A PIREP is a real-time weather report provided directly by a pilot in flight. Unlike forecasts or automated observations, a PIREP describes actual conditions encountered, making it one of the most valuable sources of operational weather intelligence.
PIREP stands for Pilot Report, and it supplements METARs, TAFs, SIGMETs, and AIRMETs with firsthand information.
What PIREPs report
A PIREP may include information on:
- Turbulence (intensity and altitude)
- Icing (type, severity, altitude)
- Cloud tops and bases
- Visibility
- Wind conditions
- Temperature
- Weather phenomena (storms, mountain wave, wind shear)
Reports can be routine (UA) or urgent (UUA).
Urgent PIREPs (UUA)
Urgent PIREPs are issued immediately when conditions pose a significant hazard, such as:
- Severe turbulence
- Severe or extreme icing
- Volcanic ash
- Low-level wind shear
- Tornadoes or funnel clouds
These reports are rapidly disseminated to ATC and weather services.
Why PIREPs matter
Forecasts predict.
Sensors measure fixed points.
PIREP tells you what is actually happening where aircraft are flying.
They are especially important because:
- Weather can change faster than forecasts
- Automated systems cannot detect all hazards (especially turbulence and icing)
- Conditions vary dramatically with altitude and terrain
Operational use
Pilots and controllers use PIREPs to:
- Adjust routing and altitude
- Anticipate turbulence or icing layers
- Validate or challenge forecasts
- Enhance situational awareness in dynamic weather environments
In real-world operations, pilots are encouraged and expected to submit PIREPs when encountering notable conditions.
Application in DCS World
DCS does not model PIREPs as a functional system:
- There is no in-sim mechanism to submit or receive pilot weather reports
- Weather conditions are mission-defined and static or scripted
However, PIREPs remain essential theoretical knowledge, helping cadets understand:
- How real-world weather awareness is built
- Why multiple information sources are combined
- The limits of automated weather data
Training value
Cadets should:
- Understand what information a PIREP contains
- Know when a report would be routine vs urgent
- Mentally correlate encountered conditions with what would merit a PIREP
- Develop weather awareness beyond “what the briefing said”
In aviation, the best sensor is still another pilot who just flew through it.