Thursday 25 MAY 2017
 

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2017

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National Daily Weather Summary


Records set | Charts | Cities | Hottest | Coldest | Rain, sun & wind | Downpours & gales
State extremes | Noteworthy weather | Capital Cities | Regional Cities | Alpine Stations
Charts and data courtesy Bureau of Meteorology. MTSAT-1R operated by JMA
Noteworthy weather today
significant newsworthy major

The graphics and statistical information on this page fill gradually as they become available, with some not available until the next day. The page is updated every 30 minutes at about 20 and 50 minutes past the hour.

For weather news as it breaks that is tagged and organised, use the links on the Weather and Climate Media Reports page.

Thursday 25 May 2017

Outlook calls for a warm, dry winter

The Bureau of Meteorology seasonal outlook for winter, released today, is forecasting a high probability of above average temperatures and below average rainfall across most of southern Australia grading to close to normal conditions across the northern half where little rain falls anyway during the dry season. Exceptions are the southeast coast and TAS, where rainfall is likely to be closer to average, and the northern half of Cape York Peninsula which can expect above average temperatures.

Driving factors are a warm Pacific Ocean and cool eastern Indian Ocean. The Bureau's climate model is suggesting further Pacific warming is unlikely, which would also reduce the possibility of an El Niño developing. However, the BoM points out that "The majority of international climate models surveyed by the Bureau still suggest El Niño will develop later this year."

An El Niño tends to produce below average winter and spring rainfall in the east of the country and warmer than average daytime temperatures in the south. The BoM says "Some El Niño-like effects may still be felt even if an event doesn't fully develop, but Pacific Ocean temperatures remain warmer than average." The other factor, the cooler than average eastern Indian Ocean, will also reduce the likelihood of much moisture streaming into Australia from the northwest.

The full Outlook is here (archive version here), and a video version is here. The latest fortnightly Bureau ENSO Wrap-Up, issued last Tuesday, is here giving more detail on the current state of the Pacific and Indian Oceans, El Niño and the Indian Ocean Dipole. The Bureau's summary of a number of international climate models is here.

Fog a sign the season's turning

Fog is a sure sign of autumn and that winter is not far away. Over the past week, fog has been widespread across the country following good rain in most areas at the weekend.

Abundant ground moisture, cold, clear and long nights and light winds are perfect conditions for the formation of fog and the country has had no shortage of them since the rain finished and high pressure systems have dominated. Around sunset, the ground begins to reradiate its heat to space, cooling a narrow layer of air immediately above it as well. If the air and ground are moist, the air in this layer soon reaches 100% humidity and a very small inversion layer forms where there is cold air below warm. Air is a poor conductor of heat, so the air above the inversion will remain warm while that below will continue to cool slowly and, if there is no wind, a heavy dew will form instead of fog. But a slight wind - 6 to 10km/h is ideal - will set up turbulence that slowly extends the inversion level upwards and fog will begin to form in a deepening layer of saturated air. This is known as radiation fog.

As the night progresses, the cold, dense air will begin to drain downhill like water, setting up its own light wind and often gradually filling valleys with fog that can be clearly seen on the first satellite images after the sun comes up. Even stronger wind, up to about 20km/h, will continue to mix the fog deeper and deeper, but over this speed the fog usually rises to become low cloud. Soon after sunrise, if the heat of the sun can penetrate, the warming ground also warms the lowest air beginning a process of drying and evaporating the fog from below which appears to make the fog "lift".

Gradually, the ground warmth and developing turbulence will break apart the inversion and the fog will dissipate. Sometimes, though, if the fog has developed to a considerable depth overnight, the sun can't penetrate to begin the warming process until late in the morning when the higher sun will find tiny gaps in the cloud and will also attack the fog around the edges of the main fog area. That happened this morning around and north of Canberra, where a large shield of fog could be seen on the satellite images until early afternoon.

Perth, Adelaide, Launceston, Melbourne, Canberra, Sydney and Brisbane have all experienced fog during the past week with visibility as low as 50m in places. Large areas from the coastal valleys to the inland slopes in the east and the coast to the Great Southern in WA have also had fog. Brisbane had fog on Sunday, Monday and Wednesday, while Perth enjoyed its fog on Tuesday after receiving 48.6mm over the five days to Wednesday 24 May, the heaviest rain by far since an unseasonal dump of 114.4mm on 10 February.


