This Monday in London in early March is grey and dark. I had the living room lamp on for most of the morning while I was on zoom calls. I was several minutes late for the low-elevation NOAA-18 satellite pass at lunchtime but I'm still glad I went out to the park, as I met a young mom pushing a stroller, who stopped by to ask what I was doing. I showed her the clouds slowly forming over the South Atlantic, and we spoke briefly about the weather 'above and below'.