Alert archive / New Mexico / Mesoscale Discussions in 2018

Mesoscale Discussion 1539

October 7, 201811 counties in New Mexico; 6 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Oct 7, 2018, 4:59 PM MDT for 11 counties in New Mexico; 6 counties in Texas. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Oct 7, 2018, 4:59 PM MDT (22:59 UTC)
Expired: Oct 7, 2018, 6:30 PM MDT
In force: 91 min
Issued by: the Storm Prediction Center

Counties Chaves County, NM, Curry County, NM, De Baca County, NM, Doña Ana County, NM, Eddy County, NM, Guadalupe County, NM, Harding County, NM, Lincoln County, NM, Otero County, NM, Quay County, NM, Roosevelt County, NM, Bailey County, TX, Castro County, TX, Cochran County, TX, Deaf Smith County, TX, Oldham County, TX, Parmer County, TX

The radar

The Cannon AFB radar (KFDX), 65 km from the middle of the area, began a volume at 23:03 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, 11.0 hours before the alert went out and 247 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: 259 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 507 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 246 m²/s²
0-3 km storm-relative helicity: 275 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.9

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
Oct 6, 8:21 PM MDT	Mesoscale Discussion	SPC	Eddy	54 min
Oct 7, 1:07 PM MDT	Mesoscale Discussion	SPC	Chaves, Curry, De Baca, Eddy, Lea, Roosevelt	113 min
Oct 7, 1:53 PM MDT	Severe Thunderstorm Watch	SPC	Chaves, Curry, De Baca, Eddy, Guadalupe, Harding and 5 more	9 hr
Oct 7, 2:47 PM MDT	Mesoscale Discussion	SPC	Clay, Cooke, Foard, Grayson, Hardeman, Montague and 2 more	2 hr

Nearby

Mesoscale Discussions in New Mexico, 2018 Mesoscale Discussions in Texas, 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.