Alert archive / Utah / Mesoscale Discussions in 2011

Mesoscale Discussion 106

February 16, 20116 counties in Utah

The Storm Prediction Center issued this mesoscale discussion at Feb 16, 2011, 6:21 PM MST for 6 counties in Utah. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Feb 16, 2011, 6:21 PM MST (01:21 UTC)
Expired
Feb 16, 2011, 10:15 PM MST
In force
4 hr
Issued by
the Storm Prediction Center

Counties Cache County, UT, Davis County, UT, Morgan County, UT, Salt Lake County, UT, Utah County, UT, Weber County, UT

The radar

The Salt Lake City radar (KMTX), 61 km from the middle of the area, began a volume at 01:22 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 00:00Z, 1.4 hours before the alert went out and 24 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 00:00Z on 2011-02-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 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, Salt Lake City I, UT at 00:00Z on 2011-02-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 367 square meters per square second.1939587897117136Sfc1 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
2 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
2280 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
367 m²/s²
0-3 km storm-relative helicity
530 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 Utah, 2011Every mesoscale discussion in 2011

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.