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Skew-T Diagram for Grand Junction, CO

#23 Grand Junction, Colorado

CAPE:

 Decent: 753 J/kg, no CIN. You rarely see greater than 1000 J/kg west of the Rockies outside of Arizona

Deep Layer Shear:

 Decent: 35-40 knots 0-6 km AGL shear, unidirectional

Mid-level Lapse Rates:

 Good. Would be excellent but lapse rates are very weak just above -20C

Freezing Level:

 14.7 kft

Overall Threat of Severe Hail:

 Slight: Close to moderate because of all the parameters being at least decent to good. Would not be surprised at a few 1.00 inch hail reports.

Summary of the Event:

Date of Sounding: 17 August 2005 @ 00 UTC
Montrose County, Colorado at 20:20 UTC on 16 Aug 2005 1.00 inch hail was reported in Montrose. Further west into Utah, the storms were more intense. Flash flooding occurred in Moab. The big story was the large hail in the Green River, UT area (not much out there, take my word for it). At 23:45 UTC 1.50 inch hail was reported in Castle Dale, and at 00:00 UTC golfball hail was reported 20 miles southwest of Green River.

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