Jump to content
Brasil Abaixo de Zero

Furacões no Atlântico Norte e Pacífico Leste e Central - 2020


Recommended Posts

11 minutos atrás, Felipe F disse:

Gonzalo é semelhante a Danny, 2015

Felipe F, aqui está uma resposta sua sobre Danny, nos topicos de 2015
 

Danny se fortaleceu para categoria 3, sendo o primeiro ciclone desde Irene em 2011, a se tornar um grande furacão em Agosto.

O ciclone já começou a mostrar sinais de enfraquecimento na última hora.

 

3TAjwgf.gif

 
  • Like 2
Link to comment
Share on other sites

Citar

Recent satellite wind data indicate that a broad low pressure area
has formed in association with the tropical wave over the central
Gulf of Mexico. However, the accompanying shower and thunderstorm
activity is currently poorly organized. Conditions appear conducive
for additional development, and a tropical depression is likely to
form during the next day or two as the system moves west-
northwestward at about 10 mph. Interests in the western Gulf of
Mexico should monitor the progress of this system, as watches or
warnings could be required for portions of the coasts of Texas and
Louisiana later today or tonight. An Air Force Reserve Hurricane
Hunter aircraft is scheduled to investigate the system this
afternoon.
* Formation chance through 48 hours...high...70 percent.
* Formation chance through 5 days...high...80 percent.

 

  • Thanks 1
Link to comment
Share on other sites

29 minutos atrás, Tavares disse:

O NAM sempre transformando o deslocamento do ar causado pelo bater de asas de uma borboleta em um buraco negro.

u7EI4W2.gif

Gosto do seu senso de humor. KKK

Mas dessa vez há de se concordar. As águas do Atlântico e do Golfo estão a 30°, não acho que o modelo tenha exagerado.

  • Like 1
Link to comment
Share on other sites

Douglas levemente se intensificou. 80 mph e 989 mbar.

NHC prevê que Douglas entre em rapida intenficação vire Grande Furacão até amanhã no fim da tarde. Deve atingir o Havaí dentro de 4 dias e desembarcar lá como um categoria 1.

“‘warning: não coloquei a atualização de Douglas por que optei colocar a discussão, previsão e cone do Furacão. Thanks”’

204739_5day_cone_no_line_and_wind.png.38c061b42221093533fbb3ae1e731b86.png

Hurricane Douglas Discussion Number  10
NWS National Hurricane Center Miami FL       EP082020
1100 AM HST Wed Jul 22 2020

Douglas's structure has continued to improve, with a more 
well-defined eye becoming apparent in visible and microwave 
satellite images.  Subjective Dvorak intensity estimates from TAFB 
and SAB range from T4.0/65 kt and T5.0/90 kt, while the latest 
UW-CIMSS ADT is 4.0.  Douglas's initial intensity is therefore 
raised to 70 kt as a blend of the satellite estimates. 

The hurricane has begun to gain some latitude, and the initial 
motion is just north of due west, or 275/14 kt.  The track forecast 
reasoning has not changed since earlier this morning, with a 
persistent mid-tropospheric ridge to Douglas's north expected to be 
the main driving force for the entire 5-day forecast period.  
Douglas is forecast to turn west-northwestward by this evening, and 
then maintain that heading with some increase in forward speed 
through day 4 as it approaches the Hawaiian Islands.  A bend back 
to the west is then expected at the end of the forecast period.  
The new NHC track forecast lies right along the forecast path from 
the previous advisory through 60 hours, although it has been 
shifted slightly north on days 3-5 based on an overall shift of the 
guidance envelope at those times.  Confidence in the track forecast 
at this stage is rather high.

