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Offline Colmait  
#341 Posted : Sunday, 22 September 2019 6:45:15 PM(UTC)
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Ken was talking about the great dust storm of 2009. I will post here and over in the general weather thread.
This was the 23 September 2009 and the photos are as the day progressed. https://www.weatherforum.../t67-The-2009-Dust-Storm Be great if anyone help can build that thread. I will try and add the reports from BoM to it. It is a pretty big PDF for the East Coast especially Sydney.
7C26C59D-0EAD-4016-9A2F-3B9840D86BDC.jpeg34D825FD-CD82-4D0B-BF11-9513F03665B5.jpegA3A69E86-9308-4137-AFBD-0AC3FC43256A.jpeg3B64131A-C9F7-4C27-9818-7999D900C396.jpeg009393F3-2F2B-40A3-A03D-2E3ED03B7D95.jpeg

Edited by user Sunday, 22 September 2019 9:46:07 PM(UTC)  | Reason: Added some information to help build the general weather thread for the event

Colin Maitland.
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Offline crikey  
#342 Posted : Sunday, 22 September 2019 6:58:34 PM(UTC)
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Wow . Thanks for the feast Colin.

ACC g which is no doubt the Met eye forecast?

Shows a tropical dip in isobars in mid W QLD on thursday and on friday the rain signal appears as a patch on the border of the trough line which seems to enhance saturday afternoon

Noting the generally very dry trough in Eastern Australia in NSW.No tropical infeed here.,But cfr some reason ACCESS likes the conditions in SEQ .

Friday and saturday arvo look splendid at +150hrs. I am thinking ACCESS might like the moist onshore flow from the coral feeding in to this surface trough.



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Offline Ken  
#343 Posted : Sunday, 22 September 2019 7:02:39 PM(UTC)
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Originally Posted by: crikey Go to Quoted Post
[b]Wow . Thanks for the feast Colin.

ACC g which is no doubt the Met eye forecast?

Generally speaking, the forecasts you see in Meteye are the end result of various model data that's been manually adjusted by forecasters to form the official forecast grids for various parameters.

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Offline crikey  
#344 Posted : Sunday, 22 September 2019 7:14:55 PM(UTC)
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Originally Posted by: Ken Go to Quoted Post
Originally Posted by: crikey Go to Quoted Post
Wow . Thanks for the feast Colin.

ACC g which is no doubt the Met eye forecast?

Generally speaking, the forecasts you see in Meteye are the end result of various model data that's been manually adjusted by forecasters to form the official forecast grids for various parameters.





[b]Thanks for that information Ken. I didn't know that.
Smile

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Offline Ken  
#345 Posted : Sunday, 22 September 2019 7:46:18 PM(UTC)
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No worries crikey :) And nice pics Colin. I'll have to try and dig mine out of my folders on my computer as well.
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Offline Ken  
#346 Posted : Sunday, 22 September 2019 7:48:07 PM(UTC)
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And who could forget the amazing MODIS imagery (above) from the 2009 dust storms.
The 1st image is where the dust was by the next day on the 24th Sep (it tainted snow cover in New Zealand) while the rest are from the 23rd Sep including a graph of Brisbane's air quality index in terms of the 24hr running average of PM10 particle (such as that in dust) concentrations.
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Offline thunderman  
#347 Posted : Sunday, 22 September 2019 8:02:41 PM(UTC)
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That is the most amazing satellite pictures l have ever seen. !!!BigGrin BigGrin

Well thanks for pulling those out of the archives.


Of course when the weather is dull we go exploring ..

Edited by user Sunday, 22 September 2019 8:04:49 PM(UTC)  | Reason: Not specified

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Offline Pabloako  
#348 Posted : Sunday, 22 September 2019 8:58:52 PM(UTC)
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Wonderful satellite images from 10 years ago. I love the air quality index graph. Literally shoots off ot the chart.
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Offline Colmait  
#349 Posted : Sunday, 22 September 2019 9:52:04 PM(UTC)
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Originally Posted by: Ken Go to Quoted Post
No worries crikey :) And nice pics Colin. I'll have to try and dig mine out of my folders on my computer as well.


Thanks Ken. I am trying to build a special thread with a technical report for the 2009 event over in the general weather area.

https://www.weatherforum.../t67-The-2009-Dust-Storm

The report from BoM for the Southeast of Australia is a pretty big PDF file and I need some time to gather some of the main points. Be great if anyone would like to add pictures and reports etc.

Yes the μg/m3 readings were unbelievably. Recently Birdsville was having some pretty bad dust storms and the readings were around 1350μg/m3 but I believe Randwick in Sydney recorded over 17000μg/m3. It was a record. I think Brisbane we were up around 9000+ μg/m3 but I need to go through and double check those figures . It was staggering though.
Cheers
Colin.

