VFR weather and regional QNH for Czechia

Regional QNH for LKAA

The lowest forecast QNH for the LKAA region is the setting used below the transition altitude when flying VFR outside a controlled aerodrome's circuit — it is what keeps your altimeter conservative against terrain across the whole region rather than accurate at one field. VFRAID shows the current MET-broadcast value and the period it is valid for, on the home page and here.

The same value is available from any ATS unit on request. This site reproduces the published broadcast value for planning convenience; it is not a substitute for the broadcast or for an ATS unit.

Forecasts, winds and daylight

Station forecasts and winds aloft cover the altitudes VFR traffic actually uses, so a headwind that turns a two-hour leg into a fuel decision shows up during planning. The precipitation radar gives the shower and frontal picture across Czechia and its borders, with a replay of the recent hours; past the latest scan the same timeline continues into a short model forecast with a cloud-cover overlay — clearly marked as computed model guidance, which cannot resolve individual showers or thunderstorms.

Daylight times matter in Czech VFR: the flight has to be planned to land within the published daylight period unless the aircraft, the pilot and the aerodrome are all night-capable. Sunrise, sunset and the civil twilight limits are computed for the centre of Czechia with the east–west spread shown alongside — dusk shifts by nearly half an hour across the country, so check the limit for your own field.

Not an official weather source

VFRAID relays published data to make pre-flight checking faster. It is not an official meteorological source. Always brief with the official Czech aviation weather service and current NOTAMs before flight.