One practical thing that would have made your twenty minutes shorter: learn to read the forecast rather than the summary.
A phone app showing a symbol and a temperature tells you almost nothing about whether a high exposed section is viable. What matters, in rough order:
Wind speed and direction at altitude, not at the valley. Mountain forecasts give this separately and the difference is large. Wind is what makes exposed ground dangerous rather than merely unpleasant, and there is a wind speed above which walking on a ridge is not a judgement call.
Cloud base. Whether you will be in cloud on the high section decides your navigation, and it is a number rather than a picture.
Precipitation type and freezing level, particularly in shoulder seasons where a few hundred metres decides between rain and ice.
The trend. Improving through the afternoon and deteriorating through the afternoon look identical on a single symbol.
A dedicated mountain forecast for your area gives all of these, and reading one takes two minutes once you know what you are looking for. It converts unsettled into numbers you can compare against the thresholds you wrote down at home, which is the whole point.
And get it before you lose signal. Ideally the evening before, with a note of what to expect and when.