Alert archive / New Mexico / Mesoscale Discussions in 2017

Mesoscale Discussion 1671

September 25, 20179 counties in New Mexico; 8 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Sep 25, 2017, 12:14 AM MDT for 9 counties in New Mexico; 8 counties in Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Sep 25, 2017, 12:14 AM MDT (06:14 UTC)
Expired
Sep 25, 2017, 2:45 AM MDT
In force
3 hr
Issued by
the Storm Prediction Center
Chance of a watch
5%

Counties Chaves County, NM, Curry County, NM, De Baca County, NM, Eddy County, NM, Harding County, NM, Lea County, NM, Quay County, NM, Roosevelt County, NM, Union County, NM, Bailey County, TX, Cochran County, TX, Dallam County, TX, Deaf Smith County, TX, Hartley County, TX, Oldham County, TX, Parmer County, TX, Yoakum County, TX

The radar

The Cannon AFB radar (KFDX), 86 km from the middle of the area, began a volume at 06:15 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 00:00Z, 6.2 hours before the alert went out and 254 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-pSkew-T log-p diagram, Amarillo Airport, TX at 00:00Z on 2017-09-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 811 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Amarillo Airport, TX at 00:00Z on 2017-09-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 67 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
811 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
1067 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
67 m²/s²
0-3 km storm-relative helicity
113 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.6

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.

IssuedProductOfficeCountiesLasted
Sep 25, 2:53 PM MDTMesoscale DiscussionSPCChaves, De Baca, Eddy, Lea, Roosevelt2 hr

Nearby

Mesoscale Discussions in New Mexico, 2017Mesoscale Discussions in Texas, 2017Every 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.