Whistle noise in cold weather

[garyheskett All 49 x 3 st.louis]

97 Standard, 131,000 miles..  This morning I went out on the bike to go to breakfast, it was 2 degrees.  I only have to go one mile to get to the highway. As soon as I got on the highway and got up to 50-60 mph, I got a loud whistle or whine that sounded like it was coming from the gas tank area. No mechanical sound, just a high pitch steady whistle/whine. It will make the noise for several miles or till I pull over and stop on the side of the road (to much snow and ice on shoulder to pull over).  It has done this several times in years past, but only if it is around 10 degrees or below.  Bike runs fine, slowed done for a stoplight, noise quit, runs fine the rest of the way.  No real problem (that I know of), just curious if anybody knows what the noise could be.

[sandy]

It's the wind passing over those tightly pursed lips when it's too cold to grin. Seriously: Check panels, bolts, front fender underside. There's suppose to be 4 rubber pads glued under there. Maybe one's loose.

Sorry for your weather. I'm riding to dinner tonight. Gonna hit 72 today.

[98pacecar]

My bet is,,, dat it's all da peeps in cars,,,, whistlin,,,,   

 ta get yer attention,,,, ta tell ya, it's too cold,, ta be out,,,,,,,,,, on a motorcycle...   

[Michvalk]

Might check vacuum lines for cracks. You know, shrinkage in the cold opens the cracks, heat closes the cracks

[BigBad1]

Check your tire pressure with the tire cold. With those cold temps, it could be a little low until the tire heats up enough to raise the pressure.