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Tropical Hurricane Idalia

12z NAM east of 6z NAM. Was near Sumter on 6z now back to about 20 miles inland at 12
Ok…understood. It did pretty much follow the 6z Euro though and that brought some fairly heavy rainfall to the eastern SC Upstate and southeast NC Piedmont
 
NHC not buying what the NAM (and HRRR tbh) is selling just yet, seem pretty locked in on the track

093743_5day_cone_with_line_and_wind.png
 
The storm is going to come roaring into the NE Florida panhandle with a brisk forward speed of nearly 20mph. High winds will extend further inland than is usual for a landfalling GOM cane this time of year.
 
The storm is going to come roaring into the NE Florida panhandle with a brisk forward speed of nearly 20mph. High winds will extend further inland than is usual for a landfalling GOM cane this time of year.
Yeah that's not getting a bunch of attention but it will be moving quick at landfall, you are correct, could be a large area of power outages
 
This is way out there and it's the euro control but it loops Idalia out into the atlantic then backs it into the outer banks around hour 270. Cant say I've seen that before.
 
NHC not buying what the NAM (and HRRR tbh) is selling just yet, seem pretty locked in on the track

093743_5day_cone_with_line_and_wind.png
To be fair, NHC always waits a few model runs before adjusting. If there are like 3 runs of the GFS that shift west, they will finally start making adjustments and they don’t do knee jerk reactions to one run. They were really bad about this last year. But the track does have a very tight cluster at this moment, will be fun to watch
 
NHC not buying what the NAM (and HRRR tbh) is selling just yet, seem pretty locked in on the track

093743_5day_cone_with_line_and_wind.png
Their tracks are always to a Tee what the spaghetti plots show. Maybe a touch of variation but I never see them do anything but maintain the track based on whatever the latest run was. For example the track above is like identical to the most recent spaghetti run a couple of hours ago:
1693322226715.png
Right now those a further east vs what a lot of the global and mesoscale models are currently showing.
 
Genuine question: has the NAM ever been known for any degree of accurate forecasting for tropical systems? Happy to look at weenie maps but as far as I remember it always over amplifies intensity and is not exceptionally accurate for track either.
 
Genuine question: has the NAM ever been known for any degree of accurate forecasting for tropical systems? Happy to look at weenie maps but as far as I remember it always over amplifies intensity and is not exceptionally accurate for track either.
The track is usually within a general area of other guidance. It's the strength that it always WAYYYYY over exaggerates. But oddly enough the most recent update is right in lock step with the Hurricane models strength wise.
 
Genuine question: has the NAM ever been known for any degree of accurate forecasting for tropical systems? Happy to look at weenie maps but as far as I remember it always over amplifies intensity and is not exceptionally accurate for track either.
No. It has never, ever been considered a reliable tropical model. I tried to make that point last night, and it was met with sarcasm about only believing in the Euro...or some such nonsense. I still maintain that last night's run (and today's 12z 3K run) tracking it near Columbia and into the NC coastal plain is too far west/north. But we'll see.
 
Their tracks are always to a Tee what the spaghetti plots show. Maybe a touch of variation but I never see them do anything but maintain the track based on whatever the latest run was. For example the track above is like identical to the most recent spaghetti run a couple of hours ago:
View attachment 136612
Right now those a further east vs what a lot of the global and mesoscale models are currently showing.
That seems like a very dangerous recipe to only base it off spaghetti plots when most models are showing it west. Especially this close.
 
I'm surprised they didn't expand the cone west from everything we're seeing on the model runs. People only have today to evacuate.
Yeah but to be fair there are H warnings outside of the cone, so in theory those areas should still be preparing
 
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