Screen srape weather from http://wttr.in/ , inspired by https://www.reddit.com/r/PowerShell/comments/4e5eyi/making_wttrin_working_with_powershell/

wttr.in.ps1

# Get the weather
$wttr = Invoke-WebRequest http://wttr.in/

# Regex to match lines with no data in them, including blank lines and decorative borders
$RegExNoData = '^[ ─┌┬┤├┐┼└┴┘]*$'

# This is used to match the phase line and exclude it.
# Also used to create an array of weather data for each date
$PhasesOfDay = @("Morning", "Noon", "Evening", "Night")

# The $DataLine var will be the index used to define the hash key for the weather value
$WeatherKeys = @("Conditions", "Temperature", "Wind", "Visibility", "Precipitation")

$DateStringFormat = "m"

# Get the preformatted block(s)
$wttr.ParsedHtml.getElementsByTagName("pre") |
    # Output as a sttream/array of text lines/rows with the extra CR removed from the end
    ForEach-Object { $_.outerText.Split("`n").TrimEnd() } |
    # Exlude blank and decorative-only lines
    Where-Object { -not ($_ -match $RegExNoData ) } |
    # Exclude lines listing the phases of the day
    Where-Object { -not ($_ -match ($PhasesOfDay -join ".*") ) } |
    ForEach-Object -Begin {
        # Begin block initializes starting variables
        # The first weather info is one cell across, so $Datum is only a single object
        $Date = Get-Date
        $City = $null
        $Country = $null
        $DataLine = 0
        $Datum = New-Object psobject -Property ([ordered]@{
            Date = $Date
            DateString = Get-Date -Date $Date -Format $DateStringFormat
            PhaseOfDay = "Current"
            City = $City
            Country = $Country
            Weather = [ordered]@{}
        })
    } -Process {
        # First line should be this; capture City and Country data
        if ($_ -match "Weather for City") {
            $City = $_.Split(':')[1].Split(',')[0].Trim()
            $Country = $_.Split(':')[1].Split(',')[1].Trim()
            $Datum | ForEach-Object {
                $_.City = $City
                $_.Country = $Country
            }
            # Don't process this block any further, start processing the next line
            return
        }

        # Match the rows with the date
        if ($_ -match '^┌[─┬]+┤.+├[─┬]+┐$') {
            # Output $Datum which is complete
            $Datum
            # Parse the date
            $Date = Get-Date -Date ($_.Split("┤├")[1].Trim())
            # Reset variables
            $DataLine = 0
            # Create new Datum
            $Datum = $PhasesOfDay | ForEach-Object {
                New-Object psobject -Property ([ordered]@{
                    Date = $Date
                    DateString = Get-Date -Date $Date -Format $DateStringFormat
                    PhaseOfDay = $_
                    City = $City
                    Country = $Country
                    Weather = [ordered]@{}
                })
            }
            # Don't process this block any further, start processing the next line
            return
        }

        # Process each line of data. Every text row that reaches this point
        # should be a line that matches one of the $WeatherKeys
        $Index = 0
        # Cleverness here: Splitting the line into an array using the vertical
        # separator and removing empty entries so $Index of 0..3 are the 4 strings we want
        # Or 0 is the one string if this is the "current" conditions at the top of the file
        $_.Split('│', [StringSplitOptions]::RemoveEmptyEntries) | ForEach-Object {
            # Use $Index to match to morning, noon, etc. Use $DataLine to
            # track which weather value this is. Cut out the icon text and trim white space
            $Datum[$Index].Weather[$WeatherKeys[$DataLine]] = $_.Substring(15).Trim()
            $Index++
        }
        $DataLine++
    } -End {
        # Output the last Data
        $Datum
    } |
    # Do something with data. I'm converting it to JSON because it's the
    # easiest way for me to expand the Weather hash while developing.
    ConvertTo-Json