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What will be the maximum intensity of Tropical Storm Flossie?
15
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resolved Jul 3
100%65%
Category 3 hurricane
0.5%
Weak tropical storm (35 - 45 kt)
0.6%
Strong tropical storm (50 - 60 kt)
0.7%
Category 1 hurricane
11%
Category 2 hurricane
17%
Category 4 hurricane
5%
Category 5 hurricane

Resolves according to operational intensity. Closes early

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@SaviorofPlant this can be resolved. Final advisory was just issued:

https://www.nhc.noaa.gov/text/refresh/MIATCDEP1+shtml/032030.shtml

Peaked at cat. 3 (100kt):

https://ftp.nhc.noaa.gov/atcf/btk/bep062025.dat

Props to NHC forecasters -- their forecast of a cat. 3 went above all guidance for at least one of the advisories.

Upgraded in warning to cat 3

Hurricane Flossie Advisory Number  12
NWS National Hurricane Center Miami FL       EP062025
800 PM MST Tue Jul 01 2025
 
...MAJOR HURRICANE FLOSSIE BRINGING GUSTY WINDS AND RAIN TO THE 
SOUTHWESTERN COAST OF MEXICO...
 
 
SUMMARY OF 800 PM MST...0300 UTC...INFORMATION
----------------------------------------------
LOCATION...18.2N 107.4W
ABOUT 210 MI...340 KM WSW OF MANZANILLO MEXICO
ABOUT 365 MI...585 KM SSE OF CABO SAN LUCAS MEXICO
MAXIMUM SUSTAINED WINDS...115 MPH...185 KM/H
PRESENT MOVEMENT...WNW OR 300 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...962 MB...28.41 INCHES
 


Edit: ~~~~

Edit:

more meso for another day but it looks cooked (either ERC failed or just broke down?) ....

Last NHC discussion remarks it has peaked....

Satellite imagery shows that the inner core of Flossie has started 
to degrade this morning, and the eye has become more ragged and 
cloud filled. An AMSR2 microwave pass around 0916 UTC shows that 
the northern eyewall has started to deteriorate, and is open on the 
northern side. This suggest a weakening trend has begun, and Flossie 
has likely reached peak intensity. While the system has peaked, deep 
cold convection continues to wrap around the southern and eastern 
side of the system.

Expected to dissipate within 4 days.

bought Ṁ50 YES

appear to be mesovortices on the triangular eye.

2025JUL01 184020 5.2 963.1 94.8 5.2 5.7 6.0 0.5T/hour OFF OFF OFF OFF -41.11 -70.63 EYE -99 IR 14.3 17.54 106.39 ARCHER GOES19 41.0

2025JUL01 191020 5.3 961.1 97.2 5.3 5.6 6.0 0.5T/hour OFF OFF OFF OFF -27.46 -68.82 EYE -99 IR 14.3 17.71 106.47 ARCHER GOES19 41.2

Edit:

Last few raw dataT in cat 4 range again. Last subjective Dvorak from 18Z were 5.0 (90kt). The best track has 18Z at 95 kt…. It still appears to be strengthening ..

@parhizj dang. Didn’t see that coming.

@MachiNi will see…. Could have peaked already, it’s very marginal OHC

Oh didn't see the best track update...

https://ftp.nhc.noaa.gov/atcf/btk/bep062025.dat

It's now at 100 kt:

EP, 06, 2025070200,   , BEST,   0, 179N, 1071W, 100,  962, HU,  34, NEQ,   80,   60,   50,   70, 1009,  130,  15,   0,   0,   E,   0,    ,   0,   0,    FLOSSIE, D,  0,    ,    0,    0,    0,    0, genesis-num, 007, 
EP, 06, 2025070200,   , BEST,   0, 179N, 1071W, 100,  962, HU,  50, NEQ,   40,   40,   30,   30, 1009,  130,  15,   0,   0,   E,   0,    ,   0,   0,    FLOSSIE, D,  0,    ,    0,    0,    0,    0, genesis-num, 007, 
EP, 06, 2025070200,   , BEST,   0, 179N, 1071W, 100,  962, HU,  64, NEQ,   20,   15,   15,   15, 1009,  130,  15,   0,   0,   E,   0,    ,   0,   0,    FLOSSIE, D,  0,    ,    0,    0,    0,    0, genesis-num, 007, 

Edit:

On IR eye has popped up 3 times briefly in <24 hours..

Yin and Yang...

last light..

tcvitals has also been updated:

NHC  06E FLOSSIE   20250702 0000 179N 1071W 300 046 0962 1009 0241 51 028 0148 0111 0093 0130 D 0074 0074 0056 0056 72 229N 1146W 0037 0028 0028 0028 

curious to see what they set the warning intensity at… not a lot of support for 100kt still other than raw appearance and cimss adt (with lower raw data t values now…)

Seems to be apparent more Mesoscale vortices in triangular eye wall on shortwave

crazy that I’m getting (likely accurate) weather from a betting market

bought Ṁ10 YES

@blank You spoke too soon! 😭

The eye finally popped out after all this time..

https://www.nhc.noaa.gov/text/refresh/MIATCDEP1+shtml/010259.shtml

Raised to a hurricane due to that SSMIS F18 microwave pass influencing the ADT data and satellite appearance

If this is an eye it’s an extremely jagged one. Not clear how organized the core is…

NHC forecast discussion seems to rely on ships RI for their intensity guidance upgrade, but it seems to me there is still some uncertainty about its intensity that was fed into the 01/00Z models (was it too low or about right?). With the new OFCL estimate and ADT estimates the models are sure to be higher for the run after next … but how much higher?

Expecting it will be a hurricane before the day is over and that the strength has been underestimated a bit.

Edit:

Relevant discussion:

A SSMIS microwave pass from 1117 UTC this morning depicts the system 
continues to become better organized, with curved banding and 
potentially an inner core trying to develop. Latest Dvorak satellite 
intensity estimates from TAFB and SAB have increased this advisory 
to T/3.0. UW-CIMMS objective estimates range from 45 to 53 kt. Given 
the improving structure and recent satellite trends, the initial 
intensity is set to 50 kt for this advisory.

Environmental conditions are favorable for steady to rapid 
intensification, with low vertical wind shear, plentiful moisture, 
and warm SSTs. The latest NHC forecast explicitly forecasts rapid 
intensification over the next 24 hours, and it is noted that some 
SHIPS guidance shows a 50-65 percent chance of a 55kt increase in 
the next 48 h. The NHC peak intensity forecast remains on the higher 
end of the intensity guidance near the HCCA corrected consensus. In 
about 48-60 hours, environmental conditions become increasingly less 
favorable along the forecast track, with drier air and cooler sea 
surface temperatures, which should induce a steady weakening trend. 
By day 4, Flossie is forecast to become a post-tropical cyclone as 
the system will struggle to produce convection within the harsh 
environment.  

They've set the intensity to 50kt... I still think this is an under estimate...

DPRINT shows it is near hurricane strength...

 2025JUN30  1340   15.36   -102.37  996    67          61                 74         
 2025JUN30  1410   15.40   -102.43  994    63          57                 69     

And latest gradient wind analysis from CIRA suggests the inner core is already present:

Edit2: SAR winds from 12Z show it near hurricane strength

Edit4

01/ 00Z has passed and it still hasn’t cleared out an eye although it has good banding (NHC has kept its intensity steady); its track has followed a “valley” of lower OHC — I wonder if this led to very uneven convection on either side, and disrupted its structure enough after 30/12Z to prevent the RI from occurring.

Edit5

Late 00Z HAFS models have peak intensity as a low-mid cat.1