Intensity-wise, low shear and sea surface temperature of 28-29C 
favor continued strengthening, potentially at a rapid rate for the 
next 24 hours.  SHIPS, HCCA, and the Florida State Superensemble 
all bring the intensity near or at major hurricane strength in 
24-36 hours, which qualifies as rapid intensification.  The NHC 
intensity forecast is in line with these models and lies near the 
upper bound of the guidance envelope given the favorable 
conditions.  Some weakening is expected to begin by 48 hours due to 
cooler waters, but since vertical shear is not expected to increase 
until around day 4, the weakening rate is likely to be gradual.  
This forecast increases the chance that Douglas could maintain 
hurricane intensity as it approaches the Hawaiian Islands, and all 
interests on the islands should monitor the forecasts as they 
evolve over the next few days.

Key Messages:

1.  Douglas is expected to move near or over portions of the
Hawaiian Islands this weekend, and there is an increasing chance
that strong winds and heavy rainfall could affect portions
of the state beginning on Sunday.  Interests on the Hawaiian
Islands should continue to monitor the progress of Douglas and the 
official forecasts as they evolve over the next few days.

FORECAST POSITIONS AND MAX WINDS

INIT  22/2100Z 12.1N 130.9W   70 KT  80 MPH
 12H  23/0600Z 12.7N 132.9W   85 KT 100 MPH
 24H  23/1800Z 13.8N 135.8W  100 KT 115 MPH
 36H  24/0600Z 15.1N 138.9W  100 KT 115 MPH
 48H  24/1800Z 16.4N 141.9W   90 KT 105 MPH
 60H  25/0600Z 17.6N 145.0W   80 KT  90 MPH
 72H  25/1800Z 18.7N 148.0W   75 KT  85 MPH
 96H  26/1800Z 20.0N 154.0W   65 KT  75 MPH...NEAR HAWAII
120H  27/1800Z 21.0N 160.0W   55 KT  65 MPH...NEAR HAWAII

 

 

  • Like 2
Link to comment
Share on other sites

2 horas atrás, Miguel Russe disse:

Errrrooooouuuuu...... Como dizia Faustão em algum programa seu....

Gonzalo continua com 50 mph. Furacão Gonzalo deve ser entre o meio dia e meia noite de amanhã.

Relembrando o que disse mais cedo: " Ciclone pequenos fortalecem muito rápido (tbm são destruídos de forma rápida por ar seco e cisalhamento).

Gonzalo tinha todas evidências mais cedo de uma parede do olho se estruturando e explosões de torres quentes/convectivas (tipico de ciclones em intensificação), porém nas últimas horas houve uma interação com SAL e isso levou ao enfraquecimento.

 

Imagem

 

Imagem

  • Like 4
Link to comment
Share on other sites

Urgente......

Douglas se intensifica rapidamente a categoria 2.......

Hurricane Douglas Discussion Number  11
NWS National Hurricane Center Miami FL       EP082020
500 PM HST Wed Jul 22 2020

Douglas's cloud pattern has improved quickly since the last 
advisory, with an eye becoming more distinct within an area of cold 
cloud tops and expanding outflow in all quadrants. The initial 
intensity has been increased to 85 kt. This is in agreement with 
the latest SATCON estimate and a blend of the latest ADT and SATCON 
estimates. 

The hurricane has another 24 hours or so over SSTs above 28C with 
very low vertical shear, and rapid intensification appears to be 
underway. Given the current satellite trends and the SHIPS RII 
showing a 50 percent chance of a 30-kt intensity increase in 24 h, 
the NHC forecast has been increased above the guidance in the short 
term, showing the system peaking at 110 kt in 24 h, although timing 
the peak intensity during rapid strengthening is quite difficult. By 
36 h, SSTs cool along the forecast track but the shear remains low, 
which should result in gradual weakening. Late in the period, an 
increase in shear and a drier airmass should result in continued 
gradual weakening. Douglas is expected to be at or near hurricane 
intensity as it approaches the Hawaiian Islands on Sunday, and all 
interests there should monitor forecasts as they evolve over the 
next few days.

The initial motion estimate is now toward the west-northwest or
285/15. Douglas should continue on a general west-northwestward
motion for the next 72 hours under the influence of an expansive
mid-level ridge extending across much of the central and eastern
North Pacific. The track will turn more toward the west late in the
period as Douglas moves near the Hawaiian Islands. The new NHC track
forecast is very close to the previous one and lies near the middle
of the guidance envelope close to the TVCE multi-model consensus.

