June weather summary: lots of wet stuff in Castlegar

Heavy rainfall on June 19 breaks mark set in 1986 by more than two millimetres.

A rainbow over Twin Rivers Park in Castlegar on Sunday

A rainbow over Twin Rivers Park in Castlegar on Sunday

Submitted: Ron Lakeman at the Southeast Fire Centre, Weather Services

 

For the fourth straight year the amount of precipitation recorded during June was greater than normal. The 105.4 millimetres of rain this month was 160 per cent of the normal June rainfall but less than half the record maximum amount (227.7 mm) received during June 2012.

The mean monthly temperature was 0.5 of a degree warmer than normal, mainly due to relatively mild overnight values.

The initial half of the month was uneventful with a flat ridge of high pressure producing several sunny, warm days while weak disturbances allowed for unsettled conditions with generally light showers & thundershowers at times.

The main rain event (storm total 62.4 millimetres) began during the night of the 18th and continued through the 20th as  a large upper low pressure slowly tracked eastward just south of the International Border.

The one day rainfall of 46.0 mm on the 19th is a new one day maximum rainfall record for the month of June.

The previous greatest one day June rainfall was 44.2 mm from 1986. Following waves of Pacific moisture spiralled northeastward from coastal Oregon-Washington for further showers and relatively cool temperatures during the following week. Another 16 mm of rain fell during the night of the 24th.

The final few days of the month were still unsettled at times but with a large upper ridge of high pressure building from the south much warmer temperatures also developed.