rst3

Isaias

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12 hours ago, Plug and teaser said:

rst3 , do you have an accurate map of the actual storm path as it passed us.

Mostly interested in the wind directions as they changed during the storm

Yes. Track shows the storm center

20200805_183033.jpg.8d027a6c6cafa56a3da508ed4eb8b86a.jpg

 

As far as wind shift..

Isaias wasn't a "pure" tropical system by the time it got to New England. It was a hybrid -- transitioning to an extratropical cyclone. 

 

So instead of a symmetrical wind field like a pure warm-core system (hurricane/tropical storm)......

Ex) 1938 Hurricane

1938_hurricane_wind_002.jpg.bf44d2247bf49cdeb4c8edb0ff72a108.jpg

 

...Isaias had a squall line feature typical of baroclinic systems (eg: noreasters/regular low pressure storms).

Screenshot_20200805-194301_Gallery.jpg.b73f7622718e5387e41ce998d5327e86.jpg

 

A dry slot blasted in behind the much more humid squall line. 

Screenshot_20200804-062047_Twitter.jpg.b97d1c1b5782e404cf47e4d4b46fc6e7.jpg

 

So in eastern Massachusetts.. the wind shift "roughly" went from south -- before and during the squall line.. to SW, right after the line went through.

 

For exact wind measurements though, we can use data from weather stations like marine buoys. Here's the Buzzards Bay buoy. Sustained wind peaked at 40kts, and the direction shifted from *appx 130° (SE) to ~195° (SSW), before slowly becoming more SW

5f2b454c35572_plot_met(28).png.73dfaa33c0cb228b629c6449f1cd68c8.png

Screenshot_20200805-183703_Chrome.jpg.1a1c941f14484bd96465f3d8b341e5f4.jpg

 

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1 hour ago, rst3 said:

Yes. Track shows the storm center

20200805_183033.jpg.8d027a6c6cafa56a3da508ed4eb8b86a.jpg

 

As far as wind shift..

Isaias wasn't a "pure" tropical system by the time it got to New England. It was a hybrid -- transitioning to an extratropical cyclone. 

 

So instead of a symmetrical wind field like a pure warm-core system (hurricane/tropical storm)......

Ex) 1938 Hurricane

1938_hurricane_wind_002.jpg.bf44d2247bf49cdeb4c8edb0ff72a108.jpg

 

...Isaias had a squall line feature typical of baroclinic systems (eg: noreasters/regular low pressure storms).

Screenshot_20200805-194301_Gallery.jpg.b73f7622718e5387e41ce998d5327e86.jpg

 

A dry slot blasted in behind the much more humid squall line. 

Screenshot_20200804-062047_Twitter.jpg.b97d1c1b5782e404cf47e4d4b46fc6e7.jpg

 

So in eastern Massachusetts.. the wind shift "roughly" went from south -- before and during the squall line.. to SW, right after the line went through.

 

For exact wind measurements though, we can use data from weather stations like marine buoys. Here's the Buzzards Bay buoy. Sustained wind peaked at 40kts, and the direction shifted from *appx 130° (SE) to ~195° (SSW), before slowly becoming more SW

5f2b454c35572_plot_met(28).png.73dfaa33c0cb228b629c6449f1cd68c8.png

Screenshot_20200805-183703_Chrome.jpg.1a1c941f14484bd96465f3d8b341e5f4.jpg

 

Thank you, just what I was looking for.

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