General Aviation Pilot’s Guide to Preflight Weather Planning, Weather Self-Briefings, and Weather Decision Making(7)_通航信息_通航_通用航空

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Here’s how it works. Suppose you want to make a flight from Cincinnati Municipal Airport (KLUK) to Port Columbus Airport in Columbus, Ohio (KCMH). You want to depart KLUK around 1830Z and fly VFR at 5,500 MSL. Your estimated time en route (ETE) is approximately one hour. Your weather briefing includes the following information:
METARs:
KLUK 261410Z 07003KT 3SM -RA BR OVC015 21/20 A3001 KDAY 261423Z 14005KT 3SM HZ BKN050 22/19 A3003 KCMH 261351Z 19005KT 3SM HZ FEW080 BKN100 OVC130 22/17 A3002

TAFs
KLUK 261405Z 261412 00000KT 3SM BR BKN015 TEMPO 1416 2SM -SHRA BR   FM1600 14004KT 5SM BR OVC035 TEMPO 1618 2SM -SHRA BR BKN015   FM1800 16004KT P6SM BKN040   FM0200 00000KT 5SM BR BKN025 TEMPO 0912 2SM BR BKN018
KDAY 261303Z 261312 06003KT 5SM BR SCT050 OVC100 TEMPO 1315 2SM -RA BR BKN050 FM1500 15006KT P6SM BKN050   TEMPO 1519 4SM -SHRA BR BKN025   FM1900 16007KT P6SM BKN035   FM0200 14005KT 5SM BR BKN035 FM0600 14004KT 2SM BR BKN012
KCMH 261406Z 261412 19004KT 4SM HZ SCT050 BKN120   FM1800 17006KT P6SM BKN040   TEMPO 1922 4SM -SHRA BR   FM0200 15005KT 5SM BR BKN035 FM0700 14004KT 2SM BR BKN012

WINDS ALOFT
3000 6000 9000 12000 15000 18000 21000 24000 27000 CMH 1910 2108+15 2807+10 2712+05 2922-07 2936-17 294532 294540 313851 CVG 2310 2607+16 2811+11 2716+06 3019-05 2929-16 293430 293240 293652

Remember that you have the option of getting this information in “plain English” format if you prefer not to decode. Whichever format you select, the first step is to look at your weather data in terms of three specific ways that weather can affect your flight: turbulence, visibility, and aircraft performance.
Organize the information into tables such
as the one below, (see Appendix 5 for blank forms). This kind of format allows you to see and make “apples-to-apples” comparisons more easily. The column headings in the top row – arranged to match the order in which the briefing information is presented – can help you
quickly identify the specific weather hazard(s) you might face on this trip. You may also find it helpful to convert Zulu (UTC) times to local time, and to write note expected ETAs for each waypoint on your flight plan.
Using the Cincinnati (KLUK) to Columbus (KCMH) trip as example:
CURRENT CONDITIONS
Turbulence Ceiling & Visibility Visibility & Performance Trends
Place Time Wind Visibility Weather Ceiling Temp/Dewpt Altimeter
KLUK 1410Z 07003KT 3SM RA, BR OVC015 21/20 A3001
KDAY 1432Z 14005KT 3SM HZ BKN050 22/19 A3003
KCMH 1351Z 19005KT 3SM HZ FEW080, OVC130 22/17 A3002
　
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