WMOD00400

• Contract/Permit #: 14-06-D-6801
• Title: Structure and Seedability of San Juan Storms
• Date: 11/1/1976
• Weather Modification - Doc Type: Report

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From a single station analysis of the Durango rawinsonde data and the

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mesoscale streamline analysis of the E.G. & G. surface synoptic winds it was

possible to synthesize a detailed picture of the storm structure and its

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sequence. From the standard National Weather Service data it was possible

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to understand the San Juan storms in relation to the macroscale dynamics.

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The microscale characteristics of the individual storms were discerned from

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the aircraft and ground data.

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III. Su}fr~RY OF ~~JOR RESULTS AND CONCLUSIONS

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A sunnnary of the major results and conclusions drm\ln from these studies

will be presented in this section. The major analysis effort was concentrated

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on the storms studied and flights made during the 1974-75 \\linter season. One

flight \.]as made in 1973 and three storms were flOlm in 1974. Since in

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December 1974 the \;lyoming Q/A was neHly equipped \<lith a rather complete com-

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pliment of cloud physics equipment and a Doppler system for horizontal winds

and the NCAR QI A was ne'ivly equipped 'i-lith an inertial navigation system in

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January 1975 and a ne\\lly installed air sensing probe in March 1975, it

seemed appropriate that the analysis concentrate on these quality data.

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Each storm studied and flight made over Wolf Creek Pass during the 1974-75

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season is described in detail in Section V. This is not to imply that the

storms and flights made in 1973 and 1974 were ignored. Indeed, the results

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and conclusions presented in this section are consistent with the earlier

data but the earlier data were not as complete and therefore could not

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support the results and conclusions so well.

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