Alert archive / Utah / Mesoscale Discussions in 2014

Mesoscale Discussion 975

June 12, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2014, 2:39 PM MDT for 4 states. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
Jun 12, 2014, 2:39 PM MDT (20:39 UTC)
Expired
Jun 12, 2014, 3:45 PM MDT
In force
66 min
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 23 counties

Moffat County, CO, Bear Lake County, ID, Franklin County, ID, Box Elder County, UT, Cache County, UT, Carbon County, UT, Daggett County, UT, Davis County, UT, Duchesne County, UT, Juab County, UT, Morgan County, UT, Rich County, UT, Salt Lake County, UT, Sanpete County, UT, Summit County, UT, Tooele County, UT, Uintah County, UT, Utah County, UT, Wasatch County, UT, Weber County, UT, Lincoln County, WY, Sweetwater County, WY, Uinta County, WY

The radar

The Salt Lake City radar (KMTX), 128 km from the middle of the area, began a volume at 20:39 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

Salt Lake City I, UT (KSLC), launched 12:00Z, 8.7 hours before the alert went out and 70 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, Salt Lake City I, UT at 12:00Z on 2014-06-12Temperature 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, Salt Lake City I, UT at 12:00Z on 2014-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 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
3957 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
102 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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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 12, 1:44 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Crowley, Denver, Douglas, Elbert and 8 more91 min

Nearby

Mesoscale Discussions in Utah, 2014Mesoscale Discussions in Wyoming, 2014Mesoscale Discussions in Idaho, 2014Every mesoscale discussion in 2014

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.