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Hurricane Irene and the mid-Atlantic (Pre-game show)


Ian

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Weird because some of the CWG twitter feeds are calling for much higher totals in the metro area. Didn't they call for a "Couple" of inches, which to me is 3ish, not .5 ish.

The forecast makes sense and is scaled right. I don't personally know where the gradient will set up nor did I know of the forecast till seeing it. I might have gone higher myself (though would rather not give totals at this range personally!)... tho if 18z is any indication maybe it was wise to be conservative. I do generally agree that the idea of Floyd is a good one--last night I was not arguing it wasn't just that the models were not showing a Floyd. I think it's arguable they still aren't though if it comes into NC the northeast will not get destroyed by wind and surge, that's pretty sure. Shifts of 20 miles are quite important.

http://upload.wikimedia.org/wikipedia/commons/4/43/Floyd1999_accumulations_bilingual.gif

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I would think that with Irene now making her more northerly turn (compared to the prior WNW), the current cold front clearing our area, and all of the players now on the field, the upcoming 00Z model runs may start the final track trend. Will it be east or west?

MDstorm

Did the cold front actually clear? I figured it just kind of died out as it bumped into the influence of Irene.

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It will be the entire bay and worst on the western shore given the forecast track. Winds are going to howl from the SE - NE during the peak. It's going to stack up a lot of water on the western side.

Isabel had sustained 50-55kt winds. If the current forecast track is right, the bay can easily have hurricane force winds this time. Insurance companies are in for a massive bill.

I'm not sure the Bay ever gets SE winds. They should be E, shifting to NE, then N, and finally NW. Given that, it strikes me that places like Norfolk would seem poised to see the greatest surge in light of the prolonged N fetch. I wouldn't think the western shore would see anything like Isabel. Nor would I expect there to be much surge in the northern reaches of the bay. It's the storms that go just west of they bay that can really pile the surge up in the bay and its tributaries

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Did the cold front actually clear? I figured it just kind of died out as it bumped into the influence of Irene.

The front is still to the north. It should wash out over the area tho MOS gives us like 6-12 hrs of north wind.

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This hurricane reminds me of last winter............more of the same crap with being on the western fringe.

The winter analogs are silly as there is not much comparison. This is pretty typical (on the high side of potential) for a tropical system off the East Coast.

I'd watch to see what if anything remains of the front as it washes out. Whatever is left of it seems to want to be the place where the transitional frontal zone to the northwest of the low wants to get going. I would argue on something like the NAM that the shield should actually come back further northwest initially (more like the euro) given the 700mb look than it does.

I could see higher totals in the larger area than Floyd if the slow movement is real. We'll see if that continues I guess, but for now...

Want to say D.C. will be able to pile up a solid amount but in 3 hours I could look foolish I suppose.

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Yeah because Ian blew the server up.

i dunno much right now.. i guess the "east shift" should be a blow but it seems within the realm of expected wobbles in guidance. euro has 4"+ almost to the blue ridge and has last 3 runs... last night was wetter further west. if i had to guess, 0z gfs will allay some fears.

looking at this thing.. it's going to have no trouble wanting to transition if/once it feels some land. the western half of it already looks primed based on the microwave imagery. if it hits nc more than a brush i think we might be fine for decent to big rain back to dc at least.

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i dunno much right now.. i guess the "east shift" should be a blow but it seems within the realm of expected wobbles in guidance. euro has 4"+ almost to the blue ridge and has last 3 runs... last night was wetter further west. if i had to guess, 0z gfs will allay some fears.

looking at this thing.. it's going to have no trouble wanting to transition if/once it feels some land. the western half of it already looks primed based on the microwave imagery. if it hits nc more than a brush i think we might be fine for decent to big rain back to dc at least.

Ian, along those lines, if it were to stay over NC for a time and weaken, would that allow the precip shield to spread out and help lessen that sharp cutoff to the west?

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