Alert archive / Colorado / Mesoscale Discussions in 2015

Mesoscale Discussion 1964

November 17, 201516 counties in Colorado

The Storm Prediction Center issued this mesoscale discussion at Nov 17, 2015, 4:32 AM MST for 16 counties in Colorado. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Nov 17, 2015, 4:32 AM MST (11:32 UTC)
Expired: Nov 17, 2015, 8:30 AM MST
In force: 4 hr
Issued by: the Storm Prediction Center

Counties Arapahoe County, CO, Baca County, CO, Bent County, CO, Cheyenne County, CO, Crowley County, CO, El Paso County, CO, Elbert County, CO, Kiowa County, CO, Kit Carson County, CO, Las Animas County, CO, Lincoln County, CO, Otero County, CO, Prowers County, CO, Pueblo County, CO, Washington County, CO, Yuma County, CO

The radar

The Pueblo radar (KPUX), 81 km from the middle of the area, began a volume at 11:33 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

Dodge City, (KDDC), launched 00:00Z, 11.5 hours before the alert went out and 313 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: 994 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 812 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 351 m²/s²
0-3 km storm-relative helicity: 399 m²/s²
Significant tornado parameter: 2.5
Supercell composite: 11.3

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
Nov 16, 8:05 PM MST	Mesoscale Discussion	SPC	Adams, Arapahoe, Douglas, Elbert, El Paso	4 hr
Nov 17, 9:27 AM MST	Mesoscale Discussion	SPC	Adams, Arapahoe, Baca, Bent, Cheyenne, Crowley and 14 more	4 hr
Nov 17, 2:43 PM MST	Mesoscale Discussion	SPC	Baca, Bent, Cheyenne, Kiowa, Prowers	4 hr

Nearby

Mesoscale Discussions in Colorado, 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.