Im in the same boat, their site performance has seem to just been getting worse over time and it is barely even functional on my phone, however I don't know of anyone else that condenses almost the entirety of a highly detailed 7+ day weather report into such a small and useful little graph with every detail you would want. What would take multiple pages worth of reporting is covered in a small graph the size of my hand.
It was invaluable when I did outdoor work, everyone else was making guesses and extrapolations based on the shitty reports from different local news stations and radar and satellite maps, meanwhile I could tell exactly when a big storm would role through and if rain would be spotty or temperature swings with just a glance for multiple days ahead.
Look for an app which lets you download GRIB files. PocketGrib and LuckGrib are a couple to try. You can download GFS data (produced by NOAA) for the area/timescale/data you are interested in, drop a cursor anywhere on the map and view a meteogram.
This is the same data used by "value add" weather forecasting sites and services to produce their forecasts.
It was invaluable when I did outdoor work, everyone else was making guesses and extrapolations based on the shitty reports from different local news stations and radar and satellite maps, meanwhile I could tell exactly when a big storm would role through and if rain would be spotty or temperature swings with just a glance for multiple days ahead.