Weather report November 2019

Overview

I'm afraid there isn't a great deal of detail in this as a few issues have distracted me in early December.  I hope to get  to a series of thematic posts in the next week or so.

Overall a mild month with slightly below median rainfall and strong winds (an evil plot to stop us going out in our kayaks)..

Weather characteristics

Rainfall

We recorded 52.2mm for the month as a whole which at 83.5% of median would not be too bad were it not for:

• only recording 2 months so far this year with above median rainfall; and
• somewhat over half that fall occurring on a single day early in the month (and the only other day with >5mm being the next day).

In terms of history we were, as noted above, below median and very much below last year,

In terms of the possible annual fall, assuming a median fall in December the BoM site was  up (? down might be better) to 656 mm.  This would be either the lowest or second lowest fall recorded since 1975.

Temperature

The best overall measure of temperature is the anomaly calculated as the difference between the mean monthly temperature and the long term average.  BoM data was used entirely for these calculations.  In November that ended the month at -0.1^oC.  The chart shows that the first two days were were hot, but the remainder of the month was quite mild.

The commonest situation (12 of 30 days) was for both minimum and maximum to be below average.  The other three cases (both min and max > average, one above the other below) were even at 6 days each. 

My second overall measure is a presentation of the daily extremes

The highest maximum was 38.8^oC - below the BoM reading which got to 40.7^oC on the 21^st.

Maximum Temperature

The mean maximum temperature was well above the long term average and last year.

Minimum temperature

In contrast to the maximum this was below both the long term value and last year.

Humidity

Both readings for humidity were well below last years's wet November, the  value for 1500 hrs noticeably so

Wind

The month seemed quite windy which is supported by the data.  The longest wind run was 444 km which is the third longest this year, and the strongest gust  64.4 kph (also 3rd highest this yearon the 21st (as the change came through after the hot day).

There is little to compare with but the overall change from previous months looks similar to a long term average.

In terms of wind direction we moved to a Summer pattern with more winds from close to South rather the NW to N.  I shall look at this more closely in the near future.