Significant warmth in Sydney.

[Don White]

The overnight minimum in Sydney  last night appears to have been 25.9 which would have been the warmest March night ever.

However, the BoM  will probably  take it  as 24.7  which was the 9 am temp yesterday morning.

Even at  24.7  it will still be the warmest March minimum temp in Sydney  for 110 years, since  25.3  was reported on 8 March 1915.

 

Don White

donw...@weatherwatch.net.au

Mob: 0417248705

 

[Bussy R]

Hi Don.

 

37.3 at 2.58pm and then became cloudy here yesterday and down to 23.1 at 4.51am this morning. Which is by far our warmest night this month.

 

Regards Bussy

 

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[Blair Trewin]

OFFICIAL

Looks like 24.5 actually - must have fallen a little after 9am yesterday. Of course, there may have been other nights historically where the same thing happened - we only have full records of 'overnight' minimum temperatures since 1-minute data started (in the 1990s at Sydney), although looking at 6am temperatures can give you an idea. I'd do this myself but I'm not back in the office for another week.

Blair

OFFICIAL

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From: aust...@googlegroups.com <aust...@googlegroups.com> on behalf of Don White <donw...@weatherwatch.net.au>
Sent: Sunday, March 16, 2025 11:15 AM
To: aust...@googlegroups.com <aust...@googlegroups.com>

Subject: [austpacwx] Significant warmth in Sydney.

 

The overnight minimum in Sydney  last night appears to have been 25.9 which would have been the warmest March night ever.

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[Don White]

It is also interesting to contemplate  that  if it had not been daylight saving and the 2h hr  period  started an hour layer last night would have been the hootest March night on record  for Sydney

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[Gavin O'Brien]

Hi all,
After a bustry afternoon some showers about quite heavy in patches.

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[Gavin O'Brien]

Hi all, again!

We had some quite heavy showers in area earlier this afternoon with a few PWS in South Canberra and east of Queanbeyan  reporting up to 25mm; none here at Gilmore, although we ran through some very intense showers on the Monaro Highway on our way to Fyshwick around 3pm.

In last hour we had had a lot of dust reducing visibility to around 10 km. A brief shower while in Fyshwick following the earlier shower coated our car and everyone else's cars in a sprinkling of red mud! Looks like another band of showers to come so more mud likely! 

I assume it has come from the drought impacted southern South Australia even through the Cold front is still crossing the Riverina. Max Gust so far 51 km/hr. at 1351.

Gavin

[Blair Trewin]

OFFICIAL

Had a chance to look at the hourly data. Sydney has digitised 3-hourly data back to 1955. Hourly data on the 'odd' hours' though are only stored in that table back to 2010 or so (they can be obtained elsewhere but more laboriously).

 

0600 temperature (=0500 standard time) was 26.3, next highest is 25.5 on 30/3/2017 (data covers the daylight saving period, which has been most/all of March for about the last 15 years but only parts of it before then, and none before 1972)

0700 temperature (=0600 standard time) was 26.1, next highest 25.6 on the same 2017 day (data covers back to ~2010, and non-daylight saving period before then back to 1955).

 

Since this means there are no days without at least one observation of 25.5 or lower within the overnight window in the post-1955 period, we can conclude that the 25.9 overnight minimum (either 1800-0900 or 1500-0900) on 16 March was the highest in the post-1955 period. We don't have any sub-daily data to assess the overnight minimum on the late 19^th/early 20^th century days with daily minima above 25.

 

Blair

 

OFFICIAL

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