cdcollura
EF5
Good day all,
I am open to any input or corrections on this...
I seen the chases done on Typhoon "Krasa" in Taiwan and seen the maximum winds "lighter" than what was expected by us "western" storm chasers.
I understand that the 1-minute (60 second) mean wind speed is used to measure tropical cyclone winds according to the US (NHC / NWS) where a 10 m height is preferred in a marine environment (open sea area, marine exposure - such as an onshore eyewall flow off the ocean).
What determines the "gust" speeds? Do they use the 10-second mean / peak gust?
I see many reports saying maximum sustained at 120 MPH with "gusts" to 145 - Is that 145 for 10s or what about 3s?
I am also under the impression that typhoons, measured by JTWC / Japan use the 10-second sustained wind and not the 60 second (1 minute) rule like we do?
Is this why Krasa had "130 MPH winds" and those in Taiwan only felt 100+ MPH? Were these 130 MPH for 10s and not 1 minute? Just curious.
Or maybe the little loop it did just off the island upwelled cooler water causing Krasa's convection to crap-out and it simply weakened?
In comparison, the new EF scale uses a 3-second gust rule, making good sense for tornadoes, with an overlay of damage observed.
In comparison, a hurricane like Andrew back in 1992 with 165-MPH sustained winds gusting to over 200 (10 s) ... In 3 seconds a cat-5 hurricane like that is like an EF-5 tornado 10-20 miles wide? LOL!!
I am open to any input or corrections on this...
I seen the chases done on Typhoon "Krasa" in Taiwan and seen the maximum winds "lighter" than what was expected by us "western" storm chasers.
I understand that the 1-minute (60 second) mean wind speed is used to measure tropical cyclone winds according to the US (NHC / NWS) where a 10 m height is preferred in a marine environment (open sea area, marine exposure - such as an onshore eyewall flow off the ocean).
What determines the "gust" speeds? Do they use the 10-second mean / peak gust?
I see many reports saying maximum sustained at 120 MPH with "gusts" to 145 - Is that 145 for 10s or what about 3s?
I am also under the impression that typhoons, measured by JTWC / Japan use the 10-second sustained wind and not the 60 second (1 minute) rule like we do?
Is this why Krasa had "130 MPH winds" and those in Taiwan only felt 100+ MPH? Were these 130 MPH for 10s and not 1 minute? Just curious.
Or maybe the little loop it did just off the island upwelled cooler water causing Krasa's convection to crap-out and it simply weakened?
In comparison, the new EF scale uses a 3-second gust rule, making good sense for tornadoes, with an overlay of damage observed.
In comparison, a hurricane like Andrew back in 1992 with 165-MPH sustained winds gusting to over 200 (10 s) ... In 3 seconds a cat-5 hurricane like that is like an EF-5 tornado 10-20 miles wide? LOL!!