Paul Lamar wrote:

Apparently this curve on the cowl is a low pressure area
as the air will tend to speed up and move laterally here
because of the high pressure build up in front of the
windshield.

>From Rob W M Shipley. glassman@tns.net

Paul your observations are spot on with reference to auto hoods and
windshields.  I own an autoglass company and if asked to test for low speed
wind noise on a vehicle with no reported water leaks these can be found by
spraying water on the inside of the windshield in the suspect location.
You'll get bubles every time where the gap in the seal is located.

Rob.

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