Massive duststorm chokes eastern Australia; Atlanta floods ease

By: Dr. Jeff Masters , 2:22 PM GMT on September 23, 2009

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A massive dust storm swept through eastern Australia today, turning the skies in Sydney a eerie shade of red-orange. The dust storm was reportedly the worst since the 1940s, and Sydney recorded its highest levels of particulate air pollution ever. The dust storm resulted from strong winds associated with a powerful low pressure system that swept through eastern Australia this morning. Winds today at the Sydney airport were sustained at 36 mph, gusting to 51 mph. Wind gusts as high as 64 mph were recorded in the Sydney area as the storm's strong cold front passed through. Particulate pollution levels are still in the hazardous range this evening in Sydney, but are expected to improve to the "good" range on Thursday as the winds die down and the dust storm dissipates.


Figure 1.. Strong northwesterly winds carry dust over Sydney, Australia, at 00 UTC 9/23/2009. Image credit: NASA.


Figure 2.. A strong cold front passing through eastern Australia this morning generated a sustained winds in excess of 20 mph over a large portion of the region.

Severe drought has affected large regions of Southeast Australia over the past three years (Figure 3). In isolated areas near Melbourne, the drought is the worst on record. The resulting loss of vegetation has created large regions of loose dust, which the strong winds from this week's storm was able to loft in the air and transport long distances.


Figure 3.. Rainfall deficiencies for Australia for the past three years. Image credit: Australian Bureau of Meteorology.

Atlanta floods ease
Very heavy rains exceeding fifteen inches soaked the Atlanta, Georgia region early this week, triggering widespread major flooding that continues today. Rainfall eased yesterday, and all of the rivers in the Atlanta area have crested and are now falling. Record flood levels were observed on at least seven rivers and creeks in the Atlanta area yesterday, breaking records that had been set as long ago as 1919. Utoy Creek near Atlanta broke its previous flood record by nearly 11 feet on Tuesday. The floods have killed at least nine people and did $250 million in damage. Portlight.org is experimenting with a new disaster relief strategy for this flood--they have decided to adopt a single family to help, the Baxter family of Lithia Springs, Georgia. The Baxters lost their home, car, furniture, clothes, and everything else in their house, and need assistance to defray the short-term expenses of lodging, food, and clothing, so help out if you can.


Figure 4. Radar estimated rainfall for the Atlanta, Georgia region ending on September 22. More than 15 inches (white colors) had fallen in and around Atlanta.

There are no threat areas in the Atlantic to discuss today, and none of our reliable computer models are forecasting tropical storm development over the next seven days.

Jeff Masters

Parkinson Avenue 06:15 (LNRSYDNEY)
Unusual sunrise 1
Parkinson Avenue 06:15

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That carribean blob is probably too close to land, but that new blob in the atlantic(west of the lesser antilles) looks interesting, lets see if it stays looking nice.
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Somebody posted something near Brownsville earlier that looked interesting too.


But "none of our reliable models" forecast anything happening in the next 7 days.
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Quoting Chicklit:
Here's the loop to the Caribbean blob.

Link

Anyone have any idea where that AOI will go?
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Quoting Canekid98:
nice pic of rita... lol she dident do anything to us


She gave me my name. Lol.
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nice pic of rita... lol she dident do anything to us
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Quoting wunderkidcayman:

I thought it was the "F" named storms that tend to go to Fl
well... remember Gordon in 2000 and Gabrielle the yr. after.
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Quoting Skyepony:


Krueger sounds about right.. Had the Fred-ex wave axis around 5am this morning. Frequent cloud to ground intense lightning. The kind in a tropical wannabe, lacked the totally fogged windows.

The lightning...That is a clear sign that there was no warm core aloft, actually.
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Here's the loop to the Caribbean blob.

Link
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And this time 4 years ago...
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Quoting Chicklit:

I wouldn't say there's nuthin' going on.


It is the 22nd of September.
Both areas look very volatile and the one in the Caribbean is to close for comfort for me.
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rofl u 2
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Quoting wunderkidcayman:

some can some can't


I think I said that when I said a lot of people cant handle one, which means that some can, right?
Member Since: June 28, 2006 Posts: 24 Comments: 8201
Quoting Chicklit:

I wouldn't say there's nuthin' going on.


