May 15, 2018

When Big Rain Days Strike

When it comes to Big Rain Days (BRDs),

South Florida gets about 5 of those per year.

Monthly distribution of when Big Rain Days
occur in south Florida, 1992 to present
As for the month,

They can happen any time of year (see above).


June happens to be the most plentiful, accounting for one of every five.  Interestingly, July is the lowest despite being a core rainy season month (i.e. about 8 inches of rain on average) due to the fact that upper atmospheric instability (still present in June) tends to decrease once the Easterly Trade Winds kick in.

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