Alert archive / Colorado / Mesoscale Discussions in 2018

Mesoscale Discussion 1259

August 7, 201814 counties in Colorado; Colfax County, Union County, New Mexico

The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2018, 4:44 PM MDT for 14 counties in Colorado; Colfax County, Union County, New Mexico. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 7, 2018, 4:44 PM MDT (22:44 UTC)
Expired: Aug 7, 2018, 6:45 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Bent County, CO, Costilla County, CO, Crowley County, CO, Custer County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Fremont County, CO, Huerfano County, CO, Las Animas County, CO, Lincoln County, CO, Otero County, CO, Pueblo County, CO, Teller County, CO, Colfax County, NM, Union County, NM

The radar

The Pueblo radar (KPUX), 49 km from the middle of the area, began a volume at 22:46 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

Denver, CO (KDEN), launched 12:00Z, 10.7 hours before the alert went out and 213 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: 570 J/kg
Mixed-layer CIN: -127 J/kg
Mixed-layer LCL: 1535 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 25 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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
Aug 6, 8:06 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Bent, Boulder, Broomfield, Crowley and 20 more	54 min
Aug 7, 12:59 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Bent, Broomfield, Crowley, Denver and 10 more	2 hr
Aug 7, 1:45 PM MDT	Severe Thunderstorm Watch	SPC	Bent, Crowley, Custer, Douglas, Elbert, El Paso and 7 more	7 hr

Nearby

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