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Post by tornado on Aug 11, 2014 10:16:00 GMT -5
Looking around the country, I came across this:
SPECI KAGS 101146Z 00000KT 1/4SM BR MIFG VV003 23/23 A3002
RMK AO2 T02280228 RVRNO
Can MIFG restrict VIS to 1/4SM? We know BR alone can't. Thoughts?
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Post by hlsto2 on Aug 11, 2014 10:43:51 GMT -5
the way I interpert 7900...3/4SM MIFG or 10SM MIFG could be valid. (7900 refers to =to or > 5/8SM at 6 feet agl...and vis <5/8SM down in the fog or 5 feet or less but ASOS won't accept 5/8SM unlike a manual obs)
in your example 1/4SM BR MIFG is incorrect anyway. Using ASOS it would have to be 3/4SM BR MIFG. (vis being based on the first present weather entry which is BR)
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Post by alstein on Aug 11, 2014 17:28:18 GMT -5
The way I interpret it, it would be MIFG FG for 1/4SM. "Midget fog" by logic cannot obscure by itself, as you can see over it unless you are a midget.
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