Edited by user Sunday, 22 September 2019 10:01:13 PM(UTC)  | Reason: Not specified

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Offline Falling_Droplet  
#350 Posted : Sunday, 22 September 2019 10:05:11 PM(UTC)
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Slightly warmer today but remaining near average, though the apparent temperature was near the temperature for a longer part of the day rather than a bit below it like it was yesterday. Near average dew point and have been stable in the last few hours. Near average relative humidity. N to NE winds today with some NE to ESE winds. A N breeze is continuing at present.
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Offline retired weather man  
#351 Posted : Monday, 23 September 2019 7:26:54 AM(UTC)
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WYNNUM NORTH ( 27.4S 153.2E ) - WEATHER

DATE....23 SEP 2019...TIME...0720

CURRENT TEMPERATURE...18.6C
CURRENT HUMIDITY........84%
CURRENT DEW POINT.......16C
CURRENT WIND DIR/SPEED...NNW 8kph
CURRENT VISIBILITY.....25KM
CURRENT MSL PRESSURE...1024.9Hpa
CURRENT CLOUD..........1/8 Ac
CURRENT WEATHER......No significant weather
RAIN SINCE 0900 SUNDAY..0.0mm

SUMMARY LAST 24 HOURS
YESTERDAY'S MAX TEMP. .......25.6C
THIS MORNING'S MIN TEMP......15.6C
PAST 24 HOURS TEMP ANOMALY..+2.00C
THIS MORNING'S GRASS MIN.....13.5C
AVERAGE 24 HOUR DEW POINT......16C
AVERAGE 24 HOUR MSLP........1024.6Hpa
MAX WIND GUST LAST 24 HOURS....NE 33Kph at 1158
PAST 24 HR SIGNIFICANT WEATHER..No significant weather.
Wyn Nth 2020-Jan165,
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Offline Falling_Droplet  
#352 Posted : Monday, 23 September 2019 8:05:19 AM(UTC)
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Ferny Grove Weather
Date: 23 Sep 2019
Time: 7:45 AM

Min Temp since 9am yesterday: 13.2 C
Max Temp since 9am yesterday: 28.3 C
Min Ground Temp: 11.5 C
Rain since 9am yesterday: 0.1 mm (dew)

Temperature: 19.5 C
Relative Humidity: 74 %
Dew Point: 14.7 C
MSL Pressure: 1024.6 hPa
Wind Speed: 3 kph - light air
Wind Direction: NNW

Present Weather: No cloud development observed
Visibility: 20km to 39km - Very Good Visibility
Cloud Cover: 0/8
Ground State: Ground moist

Notes of yesterday weather - 22/9/19: Fine and partly cloudy with cu clouds reducing in the afternoon. Variable temperature from mid morning and in the early afternoon. Near average dew point which rose and fell several times in the morning and afternoon. In the early hours the dew point was stable, fell slowly in the evening and in the mid morning the dew point became moderately high. Near average relative humidity. Light and variable winds at times early becoming light NNW to NE from mid morning, NE to ESE from late morning, E to NE in the afternoon and NNW to NE from late afternoon.

Today: Near average dew point fell before rising from 5 am while remaining near average. Near average relative humidity. Light N to NW winds at times today and otherwise calm.
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Offline Falling_Droplet  
#353 Posted : Monday, 23 September 2019 9:49:07 PM(UTC)
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A partly cloudy and hot day. Light NW to NE winds with some W to NW winds, SE to NE in the afternoon and now is calm. Relative humidity was a bit lower today (minimum of 25%) being moderately low and near average currently. Dew point fell a bit for some of today but remained near average.

So far this month anomaly from average:
MTD 09-23-2019.PNG

Last 24 hours:


temp 2019-09-23.PNGhum 2019-09-23.PNGwind dir 2019-09-23.PNG

Edited by user Monday, 23 September 2019 10:02:38 PM(UTC)  | Reason: Not specified

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Offline Colmait  
#354 Posted : Tuesday, 24 September 2019 6:22:02 AM(UTC)
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This was from a post I made in 2009 on the Australian Severe weather forum. I think the post was from the 19 -27 of September. It is worth a read. It was full on right around Australia.

As at 3.27pm Tuesday 22/09/09 I counted 39 weather warnings for Australia. It is quite an eventful day. I have posted an WZ map to try and give an idea of what is happening.

There is storms, dust storms, strong winds, cold fronts, fire especially in QLD and the list goes on.

Col

An older version of storm tracker.

B3CAD749-A490-480E-9E1D-9B72F5244C69.png

Very interesting the similarities 10 years ago.
http://www.australiaseve...m/index.php?topic=5372.0

Edited by user Tuesday, 24 September 2019 6:25:49 AM(UTC)  | Reason: Not specified

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Offline retired weather man  
#355 Posted : Tuesday, 24 September 2019 7:23:22 AM(UTC)
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WYNNUM NORTH ( 27.4S 153.2E ) - WEATHER

DATE....24 SEP 2019...TIME...0720

CURRENT TEMPERATURE...18.9C
CURRENT HUMIDITY........79%
CURRENT DEW POINT.......15C
CURRENT WIND DIR/SPEED...SE 12kph
CURRENT VISIBILITY.....30KM
CURRENT MSL PRESSURE...1024.9Hpa
CURRENT CLOUD..........1/8 Cu, 4/8 Ci
CURRENT WEATHER......No significant weather
RAIN SINCE 0900 MONDAY..0.0mm