Records set or equalled today

None known


The day in charts
Surface charts Satellite images Rain & temperatures
4am EST Rainfall -- 24 hours to 9am

Week to 9am | SE AUS detail
10am EST Minimum temperature anomalies

See actual temperatures
4pm EST Maximum temperature anomalies

See actual temperatures
10pm EST Solar Radiation

Summary of observations

For notes on how to interpret the data and quality control issues, see Daily Weather Summary Help.
**S** and **W** precede data flagged by the Bureau as suspicious or wrong
Data is as received at 14:02EST, 26/05/2017.

Major centres
Max
° C
+/- norm
° C
Min
° C
+/- norm
° C
Grass Min
° C
Rain to 9am mm Evaporation to 9am mm Sunshine hours Wind Run to 9am km (24-hour average km/h) Maximum Gust km/h / hour of occurrence
PERTH AIRPORT 22.5 +0.7 8.3 -2.1 7.0 0.0 2.0 9.4 241 (10.0) 28/15
BUNBURY 20.9 -0.3 10.0 +0.7 -- 1.4 -- -- 143 ( 6.0) 39/13
MANDURAH 20.1 -1.2 11.8 -1.8 -- 0.2 -- -- 119 ( 5.0) 34/23
DARWIN AIRPORT 33.1 +1.1 22.4 +0.3 21.4 0.0 7.4 11.1 320 (13.3) 46/12
ALICE SPRINGS AIRPORT 27.6 +4.6 10.0 +1.8 -- 0.0 -- -- 299 (12.5) 37/17
WHYALLA AERO 23.0 +2.6 8.2 -0.5 -- 0.0 -- -- 282 (11.8) 28/11
ADELAIDE (KENT TOWN) 20.2 +1.3 10.0 -0.2 -- 0.2 -- -- 132 ( 5.5) 26/13
MOUNT GAMBIER AERO 16.8 +0.7 -- -- -- 0.0 -- -- -- 39/15
MOUNT ISA AERO -- -- 15.2 +1.4 -- 0.0 -- -- 384 (16.0) --
CAIRNS AERO 27.9 +0.3 19.5 -0.4 -- 1.0 -- -- 501 (20.9) 52/11
TOWNSVILLE AERO 28.5 +0.9 16.2 -1.4 -- 0.0 -- -- 264 (11.0) 34/11
MACKAY M.O 25.3 +1.1 15.1 -2.0 -- 0.0 -- -- 317 (13.2) 21/12
ROCKHAMPTON AERO 29.6 +3.6 14.4 +0.3 -- 0.0 -- -- 119 ( 5.0) 21/16
BUNDABERG AERO 26.0 +1.4 14.1 0.0 -- 0.2 -- -- 190 ( 7.9) 30/12
COOLANGATTA 23.8 +0.7 13.4 -0.7 -- 0.0 -- -- 273 (11.4) 39/11
BRISBANE AERO 24.0 +0.5 13.2 +0.4 10.0 0.2 3.8 9.5 277 (11.5) 34/15
TOOWOOMBA AIRPORT 20.7 +0.9 8.9 -0.9 -- 0.0 -- -- 393 (16.4) 43/00
GUNNEDAH RESOURCE CENTRE 19.2 -1.1 6.9 -1.8 4.4 0.0 2.4 -- -- --
PORT MACQUARIE AIRPORT AWS 21.0 -0.4 7.4 -3.0 -- 0.2 -- -- 195 ( 8.1) 22/10
WILLIAMTOWN RAAF 19.9 -0.4 9.5 -0.5 -- 0.0 -- -- 452 (18.8) 31/09
ORANGE AGRICULTURAL INSTITUTE 13.7 -0.5 5.5 +0.9 4.5 0.0 2.6 -- -- --
DUBBO AIRPORT AWS 19.6 -0.3 1.6 -4.9 -- 0.0 -- -- 278 (11.6) 30/13
SYDNEY AIRPORT AMO 20.7 +0.7 12.1 +1.2 9.2 0.2 5.6 9.6 542 (22.6) 39/06
RICHMOND RAAF 20.2 -0.3 4.2 -3.4 -- 0.2 -- -- 235 ( 9.8) 15/13
BELLAMBI AWS 18.8 -0.8 11.4 -1.6 -- 0.0 -- -- 409 (17.0) 30/00
CANBERRA AIRPORT 12.5 -- 0.8 -- -- 0.0 -- -- 337 (14.0) 21/13
WAGGA WAGGA AMO 14.5 -2.8 4.2 -1.6 -- 0.2 -- -- 249 (10.4) 26/14
ALBURY AIRPORT AWS 14.0 -3.6 4.2 -1.2 -- 0.2 -- -- 194 ( 8.1) 21/15
MILDURA AIRPORT 20.9 +1.9 7.9 +0.5 -- 0.0 2.0 -- 173 ( 7.2) 30/14
TATURA INST SUSTAINABLE AG 14.8 -2.4 3.9 -1.8 -- 0.0 -- -- 87 ( 3.6) 17/14
BENDIGO AIRPORT 15.3 -1.3 4.6 -0.5 -- 0.0 -- -- 154 ( 6.4) 28/11
MELBOURNE AIRPORT 17.4 +0.8 11.4 +3.1 8.2 0.0 2.2 1.4 400 (16.7) 43/22
BALLARAT AERODROME 14.0 +0.4 8.4 +2.7 -- 1.0 -- -- 321 (13.4) 39/11
LAUNCESTON (TI TREE BEND) 14.7 -1.1 3.4 -1.6 -- 0.0 -- -- 142 ( 5.9) 34/13
HOBART AIRPORT 15.6 +0.4 9.5 +2.9 5.4 0.0 1.8 0.9 423 (17.6) 37/18
Max
° C
+/- norm
° C
Min
° C
+/- norm
° C
Grass Min
° C
Rain to 9am mm Evaporation to 9am mm Sunshine hours Wind Run to 9am km Maximum Gust km/h / hour of occurrence
Hottest
Highest maximum temperature>Greatest variation above normal maximum Highest minimum temperatureGreatest variation above normal minimum

