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百慕大西南二级飓风“伊梅尔达”(09L.Imelda) - 与Humberto共舞,影响巴哈马群岛 - NHC:85KT

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积分

超强台风

Super Typhoon

积分
11593
发表于 2025-9-30 10:30 | 显示全部楼层
全球热带气旋监测公报
预报:董议文、张增海  签发:王海平  2025 年 09 月 30 日 10 时
“伊梅尔达”向偏北方向移动

时        间:   30日08时

海        域:    北大西洋

命        名:    “伊梅尔达”,IMELDA

中心位置:    西经77.3度,北纬28.1度

强度等级:    热带风暴

最大风力:    10级,28米/秒,相当于我国的强热带风暴级

中心气压:    986百帕

参考位置:    距离北大西洋美国佛罗里达州西棕榈滩东北方向约280公里

变化过程:    过去24小时,“伊美尔达”强度由8级增强为10级

预报结论:   “伊梅尔达”将以每小时15公里左右的速度向偏北方向移动,强度逐渐加强。



图2 卫星红外监测图像(北京时间2025年9月30日08时00分)

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超强台风

Super Typhoon

积分
11593
发表于 2025-9-30 11:10 | 显示全部楼层
本帖最后由 pocketbox 于 2025-9-30 12:30 编辑





WTNT44 KNHC 300248
TCDAT4

Tropical Storm Imelda Discussion Number  14
NWS National Hurricane Center Miami FL       AL092025
1100 PM EDT Mon Sep 29 2025

Satellite imagery and reports from an Air Force Reserve Hurricane
Hunter aircraft indicate that Imelda has lost some organization
since the last advisory. The aircraft data shows a broad center
with a radius of maximum winds of at least 35 n mi, and the
satellite imagery currently shows no organized convection near the
aircraft-reported center. In addition, satellite fixes from TAFB
and SAB were well to the northeast of the aircraft position,
suggesting the vortex has a significant vertical tilt. Despite
the ragged structure, the aircraft-reported winds support keeping
an initial intensity of 55 kt.

The initial motion is now 010/7 kt.  A turn toward the northeast is
expected tonight, followed by a turn toward the east-northeast and
a faster forward speed. This change is due partly to Hurricane
Humberto eroding the steering influence of a subtropical ridge east
of Bermuda, and partly due to a deep-layer trough that is digging
southward to the north and northwest of Imelda. The track guidance
overall is a bit slower than earlier, and based on this the new
forecast track is a little slower than the previous track. The new
forecast track indicates that tropical storm conditions are
expected to begin on the island of Bermuda in 36-48 h.

Imelda is currently in an upper-level wind environment that has
moderate shear, but is strongly divergent, and this is forecast to
continue for the next 36-48 h. This should allow some
strengthening. However, the current state of the storm is not
conducive, and thus the new intensity forecast calls for slower
strengthening than the previous forecast.  In 48-60 h, the shear
increases, and interaction with the deep-layer trough will likely
start the extratropical transition process.  This should be complete
by 72 h.  While there may be "sting jet" winds during the transition
as mentioned in the previous discussion, the guidance is in good
agreement that the system should steadily decay after the transition
is complete.  Overall, the new intensity forecast is a little weaker
compared to the previous forecast.


KEY MESSAGES:

1. Imelda is expected to intensify into a hurricane Tuesday or
Tuesday night with the cyclone approaching Bermuda during the day
Wednesday as a hurricane. A Hurricane Watch is in effect for the
island of Bermuda due to the expected onset of tropical storm
conditions beginning Wednesday afternoon.

2. Locally heavy rainfall across coastal sections of southeast
North Carolina could cause isolated flash and urban flooding
through tonight. As Imelda passes near Bermuda, 2 to 4 inches – 50
to 100 mm – of rainfall is expected from Wednesday into Thursday.

3. Swells and high surf from both Humberto and Imelda are expected
to produce dangerous marine conditions and rip currents along much
of the East Coast of the United States during the next several days.


