Pilot Institute

MARCH 6, 2025

AGL Above Ground Level AGL is simply a way to tell the basis from which any given height or altitude is measured. Simply put, 400 feet AGL means that the 400 feet is measured from the underlying ground surface above the specific airspace. This is as opposed to other altitude measurements, such as AMSL or above mean sea level.

Pilot 52

Pilot Weather Air Traffic Control NOTAMs 52

Pilot Institute

NOVEMBER 5, 2024

Cloud ceilings below 1,500 feet or cumulonimbus clouds can trigger a SPECI. A sudden wind shift, a 10-knot or greater speed increase, a 45-degree or more direction change, or gusts exceeding limits may also cause a SPECI. Thunderstorms can also bring wind shear and lightning. A2992 : Altimeter setting of 29.92

Altimeter 52

Altimeter Weather Wind Shear Runway 52

Air Facts

APRIL 24, 2024

We had light winds, good visibility, full cloud cover, and ample ceiling heights. What was changing, however, wasn’t the visibility, or ceiling heights, or wind—at least not perceivably. Then, descending through just a few hundred feet AGL, and a few hundred yards from the end of the runway, the turbulence diminished.

Turbulence 52

Turbulence Wind Shear Final Approach Ceiling 52