Alert archive / New Mexico / Mesoscale Discussions in 2015

Mesoscale Discussion 1870

October 21, 2015Chaves County, Otero County, New Mexico; Hudspeth County, Texas

The Storm Prediction Center issued this mesoscale discussion at Oct 21, 2015, 5:31 PM MDT for Chaves County, Otero County, New Mexico; Hudspeth County, Texas. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Oct 21, 2015, 5:31 PM MDT (23:31 UTC)
Expired: Oct 21, 2015, 7:00 PM MDT
In force: 89 min
Issued by: the Storm Prediction Center

Counties Chaves County, NM, Otero County, NM, Hudspeth County, TX

The radar

The Holloman AFB radar (KHDX), 131 km from the middle of the area, began a volume at 23:34 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

Santa Teresa, NM (KEPZ), launched 12:00Z, 11.5 hours before the alert went out and 142 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: 596 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 1493 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 0.7

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
Oct 20, 7:21 PM MDT	Mesoscale Discussion	SPC	Chaves, Curry, De Baca, Eddy, Guadalupe, Lea and 4 more	114 min
Oct 21, 9:50 AM MDT	Mesoscale Discussion	SPC	Doña Ana, Luna, Otero, Sierra	115 min
Oct 21, 12:16 PM MDT	Severe Thunderstorm Watch	SPC	Chaves, Doña Ana, Lincoln, Luna, Otero, Sierra and 1 more	8 hr
Oct 21, 12:22 PM MDT	Mesoscale Discussion	SPC	Chaves, Doña Ana, Eddy, Lincoln, Luna, Otero and 2 more	23 min
Oct 21, 2:23 PM MDT	Mesoscale Discussion	SPC	Doña Ana, Lincoln, Otero, Sierra, Socorro	2 hr
Oct 21, 4:32 PM MDT	Severe Thunderstorm Watch	SPC	Eddy, Lea	6 hr
Oct 21, 2:51 PM MDT	Mesoscale Discussion	SPC	Brewster, Culberson, Jeff Davis, Loving, Pecos, Presidio and 2 more	114 min
Oct 21, 3:23 PM MDT	Mesoscale Discussion	SPC	Carson, Hansford, Hemphill, Hutchinson, Lipscomb, Moore and 3 more	67 min

Nearby

Mesoscale Discussions in New Mexico, 2015 Mesoscale Discussions in Texas, 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.