36.6 MANDORA E Pilbara WA
36.4 FITZROY CROSSING AERO W Kimberley WA
36.2 DERBY AERO W Kimberley WA
36.0 WEST ROEBUCK W Kimberley WA
36.0 BIDYADANGA W Kimberley WA

+4.6 : 27.6 ALICE SPRINGS AIRPORT N Plateau NT
+4.6 : 30.6 BARCALDINE POST OFFICE Central West QLD
+4.6 : 36.6 MANDORA E Pilbara WA
+4.3 : 29.6 TERRITORY GRAPE FARM N Plateau NT
+4.1 : 33.0 CAMOOWEAL TOWNSHIP Northwest QLD
+4.1 : 27.9 MEEKATHARRA AIRPORT E Gascoyne WA

28.0 BROWSE ISLAND Islands ISL
26.8 CAPE WESSEL Islands ISL
26.2 MCCLUER ISLAND N Rivers NT
26.0 ROWLEY SHOALS Islands ISL
26.0 COCOS ISLAND NTC AWS Islands ISL

+6.0 : 15.0 KULGERA N Plateau NT
+5.6 : 14.6 YULARA AIRPORT N Plateau NT
+5.3 : 13.9 CURTIN SPRINGS N Plateau NT
+5.2 : 12.0 COONAWARRA Lower SE SA
+4.8 : 10.8 STAWELL AERODROME Wimmera S VIC

Coldest
Lowest maximum temperatureGreatest variation below normal maximum Lowest minimum temperatureGreatest variation below normal minimum

3.5 MOUNT BULLER Upper NE VIC
4.2 MOUNT HOTHAM Upper NE VIC
5.6 KUNANYI (MOUNT WELLINGTON PINNACLE) Southeast TAS
6.1 MOUNT READ W Coast TAS
6.5 THREDBO AWS Snowy Mtns NSW

-5.2 : 11.3 TUGGERANONG (ISABELLA PLAINS) AWS Goulburn/Monaro NSW
-4.8 : 13.0 COROWA AIRPORT Riverina E NSW
-4.6 : 13.6 YARRAWONGA Upper North VIC
-4.2 : 12.8 RUTHERGLEN RESEARCH Lower NE VIC
-3.8 : 13.8 WANGARATTA AERO Lower NE VIC

-2.8 COOMA AIRPORT AWS Goulburn/Monaro NSW
-2.8 COOMA VISITORS CENTRE Goulburn/Monaro NSW
-2.0 DINNER PLAIN (MOUNT HOTHAM AIRPORT) Upper NE VIC
-2.0 THREDBO VILLAGE Snowy Mtns NSW
-0.6 OMEO Upper NE VIC

-6.3 : 3.2 PAYNES FIND E Gascoyne WA
-6.0 : 11.0 PARDOO STATION E Pilbara WA
-6.0 : 4.5 EUCLA Eucla WA
-5.9 : 2.9 FORREST Eucla WA

