Typical JUNE SWM pattern

 [1] Tilly Tallying Mascarene High near Madagascar / Mauritius.

[2] Another SWM activity along Kerala / Karnataka coast  [As inferred by Shri SWP, [Rtd]Meteorologist]

[3] A typical JUNE pattern as the fag end of JUNE 2014 witnessed pre monsoon TS, hail storm, dust storm and invisible and short lived rotating air column from surface to cloud base.[i.e A TORNADO like powerful whirlwind in Chennai on 28.6.2014 and hail storm on 29 & 30 June 2014] As inferred by Shri SWP, (Rtd)Meteorologist]

As inferred by Shri SWP, [Rtd]Meteorologist]
[3a] Thunderstorm activity is not uncommon one during pre monsoon period in Chennai.

[3b] Rare or occasional HAIL storm  has also been documented in Chennai during May month. 

[3c] As this type climatology prevailed over Chennai during June, July is considered as June
[according to SWP]

VETERAN may enlighten me.