Key Messages:

1.  Douglas is expected to move near or over portions of the
Hawaiian Islands this weekend, and there is an increasing chance
that strong winds and heavy rainfall could affect portions
of the state beginning on Sunday.  Interests on the Hawaiian
Islands should continue to monitor the progress of Douglas and the
official forecasts as they evolve over the next few days.


FORECAST POSITIONS AND MAX WINDS

INIT  23/0300Z 12.5N 132.6W   85 KT 100 MPH
 12H  23/1200Z 13.4N 134.7W  100 KT 115 MPH
 24H  24/0000Z 14.6N 137.7W  110 KT 125 MPH
 36H  24/1200Z 15.9N 140.8W  105 KT 120 MPH
 48H  25/0000Z 17.1N 143.9W   90 KT 105 MPH
 60H  25/1200Z 18.2N 146.9W   80 KT  90 MPH
 72H  26/0000Z 19.2N 149.9W   70 KT  80 MPH
 96H  27/0000Z 20.3N 155.5W   60 KT  70 MPH
120H  28/0000Z 21.0N 162.0W   50 KT  60 MPH
BULLETIN
Hurricane Douglas Advisory Number  11
NWS National Hurricane Center Miami FL       EP082020
500 PM HST Wed Jul 22 2020

...DOUGLAS STRENGTHENING RAPIDLY...
...FORECAST TO BECOME A MAJOR HURRICANE BY THURSDAY...


SUMMARY OF 500 PM HST...0300 UTC...INFORMATION
----------------------------------------------
LOCATION...12.5N 132.6W
ABOUT 1570 MI...2530 KM ESE OF HILO HAWAII
MAXIMUM SUSTAINED WINDS...100 MPH...155 KM/H
PRESENT MOVEMENT...WNW OR 285 DEGREES AT 17 MPH...28 KM/H
MINIMUM CENTRAL PRESSURE...982 MB...29.00 INCHES


WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.

Interests in the Hawaiian Islands should monitor the progress of
Douglas.


DISCUSSION AND OUTLOOK
----------------------
At 500 PM HST (0300 UTC), the eye of Hurricane Douglas was
located near latitude 12.5 North, longitude 132.6 West. Douglas is
moving toward the west-northwest near 17 mph (28 km/h) and this
general motion is expected to continue through Saturday.

Maximum sustained winds have increased to near 100 mph (155 km/h) 
with higher gusts.  Additional strengthening is forecast during the
next 24 hours, and Douglas is forecast to become a major hurricane
by Thursday. Gradual weakening is forecast to begin by early Friday.

Hurricane-force winds extend outward up to 15 miles (30 km) from the
center and tropical-storm-force winds extend outward up to 105 miles
(165 km).

The estimated minimum central pressure is 982 mb (29.00 inches).


HAZARDS AFFECTING LAND
----------------------
None.

Key messages for Douglas can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDEP3 and WMO header WTPZ43 KNHC.


NEXT ADVISORY
-------------
Next complete advisory at 1100 PM HST.
Link to comment
Share on other sites

TD Eight tbm se forma no ATL....

Deve fortalecer para TS Hanna..

.

BULLETIN
Tropical Depression Eight Advisory Number   1
NWS National Hurricane Center Miami FL       AL082020
1000 PM CDT Wed Jul 22 2020

...TROPICAL DEPRESSION FORMS IN THE GULF OF MEXICO...
...TROPICAL STORM WATCH ISSUED FOR MUCH OF THE TEXAS COAST...


