PowerShell/Scripts/check-weather.ps1

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<#
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.SYNOPSIS
check-weather.ps1 [<location>]
.DESCRIPTION
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Checks the weather for critical values.
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.EXAMPLE
PS> .\check-weather.ps1
.LINK
https://github.com/fleschutz/PowerShell
.NOTES
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Author: Markus Fleschutz · License: CC0
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#>
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param([string]$Location = "") # empty means determine automatically
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function Check { param([int]$Value, [int]$NormalMin, [int]$NormalMax, [string]$Unit)
if ($Value -lt $NormalMin) {
return "$Value $Unit ! "
}
if ($Value -gt $NormalMax) {
return "$Value $Unit ! "
}
return ""
}
try {
$Weather = (Invoke-WebRequest http://wttr.in/${Location}?format=j1 -UserAgent "curl" ).Content | ConvertFrom-Json
$Temp = $Weather.current_condition.temp_C
$Precip = $Weather.current_condition.precipMM
$Humidity = $Weather.current_condition.humidity
$Pressure = $Weather.current_condition.pressure
$WindSpeed = $Weather.current_condition.windspeedKmph
$WindDir = $Weather.current_condition.winddir16Point
$UV = $Weather.current_condition.uvIndex
$Visib = $Weather.current_condition.visibility
$Clouds = $Weather.current_condition.cloudcover
$Desc = $Weather.current_condition.weatherDesc.value
$Area = $Weather.nearest_area.areaName.value
$Region = $Weather.nearest_area.region.value
"Now: $($Temp)°C $($Precip)mm $($Humidity)% $($WindSpeed)km/h from $WindDir $($Pressure)hPa UV$($UV) $($Visib)km $($Clouds)% $Desc at $Area ($Region)"
$Result+=Check $Weather.current_condition.windspeedKmph 0 48 "km/h"
$Result+=Check $Weather.current_condition.visibility 1 1000 "km visibility"
$Result+=Check $Weather.current_condition.temp_C -20 40 "°C"
$Result+=Check $Weather.current_condition.uvIndex 0 6 "UV"
if ($Result -eq "") {
"Calm weather"
} else {
"WEATHER ALERT: $Result"
}
exit 0
} catch {
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write-error "⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
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exit 1
}