Sport Flight Instructor Helicopter - Simplified Flight Controls › III. Preflight Preparation › Task C. Weather Information

FH.III.C.K3b

Knowledge

Meteorology applicable to the departure, en route, alternate, and destination under visual flight rules (VFR) in Visual Meteorological Conditions (VMC), including expected climate and hazardous conditions such as:

Wind (e.g., windshear, mountain wave, factors affecting wind, etc.)

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Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

Aviation Weather Handbook p. 3-16
3 Overview of Aviation Weather Information › 3.4.2 Summaries of Specific Weather Information Contained in Various Weather Products › 3.4.2.2 Products with Wind Information
Medium-Level SIGWX G A jet stream axis with a wind speed aloft of more than 80 knots is depicted with double hatched lines identifying 20-knot speed changes. Global forecast of a jet stream axis with a wind speed ... aloft of more than 80 knots is depicted with double hatched lines identifying 20-knot speed changes. WAFS G Winds aloft are issued at select FLs and are provided in chart and grid point formats. Wind speed and direction (true…
Aeronautical Information Manual p. 4-3-13
Chapter 4. Air Traffic Control › Section 3. Airport Operations › 4-3-7. Low Level Wind Shear/Microburst Detection Systems
will be reduced as necessary to obtain the required lengths to the extent practicable. 4-3-7. Low Level Wind Shear/Microburst Detection Systems Low Level Wind Shear Alert System (LLWAS), Terminal Doppler Weather Radar (TDWR), Weather Systems Processor ... Integrated Terminal Weather System (ITWS) display information on hazardous wind shear and microburst activity in the vicinity of an airport to air traffic controllers who relay this information to pilots. a. LLWAS provides wind shear alert and gust front information…
Aviation Weather Handbook p. 3-27
3 Overview of Aviation Weather Information › 3.4.2 Summaries of Specific Weather Information Contained in Various Weather Products › 3.4.2.13 Products with Mountain Obscuration Information
Products with Mountain Obscuration Information Table 3-16. Weather Element: Mountain Obstruction Type: text (T), graphic (G), image (I), voice (V) May be included in RMK section at some mountain airports. At times it may be inferred or implied ... reporting of clouds at ASOS/AWOS located in mountain passes. Weather Camera I Mountain obscuration may be visible on the camera. Advisories AIRMET T, G AIRMET Sierra are issued when widespread mountain obstruction is occurring or expected to occur. Forecasts Aviation…
Pilot's Handbook of Aeronautical Knowledge p. 14-20
Chapter 14: Airport Operations › Wind Direction Indicators
Wind Direction Indicators It is important for a pilot to know the direction of the wind. At facilities with an operating control tower, this information is provided by ATC. Information may also be provided by FSS personnel either located ... receive and broadcast on this frequency. When none of these services is available, it is possible to determine wind direction and runway in use by visual wind indicators. A pilot should check these wind indicators even when information is provided…
Pilot's Handbook of Aeronautical Knowledge p. 12-10
Chapter 12: Weather Theory › Wind and Currents › Low-Level Wind Shear
flows down the leeward side of the mountain, the air follows the contour of the terrain and is increasingly turbulent. This tends to push an aircraft into the side of a mountain. The stronger the wind, the greater the downward ... pressure and turbulence become. Figure 12-16. Turbulence in mountainous regions. Due to the effect terrain has on the wind in valleys or canyons, downdrafts can be severe. Before conducting a flight in or near mountainous terrain, it is helpful…