I know that BLU is military code and means "Ceiling at or above 2,500 feet; Visibility at or above 8,000 meters".

ETSH 241320Z 19007KT 9999 SCT048 SCT160 BKN200 08/03 Q1008 BLU+

ETSH 241220Z 20005KT 9999 FEW050 SCT160 BKN240 08/03 Q1009 BLU+

But what does + at the end signify?


1 Answer 1


Per the German Meteorological Service, the + means a ceiling 20,000 feet or higher.

BLU: visibility>=8000m, ceiling 2500 - <20000 ft

BLU+: visibility>=8000m, ceiling >=20000 ft


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.