Alert archive / Texas / Mesoscale Discussions in 2014

Mesoscale Discussion 1647

August 31, 20146 counties in Kansas; Beaver County, Oklahoma; 11 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Aug 31, 2014, 3:46 PM CDT for 6 counties in Kansas; Beaver County, Oklahoma; 11 counties in Texas. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Aug 31, 2014, 3:46 PM CDT (20:46 UTC)
Expired: Aug 31, 2014, 5:45 PM CDT
In force: 119 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Finney County, KS, Gray County, KS, Haskell County, KS, Kearny County, KS, Meade County, KS, Seward County, KS, Beaver County, OK, Armstrong County, TX, Briscoe County, TX, Donley County, TX, Floyd County, TX, Gray County, TX, Hale County, TX, Hemphill County, TX, Lipscomb County, TX, Lubbock County, TX, Ochiltree County, TX, Roberts County, TX

The radar

The Amarillo radar (KAMA), 90 km from the middle of the area, began a volume at 20:47 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

Dodge City, (KDDC), launched 12:00Z, 8.8 hours before the alert went out and 240 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 238 J/kg
Mixed-layer CIN: -355 J/kg
Mixed-layer LCL: 2269 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 403 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

Issued	Product	Office	Counties	Lasted
Aug 31, 2:20 PM CDT	Mesoscale Discussion	SPC	Cloud, Jewell, Marshall, Mitchell, Osborne, Phillips and 4 more	85 min
Aug 31, 3:31 PM CDT	Tornado Watch	SPC	Clay, Cloud, Jewell, Marshall, Mitchell, Osborne and 6 more	5 hr
Aug 31, 5:17 PM CDT	Mesoscale Discussion	SPC	Barton, Edwards, Ellsworth, Ford, Gray, Harvey and 12 more	58 min
Aug 31, 5:34 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Barton, Brown, Chase, Clark, Coffey and 33 more	9 hr
Aug 31, 6:07 PM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Clay, Doniphan, Jackson, Marshall and 3 more	83 min

Nearby

Mesoscale Discussions in Texas, 2014 Mesoscale Discussions in Kansas, 2014 Mesoscale Discussions in Oklahoma, 2014 Every mesoscale discussion in 2014

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.