TOP OF PAGE High pressure systems centred consistently below
the level of Tasmania helped keep us in a S/SE airstream. The result
of this was one of the coolest January's ever with Mount Gambier, Keith,
Edinburgh and Warooka recording their coolest January on record. I recorded
only 2 days exceeding 30 degrees for January. The average Max
was 22.9 and the average min an amazing 9.9! Not once did the minimum
temp rise above 15 degrees. The data and graph below tells the story.
Take note of the last 5 days of Jan and first 2 days of Feb where the
maximum temp hovered around 18 degrees for a full 7 days!!!
The cool spell ended in Feb when the temps returned to a normal summer.
TOP OF PAGE As often happens a night time wind change to
the north raises temps. Then when the sun breaks the horizon things
start to heat quite rapidly. Nothing unusual, but then at around 8:30am
the wind swung around to the SE. Not a slowish change, but a sudden
abrupt "snap" to a howling S/Easterly. The result was plummet
in temps of around 3 degrees in half an hour. Then as fast as
it came the SE wind swung back to the NW. No transition, just instant
change. Again the temps followed this time rising 9 degreees in an hour
and a half. Then you guessed it the wind changed again and the temp
plummeted 7 degrees in an hour. This happened twice more during the
course of the day before finally the S-Easterly set in around 5:00pm and
the temp plummeted 5.5 degrees in half an hour and a total of 16.5
degrees in 4 hours before stabilising! A 19.2 degree temp variation,
one hell of an unusual day. The graphs from the WX below display the
days unusual conditions.
Feb
Heat 2004
TOP OF PAGE In contrast to Jan, conditions did a total flip
and the heat rolled in. Well, records are made to be broken and broken
they were throught southern Australia. Too many records were broken
to list them all here so I will concentrate on our local area for now..
Januarys cool carried over
for the first few days then it all changed with 4 days above 30
degrees. A slight respite, then the heat returned culminating with
a day of extreme fire danger and top temp of 39 degrees on the 14th.
Hot indeed for us. Even more scorching was temperatures recorded
from other areas of the state on this day. A few stations broke
their feb records as can be seen in the next column:
Febuary
Records (cont)
Port Lincoln 44.2 (previously 43.4, 3/2/1993)
Snowtown 45.2 (44.8, 16/2/1983)
Adelaide 44.3 (43.4, 1912 and 1981)
Nuriootpa 43.0 (42.1, 20/2/1980)
I had reports of 49 degrees from Copeville in
the Mallee!!
The next day a "cool" change bought
relief for us but most of the state continued to cook under plus
40 degree temps, including Adelaide. So many records were set
for Feb. It really was an amazing month. Here are a few more stats........
Adelaide : 15 consecutive days over 30 -
breaking the record of 14 set in 1930 and 1956.
Adelaide : 8 successive days over 35, equalling
the existing record.
Oodnadatta - 8 consecutive nights over 30
equals the record set on 30/12/2003-5/1/2004, but prior to this
year the record was 4. (Too damn hot!)
One amazing month for all of Southern Australia.
Night
time temp rise 1st March 2004
TOP OF PAGE After a warmish. the usual evening sea breeze
kicked in cooling temps and raising humidity. The normal state of affairs
you could say. Early morning all that changed as the N/Westerly took
over and totally reversed conditions. Quite a temp rise in the middle
of the night!!
Warm
and Dusty March 2004
TOP OF PAGE Not what the doctor ordered was an extended dry
spell for more than 2 weeks in March. To make matters worse was warm
to hot temperatures culminating in a very hot night on the 27th where
the temp did not drop below 20 degrees. Very warm indeed for this time
of year. Some centres like Noarlunga did not drop below 26 degrees and
in fact hovered above 28 degrees for most of the night
We were
actually the lucky ones in the eastern Ranges with some dews heavy
enough to register. Morning fogs kept things fresh, but it soon
burns off. But it was not just South Australia suffering these conditions.
The WHOLE of southern Australia, from Perth, sweltering in 40+ degree
heat to Melbourne. The dominating highs kept half a continent under
their influence for this extended period. Disturbing start to the
year.