Oscar de-en
Objektive Analyse → objective analysis
OBS (beobachten, beobachted, Beobachtung) → OBS (Observe, observed, observation)
OBSC (verdeckt, verdeckend) → OBSC (Obscure or obscured or obscuring)
Observer → Observer
OCNL (gelegentlich, zeitweise) → OCNL (occassional or occasionally)
OCNL (häufige, aber noch deutlich getrennte CBs / TCUs, Bedeckungsgrad zwischen 50 und 75 %) → OCNL (area with coverage between 50 and 75% of Thunderstorms)
OCT (Oktober) → OCT (October)
offene See → offshore
Offene See → open ocean
okkludiertes Tiefdruckgebiet → occluded depression
Okklusionsfront → occluded front ökologische Nische → ecological niche
OPA (opakes milchiges Eis) → OPA (Opaque, white type of ice)
OPMET (operational meteorological control) → OPMET (operational meteorological control)
Orkan (Windstärke) → hurricane (wind force)
orkanartiger Sturm (Windstärke) → violent storm (wind force)
Orkantief → cyclonic depression
Orkantief → cyclonic low
orografische Hebung → orographic lift
orografische Hebung → orographic lifting
orografische Hebung → orographic uplift
orographisch → orographic
orographische Hebung → orographic lifting
orographische Hebung → orographic uplift
orographische Hebung → upslope flow
orographische Hebung → orographic ascent
orographische Wolke → cap cloud
örtlich → isolated
Ortszeit → local time
Ortszeit → local time L.T.
Ost-Wetterlage (Ostlage) →
Ostlage → easterly regime
Ostwind → easterly wind
Ostwinde → easterlies
OSV (ocean station vessel; Wetterschiff) → OSV (ocean station vessel)
OTLK (Outlook, Ausblick) → OTLK (Outlook)
OTP (on top; oberhalb der Wolkenobergrenze) → OTP (on top)
OVC (Overcast, 8/8) → OVC (Overcast, 8/8)
Overall → overall
Ozean → ocean
Ozon → ozone
Ozongehalt → ozone content
Ozonloch → ozone hole
Ozonschicht → ozone layer