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#1498096 - 29/04/2019 23:55 April 2019 Rain, other weather stats, comments etc.
Seabreeze Offline
Weatherzone Moderator

Registered: 18/09/2005
Posts: 10665
Loc: SWR
Feel free to post your April 2019 rainfall, other weather stats or comments etc. in this thread.

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#1498125 - 30/04/2019 17:02 Re: April 2019 Rain, other weather stats, comments etc. [Re: Seabreeze]
retired weather man Offline
Meteorological Motor Mouth

Registered: 01/07/2007
Posts: 5161
Loc: Wynnum
Wynnum North April Summary - Temp. right on average, rain slightly above average.

Thanks to excellent March rain and good rain for April, the Autumn rain is already above average, before May even starts.






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#1498174 - 01/05/2019 09:44 Re: April 2019 Rain, other weather stats, comments etc. [Re: Seabreeze]
Graham M Offline
Weather Freak

Registered: 21/01/2002
Posts: 440
Loc: Boambee East near Coffs Harbou...
My data is up.

Warmer than normal.

Records broken: highest ever April maximum temperature & greatest number of rain days for April.

Data covers 25 years.

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#1498225 - 02/05/2019 00:05 Re: April 2019 Rain, other weather stats, comments etc. [Re: Seabreeze]
Seabreeze Offline
Weatherzone Moderator

Registered: 18/09/2005
Posts: 10665
Loc: SWR
April 2019 Rainfall at South West Rocks:

(Note: 24 hour rainfall, for example, on April 1st = Rainfall from 9am April 1st to 9am April 2nd)

- 167.8mm fell during April, which was only just below the average. Rainfall was 1.5mm below the April average (Apr Avg. 169.3mm), or 99.11% of the average.
- Rainfall was above the median for the month of April though (151.3mm).
- There were 21 raindays during April (Apr Avg. 12.9 raindays).
- The wettest daily fall of rain was on the 1st, when 52.8mm fell.
- There was one thunderday (day when thunder heard) during April, on the: 9th.
- One thunderstorm passed over the house during April ("near-misses" are not included in count):
#1 - Apr 9th [pm]

At the end of April:
There have been 59 raindays for the year-to-date (Jan-Apr Avg. 55.7 raindays).
The year-to-date total is 428.4mm, which is 238.0mm below the January-April average of 666.4mm.

Other periods of rainfall (3 monthly to 12 monthly):
3-month Rainfall (Feb 2019 to Apr 2019): 418.2mm (Feb-Apr Avg. 522.3mm)
6-month Rainfall (Nov 2018 to Apr 2019): 737.8mm (Nov-Apr Avg. 899.3mm)
12-month Rainfall (May 2018 to Apr 2019): 1184.4mm (Yearly Avg. 1490.8mm)


Days with Weather Warnings issued for the Mid North Coast district during April 2019 (Marine/Coastal Wind Warnings are not included):
Severe Thunderstorm Warning:
Apr 9th (Damaging Winds)

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#1498610 - 08/05/2019 23:35 Re: April 2019 Rain, other weather stats, comments etc. [Re: Seabreeze]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2189
Loc: Manilla, near Tamworth NSW
At Manilla, April was a rather warm month, remarkable only for having no rain, as in four previous April months.
https://climatebysurly.com/2019/05/08/no-rain-days-in-april-2019/
The drought continues to intensify. It seems to be the worst on record, at least as bad as 1902 and 1946.
I feel obliged to keep saying that the much-ballyhooed millennium drought was a non-event in north-eastern NSW.
The current drought now includes severe rainfall shortage (below the 5th percentile) at a duration of 20 years. Thus, the brief extreme drought here in 2002 is now incorporated into the 2018 drought.
I have made a line graph of the rainfall shortages of April (and March) here:
https://climatebysurly.com/2019/05/01/april-2019-7-lowest-rainfall-totals/



For the last 12 months, I have been updating my drought graphs in the thread: Weatherzone>>Forums>>Weather Events>>NSW/ACT>>NSW rainfall shortage from May 2018.
http://forum.weatherzone.com.au/ubbthreads.php/topics/1465682/3/NSW_rainfall_shortage_from_May
_________________________
Data are cheap; information is expensive!

