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Melbourne's wettest 12 month period on record?

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johnno
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Melbourne's wettest 12 month period on record?

Post by johnno »

I have just done some research and have discovered that in the past 12 months (August 2010 to July 2011) Melbourne has received 981mm!! which is phenominal!! I went and compared this to the wettest Year on record which was 1916 for Melbourne and we have beaten it by 14mm 967mm fell in 1916 and 977mm fell from August 1916 to July 1917!! Strangely enough the start of 1916 and 1917 were both fairly dry or just below average rainfall so to think we have just beaten the whole of 1916 (Melbournes wettest Year on record) OR any 12 month period between 1916 and 1917 is just remarkable!!

I will do some further research and see if any 12 month period in the 50's, 70's and early 90's was wetter in Melbourne compare to the past 12 months but I would say at this stage it is more than likely to be no considering I have just compared the past 12 months to the wettest Year on record (1916)

Will get back to you guys once I have concluded my research
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Re: Melbourne's wettest 12 month period on record?

Post by Geoff »

Great work Johnno, you're a star! :thumbsup:
AWF Rainfall Details - Monthly rainfall stats. Please post your totals here at the end of each month, thank you
http://www.theaustralianweatherforum.co ... &start=180
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daviescr
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Re: Melbourne's wettest 12 month period on record?

Post by daviescr »

Wow, that's stunning Johnno, thanks for sharing - as always your research is very insightful :)

I wonder if the monthly readings for Melb will be 'downgraded', sorry 'quality controlled' by our friends at the BOM???
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dry
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Re: Melbourne's wettest 12 month period on record?

Post by dry »

According to my calculations (could be dodgy at 11pm),the all-time wettest 12 calendar months is Oct 1954 to Sep 1955 with a total of 1045.5mm.

2nd - Nov 1954 to Oct 1955 with 1026.9mm
3rd - Sep 1954 to Aug 1955 with 1011mm - obviously the same period.

4th - Aug 1934 to July 1935 with 1007.1mm with 5th and 6th around the same period.

This is too much thinking for tonight!
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johnno
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Re: Melbourne's wettest 12 month period on record?

Post by johnno »

Your right Dry all those periods that you mentioned in the 50's are spot on as well as those 12 months in 1934 and 1935 just checked myself then so well done for obtaining that info. So looks like it is not the wettest 12 month period on record but still comes in the top 5 and still wetter than anything around 1916 and 17 period and the 70's 7 early-mid 90's after checking late last night, still a great achievment
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Re: Melbourne's wettest 12 month period on record?

Post by Geoff »

Blimey dry, if Johnno's a star you must be a superstar! Great work! Good to keep old Johnno on his toes though, I reckon! :applause:
Could it be if we get a very wet August we will beat the record for that 12 months?
AWF Rainfall Details - Monthly rainfall stats. Please post your totals here at the end of each month, thank you
http://www.theaustralianweatherforum.co ... &start=180
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Re: Melbourne's wettest 12 month period on record?

Post by dry »

Thanks Geoff. We will need a record breaking August to beat that record!

To make a new 12 month rainfall record (Sep 2010 to Aug 2011), it will need to rain about 151mm. Given the wettest August on record is around 111mm - that is a tough ask!
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