SUMMARY OF 1000 PM CDT...0300 UTC...INFORMATION
-----------------------------------------------
LOCATION...25.9N 88.2W
ABOUT 530 MI...855 KM ESE OF PORT OCONNOR TEXAS
MAXIMUM SUSTAINED WINDS...30 MPH...45 KM/H
PRESENT MOVEMENT...WNW OR 285 DEGREES AT 6 MPH...9 KM/H
MINIMUM CENTRAL PRESSURE...1009 MB...29.80 INCHES


WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:

A Tropical Storm Watch has been issued for much of the Texas coast
from Port Mansfield to High Island.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Tropical Storm Watch is in effect for...
* Port Mansfield to High Island Texas

A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area, generally within 48 hours.

Interests elsewhere along the Texas and Louisiana coast should
monitor the progress of this system.

For storm information specific to your area, including possible
inland watches and warnings, please monitor products issued by your
local National Weather Service forecast office.


DISCUSSION AND OUTLOOK
----------------------
At 1000 PM CDT (0300 UTC), the center of Tropical Depression Eight
was located near latitude 25.9 North, longitude 88.2 West.  The
depression is moving toward the west-northwest near 6 mph, and this 
general motion is expected during the next few days.  On the 
forecast track, the center of the depression is expected to move 
across the northwestern Gulf of Mexico on Thursday and Friday and 
make landfall along the Texas coast on Saturday.

Maximum sustained winds are near 30 mph (45 km/h) with higher gusts.
Slow strengthening is expected, and the depression could become a 
tropical storm in a day or so.

The estimated minimum central pressure is 1009 mb (29.80 inches).


HAZARDS AFFECTING LAND
----------------------
WIND:  Tropical storm conditions are possible within the watch
area by late Friday.

RAINFALL:  The depression is expected to produce 2 to 4 inches of 
rain with isolated maximum totals of 6 inches along the Gulf coast 
from Louisiana to the Lower Texas coast, and inland through 
south-central Texas and the Rio Grande Valley.

SURF:  Swells generated by the depression are expected to increase
and affect much of the Texas and Louisiana coasts in a day or two.
These swells are likely to cause life-threatening surf and rip
current conditions.  Please consult products from your local
weather office.


NEXT ADVISORY
-------------
Next intermediate advisory at 100 AM CDT.
Next complete advisory at 400 AM CDT.

025343_5day_cone_no_line_and_wind.png.9a6eff393b2f8f1b26cfb93e4bf99beb.png

  • Like 3
Link to comment
Share on other sites

3 horas atrás, Felipe F disse:

porém nas últimas horas houve uma interação com SAL e isso levou ao enfraquecimento.

 

Imagem

 

Imagem

Porem o NHC disse que Gonzalo ganhou força.

 

BULLETIN
Tropical Storm Gonzalo Advisory Number   6
NWS National Hurricane Center Miami FL       AL072020
1100 PM AST Wed Jul 22 2020

...GONZALO A LITTLE STRONGER AND HEADING DUE WEST...
...EXPECTED TO BECOME A HURRICANE BY THURSDAY...
...HURRICANE WATCH ISSUED FOR BARBADOS...


SUMMARY OF 1100 PM AST...0300 UTC...INFORMATION
-----------------------------------------------
LOCATION...9.9N 45.9W
ABOUT 1045 MI...1685 KM E OF THE SOUTHERN WINDWARD ISLANDS
MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H
PRESENT MOVEMENT...W OR 270 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...998 MB...29.47 INCHES
Edited by mario junior
  • Like 3
Link to comment
Share on other sites

image.png.b6b0a8a875cb6567e7a134c16665678b.pngA imagem de satélite desta manhã é reveladora. Como o Mario Junior disse nessa madrugada, Gonzalo não aguentou a grande quantidade de ar seco que penetrou no centro da circulação ciclônica e provavelmente isso, irá interromper a intensificação por algumas horas. A aparência na imagem de satélite no momento é horrenda. Por se tratar de um ciclone tropical pequeno, há chance de Gonzalo misturar esse ar seco mais rapidamente e voltar a se intensificar. 

