Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 559

May 9, 20155 counties in New Mexico; 20 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 9, 2015, 1:34 AM MDT for 5 counties in New Mexico; 20 counties in Texas. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
May 9, 2015, 1:34 AM MDT (07:34 UTC)
Expired
May 9, 2015, 3:30 AM MDT
In force
116 min
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 25 counties

Curry County, NM, Harding County, NM, Lea County, NM, Quay County, NM, Roosevelt County, NM, Andrews County, TX, Bailey County, TX, Castro County, TX, Cochran County, TX, Dallam County, TX, Dawson County, TX, Deaf Smith County, TX, Gaines County, TX, Hale County, TX, Hartley County, TX, Hockley County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Terry County, TX, Yoakum County, TX

The radar

The Cannon AFB radar (KFDX), 97 km from the middle of the area, began a volume at 07:35 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, 7.6 hours before the alert went out and 176 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 2015-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 20 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 00:00Z on 2015-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
20 J/kg
Mixed-layer CIN
-217 J/kg
Mixed-layer LCL
978 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
8 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 8, 6:55 PM MDTMesoscale DiscussionSPCColfax, Harding, Union2 hr
May 9, 2:11 AM MDTSevere Thunderstorm WatchSPCCurry, Harding, Lea, Quay, Roosevelt, Union8 hr
May 8, 6:27 PM MDTTornado WatchSPCCollin, Cooke, Dallas, Delta, Denton, Fannin and 15 more6 hr
May 8, 7:42 PM MDTMesoscale DiscussionSPCAndrews, Borden, Callahan, Coke, Coleman, Concho and 28 more2 hr
May 8, 9:43 PM MDTMesoscale DiscussionSPCBowie, Delta, Fannin, Franklin, Grayson, Hopkins and 5 more92 min
May 8, 9:48 PM MDTMesoscale DiscussionSPCAndrews, Borden, Callahan, Coke, Crane, Crockett and 26 more87 min
May 9, 3:03 AM MDTMesoscale DiscussionSPCArcher, Baylor, Clay, Fisher, Foard, Hardeman and 12 more57 min
May 9, 4:51 AM MDTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Castro, Childress, Collingsworth and 28 more84 min
May 9, 6:36 AM MDTSevere Thunderstorm WatchSPCFoard, Hardeman, Wichita, Wilbarger6 hr
May 9, 8:41 AM MDTMesoscale DiscussionSPCBowie, Camp, Cass, Collin, Cooke, Dallas and 25 more2 hr
May 9, 12:21 PM MDTTornado WatchSPCArcher, Baylor, Bosque, Brown, Callahan, Clay and 41 more10 hr
May 9, 12:58 PM MDTMesoscale DiscussionSPCBowie, Camp, Cass, Morris, Red River, Titus92 min
May 9, 1:40 PM MDTTornado WatchSPCBowie, Camp, Cass, Franklin, Morris, Red River and 1 more7 hr
May 9, 2:32 PM MDTMesoscale DiscussionSPCArcher, Clay, Coleman, Collin, Comanche, Cooke and 17 more118 min
May 9, 3:52 PM MDTMesoscale DiscussionSPCChildress, Collingsworth, Donley, Gray, Hall, Hemphill and 4 more83 min
May 9, 4:06 PM MDTMesoscale DiscussionSPCCass54 min
May 9, 4:52 PM MDTMesoscale DiscussionSPCBowie, Cass, Clay, Cooke, Delta, Fannin and 9 more83 min
May 9, 5:21 PM MDTMesoscale DiscussionSPCBrown, Coleman, Comanche, Eastland, Erath, Hood and 6 more84 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.