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#1498642 - 09/05/2019 14:27 Re: April 2019 Rain, other weather stats, comments etc. [Re: Surly Bond]
Graham M Offline
Weather Freak

Registered: 21/01/2002
Posts: 440
Loc: Boambee East near Coffs Harbou...
That's a very impressive graph, Surly. So impressive, I haven't got a clue what it means.

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#1498704 - 10/05/2019 10:37 Re: April 2019 Rain, other weather stats, comments etc. [Re: Seabreeze]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2189
Loc: Manilla, near Tamworth NSW
Hi Graham
I am sorry that this graph does not make sense at first sight. I find that people think that reading from left to right shows the passing of time. It does not.

Points on the thick black line all show the rainfall situation for the last month only.
The left-most point on that line shows that the single month of April had an extreme shortage of rain. It is in the part of the graph labelled "Extreme Shortage". It is not just extreme, it is on the bottom line of the graph: the lowest-ever rainfall for April (that is, Zero).
Reading along the thick black line, we see that the rainfall totals (all of them calculated to the end of April) for 2 months, 3, 4, 5, and 6 months were mostly only "serious" rainfall shortages, below the 10th percentile. That makes the drought seem not too bad, although there is still not much feed about.
Moving further to the right along the thick line, we see that most of the rainfall totals calculated for durations between 12 months and 84 months (= 7 years) are disastrous shortages: the worst in the record from 1884. It is no wonder that Lake Keepit is dry.

In the blog post that has this graph, I have explained it and showed how I did it:
https://climatebysurly.com/2019/05/01/april-2019-7-lowest-rainfall-totals/
_________________________
Data are cheap; information is expensive!

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#1498708 - 10/05/2019 11:07 Re: April 2019 Rain, other weather stats, comments etc. [Re: Seabreeze]
NotsohopefulPete Offline
Weatherzone Addict

Registered: 24/12/2008
Posts: 1405
Loc: Toowoomba
You certainly go to a lot of effort Surly Bond. How are conditions after the rain in your and the Tamworth area? The rainfall deficiencies Between Toowoomba and the border from the drought that commenced after ex-Cyclone Debbie are I think absolutely mind-boggling(As usual, most of that area did not get enough from that event to improve things) and are gradually creeping eastwards into the Lockyer Valley other areas east of the Great Divide. Your explanation above helped a lot.
Cheers


Edited by NotsohopefulPete (10/05/2019 11:08)

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#1498734 - 10/05/2019 16:24 Re: April 2019 Rain, other weather stats, comments etc. [Re: Seabreeze]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2189
Loc: Manilla, near Tamworth NSW
Hi Pete
We had 40 mm on the 30th of March, and 60 mm on the 4th of May. That is not very much when there is a deficit of about a metre of rain to make up. On the graph I have noted that the last 20 years had just over 12,000 mm. On the average (650 mm/yr) we would have had 13,000 mm. Now all the storages, on the surface and underground, need a metre of rain just to restore them to "normal".
Not that we know what "normal" is, with a trivial record of only 135 years of rainfall readings.


Edited by Surly Bond (10/05/2019 16:28)
_________________________
Data are cheap; information is expensive!

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#1498741 - 10/05/2019 17:18 Re: April 2019 Rain, other weather stats, comments etc. [Re: Seabreeze]
NotsohopefulPete Offline
Weatherzone Addict

Registered: 24/12/2008
Posts: 1405
Loc: Toowoomba
Thanks, Surly Bond, interesting winter ahead.

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#1498747 - 10/05/2019 19:00 Re: April 2019 Rain, other weather stats, comments etc. [Re: Surly Bond]
Graham M Offline
Weather Freak

Registered: 21/01/2002
Posts: 440
Loc: Boambee East near Coffs Harbou...
Thank you, Surly. I'll spend some time on the weekend after I've finished the cryptic crosswords to see if I can digest it. I only have an IQ of 82. wink

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