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VFR / VMC visibility requirements in the US. In aviation, visual meteorological conditions (VMC) is an aviation flight category in which visual flight rules (VFR) flight is permitted—that is, conditions in which pilots have sufficient visibility to fly the aircraft maintaining visual separation from terrain and other aircraft.
Cloud-cover symbols used on weather teleprinters and aviation reports in the US [6] In the early 20th century, it was common for weather maps to be hand drawn. The symbols for cloud cover on these maps, like the modern symbols, were drawn inside the circle marking the position of the weather station making the measurements.
Under visual meteorological conditions, the minimum visual range, distance from clouds, or cloud clearance requirements to be maintained above ground vary by jurisdiction, and may also vary according to the airspace in which the aircraft is operating. [4] In some countries, VFR flight is permitted at night, and is known as night VFR.
[1] In some countries pilots are required to get an air traffic control (ATC) clearance, or in absence of a controller, advise the nearest flight service station or center. Pilots are required to adhere to VFR minima when climbing and descending over the clouds. Flight in cloud is not permitted. [1]
"Few" = 1–2 oktas SCT "Scattered" = 3–4 oktas BKN "Broken" = 5–7 oktas OVC "Overcast" = 8 oktas, i.e., full cloud coverage TCU Towering cumulus cloud, e.g., SCT016TCU CB Cumulonimbus cloud, e.g., FEW015CB VV "Vertical visibility" = clouds cannot be seen because of fog or heavy precipitation, so vertical visibility is given instead.
A Level 1 of 4 threat also extends from central Texas to northern Arkansas, including Dallas. Most of Little Rock has a high likelihood of viewing the eclipse, according to the NWS office in the city.
d. A VFR CLOUDS/WX section i. Contains a 12-hour specific forecast, followed by a 6-hour categorical outlook; ii. Broken down into geographical areas, and/or states; iii. Describes cloud and weather affecting VFR flight operations, including precipitation, thunderstorms, and sustained surface winds 20 Kts or greater. Also includes visibility ...
The clouds were broken at 2,000 ft (610 m) AMSL with tops at 4,000 ft (1,200 m) and an overcast layer at 11,000 ft (3,400 m) AMSL. The temperature is −14 degrees Celsius and the winds are from the northeast (030 degrees true) at 45 kn (83 km/h).