Alert archive / Oklahoma / Mesoscale Discussions in 2015

Mesoscale Discussion 332

April 17, 201512 counties in Oklahoma; 7 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 17, 2015, 2:02 AM CDT for 12 counties in Oklahoma; 7 counties in Texas. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Apr 17, 2015, 2:02 AM CDT (07:02 UTC)
Expired
Apr 17, 2015, 3:30 AM CDT
In force
88 min
Issued by
the Storm Prediction Center

Counties Beckham County, OK, Blaine County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Roger Mills County, OK, Washita County, OK, Woodward County, OK, Collingsworth County, TX, Donley County, TX, Gray County, TX, Hemphill County, TX, Lipscomb County, TX, Roberts County, TX, Wheeler County, TX

The radar

The Altus AFB radar (KFDR), 148 km from the middle of the area, began a volume at 07:05 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 nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 7.0 hours before the alert went out and 211 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 2015-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 301 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 2015-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 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
301 J/kg
Mixed-layer CIN
-116 J/kg
Mixed-layer LCL
1659 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
142 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
Apr 16, 7:08 PM CDTMesoscale DiscussionSPCBeckham, Ellis, Roger Mills2 hr
Apr 16, 7:16 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Comanche, Cotton, Custer and 10 more89 min
Apr 16, 7:44 PM CDTMesoscale DiscussionSPCCimarron, Texas61 min
Apr 16, 8:56 PM CDTMesoscale DiscussionSPCRoger Mills94 min
Apr 16, 9:17 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Custer, Dewey, Garfield and 5 more88 min
Apr 16, 10:20 PM CDTMesoscale DiscussionSPCBeckham, Ellis, Harmon, Roger Mills2 hr
Apr 16, 11:59 PM CDTSevere Thunderstorm WatchSPCBeckham, Blaine, Custer, Dewey, Ellis, Greer and 4 more5 hr
Apr 17, 4:43 AM CDTMesoscale DiscussionSPCBeckham, Blaine, Caddo, Canadian, Comanche, Custer and 8 more62 min
Apr 17, 3:06 PM CDTMesoscale DiscussionSPCAlfalfa, Beaver, Beckham, Blaine, Custer, Dewey and 12 more84 min
Apr 16, 8:20 PM CDTMesoscale DiscussionSPCBrazoria, Chambers, Colorado, Fort Bend, Galveston, Harris and 2 more85 min
Apr 16, 8:36 PM CDTTornado WatchSPCAustin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 10 more3 hr
Apr 16, 11:33 PM CDTMesoscale DiscussionSPCAustin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 6 more87 min
Apr 17, 1:10 AM CDTMesoscale DiscussionSPCBorden, Childress, Cottle, Crosby, Dawson, Dickens and 13 more95 min
Apr 17, 10:26 AM CDTMesoscale DiscussionSPCBandera, Bexar, Blanco, Burnet, Comal, Edwards and 12 more2 hr
Apr 17, 10:55 AM CDTMesoscale DiscussionSPCBaylor, Brown, Callahan, Coke, Coleman, Concho and 15 more2 hr
Apr 17, 11:53 AM CDTSevere Thunderstorm WatchSPCArcher, Atascosa, Bandera, Baylor, Bee, Bell and 73 more7 hr
Apr 17, 1:31 PM CDTMesoscale DiscussionSPCAtascosa, Bee, Calhoun, DeWitt, Dimmit, Frio and 12 more89 min
Apr 17, 3:22 PM CDTMesoscale DiscussionSPCAransas, Bee, Brazoria, Calhoun, Colorado, DeWitt and 11 more113 min
Apr 17, 3:30 PM CDTSevere Thunderstorm WatchSPCAransas, Atascosa, Austin, Bastrop, Brazoria, Brazos and 30 more6 hr
Apr 17, 5:02 PM CDTMesoscale DiscussionSPCArcher, Baylor, Bosque, Brown, Callahan, Clay and 28 more88 min
Apr 17, 5:41 PM CDTMesoscale DiscussionSPCAransas, Atascosa, Bee, Brazoria, Brooks, Calhoun and 26 more94 min
Apr 17, 6:57 PM CDTTornado WatchSPCAransas, Bee, Brooks, Calhoun, Duval, Goliad and 16 more5 hr

Nearby

Mesoscale Discussions in Oklahoma, 2015Mesoscale Discussions in Texas, 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.