How do I check KJFK METAR, TAF, ATIS and forecasts?

For KJFK flight planning, retrieve the latest METAR and TAF from an official aviation-weather or approved briefing source, review broader New York-area forecasts and hazards, then obtain JFK’s current ATIS shortly before departure or arrival. Check issue and validity times, runway-relevant winds, visibility, ceiling, precipitation and pressure; never treat ATIS as a forecast.

In our Aviation & Real-World Flying coverage, KJFK means John F. Kennedy International Airport’s four-letter ICAO identifier. Aviation weather systems normally expect KJFK, whereas entering only JFK in a general weather service may return non-aviation information.

What does each KJFK weather product tell you?

METAR, TAF, ATIS and regional forecasts answer different questions, so a proper briefing uses all four rather than choosing one.

How do I check KJFK weather in the right order?

Start with the planned UTC time, examine observed and forecast terminal weather, add the regional picture, and obtain ATIS last because it is the most operationally immediate source.

1. Set the correct date and time. Convert departure and arrival times to UTC, shown as Z in aviation reports. In 141651Z, the observation was made on the 14th at 1651 UTC. A report from the wrong UTC day is a frequent source of bad planning.
2. Retrieve the latest KJFK METAR. Check whether a newer special report, marked SPECI, has replaced the routine observation. Read wind and gusts, visibility, present weather, the lowest broken or overcast layer or vertical visibility, temperature/dew point and altimeter setting. Our field-by-field METAR decoding guide explains groups such as 22015G25KT, 10SM and A2992.
3. Read the TAF period covering the operation. Verify both its issue time and validity window, then find the section containing the planned departure or arrival. Pay particular attention to FM and TEMPO groups. If the ETA sits close to a forecast change boundary, plan for either condition rather than assuming the favourable one will prevail.
4. Add the regional weather picture. Review fronts, precipitation and radar trends, thunderstorms, icing, turbulence, winds aloft and active aviation advisories. A TAF only describes the terminal area; our method for building a complete en-route weather briefing covers the information needed between departure and KJFK.
5. Obtain the latest ATIS. Use the ATIS frequency listed in current airport data, or the aircraft’s datalink service where fitted. A large airport may provide separate departure and arrival information. Copy the identifier, observation time, wind, visibility, cloud, altimeter, approach and runways, using our explanation of what to extract from an ATIS broadcast as a practical reference.
6. Reconcile the reports instead of averaging them. Identify which product covers the required place and time, then apply aircraft limits, approach minima, fuel and alternate requirements, operator rules and personal minima. For runway calculations, account for the different wind-direction references used by coded reports and ATIS.

Why do the KJFK METAR, TAF and ATIS disagree?

Small differences are normal because the products have different issue times, purposes, areas and wind references; a large discrepancy usually indicates stale data, a rapid weather change or a simulator timing mismatch.

• Observation time: The ATIS may contain weather from a different minute than the METAR on a briefing display. Compare timestamps and information codes before deciding that one is wrong.
• Observation versus forecast: A METAR reports what was observed, while a TAF states what is expected. A temporary shower or fog bank can make the observation worse than the prevailing forecast without invalidating the entire TAF.
• Different coverage: The TAF applies to KJFK’s immediate terminal area. A general New York forecast, regional radar image or nearby airport observation does not necessarily describe conditions over JFK’s runway complex.
• Wind reference: Coded METAR and TAF wind directions are referenced to true north. ATIS and tower-reported winds in the United States are normally magnetic. This matters when the crosswind is close to an aircraft limit.
• Updated products: Look for an amended TAF and a newer SPECI. Cached briefing pages, saved dispatch documents and old ATIS recordings can remain visible after conditions have changed.

Which KJFK conditions can change the flight plan?

At KJFK, runway wind, low cloud and visibility, convection, winter contamination and forecast timing can alter the runway, approach, alternate, fuel requirement or the decision to depart.

• Wind and gusts: Calculate headwind and crosswind components against the aircraft’s limits and performance data. Do not infer the active runway from wind alone; traffic flow, noise procedures, closures and airport operations also influence KJFK’s runway configuration.
• Ceiling and visibility: Compare forecast conditions with the intended approach and applicable alternate rules. In a METAR, scattered cloud is not a ceiling; the ceiling is the lowest broken or overcast layer, or reported vertical visibility.
• Thunderstorms: Check timing, movement and wider convective advisories rather than relying on a single airport forecast. Reroutes, holding and missed approaches may require extra fuel even when the TAF remains above landing minima.
• Snow, freezing precipitation and contamination: Consider de-icing, runway condition reports, braking action, taxi delays and departure performance. A TAF can forecast precipitation, but it does not provide the live runway surface condition.
• Low-level wind shear and turbulence: Examine any wind-shear group in the TAF and the broader advisories. The surface METAR alone cannot describe the wind through the arrival or departure path.

No single weather value determines whether a flight is acceptable. The decision must use the applicable regulations and operating procedures, aircraft performance and limitations, available approaches, alternates, fuel margin and pilot proficiency.

Using KJFK ATIS in a flight simulator

For simulator operations, use weather and ATIS from the same environment; mixing real-world ATIS with modelled simulator weather commonly produces the wrong runway, altimeter setting and wind.

• Live-weather flight: Synchronise the simulator’s date and UTC time, enable live weather, allow it to load, and then compare its KJFK conditions with the latest report. Forecast blending and update delays mean an exact match is not guaranteed.
• Simulator ATC: Follow the simulator-generated ATIS when using its built-in ATC because that message normally reflects the runway and pressure setting selected by the simulation.
• Real-world procedure practice: If exact replication matters, set the simulator manually from the chosen METAR and use the real TAF only to decide how the scenario should develop. Record the report time so later observations do not become mixed into the exercise.
• Historical or custom weather: Do not compare it with a live ATIS. Use the ATIS generated for that scenario, or manually brief the runway, pressure and approach that match the configured conditions.