OM Part C AIRFIELD BRIEFINGS Section 2 Page |1 ... - Astra Airlines

OM
Part C
AIRFIELD BRIEFINGS
Section 2
P a g e | 8
Light rain is the most severe precipitation observed during 31% of those days with precipitation. It is
most likely around September 8, when it is observed during 31% of all days.
Light snow is the most severe precipitation observed during 26% of those days with precipitation. It is
most likely around January 5, when it is observed during 34% of all days.
Thunderstorms are the most severe precipitation observed during 25% of those days with
precipitation. They are most likely around July 12, when it is observed during 46% of all days.
Moderate snow is the most severe precipitation observed during 16% of those days with precipitation.
It is most likely around December 22, when it is observed during 20% of all days.
During the warm season, which lasts from May 11 to September 13, there is a 60% average chance
that precipitation will be observed at some point during a given day. When precipitation does occur it
is most often in the form of thunderstorms ( 54% of days with precipitation have at worst
thunderstorms) and light rain (42%).
During the cold season, which lasts from November 28 to February 24, there is a 48% average chance
that precipitation will be observed at some point during a given day. When precipitation does occur it
is most often in the form of light snow (63% of days with precipitation have at worst light snow) and
moderate snow (34%).
Snow
The likelihood of snow falling is highest around December 22, occurring in 53% of days. The season
in which it is relatively likely for snow to fall spans from October 19 to April 17
Wind
Over the course of the year typical wind speeds vary from 0.0 m/s to 6.1 m/s (calm to moderate
breeze), rarely exceeding 10.6 m/s (fresh breeze).
The highest average wind speed of 3.3 m/s (light breeze) occurs around May 7, at which time the
average daily maximum wind speed is 6.1 m/s (moderate breeze).
The lowest average wind speed of 1.4 m/s (light air) occurs around January 16, at which time the
average daily maximum wind speed is 2.3 m/s (light breeze).
GROUND FACILITIES
Mass migrations of birds across TMA are not observed.
Flights of birds may be observed at heights up to 150 m over Krasnoyarsk reservoir from May to
October.
Hovering of eagles and hawks is observed up to heights 1500-3000 m over the mountains in the
northern part of the aerodrome area in summer period. The concentration of small birds is observed
over Kalinin settlement adjoining the territory of the aerodrome on the north-eastern and eastern
sides. Migration of birds across the airfield takes place in the vicinity of the runway centre in evening
and morning hours at a height up to 1000 m.
During mentioned periods the pilots are recommended to switch on landing lights when flying in the
aerodrome area, during take-off, approach-to-land and also during climbing and descending.
ATS unit personnel shall provide a visual control, assess the ornithological situation at the aerodrome
and inform the crews about the concentrations and migrations of birds.
© by Astra Airlines Issue: 2 Oct., 2010 Revision No. 3 Feb. 2012