Hello Guys, My ASN is having trouble interpolating visibility. No matter what setting I use I get a visibility of  9.0 SM (9999+ m). I set maximum surface visibility to 8SM and it only applies to stations that have active or current weather metars, but for other stations that are fully interpolated by ASN the visibility is always  9.0 SM (9999+ m). everything else works perfectly. Example.

 

DNMM 171036Z 09304KT 9999 NOSIG 32/16 Q1013 RMK ADVANCED INTERPOLATION

 

Decoded textual weather for DNMM

 

Wind: 093 at 4 knots 

Visibility: 9.0 SM (9999+ m)

Clouds: None Reported

Temperature: 32.0C

Dewpoint: 16.0C

Precipitation: None reported

Altimeter: 1013 mb (29.92 inches)

 

Surface winds calculated from the closest data grid point

 

Surface temps calculated from the closest data grid point

 

Visibility interpolation based on:

  -DBBB 58nm SW (2000), DXSK 194nm NW (5000)

Altimeter interpolation based on:

  -DBBB 58nm SW (Q1013), DXNG 233nm NW (Q1018)

Precipitation based on extended grid weather data

 

No replies usually means no one else is seeing the same problem... :(