Outside temperature 'dings'
#26
#27
#28
I know that overpasses, say, freeze first because the effect of intermal ground heat isn't there to help keep the road surface warmer than that of the ambient air about it.
[edit:]And to conclude my little side conjecture, I've found two links which validate my guess. The movement of above-freezing ambient air cannot, alone, cause an above-freezing substance to freeze. This is true in the case of frostbite on an animal's skin and for water on a road surface.
~Neal
Last edited by The Meal; 11-30-2007 at 01:29 PM. Reason: Resolution of my conjecture.
#32
According to the owner's manual, it is a warning that "There is an increased risk of black ice."
Check this for more info on black ice: http://en.wikipedia.org/wiki/Black_ice
Check this for more info on black ice: http://en.wikipedia.org/wiki/Black_ice
#33
I also found out that as it warns you about 37 F, if you have the nav display and the temp is still dropping, the warning message at the bottom of the nav drops with the temp. The message started out at 37 but changed to 36 and 35 while it was still up. Nice warning for the unexpected ice conditions.
#35
driving from Turlock To Patterson last night at 6pm - got the "ding" right at 37 degrees - I am really wondering just how accurate this thing really is... I am thinking it is reading somewhat Low - I really question it being 37 last night - Ya, I know dips in the road can hold cold air... on the way to Patterson, it actually got down to 32 on the dash but then went right back up to 40?????????? Anyone else question their numbers ?
#36
BINGO!!!! WE HAVE A WINNER!!!
According to James Spann, Birmingham Metorologist; ICE can and more often than not forms on bridges before on roads due to the wind chill factor. If the outside temp dips to at least 37, you can bet if there is any moisture at all due to dew fall or even light rain, you will have ice on bridges.
MINI is so smart
and so thoughtful the way they watch out for all of us
#37
BINGO!!!! WE HAVE A WINNER!!!
According to James Spann, Birmingham Metorologist; ICE can and more often than not forms on bridges before on roads due to the wind chill factor. If the outside temp dips to at least 37, you can bet if there is any moisture at all due to dew fall or even light rain, you will have ice on bridges.
MINI is so smart
and so thoughtful the way they watch out for all of us
According to James Spann, Birmingham Metorologist; ICE can and more often than not forms on bridges before on roads due to the wind chill factor. If the outside temp dips to at least 37, you can bet if there is any moisture at all due to dew fall or even light rain, you will have ice on bridges.
MINI is so smart
and so thoughtful the way they watch out for all of us
Meterologists have a standard distance above ground from which temperatures are measured and reported (I forget exactly what it is though). Hence, the above ground (air) T can be above freezing (37, say), but the ground may be at freezing point or below (i.e., 32 or below). Water will not freeze at 37 even with wind (unless of course the wind is 32 or less thus reducing the T of the water below 32).
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