AVIATION SIGNIFICANT WEATHER
&
WIND ALOFT AND TEMPERATURES CHARTS

Fnobre / 27May2012
AVIATION SIGNIFICANT WEATHER CHARTS
While weather forecasts are not 100 percent accurate, meteorologists, through careful
...
AVIATION SIGNIFICANT WEATHER CHARTS
The following phenomena are shown on the charts:
• Tropical Storms
• Moderate or sever...
AVIATION SIGNIFICANT WEATHER CHARTS
Tropical storm is a storm system characterized by a low-pressure center and numerous
t...
AVIATION SIGNIFICANT WEATHER CHARTS
Troposphere is one of the lowest layers of the Earth's atmosphere, it is located right...
SIGNIFICANT WEATHER CHART DECODE

Fnobre / 27May2012
SIGNIFICANT WEATHER CHART DECODE

Fnobre / 27May2012
WIND & TEMPERATURE CHARTS

Fnobre / 27May2012
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Operations sig weather and winds aloft charts

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Operations sig weather and winds aloft charts

  1. 1. AVIATION SIGNIFICANT WEATHER & WIND ALOFT AND TEMPERATURES CHARTS Fnobre / 27May2012
  2. 2. AVIATION SIGNIFICANT WEATHER CHARTS While weather forecasts are not 100 percent accurate, meteorologists, through careful scientific study and computer modeling, have the ability to predict the weather patterns, trends, and characteristics with increasing accuracy. These predictions could be showed as Aviation significant weather (SIGWX) charts that are issued by many centers around the world forecast ing the expected weather in the airspace Aviation SIGWX charts are usually issued to cover three broad 'operating levels' in the troposphere / lower stratosphere: • low-level charts (roughly below 10000ft); • medium / high level charts (roughly 10000ft to 45000ft); and • high level charts (roughly above 25000ft UP TO 63000ft). In general, the lower the level, the less area a particular chart will cover; they are generally issued every 6 hours, with a fixed validity time 00, 06, 12 or 18 UTC, bearing in mind that the all validity of the chart will be 3hours before and 3 hours before the fixed validity. Fnobre / 27May2012
  3. 3. AVIATION SIGNIFICANT WEATHER CHARTS The following phenomena are shown on the charts: • Tropical Storms • Moderate or severe turbulence, including clear air turbulence (CAT) • Moderate or severe icing • Surface fronts • Cumulonimbus (CB) cloud associated with thunderstorms and with any of the above • Non-convective cloud associated with in-cloud moderate or severe turbulence or icing • Jet streams (locations, altitude, strength, variations.) • Volcanic eruptions • Tropopause heights ,(including 'highs' and 'lows'.) • Radioactive material Fnobre / 27May2012
  4. 4. AVIATION SIGNIFICANT WEATHER CHARTS Tropical storm is a storm system characterized by a low-pressure center and numerous thunderstorms that produce strong winds and heavy rain Clear air turbulence (CAT) is the turbulent movement of air masses in the absence of any visual cues such as clouds, and is caused when bodies of air moving at widely different speeds meet, these areas are showed as dashed lines enclosing areas of similar turbulence structure (intensity/height) ... base/top of layer (standard FL notation). In aviation, Icing conditions are those atmospheric conditions that can lead to the formation of water ice on the surfaces of an aircraft, Jet streams are fast flowing, narrow air currents found in the atmosphere they are showed on these charts as a bold arrow showing wind location, altitude, strength and variations. Fnobre / 27May2012
  5. 5. AVIATION SIGNIFICANT WEATHER CHARTS Troposphere is one of the lowest layers of the Earth's atmosphere, it is located right above the planetary boundary layer, and is the layer in which most weather phenomena take place. The troposphere extends upwards from right above the boundary layer, and ranges in height from an average of 9 km (30,000 ft) at the poles, to 17 km (56,000 ft) at the Equator, tropopause is the Troposphere bounderies btn estratosphere. Tropopause is showed as spot numbers in rectangular boxes (standard FL notation) ... boxes with upward pointing arrow denote tropopause highs ('domes') ... boxes with downward pointing arrow denote tropopause lows (depression) Fnobre / 27May2012
  6. 6. SIGNIFICANT WEATHER CHART DECODE Fnobre / 27May2012
  7. 7. SIGNIFICANT WEATHER CHART DECODE Fnobre / 27May2012
  8. 8. WIND & TEMPERATURE CHARTS Fnobre / 27May2012

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