ATL HANNA: Extratropical - Discussion

[tolakram]

[weatherbud]

Tropical Storm Hanna Rain & Wind Impact this Weekend

source

[UpTheCreek]

I'm sorry, but that is just a bizarre chart.

[Bane]

:uarrow:

I'm sorry, but that is just a bizarre chart.

yes, it is. wilmington could experience a cat 1 or 2 hurricane and get less than an inch of rain while raleigh gets over 4?

[Hurricanewatcher2007]

We don't normally get tropical systems up here in Maine so I have no clue how to read the wind speed probabilities chart. What does this mean:

PORTLAND ME 34 X X( X) X( X) X( X) 11(11) 2(13) X(13)
PORTLAND ME 50 X X( X) X( X) X( X) 3( 3) X( 3) X( 3)

[cpdaman]

where did the ULL low go that was next to hanna

i mean judging by her distorted appearance and the monster area she encompasses (size wise) she may havet tried to eat it

and she appears to be having some indigestion

miami long range radar shows hanna's bands to the SE over the bahamas

visible shows the convection along the west side of her center (being sheared pretty strongly to the north) so i would suppose this is due to the ull being in some fashion to her sw

[HurricaneRobert]

:uarrow:

I'm sorry, but that is just a bizarre chart.

yes, it is. wilmington could experience a cat 1 or 2 hurricane and get less than an inch of rain while raleigh gets over 4?

Hanna is the first naked hurricane.

[fig]

We don't normally get tropical systems up here in Maine so I have no clue how to read the wind speed probabilities chart. What does this mean:

PORTLAND ME 34 X X( X) X( X) X( X) 11(11) 2(13) X(13)
PORTLAND ME 50 X X( X) X( X) X( X) 3( 3) X( 3) X( 3)

Look at what columns those numbers are in and it will tell you the day and time...for instance if the 11(11) is in the 00Z Sun to 00Z Mon column, it means you've got an 11 percent chance of 34 knot winds between 8pm saturday and 8pm sunday. It's confusing at first, but you'll get the hang of it..I wouldn't worry too much about winds as the system will be moving fast by the time it gets up there

At least your wind probs chart doesn't look like mine lol

WILMINGTON NC 34 X 1( 1) 31(32) 34(66) 2(68) X(68) X(68)
WILMINGTON NC 50 X X( X) 4( 4) 25(29) 2(31) X(31) X(31)
WILMINGTON NC 64 X X( X) 1( 1) 8( 9) 1(10) X(10) X(10)


Hope this helped!

[CrazyC83]

where did the ULL low go that was next to hanna

i mean judging by her distorted appearance and the monster area she encompasses (size wise) she may havet tried to eat it

and she appears to be having some indigestion

miami long range radar shows hanna's bands to the SE over the bahamas

visible shows the convection along the west side of her center (being sheared pretty strongly to the north) so i would suppose this is due to the ull being in some fashion to her sw

Yeah I agree, Hanna is probably just eating everything around her, including the dry air.

Could that result in a smaller windfield down the line?

[wxman57]

Racing away then wxman57, 16kts at least should mean Hanna gets out of the way reasonably quickly.

A 2 hr movement is too short to make long term projections. I'd prefer a 6-12 hr movement. We've seen storms speed up significantly over such short periods before, only to slow to a crawl a few hours later (Fay/Gustav).

I have a 4hr movement now - toward 307 degrees at 15 kts.

[cpdaman]

i guess it's tuff to plot anything on hanna when her LLC is stretched from 74.6 to 73.2 on visible, in fact i can't even locate it ( not looking at hi-res visible now) there appears to be a swirl near 24.5 / 74.2 but this may just be an eddy

i do see lots of dry air getting entrained on the se side of her LLC though

wxman if you are looking at high res , where do you locate her "exact" center

[wxman57]

i guess it's tuff to plot anything on hanna when her LLC is stretched from 74.6 to 73.2 on visible, in fact i can't even locate it ( not looking at hi-res visible now) there appears to be a swirl near 24.5 / 74.2 but this may just be an eddy

i do see lots of dry air getting entrained on the se side of her LLC though

wxman if you are looking at high res , where do you locate her "exact" center

Ha, exact center. I see 2-3 little vortices rotating around that big open area now. The small swirl identified earlier is gone. Center of the big open area is 25N/74W.

[jhpigott]

anyone think the western edge of Hanna's rain field is going to make it to the east coast of florida

http://radar.weather.gov/ridge/radar.ph ... 1&loop=yes

[cpdaman]

anyone think the western edge of Hanna's rain field is going to make it to the east coast of florida

http://radar.weather.gov/ridge/radar.ph ... 1&loop=yes

probably not in my opinion , but there should be scattered showers later today and tonite

[jabber]

A little flare up is taking place in the more mosture rich NW part of the swirl. If you look at the water vapor loop you can see where Hanna is really sucking in the dry air from the south. I do have a feeling that if the dry air runs our or gets cut off she may get more convection starting around the center. But I would not put a bet on it at this point.

http://www.ssd.noaa.gov/goes/flt/t2/loop-wv.html

[tpr1967]

The center appears to be on the west side of that open area.

[cpdaman]

jabber i think that is why she definitely needs to be watched (esp in ga/sc/nc)

but that sure is alot of dry air

i wonder if the ULL moving more west will just drag a sheared weak hanna closer to central florida

giving a bit of rain and higher surf

[masaji79]

Hanna almost has the appearance of STS Andrea last year.

[tolakram]

[jabber]

jabber i think that is why she definitely needs to be watched (esp in ga/sc/nc)

but that sure is alot of dry air

i wonder if the ULL moving more west will just drag a sheared weak hanna closer to central florida

giving a bit of rain and higher surf

Yeah I am watching although from the pace of this forum I may be the only one. It appears from the last couple WV loops that the dry air intrusion might just get pinched off soon. Lets see what happens if that occurs.