Alert archive / Colorado / Mesoscale Discussions in 2018

Mesoscale Discussion 723

June 13, 201812 counties in Colorado; 4 counties in New Mexico

The Storm Prediction Center issued this mesoscale discussion at Jun 13, 2018, 1:42 PM MDT for 12 counties in Colorado; 4 counties in New Mexico. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 13, 2018, 1:42 PM MDT (19:42 UTC)
Expired
Jun 13, 2018, 3:45 PM MDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
5%

Counties Adams County, CO, Arapahoe County, CO, Crowley County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Huerfano County, CO, Las Animas County, CO, Lincoln County, CO, Otero County, CO, Pueblo County, CO, Colfax County, NM, Harding County, NM, Mora County, NM, Union County, NM

The radar

The Pueblo radar (KPUX), 86 km from the middle of the area, began a volume at 19:46 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, 7.7 hours before the alert went out and 263 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, Denver, CO at 12:00Z on 2018-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 663 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2018-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.193958Sfc1 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
663 J/kg
Mixed-layer CIN
-395 J/kg
Mixed-layer LCL
1740 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
78 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.

IssuedProductOfficeCountiesLasted
Jun 13, 1:25 AM MDTMesoscale DiscussionSPCCheyenne, Elbert, El Paso, Kit Carson, Lincoln3 hr
Jun 13, 5:31 PM MDTMesoscale DiscussionSPCBaca, Bent, Cheyenne, Kiowa, Kit Carson, Phillips and 2 more89 min

Nearby

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