Pilot Institute

JANUARY 1, 2025

Altimeter Pressure (A2990) The next part of the report indicates the local atmospheric pressure, measured in inches of mercury (inHg). Pilots use this value to adjust their altimeters, ensuring they display altitude as close to mean sea level (MSL) as possible. Its also possible to report negative temperatures with an M prefix.

AGL 98

AGL Turbulence Weather UTC 98

Pilot Institute

NOVEMBER 5, 2024

Altimeter Setting The altimeter setting gives you pressure information in inches of mercury or hectopascals. For accurate altitude readings, you should set your aircraft’s altimeter to match the local altimeter setting. 011955Z : The date and time of issuance (first day of the month at 19:55 UTC).

Altimeter 52

Altimeter Weather Wind Shear Runway 52

Pilot Institute

MAY 25, 2024

The start and end dates and times are coded in YYMMDDttt format (UTC time). B) 2106231700 is the start time and date in UTC. C) 2106232300 is the end time and date in UTC. High-pressure conditions decrease altimeter accuracy, affecting terrain clearance and aircraft spacing. Each subject has its own FAA keyword.

NOTAMs 52

NOTAMs UTC Runway Federal Aviation Regulations 52

Learn to Fly

MARCH 12, 2024

The last four digits are the time of the METAR/SPECI, which is always given in coordinated universal time (UTC). A “Z” is appended to the end of the time to denote the time is given in Zulu time (UTC) as opposed to local time. The altimeter setting is reported as inches of mercury (inHg) in a four-digit number group.

Weather 40

Weather Knot UTC Ceiling 40

AeroSavvy

JANUARY 16, 2024

Here’s the decoded observation from the above METAR: KLOU Decoded Observation: Time Stamp: 4th day of January, 1653z (UTC Time) Wind: 350 ° at 6 knots Surface visibility: 10 statute miles Clouds: Broken cloud ceiling at 3,800 ft Temp / Dew Point: 3 ° C / -5 ° C Altimeter: 3033 inHg (US reports inches of mercury; most countries use millibars) (..)

Weather 52

Weather Ceiling Knot Visual Flight Rules 52