Alert archive / New Mexico / Mesoscale Discussions in 2018

Mesoscale Discussion 1266

August 8, 201811 counties in New Mexico; Cimarron County, Oklahoma; 8 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Aug 8, 2018, 4:32 PM MDT for 11 counties in New Mexico; Cimarron County, Oklahoma; 8 counties in Texas. It was in force for 118 min.

The area

The outline as issued.

The facts

Issued: Aug 8, 2018, 4:32 PM MDT (22:32 UTC)
Expired: Aug 8, 2018, 6:30 PM MDT
In force: 118 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Chaves County, NM, Curry County, NM, De Baca County, NM, Guadalupe County, NM, Harding County, NM, Lincoln County, NM, Mora County, NM, Quay County, NM, Roosevelt County, NM, San Miguel County, NM, Union County, NM, Cimarron County, OK, Dallam County, TX, Deaf Smith County, TX, Hartley County, TX, Moore County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Sherman County, TX

The radar

The Cannon AFB radar (KFDX), 59 km from the middle of the area, began a volume at 22:32 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 12:00Z, 10.5 hours before the alert went out and 201 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: 30 J/kg
Mixed-layer CIN: -291 J/kg
Mixed-layer LCL: 2381 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -57 m²/s²
0-3 km storm-relative helicity: -19 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 7, 7:57 PM MDT	Mesoscale Discussion	SPC	Colfax, Union	2 hr
Aug 8, 2:02 AM MDT	Mesoscale Discussion	SPC	Alfalfa, Atoka, Blaine, Caddo, Canadian, Cleveland and 26 more	88 min

Nearby

Mesoscale Discussions in New Mexico, 2018 Mesoscale Discussions in Texas, 2018 Mesoscale Discussions in Oklahoma, 2018 Every mesoscale discussion in 2018

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.