PPRuNe Forums - View Single Post - Iberia IB6166, BOS-MAD, 2nd Dec, Cowboys !!!!
Old 9th Dec 2007, 01:12
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SaturnV
 
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One additional point on the amount of snow recorded at KBOS on December 2.

Often, a ratio of 10:1 for snow : precipitable water amount is used (assuming air temperature of about -3 Celsius); the ratio is higher when the temperature is lower (such as -8 Celsius), and the ratio is less if the temperature is near or at freezing.

The 0.04 inches of precipitable water corresponds rather nicely with the measured 0.3 inch total snow amount reported for the airport for the entire 24 hour period.

The reported wind direction at KBOS, from the northwest, would tend to support a lighter or fluffier snow than if the wind had been from the east or northeast and off the water.
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Air Florida took off in the midst of a continuing snowstorm, and after KDCA had been closed for about 90 minutes so the runway could be plowed.

Last edited by SaturnV; 9th Dec 2007 at 01:14. Reason: get rid of emotion caused by coding
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