Hurricane Category 4 Hurricane Helene

[Clancy]

Severe flooding at Madeira Beach.

 

[wx_guy]

941 mb and 140 mph at 9 pm

 

[TornadoFan]

941 mb and 140 mph at 9 pm

Oh.

 

[Clancy]

941 mb and 140 mph at 9 pm

10 MPH increase in just an hour, wow.

845
WTNT64 KNHC 270056
TCUAT4

Hurricane Helene Tropical Cyclone Update
NWS National Hurricane Center Miami FL AL092024
900 PM EDT Thu Sep 26 2024

...HELENE SLIGHTLY STRONGER AS ITS EYE APPROACHES THE COAST OF THE
FLORIDA BIG BEND...
...900 PM EDT POSITION UPDATE...

A University of Florida Coastal Monitoring Program tower located on
Cedar Key recently reported a sustained wind of 55 mph (89 km/h) and
a wind gust of 73 mph (117 km/h).

A NOAA National Ocean Service tide gauge located at Clearwater Beach
recently reported a water level of 5.07 feet above mean higher high
water, which is an approximation of inundation in that area.

SUMMARY OF 900 PM EDT...0100 UTC...INFORMATION
----------------------------------------------
LOCATION...29.1N 84.2W
ABOUT 65 MI...105 KM W OF CEDAR KEY FLORIDA
ABOUT 90 MI...145 KM S OF TALLAHASSEE FLORIDA
MAXIMUM SUSTAINED WINDS...140 MPH...225 KM/H
PRESENT MOVEMENT...NNE OR 20 DEGREES AT 24 MPH...39 KM/H
MINIMUM CENTRAL PRESSURE...941 MB...27.79 INCHES

$$
Forecaster Bucci/Sardi

 

[Evan]

Perhaps a bit of both.

Hopefully it doesn't reflect too closely to reality as I am now seeing a ton of 160-170mph bins.

 

[Brice W]

140 new advisory.

 

[MMWX]

While I don't think it's probable, Cat 5 is definitely possible.

 

[wx_guy]

The radar velocities scan into the atmosphere, so it's likely exaggerated from the surface winds, but within some reason, they're probably accurate. The eye wall is close now to TLH radar.

 

[UncleJuJu98]

Seems like we have about a max of two to three hours before landfall if we are going to see more intensifying over water

 

[TheSuckZone]

While I don't think it's probable, Cat 5 is definitely possible.

Probably not but it's got a little time to approach 150 at least

 

[Clancy]

Extreme Wind Warning for Big Bend area.

 

[wx_guy]

Dropsonde measured 108 knots in the NE eye wall and 948 mb. That extrapolates to a 937 mb at the surface. Still strengthening!

 

[notsoencrypted]

Extreme wind warning just went up for the eyewall's approach.

Extreme Wind Warning for...
Lafayette County in Big Bend Florida...
Northeastern Wakulla County in Big Bend Florida...
Northwestern Dixie County in Big Bend Florida...
Taylor County in Big Bend Florida...
Jefferson County in Big Bend Florida...
Eastern Leon County in Big Bend Florida...
Madison County in Big Bend Florida...

Until midnight EDT.

At 859 PM EDT, National Weather Service Doppler radar indicated
extreme winds, associated with the eyewall of Hurricane Helene,
were moving onshore 39 miles southeast of Carrabelle, moving north
at 35 mph. THIS IS AN EXTREMELY DANGEROUS AND LIFE-THREATENING
SITUATION!

 

[MMWX]

The radar velocities scan into the atmosphere, so it's likely exaggerated from the surface winds, but within some reason, they're probably accurate. The eye wall is close now to TLH radar.

Yup. Getting winds up to 165mph on RadarScope currently.

 

[notsoencrypted]

And it looks like just a little after the extreme wind warning went up, the webcam I was watching in Steinhatchee went down. Not surprised.

 

[bjdeming]

Seems like we have about a max of two to three hours before landfall if we are going to see more intensifying over water

A 1-MPH increase in forward speed might not be significant, but perhaps the ongoing interaction will accelerate Helene more over that short time?

 

[UncleJuJu98]

Velocities picking up some in the northeast side.

 

[MikeP]

So what, still about 90 miles south of Tallahassee?

 

[TornadoFan]

Alot of lightning in the northern part of the eyewall.

 

[Julian]

The eye wall is not open. See the thread further back, the radar can't penetrate the full eye, it's actually fully closed.

It was giving the same look from KTBW on the opposite side of the eyewall earlier. Agree to disagree not that it matters much