Weather Scraper

#!/bin/bash
# Filename: weather.sh
# Version.: 21092018
# Author..: robz
#
# Met Office scraper widget.
# Get the url from the web page for your location, chop the date off the end.
# Run from a launcher with this command.
# mate-terminal -t "Current Weather" -e /home/robz/scripts/weather.sh
#
sed1 () { sed 's/<[^>]\+>//g'; }
sed2 () { sed -e 's/^[ \t\n]*//;s/[ \t\n]*//'; }

wsite="https://www.metoffice.gov.uk/public/weather/forecast/qwerty123#?date="
wfile="/home/robz/scripts/weather.txt"
hours=$(date +%H | sed 's/^0//')
today="$(date +%Y-%m-%d)"
check=$(grep 'Timecheck' "$0" | tail -1 | cut -d' ' -f3)

if [[ "$check" != "$hours" ]]; then             # Check stamp at end of script.
    wget -q --retry-connrefused --waitretry=1 \
    "$wsite$today" -O "$wfile"                  # If it's old re-scrape page.
    sed -i '$d' "$0"                            # Delete old time stamp.
    echo "# Timecheck $hours" >> $0             # Insert new.
fi

echo -e "\nTodays weather - $(date +%a' '%d' '%b' - '%H':00') onwards:-\n"

time=$(grep -m1 -A9 'Now' "$wfile" | sed1 | sed2)
aspt=$(grep -m1 -A30 'weatherWX' "$wfile" | sed2 | grep 'title' | \
cut -d\" -f2 | sed -e 's/day\|night//')
prec=$(grep -m1 -A10 'Chance' "$wfile" | sed1 | sed2 | cut -d\; -f2 | tail)
temp=$(grep -m1 -A80 'weatherTemp' "$wfile" | grep 'data-value=' | \
cut -d\" -f2 | sed 's/$/°C/')
wind=$(grep -m10 -A10 '"direction"' "$wfile" | grep 'data-value=' | \
cut -d\" -f2 | sed -e 's/$/mph/')
win2=$(grep -m10 -A10 '"direction"' "$wfile" | grep 'data-value2=' | \
cut -d\" -f2)
gust=$(grep -m11 -A11 '"gust"' "$wfile" | grep 'data-value="' | sed 'n;d;' | \
cut -d\" -f2 | sed -e 's/$/mph/')

hours=$(( 24-hours ))                           # Number of hours to head file.
paste <(echo "$time") <(echo "$aspt") <(echo "$prec") <(echo "$temp") \
<(echo "$wind") <(echo "$win2") <(echo "$gust") | head -n$hours | \
column -s $'\t' -t

echo
echo $(grep -m2 -E 'Sunrise|Sunset' "$wfile" | sed1 | sed2) | column -s -t
read

# Timecheck has to be the last line no blanks.
# Timecheck 13