Ceiling trap
BKN, OVC, or VV near a minimum
Name the lowest ceiling, category, cloud clearance, and whether this is legal or smart for the mission.
METAR Decoder
Paste any METAR weather report and get an instant plain-English breakdown of every field, plus flight category.
Cockpit weather backupPortable ADS-B receiverA practical next step if METARs, TAFs, radar, and traffic matter in the airplane.Check AmazonBuying gear?Compare ADS-B weather receiversSentry, Stratus, Garmin, and portable cockpit weather options.Open guideStudying weather?Aviation weather handbookUse the decoder for one report, then learn the patterns behind it.Search AmazonExam risk?Drill METAR/TAF traps30-day Instrument weather practice for written and checkride gaps.$9.99 access
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Try an example:
Weather study path
Turn this METAR into a complete weather decision
Decode the report, then connect it to forecast timing, density altitude, pilot reports, and area hazards.
Read a METARCurrent airport weather, decoded left to right.Decode a TAFBuild a forecast timeline from FM, TEMPO, and PROB groups.Calculate density altitudeTranslate hot-and-high weather into performance risk.Interpret PIREPsReality-check forecasts with pilot reports on your route.Interpret AIRMETs and SIGMETsUnderstand the regional hazard advisories that change plans.
Daily weather mastery loop
Do one cockpit weather rep, not one random decode.
Paste a report, decode it, then turn the result into one short study rep.
Brief
Decode the report
Translate the raw METAR into ceiling, visibility, wind, pressure, weather, and flight category.
Decide
Write the go/no-go call
Name the real decision: VFR, marginal VFR, IFR, alternate needed, delay, or no-go.
Repair
Drill the weak link
Turn the confusing part into one quiz set, one tutor question, and one flashcard review.
Repeat
Come back tomorrow
Weather judgment compounds when you run the same cockpit scan for a new airport every day.
7-day weather decision path
What to practice after this decode
Use this as a repeatable cockpit workflow: current report, forecast trend, performance, wind, fuel, traps, then one new airport.
Day 1Decode one real METARExtract ceiling, visibility, wind, altimeter, temperature/dewpoint spread, and present weather.Decode reportDay 2Add the forecast timelineCompare the current report against the TAF so the decision has trend, timing, and alternate context.Decode TAFDay 3Check performance riskConnect temperature, pressure, and field elevation to density altitude before calling the weather good.Check density altitudeDay 4Brief wind and runway limitsTurn wind direction and speed into headwind, tailwind, and crosswind before taxi or launch.Check crosswindDay 5Plan fuel and alternatesUse the report as a trigger to verify approach minima, fuel reserves, alternate weather, and diversion margin.Check fuelDay 6Drill a marginal-weather trapPractice the exact failure mode: legal but uncomfortable, VFR into MVFR, low ceiling, gusts, or fog trend.Drill weather trapsDay 7Repeat with a new airportCome back with a different station and make the same go/no-go call without changing the workflow.Start next rep
Saved weather trap bank
Make the decoder remember what almost tricked you.
A one-time decode is useful. A saved trap bank is what brings a pilot back tomorrow: ceiling, visibility, gusts, spread, weather codes, pressure, forecast trend, and alternates.
0
traps saved
0
weak signals
Visibility trap
3SM, BR, FG, HZ, or M/P visibility groups
Separate legal visibility from practical margin and identify mist/fog deterioration risk.
Gust / crosswind trap
Gust factor, VRB wind, or runway mismatch
Turn wind into a runway decision before treating the METAR as safe.
Temp/dewpoint spread trap
Spread 0-3C, mist, fog, or night cooling
Use the spread as an early warning, not trivia.
Weather code trap
TS, SH, FZ, RA, SN, SQ, or VC groups
Translate the code and say what operational hazard it creates.
Pressure / density trap
High temp, low pressure, hot-and-high field
Connect altimeter and temperature to performance, not only the weather category.
TAF trend trap
METAR looks fine but the forecast may not
Compare current weather with timing, TEMPO, FM, and PROB groups.
