Aviation Weather Forecasts and Reporting

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Questions and Answers

What values are used for Winds Aloft Forecasts?

True direction and knots.

What does UA stand for on PIREP?

Standard

What does UUA stand for on PIREP?

Urgent

When the term 'light and variable' is used in reference to a Winds Aloft Forecast, what is the coded group and windspeed?

9900 and less than 5 knots. Signup and view all the answers

Which in-flight advisory would contain information on severe icing not associated with thunderstorms?

SIGMET Signup and view all the answers

Radar weather reports are of special interest to pilots because they indicate?

Location of precipitation along with type, intensity, and cell movement of precipitation. Signup and view all the answers

To obtain current information regarding cloud tops, icing, and turbulence, what should be checked?

Low-Level Significant Weather Prog Charts. Signup and view all the answers

The Terminal Aerodrome Forecast (TAF) is?

Specific to an airport. Signup and view all the answers

How are Significant Weather Prognostic Charts best used by a pilot?

For determining areas to avoid (freezing levels and turbulence). Signup and view all the answers

To determine the freezing level and areas of probable icing aloft, the pilot should refer to the?

Inflight Aviation Weather Advisories. Signup and view all the answers

The information in a METAR is?

Sequential following a prescribed format. Signup and view all the answers

What is indicated when a current CONVECTIVE SIGMET forecasts thunderstorms?

Thunderstorms obscured by massive cloud layers. Signup and view all the answers

What information is contained in a CONVECTIVE SIGMET?

Tornadoes, embedded thunderstorms, and hail 3/4 inch or greater in diameter. Signup and view all the answers

Of what value is the Weather Depiction Chart to the pilot?

For determining general weather conditions on which to base flight planning. Signup and view all the answers

For aviation purposes, ceiling is defined as the height above the Earth's surface of the?

Lowest broken or overcast layer or vertical visibility into an obscuration. Signup and view all the answers

The most accurate part of a forecast occurs?

At the beginning of the forecast period. Signup and view all the answers

What is the difference between Airmet and Sigmet?

SIGMETs are significant weather warnings for all aircraft, Airmets are significant weather at lower intensities. Signup and view all the answers

Radar weather reports are of special interest to pilots because they indicate (repeat question)?

Location of precipitation along with type, intensity, and cell movement of precipitation. Signup and view all the answers

Study Notes

Winds Aloft Forecasts

Utilizes true direction and knots for accuracy.
'Light and variable' indicates a coded group of 9900 with wind speed under 5 knots.

PIREP Abbreviations

UA represents "Standard" in Pilot Weather Reports.
UUA stands for "Urgent," indicating immediate attention is needed.

In-Flight Advisories

SIGMET reports severe icing not associated with thunderstorms.
METAR provides sequential weather data following a specific format.

Weather Reporting and Charts

Radar weather reports inform pilots about precipitation's location, type, intensity, and cell movement.
Low-Level Significant Weather Prog Charts are used for current cloud tops, icing, and turbulence information.
Weather Depiction Chart aids pilots in determining general weather conditions for flight planning.

Terminal and Significant Weather Forecasts

Terminal Aerodrome Forecast (TAF) is airport-specific, focusing on localized weather predictions.
Significant Weather Prognostic Charts are useful for identifying areas to avoid concerning freezing levels and turbulence.
CONVECTIVE SIGMET warns of thunderstorms, including obscured conditions and potential tornadoes, embedded thunderstorms, and hail of ¾ inch or greater diameter.

Definitions and Observations

For aviation, "ceiling" is the height of the lowest broken or overcast layer or the vertical visibility into an obscuration.
The most reliable part of any weather forecast lies at the beginning of the forecast period.

Airmet vs. Sigmet

Sigmet represents significant weather warnings applicable to all aircraft, while Airmet warnings indicate significant weather at lower intensities.

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Description

This quiz covers essential topics related to aviation weather forecasts, including Winds Aloft Forecasts, PIREP abbreviations, and in-flight advisories. It also explores weather reporting charts and terminal weather forecasts, offering pilots crucial information for safe flight planning and operations.