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Thread: Curious about the PIREP's map...

  1. #1
    Join Date
    Jan 2008
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    PIT, PHX, PDX, LHR, SAN, Kai Tak
    Posts
    25

    Default Curious about the PIREP's map...

    I am aware that the data is reported from various aircrews and am aware that the pilots discuss, among other things, the turbulence in their general flight area. But does the PIREP map get populated by a voluntary reporting or does ATC take a random sampling based on the chatter that is happening in their area to ensure a steady stream of data? And then is it a percentage indicator (each tick mark represents 10 reports) or more of a logarithmic indicator (the more tick marks indicate considerably more reports than a fewer number)?

    Thanks in advance!

  2. #2
    Join Date
    Jan 2006
    Location
    DTW, MCO, LAN, TPA, RSW
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    4,763

    Default

    Hi. I believe it's populated with some automated reporting (I know United had some automated units on aircraft for a while), and specifically when pilots report turbulence. I don't believe ATC takes a random sampling of chatter, but I know that SIGMETS and AIRMETS have been issued because of pilot reports.

    The ticks are not logarithmic or anything like that, they are strictly linear. If the map is painted orange with PIREPS you know it's going to be a bumpy ride.

    You can see the content of individual reports here:

    and below is an example:

    http://aviationweather.gov

    Urgent PIREP A332
    Obs Time: 2017-01-23T17:20:00Z
    Hazard: Turbulence
    Intensity: MOD-SEV
    Flight level: 250

    Urgent PIREP: SBY UUA /OV SBY/TM 1720/FL250/TP A332/TB MOD-SEV/RM 250-210

    Obs Time: 2017-01-23T16:50:00Z
    Hazard: Turbulence
    Intensity: SEV
    Flight level: 260

    Urgent PIREP: ADW UUA /OV OTT/TM 1650/FL260/TP B757/TB SEV/RM 260-280
    TURBULENCE FORECAST IS NOT LIABLE FOR ANY OF THE INFORMATION FOUND HERE. USE AT YOUR OWN RISK.

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