Tag Archives: 2013

Winter 2013 Warm

Posted in Manilla NSW, Season Weather by

Weather log winter 2013

This winter, June was very cloudy and wet, July was very warm, and August was warm and dry. This pattern was common across northern NSW.
There were only 29 frosts, well below the winter average of 44, and fewer than in winter 2010 (32).
All winter average temperatures were above normal: daily max (18.9°), up by 0.8°; daily mean (11.6°), up by 1.2°; daily min (4.3°), up by 1.6°. In each case, winter of 2009 had been slightly warmer. As in last winter, the subsoil temperature was very high: 17.0°, which is 2.7 °above normal for winter in the decade from 1999. In that same decade, only 34% of winter mornings were cloudy; this winter’s value of 43% has become normal since.
The winter rainfall total of 134 mm is just above the average (125 mm) and in the 62nd percentile.Climate Winter 2013

Data. Rainfall data is from Manilla Post Office, courtesy of Phil Pinch. Temperatures, including subsoil at 750 mm, and other data are from 3 Monash Street, Manilla.

Dry, Warm August 2013

Posted in Manilla NSW, Monthly weather by

The daily weather logWeather log August 2013.

The month had no extremes of heat or cold. Frosts (10) were almost as rare as in August 2011 (9). Some overcast skies came with 5.8 mm of rain on the 17th then, from the 25th, there were five cloudless mornings bringing very warm weather. Altogether, only three days had rain (usually 6).

Comparing August monthsClimate August 2013.

After July having temperatures two degrees above normal, this month’s maximum was only one degree up, and the minimum just on normal. While the air was not as extremely dry as it was last August, the morning dew point was still very low: 2.7 degrees below normal. In contrast, the subsoil temperature remained extremely high, at 16.6°, 2.7° above normal.
Total rainfall is far below the average of 39.5 mm. At 6.4 mm, it is in the 9th percentile: since 1888, only 10 August months have been drier. In totals for two months and more, there is no serious shortage of rainfall, although nearly all totals up to 18 months are now below the median. Totals for all longer periods (up to 360 months) are above the median.

Data. Rainfall data is from Manilla Post Office, courtesy of Phil Pinch. Temperatures, including subsoil at 750 mm, and other data are from 3 Monash Street, Manilla.

Extremely warm July 2013

Posted in Manilla NSW, Monthly weather by

The daily weather logWeather log July 2013.

There were three warm spells and no cold spells in July. Fourteen days went over 20 degrees, instead of the usual four. There were only eleven frosts, the fewest in 15 July months (usually 17). In five rain days, two high rainfall figures came on the 20th (19.2mm) and the 21st (9.6mm).

Comparing July monthsClimate July 2013.

After June’s extreme cloudiness and rain, July was very near to normal in everything but temperature. The average values of daily maximum, daily minimum, and daily mean temperature were all just under two degrees above normal. The daily maximum and daily mean are 15-year record high values, but the daily minimum had been higher in July 2010: 2.4 degrees above normal.
(Note: My “normal” is the ten year average from March 1999. For the official normal period 1961-1990 there are no Manilla figures (except rainfall). This month’s very high temperatures would be (perhaps) just over 2 degrees above the 1961-1990 average.)
Rainfall, at 29.8 mm, is in the 43rd percentile, a bit below the average (41.1mm). Rainfall totals for 24 months and more are very high. This accounts for the rare appearance of water flowing locally in Greenhatch Creek.

Data. Rainfall data is from Manilla Post Office, courtesy of Phil Pinch. Temperatures, including subsoil at 750 mm, and other data are from 3 Monash Street, Manilla.

3-year trends to June 2013

Posted in 3-year climate trends, Manilla NSW by

Parametric plots of smoothed climate variables at Manilla
“Suddenly very wet”Trends to June 2013.

 

While days were only a little cooler than normal in June, moisture variables were extremely high. Rainfall, cloudiness and daily temperature range went beyond the blue lines. Cloudiness reached a record for this data set.
Both daily minimum temperature and subsoil temperature were also very high.

The fully-smoothed data point for December 2012 shows a drift towards normal from the mild drought of October.

Note:
Fully smoothed data – Gaussian smoothing with half-width 6 months – are plotted in red, partly smoothed data uncoloured, and raw data for the last data point in orange. January data points are marked by squares.
Blue diamonds and the dashed blue rectangle show the extreme values in the fully smoothed data record since September 1999.

June 2013: Extreme Cloud and Rain

Posted in Manilla NSW, Monthly weather by

The daily weather logWeather log June 2013.

The first weeks were warmer than usual, including a Queen’s Birthday Saturday that reached a pleasant 23°. In contrast, Tuesday the 25th reached only 9.7° making it the fifth coldest day of the century.

There were hardly any sunny mornings in the month, and most were close to overcast. Cloud kept the nights warm, limiting the number of frosts to only eight. The night of the 7th had a minimum of 12.6°, nine degrees above normal.

The wettest of 10 rain days had 38.0 mm, almost as high as a 38.2 mm reading in June 2008.

Comparing June MonthsClimate June 2013.

Extreme cloudiness and rain lead this month’s climate values. Having 73% of mornings with cloud covering more than half the sky makes this the cloudiest month in the 21st century by far. July 2010 and March 2011 reached only 61%. This month’s figure is over twice the June average of 33% cloudy mornings.

With a rainfall total of 98.0 mm, this is the eighth wettest June in 131 years. The wettest was June 1920, with 173 mm. That was the first of a cluster of four extremely wet Junes, ending with June 1931, that were among the ten wettest. Only eight years ago, June 2005 was the sixth wettest on record, at 109 mm.
This month’s rainfall defers any shortage. Among totals for more than one month, the driest is the 34th percentile for the last three months (Total 3-month rain: “only” 116 mm).
The mean daily maximum temperature, 17.3°, is just 0.5° below normal, but the mean daily minimum, 5.7°, is very high, 2.9° above normal (as in 2005, 2008 and 2009). The subsoil remains very warm.

Data. Rainfall data is from Manilla Post Office, courtesy of Phil Pinch. Temperatures, including subsoil at 750 mm, and other data are from 3 Monash Street, Manilla.