Tag Archives: 2011

Sunny April 2011

Posted in Manilla NSW, Monthly weather by

The daily weather logWeather log April 2011.

April weather cooled as usual, except that the second week was rather cooler, by day and by night. There were no frosts.
Most days had little cloud. There were six rain days (usually four), with the highest reading 17.4 mm on the 11th.

 Comparing April monthsClimate April 2011.

Mean temperatures were close to average. It was a very sunny month, with only 20% cloudy mornings (>4/8 cloud). April 2005 had been even sunnier, with only one cloudy morning.

The rainfall of 31.6 mm is on the 50th percentile for April: it is on the median – half of all Aprils have been wetter and half have been drier – but below the long-term average (39.3 mm). Rainfall totals for 5, 6, 9, and 12 months remain very high: above the 70th percentile.

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 March 2011.

Posted in 3-year climate trends, Manilla NSW by

Parametric plots of smoothed climate variables at Manilla

“Extreme cloudiness”Trends to March 2011.

Most of the March 2011 raw data values (in orange) are nearer to normal than to recent extremes. As an exception, the March cloudiness anomaly is a record +37%: there were 19 cloudy mornings instead of 8.

Smoothed September values include new 12-year record anomalies for daily maximum temperature (low), cloudy days (high) and daily temperature range (low).

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.

March 2011 still cloudy

Posted in Manilla NSW, Monthly weather by

The daily weather logWeather log March 2011.

There were two warm spells and two cool spells in March, with no extreme temperatures.
Many mornings were very cloudy: fourteen had 7/8 or 8/8 cloud. In twelve years only six months have had so many. (Last December had sixteen.)
The highest rainfall reading was 17.4 mm on the 18th. In ten rain-days (twice the usual number) the total was 42.0 mm. No rain fell after the 20th.

 Comparing March monthsClimate March 2011.

The mean maximum temperature was a little low and the mean minimum temperature high, making the daily temperature range nearly two degrees narrower than average. Related to this, cloudy mornings (>4/8 cloud) reached a record 61%, equal with June 2010 .
The rainfall of 42 mm is in the 54th percentile for March. While below the long-term average (53 mm), it is far above the most common March total of 11 mm. Rainfall totals for groups of months remain high: above the 70th percentile for all periods up to 15 months.

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 February 2011

Posted in 3-year climate trends, Manilla NSW by

Parametric plots of smoothed climate variables at Manilla

“Sudden Rise in Temperatures”Trends to February 2011.

In the current plots we see final smoothed trends for the winter (JJA) of 2010.

Daily Maximum Temperature

On each plot, the x-axis has the anomaly of mean daily maximum temperature.  In winter 2010 the smoothed temperature anomaly fell very rapidly to near the earlier record low smoothed value. Partially smoothed later values suggest that an extreme negative temperature anomaly came in November 2010. The raw value for February 2011 is remarkably high.

Rainfall

Rainfall anomalies are plotted (inverted) on the y-axis of the first graph. Fully-smoothed winter values were all positive, rising with falling maximum temperature. Later values generally rose rapidly to an apparent positive extreme in November.

Cloudiness

During winter of 2010 the anomaly of percent cloudy days rose to yet a new record for fully-smoothed values. It continued to rise to an apparent extreme in October 2010, since when it has remained extremely high.

Early morning Dew Point

The Dew Point anomaly was positive and rapidly rising in winter. It seems to have peaked at less than a record value in October 2010. By February the anomaly was much less positive.

Daily Temperature Range

The temperature range anomaly fell during winter to yet a new negative record for smoothed data. It continued to fall to an apparent negative peak in October 2010. The raw value for February and the little-smoothed value for January are right back near normal.

Daily minimum temperature

Winter daily minimum anomalies remained little below the peak of December 2009. Later values traced an arc through the “Equable” zone of the graph, until February’s raw value was again near the December 2009 peak (“Hot Days; Hot Nights”).

Subsoil temperature

The winter subsoil temperature anomaly was below zero and falling quite rapidly. It then accelerated downwards to an apparent negative extreme in November 2010. By February, the raw value was back higher than any point on the 3-year trace.

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.

Warm February 2011 with a very wet day

Posted in Manilla NSW, Monthly weather by

The daily weather logWeather log February 2011.

Several Mondays and Tuesdays this month were cool, while most other days were warm. Nights in the first week were warm, lifting the seven-day average. Three nights in the last week were very cool, at a time of very dry air.
Rain on the 7th (15.4 mm) ended a three-week dry spell, but really heavy rain was recorded on the 14th. That reading of 74.2 mm was the 29th heaviest daily fall in more than a century.

 Comparing February monthsClimate February 2011.

Mean maximum, mean, and minimum temperatures and mean soil temperature were all about a degree above average. The mean Dew Point was average, and cloudiness high (54%).
The rainfall of 102.6 mm is in the 77th percentile for February, far above the long-term average of 67 mm. Rainfall totals for groups of months are very high: above the 70th percentile for all periods up to 15 months, and above the 90th percentile for periods of 4-, 5-, and 6-months.

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.