Alternate / escape trap
Marginal destination, low ceiling, low visibility, or fuel pressure
Turn the decoded report into an alternate and fuel decision.
20-rep repair exam
Start with the four highest-frequency weather traps
The point is not to read another explanation. It is to make 20 small go/no-go calls until the trap becomes automatic.
Rep 1: Ceiling trap
Find the lowest BKN/OVC/VV layer and write the flight category. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 2: Visibility trap
Explain BR versus FG and the visibility threshold that separates them. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 3: Gust / crosswind trap
Name one personal minimum that should tighten when gusts appear. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 4: Temp/dewpoint spread trap
Tie the spread to Part 107 or PPL go/no-go margin. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 5: Ceiling trap
Find the lowest BKN/OVC/VV layer and write the flight category. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 6: Visibility trap
Explain BR versus FG and the visibility threshold that separates them. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 7: Gust / crosswind trap
Name one personal minimum that should tighten when gusts appear. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 8: Temp/dewpoint spread trap
Tie the spread to Part 107 or PPL go/no-go margin. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 9: Ceiling trap
Find the lowest BKN/OVC/VV layer and write the flight category. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 10: Visibility trap
Explain BR versus FG and the visibility threshold that separates them. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 11: Gust / crosswind trap
Name one personal minimum that should tighten when gusts appear. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 12: Temp/dewpoint spread trap
Tie the spread to Part 107 or PPL go/no-go margin. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 13: Ceiling trap
Find the lowest BKN/OVC/VV layer and write the flight category. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 14: Visibility trap
Explain BR versus FG and the visibility threshold that separates them. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 15: Gust / crosswind trap
Name one personal minimum that should tighten when gusts appear. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 16: Temp/dewpoint spread trap
Tie the spread to Part 107 or PPL go/no-go margin. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 17: Ceiling trap
Find the lowest BKN/OVC/VV layer and write the flight category. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 18: Visibility trap
Explain BR versus FG and the visibility threshold that separates them. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 19: Gust / crosswind trap
Name one personal minimum that should tighten when gusts appear. Use today's station and the decoded UNKNOWN category as your starting point.
Rep 20: Temp/dewpoint spread trap
Tie the spread to Part 107 or PPL go/no-go margin. Use today's station and the decoded UNKNOWN category as your starting point.
Weather study kit
If you are using this decoder to prep for flights or exams, these are the practical references and cockpit tools that match the workflow.
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Start hereASA E6B Flight ComputerUseful for pressure altitude, density altitude, winds, and checkride weather math.Check on AmazonUpgrade pickAviation Weather HandbookA desk reference for decoding METARs, TAFs, fronts, clouds, icing, and thunderstorms.Check on Amazon
ASA E6B Flight ComputerUseful for pressure altitude, density altitude, winds, and checkride weather math.View on AmazonAviation Weather HandbookA desk reference for decoding METARs, TAFs, fronts, clouds, icing, and thunderstorms.View on AmazonASA Tri-Fold VFR KneeboardKeeps copied ATIS, clearances, and weather notes organized in the cockpit.View on AmazonFAR/AIM Current EditionPairs weather decoding with the rules and AIM guidance pilots actually test on.View on Amazon
METAR Weather Abbreviation Reference
Common weather codes used in METAR reports. Combine intensity prefixes (+/-) with weather phenomena (e.g., +TSRA = heavy thunderstorm with rain).
| Code | Meaning |
|---|---|
RA | Rain |
SN | Snow |
FG | Fog |
BR | Mist |
HZ | Haze |
TS | Thunderstorm |
SH | Showers |
DZ | Drizzle |
GR | Hail |
GS | Small Hail |
FZ | Freezing |
PL | Ice Pellets |
IC | Ice Crystals |
FU | Smoke |
VA | Volcanic Ash |
SQ | Squall |
+ | Heavy |
- | Light |
VC | Vicinity |
BL | Blowing |
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Build the weather habit
Decode it, brief it, then keep the right cockpit references nearby.