 

Logo atrás, uma forte onda tropical acaba de deixar o continente africano, os modelos e os meteorologistas apostam muito suas fichas no que esta onda tropical, daria origem a próxima tempestade nomeada, que seria "Isaias", uma vez que é praticamente certo que a TD 8 se torne "Hanna" hoje, ou amanhã. Os especialistas estão impressionados com o número de ciclones tropicais no atlântico até o momento, mas vale lembrar (e eles mesmo ressaltam), que 80% das tempestades se formaram nos subtropicos e até o momento nenhum sistema atingiu a intensidade de um furacão. A comparação com 2005 vem em mente, mas se pararmos para pensar, em 23 de Julho de 2005, já teríamos 6 tempestades nomeadas, 3 eram furacões (Cindy, Dennis e Emily), 2 eram grande furacões (Dennis e Emily, sendo até hoje, os dois mais poderosos na história para o mês de Julho) e Emily atingiu a Categoria 5 no dia 17 daquele mês, o único furacão a atingir essa intensidade em Julho. Outra coisa que devemos mencionar, é que a Energia Ciclônica Acumulada em 23/07/05 era de quase 60, enquanto no momento nem somamos 10. 

  • Like 5
Link to comment
Share on other sites

Douglas agora é major hurricane....

BULLETIN
Hurricane Douglas Advisory Number  12
NWS National Hurricane Center Miami FL       EP082020
1100 PM HST Wed Jul 22 2020

...DOUGLAS BECOMES A MAJOR HURRICANE...


SUMMARY OF 1100 PM HST...0900 UTC...INFORMATION
-----------------------------------------------
LOCATION...13.1N 134.0W
ABOUT 1470 MI...2365 KM ESE OF HILO HAWAII
MAXIMUM SUSTAINED WINDS...120 MPH...195 KM/H
PRESENT MOVEMENT...WNW OR 295 DEGREES AT 17 MPH...28 KM/H
MINIMUM CENTRAL PRESSURE...967 MB...28.56 INCHES


WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.

Interests in the Hawaiian Islands should monitor the progress of
Douglas.


DISCUSSION AND OUTLOOK
----------------------
At 1100 PM HST (0900 UTC), the center of Hurricane Douglas was
located near latitude 13.1 North, longitude 134.0 West. Douglas is
moving toward the west-northwest near 17 mph (28 km/h) and this
general motion is expected to continue through Saturday.

Maximum sustained winds have increased to near 120 mph (195 km/h) 
with higher gusts.  Douglas is a category 3 hurricane on the 
Saffir-Simpson Hurricane Wind Scale.  Some additional strengthening 
is possible on Thursday.  Gradual weakening is forecast to begin by 
early Friday.

Hurricane-force winds extend outward up to 25 miles (35 km) from the
center and tropical-storm-force winds extend outward up to 105 miles
(165 km).

The estimated minimum central pressure is 967 mb (28.56 inches).


HAZARDS AFFECTING LAND
----------------------
None.

Key messages for Douglas can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDEP3 and WMO header WTPZ43 KNHC.


NEXT ADVISORY
-------------
Next complete advisory at 500 AM HST.

 

  • Like 1
Link to comment
Share on other sites

TD 8 ficando bem organizado nas últimas horas.

Boias no caminho do ciclone com pressão abaixo de 1005 mbar no momento.

Não ficaria surpreso de conseguir fortalecer para furacão antes do landfall no Texas.

 

Imagem

 

Modelo mais agressivo no momento é o HMON.

 

Imagem

Edited by Felipe F
  • Like 3
Link to comment
Share on other sites

27 minutos atrás, Felipe F disse:

Modelos seguem indicando que a onda saindo da África neste momento será um poderoso furacão.

 

Imagem

 

Icon, CMC, UKMET e GFS estão indicando um breve ciclone no golfo.

Rodada de ontem do GFS.

 

Imagem

 

Alguém se recorda se Irma e Dorian se originaram de uma onda africana?

  • Like 2
Link to comment
Share on other sites

Guest
This topic is now closed to further replies.
 Share

×
×
  • Create New...

Important Information

By using this site, you agree to our Guidelines.