Was Hurricane Emily a Category 5?

[Derek Ortt]

if the wind gradient is spread out enough, and there is more stratiform than usual, the 112KT may be valid.

Often, when undergoing an EWRC, the pressure to wind relation is way out of whack

[MGC]

And that is why Katrina had such a low pressure but only Cat-3 winds....MGC

[HurricaneBill]

The pressure/wind ratio can also be out of whack if the hurricane is a midget cyclone.

Examples:

Charley: 941mb 150 mph
Andrew: 922mb 165 mph
Iris: 948mb 145 mph

Also, occasionally, a hurricane with an unusually high pressure will form.

Examples:

Bob (1985): 1002mb 75 mph
Danny (2003): 1000mb 75 mph

[Astro_man92]

how one can make a statement like that about H-Wind when one does not know what goes into H-Wind troubles me somewhat

remember, there is not a direct relation between pressure and wind speed

So a hurricane with 899 mb(4th or 5th most powerful pressure recorded) can be a Cat 3?

I'd say it could be if the system suddenly deppened greatly. From what I know it takes time for the winds to catch up with the pressure when it changes suddenly.

[NC George]

So a hurricane with 899 mb(4th or 5th most powerful pressure recorded) can be a Cat 3?

What is important in determining windspeed is not absolute pressure, but pressure relative to surrounding air mass.

[Jim Cantore]

So a hurricane with 899 mb(4th or 5th most powerful pressure recorded) can be a Cat 3?

What is important in determining windspeed is not absolute pressure, but pressure relative to surrounding air mass.

I'd be shocked to see it but its possible

a hurricane at 920mb was a 3 and 920 is cat 5 pressure

[Scorpion]

So a hurricane with 899 mb(4th or 5th most powerful pressure recorded) can be a Cat 3?

What is important in determining windspeed is not absolute pressure, but pressure relative to surrounding air mass.

I'd be shocked to see it but its possible

a hurricane at 920mb was a 3 and 920 is cat 5 pressure

Nah, I wouldn't really say 920 is a Cat 5 pressure anymore. But 899, thats extreme. Cat 4 maybe, but 3? Its odd.

[brunota2003]

these were taken from Katrina, now all of them dont follow the pressure guidlines...lol:

15 GMT 08/29/05 30.2N 89.6W 125 927 Category 3 Hurricane
21 GMT 08/29/05 31.9N 89.6W 75 960 Category 1 Hurricane
03 GMT 08/30/05 33.5N 88.5W 60 973 Tropical Storm
09 GMT 08/30/05 34.7N 88.4W 50 981 Tropical Storm
15 GMT 08/30/05 36.3N 87.5W 35 985 Tropical Depression