It is the 22nd of September.

yes there is somethings alot of somethings compaired to 24-48 hours ago
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Quoting Canekid98:
good evening ladies and gentalmen and homlesswanderer lol jk... whats goin on


Awe Shucks. Never had my own category before. Lol. Good evening.
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wow lol alot
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Quoting GTcooliebai:
The "G" name storm is next on the list. It always seems the west coast of Florida gets the worst of these systems.

I thought it was the "F" named storms that tend to go to Fl
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Quoting Canekid98:
good evening ladies and gentalmen and homlesswanderer lol jk... whats goin on

I wouldn't say there's nuthin' going on.


It is the 23rd of September, actually on these pics, the 24th.
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The "G" name storm is next on the list. It always seems the west coast of Florida gets the worst of these systems.
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Quoting stormwatcherCI:
Current Weather Conditions:
San Andres Isla / Sesquicentenario, Colombia
(SKSP) 12-35N 081-43W 6M

Conditions at

2009.09.24 0100 UTC
Wind Variable at 2 MPH (2 KT)
Visibility greater than 7 mile(s)
Sky conditions overcast
Temperature 82 F (28 C)
Dew Point 78 F (26 C)
Relative Humidity 88%
Pressure (altimeter) 29.75 in. Hg (1007 hPa)
ob SKSP 240100Z VRB02KT 9999 FEW017 OVC200 28/26 A2975


it seems that as the hours go by it get more interesting
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wow comon guys it is uieter in this blog todY THAN IN APRIL! comon crank it up
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Quoting wunderkidcayman:

some can some can't
Current Weather Conditions:
San Andres Isla / Sesquicentenario, Colombia
(SKSP) 12-35N 081-43W 6M

Conditions at

2009.09.24 0100 UTC
Wind Variable at 2 MPH (2 KT)
Visibility greater than 7 mile(s)
Sky conditions overcast
Temperature 82 F (28 C)
Dew Point 78 F (26 C)
Relative Humidity 88%
Pressure (altimeter) 29.75 in. Hg (1007 hPa)
ob SKSP 240100Z VRB02KT 9999 FEW017 OVC200 28/26 A2975
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good evening ladies and gentalmen and homlesswanderer lol jk... whats goin on
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Quoting wunderkidcayman:

at the most a weak Cat 1 but you know how bad the economy is now I don't think cayman can handle a Cat 3
I know. I work for government and we were not even sure if we were going to get paid this month.
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Quoting tornadodude:


I'm thinking a lot of people cant handle a hurricane of any strength right now

some can some can't
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406. Skyepony (Mod)
Quoting Progster:


Looking at the MIMIC TPW, you could argue the convection moving west off Fla's SW coast is a consequence of some fred energy.

Link

If it comes back it should be TS Krueger.


Krueger sounds about right.. Had the Fred-ex wave axis around 5am this morning. Frequent cloud to ground intense lightning. The kind in a tropical wannabe, lacked the totally fogged windows.
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Quoting Chicklit:

Yeah, when his southern remains made 'landfall' in New Smyrna during the morning doggie walk there were a couple of thunder boomers in the distance, but for some mysterious reason it wasn't raining...


Got a whole inch of rain here in Central Brevard. It did come down pretty hard about 2am. So glad we will not have to hear about FredEx anymore.
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Quoting presslord:
...well...I lived thru ex-Fred today...I can hardly describe the horror...

Yeah, when his southern remains made 'landfall' in New Smyrna during the morning doggie walk there were a couple of thunder boomers in the distance, but for some mysterious reason it wasn't raining...
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Quoting wunderkidcayman:

at the most a weak Cat 1 but you know how bad the economy is now I don't think cayman can handle a Cat 3


I'm thinking a lot of people cant handle a hurricane of any strength right now
Member Since: June 28, 2006 Posts: 24 Comments: 8201
About this time of year, some doomcaster (in Florida) throws up this track. I just figured I'd head that off before they do it. ENSO 1921? SOI
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Quoting stormwatcherCI:
You better pray weaker if anything develops.

at the most a weak Cat 1 but you know how bad the economy is now I don't think cayman can handle a Cat 3
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Quoting KerryInNOLA:
O where O where have the wishcasters gone?? O whehe O where could they be ?? This blog is really dead without all their loony talk.


