What weather conditions would lead to lightning strikes before sunrise?
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Twice now I have been summitting peaks in Rocky Mountain National Park while getting really early starts to avoid the afternoon thunderstorms.
However in both cases I could still see lighting in the distance several hours before sunrise (think 3:30 to 6:00 am).
What type of weather conditions would lead to lightning strikes before sunrise?
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Thunderstorms due to diurnal variations from the previous day that still last as well as incoming cold fronts could be the cause. The former wouldn't be a big threat, as they would abate, the latter would likely thwart any attempt at the peak (however generally you would be aware of it due to forecasting).
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