As one reader has mentioned, the rainfall in this strategic region is very poor. Mahableshwar, the "water reservoir" of Maharashtra, is very important as it originates 5 rivers from its catchment. The most prominent, The Krishna river flows from the Mahbleshwar catchment down through the plains of Satara dist. rest of Maharashtra, thru A.P. into the Bay. The entire south Maharashtra and Ksishne Basin region of A.P. depends on the rains in this station.
This year, 2010, the station has recieved 890 mms till date, 14th. July, against a normal of 1920 mms required till date.
Last 3 years, end July totals are:
2006: 4733 mms
2007: 2118 mms,
2008: 1200 mms,
2009: 2662 mms.
The driest July was in 1899, with1084 mms during the month.
The highest ever seasonal rain was 10221 mms (1896)
and the lowest 3545 mms (1899).
But the rains are scanty in the ghats, and even though nearby Pune (60 kms away, but on the plains) has recieved 325 (+116) mms, and Satara, 60 kms away in the plains recieved 269 mms (_33). But,the actual rain days are less.
Rain days diagram of Pune and Mumbai (Coastal city) for rainy days comparison).
Another station, Lonavala, is also weak in rains this year.
As on end June, the rainfall there was 437 mms.
Last few years comparison of June shows the situation there.
2008: 1187 mms,
2009: 175 mms.
2010: 437 mms
What actually brings rains to the western ghats are depressions from the bay, not off shore troughs. Normally there should be at least 1 in June and 2/3 in July.This year, we have had none, and got 2 weak systems, that too UACs. Surprisingly, depressions are in drought this year, as are Pacific typhoons !