Alert archive / Colorado / Mesoscale Discussions in 2017

Mesoscale Discussion 671

May 9, 201710 counties in Colorado

The Storm Prediction Center issued this mesoscale discussion at May 9, 2017, 2:29 PM MDT for 10 counties in Colorado. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: May 9, 2017, 2:29 PM MDT (20:29 UTC)
Expired: May 9, 2017, 4:00 PM MDT
In force: 91 min
Issued by: the Storm Prediction Center

Counties Baca County, CO, Bent County, CO, Cheyenne County, CO, Crowley County, CO, Kiowa County, CO, Las Animas County, CO, Lincoln County, CO, Otero County, CO, Prowers County, CO, Pueblo County, CO

The radar

The Pueblo radar (KPUX), 125 km from the middle of the area, began a volume at 20:30 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 201May 9, 5:50 PM MDT

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 8.5 hours before the alert went out and 224 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 780 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: -22 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
May 8, 6:18 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Baca, Bent, Cheyenne, Crowley and 17 more	87 min
May 9, 9:55 AM MDT	Mesoscale Discussion	SPC	Las Animas	3 hr
May 9, 11:15 AM MDT	Severe Thunderstorm Watch	SPC	Bent, Costilla, Crowley, Huerfano, Las Animas, Otero and 1 more	9 hr
May 9, 5:24 PM MDT	Mesoscale Discussion	SPC	Baca, Bent, Cheyenne, Costilla, Crowley, Huerfano and 6 more	66 min
May 9, 5:51 PM MDT	Severe Thunderstorm Watch	SPC	Baca, Bent, Cheyenne, Kiowa, Kit Carson, Prowers and 1 more	7 hr

Nearby

Mesoscale Discussions in Colorado, 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.