Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 141

March 25, 2015Cotton County, Jefferson County, Tillman County, Oklahoma; 15 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 25, 2015, 2:50 PM CDT for Cotton County, Jefferson County, Tillman County, Oklahoma; 15 counties in Texas. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Mar 25, 2015, 2:50 PM CDT (19:50 UTC)
Expired: Mar 25, 2015, 4:45 PM CDT
In force: 115 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Cotton County, OK, Jefferson County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Haskell County, TX, Jack County, TX, Jones County, TX, Montague County, TX, Palo Pinto County, TX, Shackelford County, TX, Stephens County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Wise County, TX, Young County, TX

The radar

The Altus AFB radar (KFDR), 99 km from the middle of the area, began a volume at 19:50 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

Fort Worth, TX (KFWD), launched 12:00Z, 7.8 hours before the alert went out and 147 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: 702 J/kg
Mixed-layer CIN: -301 J/kg
Mixed-layer LCL: 1019 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 189 m²/s²
0-3 km storm-relative helicity: 199 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
Mar 24, 7:34 PM CDT	Mesoscale Discussion	SPC	Latimer, LeFlore, Pittsburg	116 min
Mar 25, 1:45 PM CDT	Mesoscale Discussion	SPC	Adair, Caddo, Canadian, Carter, Cherokee, Cleveland and 32 more	3 hr
Mar 25, 2:16 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Caddo, Canadian, Cherokee, Cleveland, Coal and 41 more	8 hr
Mar 25, 5:09 PM CDT	Mesoscale Discussion	SPC	Caddo, Comanche, Kiowa, Washita	66 min
Mar 25, 5:33 PM CDT	Mesoscale Discussion	SPC	Adair, Canadian, Cherokee, Cleveland, Craig, Creek and 35 more	87 min

Nearby

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