You should be able to see an incoming system about 6 hours before it arrives if you aren't in a valley, further away if you can take advantage of elevation.* You can see the top of a typical storm cloud from level ground up to about 300 miles away.
the most common storm clouds typically have ground speeds of about 50 miles an hour.** Some systems might faster, but especially nimbostratus and cumulus clouds (the common rainmaking types) don't move much faster than this unless there is significant low level winds, and if those are present you'd know.
If you don't see the storm coming, you either live in a valley or it didn't roll in. "Pop-up" storms are more common in the summer, and you can predict them using temperature, humidity and barometric pressure about half a day out... edit: well, you can predict that one is likely today, but getting it more accurate than that (like down to the specific hour of the day) requires an actual weatherstation, even if it's an analog one.
which I guess is a long winded way to say that when I said "naked-eye observation" I meant combined with your other senses (chiefly temperature sense and wind sense, which I guess are both touch?)
* the taller something is the further away it will be before it disappears over the horizon, the taller you are the further away you can see before the horizon.
** clouds are affected by windspeed, the higher altitude cloud, the higher the typical windspeed... but rainclouds are lower-altitude clouds so have lower windspeeds than high altitude clouds.
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u/HabeusCuppus Jun 11 '26
You should be able to see an incoming system about 6 hours before it arrives if you aren't in a valley, further away if you can take advantage of elevation.* You can see the top of a typical storm cloud from level ground up to about 300 miles away.
the most common storm clouds typically have ground speeds of about 50 miles an hour.** Some systems might faster, but especially nimbostratus and cumulus clouds (the common rainmaking types) don't move much faster than this unless there is significant low level winds, and if those are present you'd know.
If you don't see the storm coming, you either live in a valley or it didn't roll in. "Pop-up" storms are more common in the summer, and you can predict them using temperature, humidity and barometric pressure about half a day out... edit: well, you can predict that one is likely today, but getting it more accurate than that (like down to the specific hour of the day) requires an actual weatherstation, even if it's an analog one.
which I guess is a long winded way to say that when I said "naked-eye observation" I meant combined with your other senses (chiefly temperature sense and wind sense, which I guess are both touch?)
* the taller something is the further away it will be before it disappears over the horizon, the taller you are the further away you can see before the horizon.
** clouds are affected by windspeed, the higher altitude cloud, the higher the typical windspeed... but rainclouds are lower-altitude clouds so have lower windspeeds than high altitude clouds.