SUMMARY LAST 24 HOURS
YESTERDAY'S MAX TEMP. .......27.0C
THIS MORNING'S MIN TEMP......15.8C
PAST 24 HOURS TEMP ANOMALY..+2.80C
THIS MORNING'S GRASS MIN.....14.0C
AVERAGE 24 HOUR DEW POINT......17C
AVERAGE 24 HOUR MSLP........1021.6Hpa
MAX WIND GUST LAST 24 HOURS....NE 37Kph at 1615
PAST 24 HR SIGNIFICANT WEATHER..No significant weather.
Wyn Nth 2020-Jan165,
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Offline Falling_Droplet  
#356 Posted : Tuesday, 24 September 2019 8:03:23 AM(UTC)
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Ferny Grove Weather
Date: 24 Sep 2019
Time: 7:45 AM

Min Temp since 9am yesterday: 15 C
Max Temp since 9am yesterday: 32.5 C
Min Ground Temp: 12.8 C
Rain since 9am yesterday: 0 mm

Temperature: 19.9 C
Relative Humidity: 60 %
Dew Point: 11.9 C
MSL Pressure: 1025.1 hPa
Wind Speed: 6 kph - light breeze
Wind Direction: NNW

Present Weather: Clouds generally dissolving or becoming less developed during the preceding hour
Visibility: 20km to 39km - Very Good Visibility
Cloud Cover: 2/8
Ground State: Ground dry

Notes of yesterday weather -
22/9/19: Fine. Partly cloudy with some ac clouds in the morning with cu clouds developing from the morning easing later in the afternoon. A hot day. The temperature was variable from later in the morning and in the afternoon. A small rise in the temperature in the late evening with a wind change. Near average dew point falling slowly in the early hours and in the evening. Between the early morning and mid afternoon the dew point rose, fell and rose again while remaining near average. Moderately low daytime relative humidity. Light WNW to NW winds in the early hours, NW to NE winds from the early morning with some WSW to NW winds before E to SE winds in the afternoon, E to NE in the late afternoon (with a rise in dew point) and became calm in the evening. A SSW to SW wind change at 11 pm.

Today: Ci clouds with some cu clouds developing so far today. The temperature have been stable for some of the time before rising since 6 am. Near average dew point have fallen slowly and have been rising since 6 am and have started to slowly fall again. Moderately low relative humidity. Between 12:45 am and 1:45 am the relative humidity fell (while the temperature was stable) before resuming the standard rise as the temperature falls. Light WSW to S winds most of the day so far.
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Offline CantSpellNarangba  
#357 Posted : Tuesday, 24 September 2019 2:43:32 PM(UTC)
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It is a bit hard to describe today, apart from the word yuck.
A few sunny spells, followed by cloud, followed by "it looks like it might rain", followed by a sunny spell again.
Temperature wise it isn't too wonderful either and current 23°C here.
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Offline DelBoy  
#358 Posted : Tuesday, 24 September 2019 6:22:27 PM(UTC)
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Originally Posted by: CantSpellNarangba Go to Quoted Post
It is a bit hard to describe today, apart from the word yuck.
A few sunny spells, followed by cloud, followed by "it looks like it might rain", followed by a sunny spell again.
Temperature wise it isn't too wonderful either and current 23°C here.


I agree there. I have been looking at a few forecast charts and they keep chopping and changing. One moment they say some rain for later this week and then the next run, they say next to nothing.
:-(

Hopefully Ken, Colin or Crikey come along with some charts that makes us "rain wishers" happy.
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Offline crikey  
#359 Posted : Tuesday, 24 September 2019 7:03:43 PM(UTC)
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Originally Posted by: DelBoy Go to Quoted Post
Originally Posted by: CantSpellNarangba Go to Quoted Post
It is a bit hard to describe today, apart from the word yuck.
A few sunny spells, followed by cloud, followed by "it looks like it might rain", followed by a sunny spell again.
Temperature wise it isn't too wonderful either and current 23°C here.


I agree there. I have been looking at a few forecast charts and they keep chopping and changing. One moment they say some rain for later this week and then the next run, they say next to nothing.
:-(

Hopefully Ken, Colin or Crikey come along with some charts that makes us "rain wishers" happy.


I started a thread on this event which could run every afternoon for 4days

here
https://www.weatherforum...d-rain-26-30th-Sept-2019

Friday and monday coming up are the looking the best on ACC so far.

will post some updates tomorrow. Feel free to post your model finds there delboy . I always enjoy the model dancing

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Offline Falling_Droplet  
#360 Posted : Tuesday, 24 September 2019 9:45:10 PM(UTC)
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Passing periods of sunshine caused the temperature to rose and fall 9 times in the morning and afternoon with typical temperature for the day. From the early morning the dew point fell before rising slowly and have stabilised in the last few hours. Relative humidity also jumped up and down in the morning and afternoon close to average and is moderately low presently. Winds have been mostly light E to SE, and now is calm.

Last 24 hours:

hum 2019-09-24.PNGtemp 2019-09-24.PNG
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