What does OCNL CB mean?
isolated CB activity in
OCNL CB means isolated CB activity in 50-75% of the area. FRQ CB means isolated CB activity in more than 75% of the area. ISOL EMBD CB means EMBD CB in less than 50% of the area.
What is indicated of cloud amount well separated cumulonimbus?
OCNL. indicates an area of well-separated cumulonimbus and/or thunderstorms with a maximum spatial coverage between 50 and 75 percent of the area affected, or forecast to be affected, by the phenomena (at the fixed time or during the period of validity)
What does OCNL mean?
OCNL
| Acronym | Definition |
|---|---|
| OCNL | Occasional (weather forecasts) |
| OCNL | Ontorion Controlled Natural Language |
| OCNL | Oregon Coastal Natural Lake |
What is Sigmet aviation?
SIGMET Definition. • SIGMET information. Information issued by a meteorological watch office concerning the occurrence or expected occurrence of specified en-route weather phenomena which may affect the safety of aircraft operations.
How long is a Sigwx chart valid for?
Charts are valid for 00, 06, 12 and 18 UTC. SWH are normally available sixteen hours before validity; and SWM are normally available twenty hours before. Forecast charts are valid for the time point indicated (00, 06, 12 or 18 UTC) but are used for operations within three hours each side of this time.
How often are low-level significant prognostic charts?
Low altitude Significant Weather charts are issued four times daily and are valid at fixed times: 0000, 0600, 1200, and 1800 UTC. Each chart is divided on the left and right into 12 and 24 hour forecast intervals (based on the current NAM model available).
What does Schc mean in weather?
Slight chance
@iLikeMu. Yes, Ocnl = Occasional, Lkly = Likely, Chc = Chance, & Schc = Slight chance.
What is occasional rain mean?
Occasional Rain. Uha fakataimi. Not frequent but recurrent rain.
What does occasional weather mean?
As others have noted, to me, “occasional” means rain, just not all day. “Likely” means probably rain at some point in the day.