I think I saw them here today. They were saying how next year (2010) will be a monster storm year because of El Nino going bye bye.

Time will tell.
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ex-Fred cancelled my wife's golf game....which put her in a really foul mood...like I said: horro...
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Quoting presslord:
...well...I lived thru ex-Fred today...I can hardly describe the horror...


I actually think we had a gust of very humid air at about 2 pm that was clocked at 4 kts.
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Quoting GatorWX:


interesting!!!!! hadn't noticed that, thanks for posting


You're welcome. :)

They've been saying there might be one developing.

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
255 PM EDT WED SEP 23 2009

GULF OF MEXICO...
A COLD FRONT CURRENTLY OVER THE EXTREME NW WATERS FROM ABOUT
MORGAN CITY LA TO THE MEXICAN COAST ALONG 25N. UPPER SUPPORT IS
FORECAST TO DRAG THE N PORTION OF THE FRONT E ALONG THE N GULF
COAST...WHILE THE SRN PORTION DIVES S INTO THE FAR SW
GULF...WITH NLY FLOW OF 20 KT AND POCKETS TO 25 KT BEHIND THE
FRONT AND W OF 96W. THE N PORTIONS WILL THEN MEANDER OVER THE N
AND W PORTIONS AND IT IS POSSIBLE A FRONTAL WAVE/LOW MAY DEVELOP
ALONG THE BOUNDARY NEAR 28N WED NIGHT OR THU MORNING.
A QUIKSCAT
PASS THIS MORNING REVEALED N-NE WINDS 20-25 KT JUST BEHIND THE
FRONT...WITH BUOYS CURRENTLY SHOWING 20 KT. ELY FLOW ACROSS THE
REMAINDER OF THE GULF IS PRODUCING MODEST SEAS...BUT WERE 15-20
KT THROUGH THE STRAITS OF FLORIDA TO N OF THE YUCATAN...
GENERATING SEAS 5 FT. WINDS ACROSS THE GULF E OF THE FRONT WILL
WEAKEN NEXT 48 HOURS AND THE FRONT PROGRESSES AND THEN STALLS.

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Quoting wunderkidcayman:

yes my weather station was reading 1007.5 mb around 400-430 our time I am watching this one closely might do something like paloma but weaker
You better pray weaker if anything develops.
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Quoting presslord:
...well...I lived thru ex-Fred today...I can hardly describe the horror...
did you have your flashlights and batteries ready to spring into action
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Quoting Skyepony:


Yes with his remains mixed with another feature & his low pressure dissipated over land, if this trough formed into a TS it shouldn't be named Fred.


Looking at the MIMIC TPW, you could argue the convection moving west off Fla's SW coast is a consequence of some fred energy.

Link

If it comes back it should be TS Krueger.
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...well...I lived thru ex-Fred today...I can hardly describe the horror...
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Evening everyone...

Anyone have any ideas on what if anything is going on with the blob east of Honduras and Nicaragua?
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Quoting Chicklit:
There are no threat areas in the Atlantic to discuss today, and none of our reliable computer models are forecasting tropical storm development over the next seven days.
Jeff Masters


How about the unreliable models?



...sorry chick...I haven't seen stormtop in a while...
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Quoting KerryInNOLA:
O where O where have the wishcasters gone?? O whehe O where could they be ?? This blog is really dead without all their loony talk.
they could be out reviewing the flush models for updated information
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Quoting presslord:
We have about $500 in hand for the Baxters...and about $2000 pledged...plus a bunch of goodies....Y'all rock!

www.portlight.org

Portlight WU Featured Blog has all the scoop
this is a good thing
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There are no threat areas in the Atlantic to discuss today, and none of our reliable computer models are forecasting tropical storm development over the next seven days.
Jeff Masters


How about the unreliable models?
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Quoting homelesswanderer:
Good evening all. Wouldn't give up on this season quite yet. Wasn't there mention of a homegrown threat. Possibly from a stalled front.



interesting!!!!! hadn't noticed that, thanks for posting
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guys we will likely to see at least 3 yellow circles by tomrrow
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Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.