FORECAST POSITIONS AND MAX WINDS

INIT  30/0300Z 28.4N  77.2W   55 KT  65 MPH
12H  30/1200Z 29.2N  76.3W   60 KT  70 MPH
24H  01/0000Z 30.1N  74.1W   65 KT  75 MPH
36H  01/1200Z 31.1N  70.7W   75 KT  85 MPH
48H  02/0000Z 32.4N  66.0W   80 KT  90 MPH
60H  02/1200Z 33.8N  60.7W   75 KT  85 MPH
72H  03/0000Z 35.2N  55.7W   65 KT  75 MPH...POST-TROP/EXTRATROP
96H  04/0000Z 39.4N  50.3W   55 KT  65 MPH...POST-TROP/EXTRATROP
120H  05/0000Z 43.1N  46.6W   45 KT  50 MPH...POST-TROP/EXTRATROP

$$
Forecaster Beven

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超强台风

Super Typhoon

积分
11593
发表于 2025-9-30 15:40 | 显示全部楼层
全球热带气旋监测公报
预报:董议文、张增海  签发:王海平  2025 年 09 月 30 日 18 时
“伊梅尔达”向偏北方向移动

时        间:   30日14时

海        域:    北大西洋

命        名:    “伊梅尔达”,IMELDA

中心位置:    西经77.2度,北纬28.6度

强度等级:    热带风暴

最大风力:    10级,28米/秒,相当于我国的强热带风暴级

中心气压:    986百帕

参考位置:    距离北大西洋美国佛罗里达州西棕榈滩东北方向约350公里

变化过程:    过去24小时,“伊美尔达”强度由8级增强为10级

预报结论:   “伊梅尔达”将以每小时10-15公里的速度向偏北方向移动,强度逐渐加强。



图2 卫星红外监测图像(北京时间2025年9月30日14时00分)

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超强台风

Super Typhoon

积分
11593
发表于 2025-9-30 17:05 | 显示全部楼层
本帖最后由 pocketbox 于 2025-9-30 19:10 编辑




WTNT44 KNHC 300859
TCDAT4

Tropical Storm Imelda Discussion Number  15
NWS National Hurricane Center Miami FL       AL092025
500 AM EDT Tue Sep 30 2025

Deep convection has redeveloped on the western side of Imelda
during the past several hours, though a fair portion of the
circulation has been overtaken by dry air aloft.  The last reports
overnight from an Air Force Reserve Hurricane Hunter aircraft
indicate that the pressure had fallen again to 983 mb, with some
increase in flight-level winds as they exited in the western
quadrant.  Given the improved organization on satellite since the
plane left, I'm going to nudge the maximum winds up to 60 kt on
this advisory, and another Hurricane Hunter should be in the area
this morning.  

Imelda has taken the long-awaited turn away from the mainland, now
estimated at 035/7 kt.  This general motion is expected today,
followed by a faster motion towards the east-northeast primarily
due to increasing mid-latitude southwesterly flow.  There remains
some speed differences in the models, but it is notable that all of
the guidance is near Bermuda between 36-48 h.  The new forecast is
a touch south of the previous one, perhaps reflecting some binary
steering influences from Humberto as the pair of tropical cyclones
get closer together.  

The environment around Imelda is a complicated one, with lots of
shear and dry air in the vicinity while the system remains over
warm waters.  A recent AMSR pass also shows better low-level
structure, so intensification is forecast today.  Imelda should
experience a favorable trough interaction by Wednesday, forcing an
increase in the maximum winds as Imelda undergoes a protracted
extratropical transition with lots of upper divergence and
convection.  Every model forecasts a strong sting jet to form on
the south and west side of the cyclone on Wednesday during the
later stages of the transition.  The new forecast is near a mean of
the global and regional hurricane models, showing a potent system
near Bermuda.  Imelda probably won't have a conventional hurricane
structure near that island, but there is a significant risk of high
winds due to the hybrid tropical cyclone structure expected then.  
Steady weakening is anticipated by late week after the system
passes Bermuda.


KEY MESSAGES:

1. Imelda is expected to intensify into a hurricane later today
with the cyclone approaching Bermuda during the day Wednesday as a
hurricane. A Hurricane Watch is in effect for the island of Bermuda
due to the expected onset of tropical storm conditions beginning
Wednesday afternoon.

2. Locally heavy rainfall across coastal sections of southeast
North Carolina could cause isolated flash and urban flooding
through tonight. As Imelda passes near Bermuda, 2 to 4 inches – 50
to 100 mm – of rainfall is expected from Wednesday into Thursday.

3. Swells and high surf from both Humberto and Imelda are expected
to produce dangerous marine conditions and rip currents along much
of the East Coast of the United States during the next several days.


