WMOD00591

• Title: Investigations of Winter Storms over the Wasatch Plateau during the 1994 NOAA-Utah Field Research Program - Final Report
• Date: 7/1/1996
• State: UT
• Weather Modification - Doc Type: Report

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F/~lJre 25. .\'ame as F'K. 4, except for 0000 GMT on 20 Fehruury (/7()() A/Sf' /9 Feb) /99-1.

of the short wave axis actually caused winds over the research area 10 back to south-southeasterly
during the day on 20 February. This also produced a warm advection pattern over the south through
central pan of Utah. The short wavc's influence over RRS is ShO\\l1 in Fig. 26. SLW development
over the western slopt.--s of the Wasatch Plateau was inhibited by a dO\\l1S1opc wind component for
much oflhc day. The trough axis appears to have passed RRS at ahout J600 when the wind began
veering to southwesterly, and the warm advection ceased. In the post-trough environment SLW
developed almost immediately, but no seeding expcriments were conducted since this occurred latt:
in the day,
As the short \\-'ave noted above continued into Idaho and Wyoming. another short wave slid
beneath Utah and caused a minor split in the westerlies over Nevada and Utah by 0500 on 21
February. The resulting cloud pattern is shown in Fig. 27 at 1100 on 21 Fchruary, \\-here the main

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