ATL: IRMA - Post-Tropical - Discussion

[WeatherLovingDoc]

What's an interesting coincidence is that Hurricane Luis in '95 hit us in Antigua on September 5th as well.

We're all rooting for you in Antiqua, fd122. Please let us know how it goes for you and others when you can.

[SunnyThoughts]

Omg!

 https://twitter.com/RyanMaue/status/905144773643816960

That tweet gives me complete discomfort, quite like how I felt with Patricia. I'm praying for those in the path of this monster.

Along with everyone in the pat I'm worried about, also starting to worry about hurricane hunters flying into such a monster. I know they flew into Rita etc.. bit seems sooo dangerous. May the Lord watch over them as they try to determine how strong she is so that people on the ground can prepare.

[Langinbang187]

When will Recon be in there for another sample of the winds? I'm pretty curious to see if this can tie or even surpass Allen. Would be a shame if an EWRC started and we missed it's peak winds.

[Praxus]

I'm very concerned about the Caribbean islands in the path like Anguilla and BVI. 185 mph winds and an 11 foot storm surge with large waves on top of that is apocalyptic. I imagine many shelters in the area would NOT be safe under those conditions.

[tolakram]

Stay on topic please, I think we've talked about tornadoes enough here. Thanks.

[Extratropical94]

When will Recon be in there for another sample of the winds? I'm pretty curious to see if this can tie or even surpass Allen. Would be a shame if an EWRC started and we missed it's peak winds.

There will be two active missions going into this evening.The first plane is scheduled to depart in 40 minutes and should reach the center 2 hours from now.

[southwest southerner]

I'm concerned Irma seems to keep hugging that 17 latitude line. Can someone tell me how this compares to forecast points? Really hoping she'll pull north so as to miss Barbuda & Anguilla which right now look to be in line for direct hits.

Can you post the link to that "closest to ____" app?

[Orlando]

Ft. Myers live streaming news:

http://www.winknews.com/live/ (They start live news at 4 PM eastern time)

Also here is NBC link:

http://www.nbc-2.com/

[nativefloridian]

I'm concerned Irma seems to keep hugging that 17 latitude line. Can someone tell me how this compares to forecast points? Really hoping she'll pull north so as to miss Barbuda & Anguilla which right now look to be in line for direct hits.

She seems to be on target with NHC's forecast points.

[AutoPenalti]

Broward County Public schools are closed on Thursday and Friday. No word on colleges yet but I'm pretty confident they will follow suit.

[KBBOCA]

Can you post the link to that "closest to ____" app?

It's one of the tools at Storm Carib.

http://stormcarib.com/closest1.htm

You can either select your Island from the list, or enter your own latitude / longitude (e.g. if you're in South Florida). You can look up your latitude / longitude at
http://www.latlong.net/

[meriland29]

Does anyone have a map or a link to the recon flights? Also, have they recently flown into it after the 2pm advisory?

[southwest southerner]

Can you post the link to that "closest to ____" app?

It's one of the tools at Storm Carib.

http://stormcarib.com/closest1.htm

You can either select your Island from the list, or enter your own latitude / longitude (e.g. if you're in South Florida). You can look up your latitude / longitude at
http://www.latlong.net/

Thank you very much.

[Tekken_Guy]

Just how on earth is that pressure so high?

[Langinbang187]

Just how on earth is that pressure so high?

It's in the central Atlantic so it's not surprising the pressure is high relative to the winds.

[meriland29]

Omg!

 https://twitter.com/RyanMaue/status/905144773643816960

That tweet gives me complete discomfort, quite like how I felt with Patricia. I'm praying for those in the path of this monster.

Along with everyone in the pat I'm worried about, also starting to worry about hurricane hunters flying into such a monster. I know they flew into Rita etc.. bit seems sooo dangerous. May the Lord watch over them as they try to determine how strong she is so that people on the ground can prepare.

I agree 100%. There has to be a point at which it is no longer safe for Reconnaissance to fly into the strongest part. Seeing the GoPro-like footage of one of the more recent flights, it definitely seems unstable for them.

[Hurrilurker]

https://i.imgur.com/VvsYXWl.png

Can someone please explain what this chart is and how to read it? I haven't seen them posted here much until this year. I guess it's some kind of pressure vs. dew point and temperature graph for a dropsonde and it means the core is stronger if the lines are straight up-down and closer together? But I don't understand it. And why are the vertical graph lines diagonal? Thanks in advance.

It indeed is a temperature/dew point vs pressure (T-p) graph for a dropsonde with wind barbs added at the side. The dots resemble the heights where temperature measurements were made. To derive the temperature and dewpoint at a certain height, just go from a point on the red or green graph to the bottom scale by moving parallel to the dashed slanted lines.

When the green line (dew point) and the red line (temperature) are close together, that simply means that the air is saturated with water vapor and the relative humidity is near 100%. This is common within clouds, fog or areas where humid air is rising and the water is about to condensate, like for example in the eyewall of a hurricane. In the eye the air is typically sinking which forces adiabatic heating and the humidity decreases a little. That's why you see the green and red lines separated from each other in a center dropsonde diagram.

I think here the diagrams are mainly used to visualize the wind speeds at different heights (which are also shown in the table on the right, together with all the 'decoded' temp and dew point data). Evaluating the strength of the core is easier with other tools, as these graphs do only show absolute temperatures, not the temperature differences between the core and the ambient air at the same level.

T-p diagrams do often have slanted vertical lines for temperature (those diagrams are called "skew-T"-diagrams). Two reasons for that. First, you can set the inclination of the isotherms (dashed lines of constant temperature) to a specific value to make a certain vertical temp profile appear as a straight vertical line. By doing that you can for example make assumptions about the stability of the atmosphere by just looking of the inclination of the T-line. Second, you need less space. There is no need for a +30°C line at 50000 feet or a -90°C line at the surface. Basically it avoids temperature curves that get too far out to the sides.

Great explanation, thank you!

[cycloneye]

Thread made for the members to post local observations,Web Cams,local statementa from NWS from the areas that will be in the path of Irma.

[Exalt]

They need to HURRY with these mandatory evac orders in Miami Dade. My Aunt is persistent on staying because they haven't issued one yet. The potential for catastrophic damage is too high, they need to get people OUT.

[La Sirena]

They need to HURRY with these mandatory evac orders in Miami Dade. My Aunt is persistent on staying because they haven't issued one yet. The potential for catastrophic damage is too high, they need to get people OUT.

Didn't the mayor offer up in his press conference that they're preparing to issue them? I only heard part of the presser....but, maybe you can show it to her online. Good luck and stay safe.