FORECAST POSITIONS AND MAX WINDS

INIT  30/0900Z 28.8N  76.8W   60 KT  70 MPH
12H  30/1800Z 29.3N  75.7W   65 KT  75 MPH
24H  01/0600Z 30.3N  72.7W   70 KT  80 MPH
36H  01/1800Z 31.6N  68.4W   80 KT  90 MPH
48H  02/0600Z 32.8N  63.0W   85 KT 100 MPH
60H  02/1800Z 34.4N  56.9W   75 KT  85 MPH...POST-TROP/EXTRATROP
72H  03/0600Z 36.6N  51.8W   65 KT  75 MPH...POST-TROP/EXTRATROP
96H  04/0600Z 41.5N  48.0W   55 KT  65 MPH...POST-TROP/EXTRATROP
120H  05/0600Z 48.0N  40.0W   45 KT  50 MPH...POST-TROP/EXTRATROP

$$
Forecaster Blake

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点评

速報已升65kts  发表于 2025-9-30 21:26
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超强台风

Super Typhoon

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发表于 2025-9-30 23:00 | 显示全部楼层
本帖最后由 pocketbox 于 2025-9-30 23:50 编辑





WTNT44 KNHC 301456
TCDAT4

Hurricane Imelda Discussion Number  16
NWS National Hurricane Center Miami FL       AL092025
1100 AM EDT Tue Sep 30 2025

Imelda is gradually becoming better organized, with deep convection
increasing near the center and banding features becoming more
evident.  An Air Force Hurricane Hunter aircraft measured
flight-level winds that supported hurricane strength, although the
central pressure has not yet fallen very much.  The current
intensity is set, perhaps conservatively, at 70 kt.

Imelda is moving northeastward, or around 040/6 kt.  A mid-level
trough near the U.S. east coast should cause the hurricane to
accelerate east-northeastward during the next couple of days.  This
track will bring the center of the hurricane near Bermuda in 36
hours or so.  The official forecast is a bit south of the latest
simple and corrected dynamical model consensus predictions, perhaps
reflecting some binary interaction with the circulation of Humberto
as the pair of tropical cyclones get closer together.

The hurricane is embedded in an environment of moderate
south-southwesterly vertical wind shear, but will be moving over
warm waters and within a moist low- to mid-level air mass.  
Moreover, upper-level divergence associated a trough to the
northwest of Imelda is likely to produce some positive forcing for
intensification during the next day or so.  So the system is likely
to be rather potent while it passes near Bermuda.  Later in the
forecast period, the global models show the system merging with a
broad baroclinic zone over the north Atlantic.  The official
intensity forecast is similar to the latest correct consensus model
solution.

KEY MESSAGES:

1. Imelda is expected bring damaging hurricane-force-winds to
Bermuda when it passed near or over that island by Wednesday
afternoon or evening.  A Hurricane Warning is now in effect for
Bermuda.

2. Imelda is likely to cause large and damaging waves in Bermuda.

3. Heavy rainfall could cause flash flooding across Bermuda
Wednesday into Thursday.

4. Swells and high surf from both Humberto and Imelda are expected
to produce dangerous marine conditions and rip currents along much
of the East Coast of the United States during the next several days.


FORECAST POSITIONS AND MAX WINDS

INIT  30/1500Z 29.1N  76.6W   70 KT  80 MPH
12H  01/0000Z 29.8N  74.6W   75 KT  85 MPH
24H  01/1200Z 31.0N  71.0W   80 KT  90 MPH
36H  02/0000Z 32.6N  65.2W   85 KT 100 MPH
48H  02/1200Z 34.3N  60.0W   80 KT  90 MPH
60H  03/0000Z 36.7N  53.9W   75 KT  85 MPH...POST-TROPICAL
72H  03/1200Z 39.3N  50.4W   60 KT  70 MPH...POST-TROP/EXTRATROP
96H  04/1200Z 43.6N  46.4W   50 KT  60 MPH...POST-TROP/EXTRATROP
120H  05/1200Z 50.5N  37.0W   40 KT  45 MPH...POST-TROP/EXTRATROP

$$
Forecaster Pasch

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世纪风王

积分
50177
发表于 2025-10-1 04:20 | 显示全部楼层
000
WTNT34 KNHC 301733
TCPAT4

BULLETIN
Hurricane Imelda Intermediate Advisory Number 16A
NWS National Hurricane Center Miami FL       AL092025
200 PM EDT Tue Sep 30 2025

...IMELDA A LITTLE STRONGER...


SUMMARY OF 200 PM EDT...1800 UTC...INFORMATION
----------------------------------------------
LOCATION...29.2N 75.9W
ABOUT 690 MI...1115 KM WSW OF BERMUDA
MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H
PRESENT MOVEMENT...ENE OR 60 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...979 MB...28.91 INCHES


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

None.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Hurricane Warning is in effect for...
* Bermuda

A Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area.  A warning is typically issued
36 hours before the anticipated first occurrence of
tropical-storm-force winds, conditions that make outside
preparations difficult or dangerous.  Preparations to protect life
and property should be rushed to completion.

For storm information specific to your area, please monitor
products issued by your national meteorological service.


