Tag Archives: July

3-year trends to July 2020

Posted in 3-year climate trends, Manilla NSW by

July: warm and humid

3-year climate trends to July 2020 at Manilla

July raw anomaly data (orange)

Temperatures

Daily maximum temperature anomaly (all x-axes), remained near +1 deg.
Daily minimum temperature anomaly (lower left): rose very high (+2.5 deg).
Subsoil temperature anomaly (lower right): remained very high.

Moistures (moist is at the bottom)

Rainfall anomaly (upper left) just below normal.
Cloudiness anomaly (upper right): near normal.
Dew point anomaly (middle left): just above normal.
Daily temperature range anomaly (middle right) low (humid).

 Fully smoothed data values (red) 

Fully-smoothed data for January 2020 shows that the daily maximum temperature anomaly continued to fall from the record value of October 2019. The daily minimum and subsoil values were static.
All the moisture indicators (rainfall, cloud, dew point, and daily temperature range) continued to move downward, showing decreasing drought.

Notes:

January data points are marked by squares.

Smoothing Continue reading →

July 2020: warm and humid

Posted in Manilla NSW, Monthly weather by

Weather log for July 2020

Repeating the pattern of June, the second week of July was 3° above normal. Again, one night (11th) was remarkably high above normal (9.8°). The final week was also warm.
There were 14 frosts (normally 17), but the number of cloudless days (5) was equal lowest for July.
Seven days registered rain above 0.2 mm, the highest being 10.4 mm on the 27th.

Manilla weather log July 2020

Comparing July months

The mean monthly temperature of 11.1° was the same as last year: only 0.3° lower than the warmest July (11.4° in 2013). However, days were rather cool (18.0°), while nights (4.3°) were the 2nd warmest for July. The resulting daily temperature range of 13.7° was narrower than normal. That suggests humidity, agreeing with a high dew point (3.2°) and cloudiness (39%).
The rainfall total of 31.3 mm, being at the 44th percentile, is still well below the July average (41 mm). However, no July rainfall has been much higher at Manilla in eight years (91.4 mm in 2012).

Manilla climate July 2020

Drought

I will report separately on the on-going drought, that still breaks low-rainfall records.

Data. A Bureau of Meteorology automatic rain gauge operates in the museum yard. From 17 March 2017, 9 am daily readings are published as Manilla Museum, Station 55312.  These reports use that rainfall data when it is available. Recording resumed on 20 July 2019. The gauge failed again during February (25/02/2020 ), but was repaired on 11/3/20.
My estimates of early morning dew point have drifted anomalously low. From August 2019, I use data from the Tamworth Airport published graphs.
All other data, including subsoil at 750 mm, are from 3 Monash Street, Manilla.

July 2019 had the warmest days

Posted in Manilla NSW, Monthly weather by
Ruby Saltbush Enchylaena tomentosa

Drought-proof Ruby Saltbush

Only the middle week of July was not warmer than normal. Nearly all days and nights were above average for this coldest time of the year, but none was exceptional. No night minimum was as warm as ten degrees. There were 15 frosts (normally 17), but, as happened in July 2009 and 2010, there were no severe frosts reading below minus two degrees in the screen.
Rain was recorded on the 8th and 9th, estimated as 5.0 mm and 5.5 mm.

Weather log July 2019

Comparing July months

The last three July months saw maximum, mean, and minimum temperatures steadily rising, with the temperature range (17 deg) staying high. That was not true earlier in the decade: from 2008 to 2012 temperatures were steady and the daily temperature range (14 deg) was low, with cool days and warm nights. It was the case again in July 2015 and 2016, as shown here.
Indicators of moisture were again low, but not as low as in July 2018, with its record low dewpoint and cloudiness. The (estimated) rainfall total of 10.5 mm is at the 14th percentile for July.

Climate at July 2019

Drought

I have reported separately on the on-going drought that continues to break low-rainfall records at durations of 15-months and longer.

Data. A Bureau of Meteorology automatic rain gauge operates in the museum yard. From 17 March 2017, 9 am daily readings are published as Manilla Museum, Station 55312.  These reports use that rainfall data when it is available.  Since no 9 am readings have been recorded since August 2018, I have substituted my non-standard gauge readings for all days.
All other data, including subsoil at 750 mm, are from 3 Monash Street, Manilla.

3-year trends to July 2019

Posted in 3-year climate trends, Manilla NSW by

Record dry and warm (as smoothed)

3-year climate trends to July 2019

July raw anomaly data (orange)

Temperatures

Daily maximum temperature anomaly (all x-axes): above the maximum for smoothed values.
Daily minimum temperature anomaly (lower left): just above the upper limit of normal values.
Subsoil temperature anomaly (lower right): very high.

Moistures (moist is at the bottom)

Rainfall anomaly (upper left): very low.
Cloudiness anomaly (upper right): normal.
Dew point anomaly (middle left): low, like the other recent values.
Daily temperature range anomaly (middle right): very high.

 Latest fully smoothed data (red), January 2019

Temperatures

Daily maximum temperature was a new record positive value of +1.79 deg, beating +1.62 deg set in March and December 2018.
Daily minimum temperature set a new record of +2.18 deg, beating +1.98 deg set the previous month.
Subsoil was normal due to phase lag.

Moistures (moist is at the bottom)

Rainfall smoothed anomaly was a new 136-year record value of minus 31.75 mm per month, breaking the record of minus 30.8 mm set the previous month.
Cloudiness was normal.
Dew point was low.
Daily temperature range was normal.

Notes:

January data points are marked by squares.

Smoothing Continue reading →

July 2018 had deep frosts

Posted in Manilla NSW, Monthly weather by
A young kurrajong tree

Kurrajong in Drought

There were warm spells at each end of the month. Between them, fine cool weather was marked by black frosts with temperatures down to -4.6°. That is colder than had been seen in the sixteen years since 2002. With the freezing nights came extremely low early-morning dew points that beat the previous record value of -10.0°. The new dew point record set on the 22nd was -11.4°.
Six days had light rain. The wettest, on the 6th, registered only 3.2 mm (estimated).

Weather log July 2018

Comparing July months

Despite two nights being below -4°, the number of frosts (17) was normal, as was the mean daily minimum temperature (1.8°). Days, however, set a record mean maximum of 19.2°, making the daily temperature range (17.4°) very high. Other variables were also typical of drought: both cloudy skies (only 19%), and the early morning dew point (-4.0°) were record low values for July. This month was very like July in the drought year of 2002.

The rainfall total of 8.6 mm (estimated) was at the 12th percentile. Persistent low monthly rainfall values have carried the 3-, 4-, and 5-month totals down well below the 1st percentile that marks extreme rainfall shortage. Other totals now classed as “severe shortages” include the six-year total.

Climate in July months

Developing Drought

The rainfall shortages that have now become extreme are covered in other posts, such as “Drought Fifth Month: July 2018”.

Data. A Bureau of Meteorology automatic rain gauge operates in the museum yard. From 17 March 2017, 9 am daily readings are published as Manilla Museum, Station 55312.  These reports use that rainfall data when it is available.  The record was defective for July. Ten daily readings were missing. In addition, 1.0 mm was registered on the 20th when no rain or dew was seen. I have substituted my non-standard gauge readings for all days of July.

All other data, including subsoil at 750 mm, are from 3 Monash Street, Manilla.