Most METAR mistakes happen after translation: missed trend, weak alternate logic, or no written plan. These are the practical next tools pilots pair with weather study and cockpit decisions.
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Get the cockpit weather scan checklist
Save the quick METAR, TAF, NOTAM, alternate, and fuel-risk scan pilots use before turning a weather report into a go/no-go decision.
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Cockpit weather kit
Turn a decoded METAR into a real go/no-go briefing
The decoder tells you what the report says. The next step is building the habit pilots actually use: current weather, forecast trend, chart context, alternates, fuel risk, and a written decision before the airplane moves.
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Aviation weather textbook
ASA Aviation Weather / FAA Weather Handbook
Use this when the decoder gives you the plain-English answer but you want to understand the why behind clouds, fronts, icing, and thunderstorms.
Find weather books on AmazonChart legend backup
FAA Aeronautical Chart User's Guide
Pair METAR and TAF decoding with chart symbols, obstacles, airspace, and alternate planning details.
Find chart guides on AmazonIn-flight weather feed
Portable ADS-B receiver
For cockpit weather awareness after preflight: NEXRAD, METARs, TAFs, traffic, and backup attitude depending on the device.
Compare receivers on AmazonBriefing workflow
Pilot kneeboard or cockpit notebook
Keep decoded weather, ATIS, alternates, fuel notes, and minimums in one place before taxi.
See kneeboards on AmazonFrequently Asked Questions
What does METAR stand for?
METAR stands for Meteorological Aerodrome Report (from French: Météorologique Aviation Régulière). It is a standardized format for reporting weather at airports, issued every hour or when conditions change significantly (SPECI).
How do you read wind in a METAR?
Wind is reported as a 5-digit group: first 3 digits are direction (magnetic), last 2 are speed in knots. For example, 27015KT means wind from 270° at 15 knots. Gusts are shown with G (e.g., 27015G25KT).
What does VV mean in a METAR?
VV stands for Vertical Visibility, used when the sky is obscured (fog, heavy precipitation). VV003 means vertical visibility is 300 feet. This indicates you cannot see the sky — only straight up to 300 feet.
What is the difference between METAR and TAF?
METAR reports current weather conditions at an airport. TAF (Terminal Aerodrome Forecast) predicts weather for the next 24-30 hours. Both use similar notation but TAFs include forecast periods and expected changes.
How often are METARs updated?
Routine METARs are issued every hour (usually at 55 minutes past the hour). Special METARs (SPECI) are issued when conditions change significantly — such as visibility dropping below minimums or wind shifting.
How to Read a METAR
A METAR (Meteorological Aerodrome Report) is a standardized format for reporting weather observations at airports. Every METAR follows the same structure:
TYPE STATION DATE/TIME WIND VISIBILITY WEATHER CLOUDS TEMP/DEW ALTIMETER RMK- Station — 4-letter ICAO code (e.g., KJFK, EGLL, KLAX)
- Date/Time — DDHHMMz format in UTC (e.g., 121856Z = 12th day at 18:56 UTC)
- Wind — Direction (3 digits) + speed (2 digits) in knots, with optional gusts (e.g., 31015G25KT)
- Visibility — In statute miles (10SM) for US, or meters (9999 = 10km+) for ICAO
- Weather — Phenomena codes like RA (rain), SN (snow), FG (fog), TS (thunderstorm)
- Clouds — Coverage + height in hundreds of feet AGL (e.g., SCT040 = scattered at 4,000 ft)
- Temp/Dewpoint — In Celsius, M prefix for negative (e.g., M02/M17 = -2°C / -17°C)
- Altimeter — A followed by inHg (A3042) or Q followed by hPa (Q1024)
- Remarks — Everything after RMK contains additional meteorological details
Pilots use METARs to determine flight category (VFR, MVFR, IFR, LIFR) based on ceiling height and visibility. This is critical for go/no-go decisions, approach planning, and alternate airport selection.
Weather and cockpit planning guides
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Decode terminal aerodrome forecasts after checking the current METAR.
Aviation Weather Guide
Clouds, fronts, icing, thunderstorms, and real go/no-go decisions.
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