Alert archive / Colorado / Mesoscale Discussions in 2017

Mesoscale Discussion 1444

August 4, 201718 counties in Colorado; Colfax County, New Mexico

The Storm Prediction Center issued this mesoscale discussion at Aug 4, 2017, 2:48 PM MDT for 18 counties in Colorado; Colfax County, New Mexico. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Aug 4, 2017, 2:48 PM MDT (20:48 UTC)
Expired
Aug 4, 2017, 4:45 PM MDT
In force
117 min
Issued by
the Storm Prediction Center
Chance of a watch
5%

Counties Adams County, CO, Arapahoe County, CO, Bent County, CO, Cheyenne County, CO, Crowley County, CO, Denver County, CO, El Paso County, CO, Elbert County, CO, Huerfano County, CO, Kiowa County, CO, Kit Carson County, CO, Las Animas County, CO, Lincoln County, CO, Morgan County, CO, Otero County, CO, Prowers County, CO, Pueblo County, CO, Washington County, CO, Colfax County, NM

The radar

The Pueblo radar (KPUX), 23 km from the middle of the area, began a volume at 20:50 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, 8.8 hours before the alert went out and 187 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 2017-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 62 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, Denver, CO at 12:00Z on 2017-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.19395878Sfc1 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
62 J/kg
Mixed-layer CIN
-383 J/kg
Mixed-layer LCL
1868 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
77 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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Nearby

Mesoscale Discussions in Colorado, 2017Mesoscale Discussions in New Mexico, 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.