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Hurricane Season - 91L - Flash Flood Warnings for S. LA, Worst Rain Moving out Later Today
Posted on 5/11/19 at 11:38 am
Posted on 5/11/19 at 11:38 am
This post was edited on 6/6/19 at 8:57 am
Posted on 5/11/19 at 11:48 am to rds dc
Hurricane moving up the Mississippi River drainage basin, that is already at a high level, could be devastating
This post was edited on 5/11/19 at 11:50 am
Posted on 5/11/19 at 11:57 am to rds dc
Just when Punta Cana was getting back on its feet.
Posted on 5/11/19 at 12:01 pm to rds dc
This is Trump's fault, obviously
Posted on 5/11/19 at 12:01 pm to Jim Rockford
So, should I cancel my trip to Fla on the 4th of July?
Posted on 5/11/19 at 12:04 pm to fishfighter
BR schools are already closing next week in anticipation
Posted on 5/11/19 at 12:04 pm to rds dc
Damn. rds doing work early this year
Posted on 5/11/19 at 1:09 pm to VolsOut4Harambe
How will this effect the Georgia southern game?
Posted on 5/11/19 at 1:13 pm to rds dc
I thought hurricane season was over
Posted on 5/11/19 at 1:16 pm to ike221
quote:
Hurricane moving up the Mississippi River drainage basin, that is already at a high level, could be devastating
Thanks for the nightmare, baw.
Posted on 5/11/19 at 1:19 pm to Leon Spinks
quote:
I thought hurricane season was over
Posted on 5/11/19 at 1:33 pm to rds dc
I THINK I REMEMBER THIS!
Last year, I asked what the hell this means. The MJO is the Madden Julian Oscillation, which is a very large scale feature that sets up an area of better than average thunderstorm formation and an area of thunderstorm suppression roughly opposite each other on the planet. So, the rainy part of it would be over the Atlantic while the non-rainy part might be over the Pacific. It circles the Northern tropics in an Eastward direction about every month or two and it varies in strength up and down over time. When the MJO is strong and parts of the oscillation that are favorable for more thunderstorms is over a part of the planet where it is also favorable for cyclones to form, it can increase the chances a storm will form and when the part of the oscillation that suppresses thunderstorms is there, it can reduce the chances you'll see cyclones forming. Right now, the enhanced thunderstorm part of the oscillation is moving from the Western/Central Pacific toward the Western Caribbean and on to Africa.
The CAG is the Central American Gyre and is a temporary feature of a huge mass of slowly spinning air that sets up over... Central America. On the Eastern edge of the gyre, over the Gulf and Western Caribbean near... Central America, disturbances can form and will tend to move along the edge of the gyre toward the northern Gulf. The formation of this gyre is correlated to movement of the MJO toward the West coast of the Americas, which is what that "moving from 8-1-2" thing refers to. It doesn't form every time the oscillation approaches and the oscillation isn't there every time the gyre forms, but when the gyre does form, it's well correlated to the approach of the MJO.
Am I learning, rds dc?
Last year, I asked what the hell this means. The MJO is the Madden Julian Oscillation, which is a very large scale feature that sets up an area of better than average thunderstorm formation and an area of thunderstorm suppression roughly opposite each other on the planet. So, the rainy part of it would be over the Atlantic while the non-rainy part might be over the Pacific. It circles the Northern tropics in an Eastward direction about every month or two and it varies in strength up and down over time. When the MJO is strong and parts of the oscillation that are favorable for more thunderstorms is over a part of the planet where it is also favorable for cyclones to form, it can increase the chances a storm will form and when the part of the oscillation that suppresses thunderstorms is there, it can reduce the chances you'll see cyclones forming. Right now, the enhanced thunderstorm part of the oscillation is moving from the Western/Central Pacific toward the Western Caribbean and on to Africa.
The CAG is the Central American Gyre and is a temporary feature of a huge mass of slowly spinning air that sets up over... Central America. On the Eastern edge of the gyre, over the Gulf and Western Caribbean near... Central America, disturbances can form and will tend to move along the edge of the gyre toward the northern Gulf. The formation of this gyre is correlated to movement of the MJO toward the West coast of the Americas, which is what that "moving from 8-1-2" thing refers to. It doesn't form every time the oscillation approaches and the oscillation isn't there every time the gyre forms, but when the gyre does form, it's well correlated to the approach of the MJO.
Am I learning, rds dc?
This post was edited on 5/11/19 at 2:45 pm
Posted on 5/11/19 at 1:43 pm to soccerfüt
I was going to buy a sack of crawfish next weekend but I’m sure they will be too high by next week.
Posted on 5/11/19 at 1:49 pm to TigerstuckinMS
quote:
Am I learning
Yes.
Posted on 5/11/19 at 1:50 pm to TigerstuckinMS
Thanks for explaining because I didn’t have a clue what all that meant
Posted on 5/11/19 at 1:55 pm to Miketheseventh
quote:
Thanks for explaining because I didn’t have a clue what all that meant
I've learned that these weather guys are REALLY into the jargon of the field because they all know what "Movement of the MJO through Phases 8,1,2" means, but explaining it takes paragraphs, so they use the jargon and the applicable charts and graphs in these threads to quickly get the information out to avoid writing novels. If you ask and aren't one of the "you don't know what you're talking about because a tornado didn't hit my house" assholes that come here trying to troll them, they're willing to explain it to you as best they can.
For instance, this chart
that rds posted when talking about moving from 8,1,2 is fairly simple. It is a quick way to show both where the rainy part of that MJO is and how strong it is. The farther the dots are from the center of the chart, the stronger the oscillation is. When the dots are in the circle, the oscillation is weak. When they start getting outside the circle, it's getting stronger and can influence weather more. The chart is divided into 8 "phases" that basically just correlate to the part of the planet the peak of the oscillation is over. You can read those rough locations around the outside of the chart. The bigger dot is the day the chart was made, and is marked with a 10 because the date of the chart is 5/10. You can see the earlier dates and see how it moved around the planet in the past. The green line and dots ahead of today show the official forecast based on the GEFS model ensemble's (which is noted in the top right corner of the chart) predictions of where it will be in the future. The spaghetti lines are very similar to a hurricane chart's spaghetti lines and represent what each individual model run of the ensemble is predicting.
The chart is showing that on 5/10, the peak was over the Western Pacific (phase 7, as seen on the edge of the graph) and is expected to move into the Western hemisphere and head to Africa (phases 8 & 1) over the next few weeks. As it moves over the next few weeks, it's expected to weaken some for a week or so, then begin strengthening again. Past the end of this chart, it will continue Eastward back into the Indian Ocean (phase 2). 8-1-2.
I think. It's taken me a couple of hurricane seasons to start picking up on some of the stuff that these guys are laying down, so there are definitely a lot of things that I'm still not understanding correctly or fully.
This post was edited on 5/11/19 at 2:48 pm
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