Cumulus Support

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        if(decCom($cloudbasevalue) < ($cloudbaseunit == "m" ? 10 : 29) && $MinutesSinceLastRainTip > 15){ // less than 10m - a rough figure and NO rain

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// This bit
($cloudbaseunit == "m" ? 10 : 29)

// is the same as saying ...
if($cloudbaseunit == "m"){
   10; // check value in metres
} else {
    29; // check value in feet
} 

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// betejuice fuzzy logic
    $suppress = 0; // a flag which will influence skycond display
    $fog = 0;
// Automatic FOG detection - normally starts in the dark before you get up ;-)
    if($display['showFog']){
        if(decCom($cloudbasevalue) < ($cloudbaseunit == "m" ? 10 : 29) && $MinutesSinceLastRainTip > 15){ // less than 10m - a rough figure and NO rain
            if(decCom($temp)  < ($tempunitnodeg == "C" ? 4 : 39)){ // 4 deg C - True temp
                $auto = $hybrid = $langCurrWeather["freeze"] . " ";
            }
            $auto .= $langCurrWeather["fog"];
            $hybrid .= $langCurrWeather["fog"];
            $suppress = 1; // suppress skycond
            $fog = 1;
        }
    } // END fog check

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            if(decCom($temp)  < ($tempunitnodeg == "C" ? 4 : 39)){ // 4 deg C - True temp
                $auto = $hybrid = $langCurrWeather["freeze"] . " ";
            }

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($tempunitnodeg == "C" ? 4 : 39)

// is the same as saying

if($tempunitnodeg == "C"){
   4; // check temp deg C
} else {
   39; // check temp deg F
}
// rough figures ground temp will be lower than air - give prefix 'Freezing ' to fog advisory ;-)