Alert archive / Colorado / Mesoscale Discussions in 2005

Mesoscale Discussion 2172

September 9, 20055 counties in Colorado; 5 counties in Utah

The Storm Prediction Center issued this mesoscale discussion at Sep 9, 2005, 5:59 PM MDT for 5 counties in Colorado; 5 counties in Utah. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Sep 9, 2005, 5:59 PM MDT (23:59 UTC)
Expired: Sep 9, 2005, 7:30 PM MDT
In force: 91 min
Issued by: the Storm Prediction Center

Counties Dolores County, CO, Mesa County, CO, Montrose County, CO, Rio Blanco County, CO, San Miguel County, CO, Carbon County, UT, Emery County, UT, Grand County, UT, San Juan County, UT, Uintah County, UT

The radar

The Grand Junction radar (KGJX), 124 km from the middle of the area, began a volume at 00:00 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

Grand Junction, CO (KGJT), launched 12:00Z, 12.0 hours before the alert went out and 103 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 330 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 1079 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.2

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.

Issued	Product	Office	Counties	Lasted
Sep 9, 2:50 PM MDT	Severe Thunderstorm Watch	SPC	Dolores, Mesa, Moffat, Montezuma, Rio Blanco, San Miguel	4 hr
Sep 9, 12:07 PM MDT	Mesoscale Discussion	SPC	Beaver, Cache, Carbon, Daggett, Davis, Duchesne and 20 more	113 min
Sep 9, 12:35 PM MDT	Severe Thunderstorm Watch	SPC	Carbon, Davis, Duchesne, Emery, Garfield, Juab and 11 more	7 hr

Nearby

Mesoscale Discussions in Colorado, 2005 Mesoscale Discussions in Utah, 2005 Every mesoscale discussion in 2005

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.