Alert archive / Colorado / Mesoscale Discussions in 2019

Mesoscale Discussion 1902

August 30, 201917 counties in Colorado; Colfax County, Mora County, San Miguel County, New Mexico; Laramie County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at Aug 30, 2019, 2:13 PM MDT for 17 counties in Colorado; Colfax County, Mora County, San Miguel County, New Mexico; Laramie County, Wyoming. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Aug 30, 2019, 2:13 PM MDT (20:13 UTC)
Expired
Aug 30, 2019, 4:45 PM MDT
In force
3 hr
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 21 counties

Adams County, CO, Arapahoe County, CO, Broomfield County, CO, Crowley County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Huerfano County, CO, Jefferson County, CO, Las Animas County, CO, Lincoln County, CO, Morgan County, CO, Otero County, CO, Pueblo County, CO, Teller County, CO, Weld County, CO, Colfax County, NM, Mora County, NM, San Miguel County, NM, Laramie County, WY

The radar

The Pueblo radar (KPUX), 91 km from the middle of the area, began a volume at 20:17 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 (KDNR), launched 12:00Z, 8.2 hours before the alert went out and 268 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 2019-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 65 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 2019-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 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
65 J/kg
Mixed-layer CIN
-414 J/kg
Mixed-layer LCL
2000 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
64 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
Aug 30, 4:54 PM MDTMesoscale DiscussionSPCConverse, Goshen, Niobrara, Platte, Weston96 min

Nearby

Mesoscale Discussions in Colorado, 2019Mesoscale Discussions in New Mexico, 2019Mesoscale Discussions in Wyoming, 2019Every mesoscale discussion in 2019

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.