Record Breaking Rainfall

11 05 2012

by Dale C. S. Destin

This is the wettest start to May at the V. C. Bird International Airport, based on available record, which dates back to 1971. The rainfall for the first seven days of May, 2012 is now the most on record for all Mays with 121.9 mm or 4.80 inches; the previous highest was 63.4 mm or 2.50 inches recorded in 1990. The rainfall was caused by a persistent deep-layered trough system, which channelled a lot of moisture from South America into the area resulting in periods of rain, showers and thunderstorms. The heaviest rainfall occurred on Saturday, 5 May with 76.5 mm or 3.01 inches falling in a short period of time, about 3 hours. This resulted in minor to moderate flooding in some low-lying and flood prone areas. May 5 also had its highest total on record, and it tied with May 30, 1992 for the fourth wettest day for all Mays.

Our outlook for May calls for above normal rainfall and near normal temperature and wind. Given what has happened thus far, we could easily see this May becoming one of the top 10 wettest Mays on record. Does anyone want to guess/forecast what the final rainfall total for the month at the airport is going to be?  Here is a guide; the average and median totals for May 12 – 31 are 16.6 and 25.1 mm respectively; the max and min totals are 444.8 and 7.5 mm respectively (1981 – 2010). What is your guess/forecast total for the month? Tweet us at or

Daily Rainfall Totals at the V. C. Bird International Airport – May 1 to May 7, 2012:

May 1    1.0 mm or 0.04 in

May 2    3.0 mm or 0.12 in

May 3    10.7 mm or 0.42 in

May 4    0.9 mm or 0.04 in

May 5    77.9 mm or 3.07 in

May 6    10.6 mm or 0.42 in

May 7    17.8 mm or 0.70 in



Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: