Weather links which I use to compile my meteorology posts are listed below. The emphasis is on visual representation rather than technical accuracy. I retired from operation forecasting and now merely contemplate the weather.
NASA EOSDIS excellent quick browser for current and archive imagery
Dundee Satellite Receiving Station raw data direct from the receiving station, registration is required.
UKMO Synoptic Charts
Archive UKMO midnight charts useful for comparing with past satellite imagery
Earth wind map useful for browsing NWP data at different levels around the globe.
Snow and Ice
METEOCEN Reading well chosen links.
Weather Charts everything should be here somewhere.