Alert archive / New Mexico / Mesoscale Discussions in 2017

Mesoscale Discussion 1653

September 17, 201711 counties in New Mexico; 4 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Sep 17, 2017, 1:28 PM MDT for 11 counties in New Mexico; 4 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Sep 17, 2017, 1:28 PM MDT (19:28 UTC)
Expired: Sep 17, 2017, 3:30 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 60%

Counties Chaves County, NM, Colfax County, NM, Curry County, NM, De Baca County, NM, Guadalupe County, NM, Harding County, NM, Mora County, NM, Quay County, NM, Roosevelt County, NM, San Miguel County, NM, Union County, NM, Bailey County, TX, Cochran County, TX, Deaf Smith County, TX, Parmer County, TX

The radar

The Cannon AFB radar (KFDX), 64 km from the middle of the area, began a volume at 19:29 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 486Sep 17, 2:40 PM MDT

The nearest sounding before it

Albuquerq/Krtlnd, NM (KABQ), launched 12:00Z, 7.5 hours before the alert went out and 215 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: 7 J/kg
Mixed-layer CIN: -277 J/kg
Mixed-layer LCL: 2615 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -18 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
Sep 17, 2:41 PM MDT	Severe Thunderstorm Watch	SPC	Chaves, Colfax, Curry, De Baca, Eddy, Guadalupe and 7 more	7 hr
Sep 17, 4:44 PM MDT	Mesoscale Discussion	SPC	Colfax, Curry, De Baca, Harding, Lea, Quay and 3 more	91 min
Sep 17, 1:16 PM MDT	Mesoscale Discussion	SPC	Childress, Clay, Collingsworth, Cottle, Foard, Hardeman and 2 more	119 min

Nearby

Mesoscale Discussions in New Mexico, 2017 Mesoscale Discussions in Texas, 2017 Every mesoscale discussion in 2017

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.