ATL: ISAAC - Post-Tropical - Discussion

[SouthDadeFish]

Dropsonde measured 982 mb with 11 knot surface winds, so 981mb seems a good measure. This thing is really deepening now.

[CrazyC83]

Dropsonde measured 982 mb with 11 knot surface winds, so 981mb seems a good measure. This thing is really deepening now.

Indeed, 981mb probable pressure. Still no wind data to support a cane yet.

[rainstorm]

981-982 is awfully low for a tropical storm

[Sanibel]

Something weird is happening where it's trading-off dry air for pressure and equalizing.

[hcane27]

Just a thought ..... .....Isaac stregnthens significantly ... notices weakness ... moves north to northeast and into Florida east of Destin ..... ... just sayin' .... silly I know ... but it is about the only thing that the storm hasn't done ....


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[Shuriken]

I'm sticking with my large eye theory.

IIRC, Katrina spent a disconcertingly long time as a sputtering 105mph storm before suddenly exploding.

[rainstorm]

JB has a point when he wonders how a 1007 mb storm can have 65 mph winds and a 981 mb storm can have 65 mph winds. 26 mb's is a huge difference. under normal circumstances 981 can easily support 90 mph winds.

[wxman57]

Plane did find a 73-74kt FL wind southwest of the center, but SFMR reports were well below 65 kts. Wouldn't dispute an estimate of 70-75 mph wind at the surface southwest of the center now. If it's not a 'cane now, it should be soon.

[wxman57]

JB has a point when he wonders how a 1007 mb storm can have 65 mph winds and a 981 mb storm can have 65 mph winds. 26 mb's is a huge difference.

I know! I know! It's because the winds yesterday were a bit (way) overstated by the advisories. The NHC doesn't like to lower a storm's wind speed as it's near land. This means sometimes saying a storm has 65 mph wind when the actual winds are closer to 50. They never want to give the public any reason not to heed TS warnings. Their goal is to protect lives and I can't fault them for that.

[SouthDadeFish]

Do you see what eye see?

L. Eye Character: Open in the north
M. Eye Shape & Diameter: Circular with a diameter of 20 nautical miles (23 statute miles)

[PTPatrick]

My question is if it's strengthening and pressure dropping, why did cloud tops just start warming...

[CrazyC83]

JB has a point when he wonders how a 1007 mb storm can have 65 mph winds and a 981 mb storm can have 65 mph winds. 26 mb's is a huge difference. under normal circumstances 981 can easily support 90 mph winds.

Irene at one point had winds of that with a 962 mb pressure.

[cheezyWXguy]

My question is if it's strengthening and pressure dropping, why did cloud tops just start warming...

heh well you guys already heard my take on it...

[Jimsot]

JB has a point when he wonders how a 1007 mb storm can have 65 mph winds and a 981 mb storm can have 65 mph winds. 26 mb's is a huge difference.

I know! I know! It's because the winds yesterday were a bit (way) overstated by the advisories. The NHC doesn't like to lower a storm's wind speed as it's near land. This means sometimes saying a storm has 65 mph wind when the actual winds are closer to 50. They never want to give the public any reason not to heed TS warnings. Their goal is to protect lives and I can't fault them for that.

Well then let them just make it a Hurricane already, we have all waited long enough. Sarcasm

[GCANE]

Expanding on WV

http://www.atmos.washington.edu/~ovens/ ... nhanced+24

Looks like he is beginning to push the ULL to his SW away.

http://tropic.ssec.wisc.edu/real-time/w ... oom=&time=

[drezee]

Looks to be deepening quite fast now.

The pressure is still dropping at the buoy it passed directly over a couple of hours ago.

Lowest pressure recorded was 985.3 mb with winds around 35kt.

http://www.ndbc.noaa.gov/station_page.php?station=42003&unit=E&tz=STN

Pressure down to
2:19 pm 984.8 mb

with 56 mph sustained winds and gusts to 65 mph!!
2:19 pm 48.6 kts SSW ( 200 deg true )

[raynief]

I have a question myself and my family live in the Denham Springs/Watson area and I was curious what might we be looking at storm wise?? and should we evacuate? I feel evacuation is a little extreme, but then again we have never had a storm head straight for us like this either. Any help would be greatly appreciated

[CrazyC83]

Looks to be deepening quite fast now.

The pressure is still dropping at the buoy it passed directly over a couple of hours ago.

Lowest pressure recorded was 985.3 mb with winds around 35kt.

http://www.ndbc.noaa.gov/station_page.php?station=42003&unit=E&tz=STN

Pressure down to
2:19 pm 984.8 mb

with 56 mph sustained winds and gusts to 65 mph!!
2:19 pm 48.6 kts SSW ( 200 deg true )

That buoy data would suggest a surface pressure of 980mb.

[monicaei]

I have a question myself and my family live in the Denham Springs/Watson area and I was curious what might we be looking at storm wise?? and should we evacuate? I feel evacuation is a little extreme, but then again we have never had a storm head straight for us like this either. Any help would be greatly appreciated

Totally uneducated opinion, from right down the road... But we are treating it like Gustav. Be ready to be camping for a while! Good luck.

[MHurricanes]

Joe Bastardi Tweet:

"Isaac pressure down to 982. horseshoe Eye appearing"

pic.twitter.com/FRHOWfxf

https://twitter.com/BigJoeBastardi/stat ... 6806679552