There is an enormous amount of observational and forecast data available. I always find it hard to find. Web interfaces are always changing. Some services let you customize plots. Others do not. Sometimes I find data, but can’t figure out how to navigate there reliably.
This is my cheat sheet on find observations, forecasts, and data.
ECMWF (for forecasts)
Go to the ones below by google search of “temperature anomaly forecast”
Climate Prediction Center: Official 6 – 10 day outlooks
Climate Prediction Center: Official 8 – 14 day outlooks
North American Ensemble Forecast
GLERL Great Lakes Observations
Great Lakes Water Level Dashboard
Lake Surface Temperature (+ ice cover percent)
Data Analysis for the Formally Able