Wettest
Sunniest & dullest
Windiest
Highest gusts
Todays highest rainfall totals for the 24 hours to 9am. It includes the top 5 totals nationally followed by all reported falls of 50mm or more.
Highest and lowest recordings of hours of sunshine for the 24 hours to midnight.
Highest wind run totals in kilometres for the 24 hours to 9am (average speed in brackets). All reported runs > =25km/h are shown.
Highest wind gusts in km/h for the 24 hours to midnight followed by the hour in which it occurred. All stations with gusts > 89km/h are shown.
20.8 NORFOLK ISLAND AERO Islands ISL
14.4 LAKE MARGARET POWER STATION W Coast TAS
14.2 LORD HOWE ISLAND AERO Islands ISL
11.6 QUEENSTOWN (SOUTH QUEENSTOWN) W Coast TAS
9.8 INNISFAIL N Coast--Herbert QLD

Reports not yet available

1277 (53.2) MAATSUYKER ISLAND LIGHTHOUSE Southeast TAS
1250 (52.1) HOGAN ISLAND Islands ISL
1079 (45.0) KUNANYI (MOUNT WELLINGTON PINNACLE) Southeast TAS
968 (40.3) CAPE GRIM BAPS (COMPARISON) N Coast TAS
945 (39.4) GABO ISLAND LIGHTHOUSE E Gippsland VIC
895 (37.3) FLINDERS ISLAND AIRPORT Flinders Is/Bass St TAS
884 (36.8) LOW ROCKY POINT W Coast TAS
853 (35.5) THREDBO AWS Snowy Mtns NSW
853 (35.5) WILSONS PROMONTORY LIGHTHOUSE W Gippsland VIC
837 (34.9) WILLIS ISLAND Islands ISL
834 (34.8) HARTZ MOUNTAIN (KEOGHS PIMPLE) Southeast TAS
807 (33.6) LOW HEAD N Coast TAS
805 (33.5) CAPE WESSEL Islands ISL
791 (33.0) LOW ISLES LIGHTHOUSE N Coast--Barron QLD
730 (30.4) COCOS ISLAND AIRPORT Islands ISL
725 (30.2) GREEN CAPE AWS South Coast NSW
716 (29.8) CAPE FLATTERY N Coast--Barron QLD
707 (29.5) NEPTUNE ISLAND W Agricultural SA
707 (29.5) SCOTTS PEAK DAM W Coast TAS
696 (29.0) MCCLUER ISLAND N Rivers NT
683 (28.5) CAPE GRIM N Coast TAS
672 (28.0) CAPE OTWAY LIGHTHOUSE W Coast VIC
650 (27.1) HORN ISLAND N Peninsula QLD
645 (26.9) KING ISLAND AIRPORT King Island TAS
623 (26.0) NORFOLK ISLAND AERO Islands ISL
606 (25.3) COLAC (MOUNT GELLIBRAND) W Coast VIC
94/20 MAATSUYKER ISLAND LIGHTHOUSE Southeast TAS
85/14 SCOTTS PEAK DAM W Coast TAS
83/01 KUNANYI (MOUNT WELLINGTON PINNACLE) Southeast TAS
83/13 LOW ROCKY POINT W Coast TAS
76/19 HOGAN ISLAND Islands ISL

Downpours High AWS wind reports
High rainfall for periods of 6 hours or less from AWS and synoptic reports.
IMPORTANT NOTE: Due to a programming error, downpours shown for WA, NT, SA, QLD and ISLANDS between 9 and 10am local times are wrong and should be ignored. The error will be corrected as soon as possible.
Storm force gusts (>89km/h) and 10-minute mean gales (>62km/h) reported by AWSs. Wind direction and mean windspeed are shown in brackets.
ISLANDS
Islands
LORD HOWE ISLAND AERO
10.6mm in 22 min to 01:00 28.9mm/h
14.2mm in 1 hr to 01:00 14.2mm/h
13.2mm in 1 hr to 01:30 13.2mm/h

TASMANIA
N Coast
CAPE GRIM BAPS (COMPARISON) : 72(240/ 65 ) at 19:49
Southeast
MAATSUYKER ISLAND LIGHTHOUSE : 95(320/ 72 ) at 20:44
KUNANYI (MOUNT WELLINGTON PINNACLE) : 80(250/ 67 ) at 02:00
W Coast
LOW ROCKY POINT : 83(320/ 67 ) at 13:30
SCOTTS PEAK DAM : 85(320/ 67 ) at 14:44
ISLANDS
Islands
HOGAN ISLAND : 76(300/ 63 ) at 19:30
BOUGAINVILLE REEF : 72(130/ 63 ) at 01:20