, TX, Mitchell County, TX, Motley County, TX, Nolan County, TX, Parmer County, TX, Runnels County, TX, Scurry County, TX, Sterling County, TX, Stonewall County, TX, Swisher County, TX, Taylor County, TX, Terry County, TX, Tom Green County, TX, Yoakum County, TX

The radar

The Lubbock radar (KLBB), 71 km from the middle of the area, began a volume at 00:04 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

Midland Regional, TX (KMAF), launched 00:00Z, 0.1 hours before the alert went out and 132 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, Midland Regional, TX at 00:00Z on 2015-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1700 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, Midland Regional, TX at 00:00Z on 2015-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -25 square meters per square second.193958Sfc1 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
1700 J/kg
Mixed-layer CIN
-107 J/kg
Mixed-layer LCL
1643 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-25 m²/s²
0-3 km storm-relative helicity
88 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.5

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 29, 6:21 PM MDTSevere Thunderstorm WatchSPCLea7 hr
May 29, 11:58 PM MDTMesoscale DiscussionSPCBrown, Callahan, Coleman, Comanche, Eastland, Erath and 12 more92 min
May 30, 12:35 AM MDTSevere Thunderstorm WatchSPCBell, Bosque, Brown, Callahan, Coke, Coleman and 37 more6 hr
May 30, 5:20 AM MDTMesoscale DiscussionSPCAnderson, Camp, Cherokee, Ellis, Freestone, Gregg and 14 more85 min
May 30, 9:14 AM MDTMesoscale DiscussionSPCPanola, Shelby91 min
May 30, 11:10 AM MDTMesoscale DiscussionSPCDimmit, Duval, Kinney, La Salle, Maverick, Webb and 2 more65 min
May 30, 11:32 AM MDTSevere Thunderstorm WatchSPCDimmit, Frio, Kinney, La Salle, Maverick, Medina and 3 more6 hr
May 30, 4:01 PM MDTMesoscale DiscussionSPCAtascosa, Bee, DeWitt, Duval, Goliad, Jim Hogg and 7 more59 min

Nearby

Mesoscale Discussions in Texas, 2015Mesoscale Discussions in New Mexico, 2015Every mesoscale discussion in 2015

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.