Alert archive / Colorado / Mesoscale Discussions in 2012

Mesoscale Discussion 1295

June 27, 201219 counties in Colorado; Banner County, Cheyenne County, Kimball County, Nebraska; Laramie County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jun 27, 2012, 1:25 PM MDT for 19 counties in Colorado; Banner County, Cheyenne County, Kimball County, Nebraska; Laramie County, Wyoming. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Jun 27, 2012, 1:25 PM MDT (19:25 UTC)
Expired
Jun 27, 2012, 4:00 PM MDT
In force
3 hr
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 23 counties

Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Gilpin County, CO, Jefferson County, CO, Kit Carson County, CO, Larimer County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Teller County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Banner County, NE, Cheyenne County, NE, Kimball County, NE, Laramie County, WY

The radar

The Denver radar (KFTG), 64 km from the middle of the area, began a volume at 19:25 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, 7.4 hours before the alert went out and 67 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 2012-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2012-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3667 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
23 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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Nearby

Mesoscale Discussions in Colorado, 2012Mesoscale Discussions in Nebraska, 2012Mesoscale Discussions in Wyoming, 2012Every mesoscale discussion in 2012

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.