DISCUSSION AND OUTLOOK
----------------------
At 200 PM EDT (1800 UTC), the center of Hurricane Imelda was located
near latitude 29.2 North, longitude 75.9 West.  Imelda is moving
toward the east-northeast near 12 mph (19 km/h).  A generally
east-northeastward motion at a faster forward speed is expected over
the next couple of days.  On the forecast track, the center of the
hurricane should continue to move away from the Bahamas today, and
will approach Bermuda Wednesday afternoon.

Maximum sustained winds are near 85 mph (140 km/h) with higher
gusts.  Some additional strengthening is forecast during the next 48
hours.

Hurricane-force winds extend outward up to 45 miles (75 km) from
the center and tropical-storm-force winds extend outward up to 185
miles (295 km).

The minimum central pressure estimated from Air Force Hurricane
Hunter aircraft observations is 979 mb (28.91 inches).


HAZARDS AFFECTING LAND
----------------------
Key messages for Hurricane Imelda can be found in the Tropical
Cyclone Discussion under AWIPS header MIATCDAT4 and WMO header
WTNT44 KNHC.

WIND:  Hurricane conditions are expected over Bermuda by Wednesday
evening, with tropical storm conditions likely by Wednesday
afternoon.

RAINFALL:  Across Bermuda, 2 to 4 inches (50 to 100 mm) of rainfall
are expected from Wednesday into Thursday, which could lead to
flash flooding.

STORM SURGE:  In Bermuda, a dangerous storm surge is expected to
produce coastal flooding in areas of onshore winds.  The surge will
be accompanied by large and damaging waves.
  
SURF: Swells generated by Hurricane Imelda and Hurricane Humberto
are affecting the Bahamas and are currently spreading to much of the
U.S. east coast. These swells are likely to cause life-threatening
surf and rip current conditions.  Please consult products from your
local weather office.

A depiction of rip current risk for the United States can be found
at: hurricanes.gov/graphics_at4.shtml?ripCurrents


NEXT ADVISORY
-------------
Next complete advisory at 500 PM EDT.

$$
Forecaster Pasch

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世纪风王

积分
50177
发表于 2025-10-1 04:40 | 显示全部楼层
本帖最后由 ygsj24 于 2025-10-1 06:00 编辑

000
WTNT44 KNHC 302039
TCDAT4

Hurricane Imelda Discussion Number  17
NWS National Hurricane Center Miami FL       AL092025
500 PM EDT Tue Sep 30 2025

The hurricane continues to gradually become better organized, with
curved banding features becoming more prominent over the
circulation.  Deepest convection is noted over the western
semicircle of the system with tops to near -70 deg C.  Upper-level
outflow is fairly well-defined at this time.  The advisory
intensity is set at 75 kt which is in line with flight-level wind
observations from the previous Hurricane Hunter mission.  
Subjective and objective Dvorak estimates are a little lower.  
Another Air Force Reserve Unit aircraft is scheduled to investigate
Imelda soon to check on the intensity and structure of the tropical
cyclone.

Imelda is moving a little faster toward the east-northeast with a
motion estimate of 060/10 kt.  A mid-tropospheric trough near the
U.S. east coast should cause the hurricane to continue to accelerate
east-northeastward over the next couple of days.  The forecast track
brings the center of the hurricane near Bermuda in less than 36
hours, with tropical storm conditions expected to reach Bermuda by
tomorrow afternoon.   There will likely be some binary interactions
between Imelda and Humberto since the circulations of the two
systems are getting very close together.  However, it is difficult
to specify how significantly this interaction will affect
Imelda's track. The official forecast is near the southern edge
of the model guidance suite.  

The hurricane is expected to be within an environment of moderate
or stronger vertical wind shear, but in a favorable thermodynamic
environment during the next day or so.  An upper-level trough to
the northwest of Imelda could contribute to strengthening due to
baroclinic forcing and upper-level divergence while the system
nears Bermuda.  This could result in a fairly potent, if not an
entirely tropical, cyclone passing near the island tomorrow. Later
in the forecast period, the global models show the system merging
with a broad baroclinic zone over the north Atlantic, and the
simulated satellite imagery from these models takes on the
appearance of an extratropical cyclone in 2-3 days.

KEY MESSAGES:

1. Imelda is expected bring damaging hurricane-force-winds to
Bermuda when it passes near or over that island by Wednesday
afternoon or evening.  A Hurricane Warning is in effect for
Bermuda.

2. Imelda is likely to cause large and damaging waves in Bermuda.

3. Heavy rainfall could cause flash flooding across Bermuda
Wednesday into Thursday.

4. Swells and high surf from both Humberto and Imelda are expected
to produce dangerous marine conditions and rip currents along much
of the East Coast of the United States during the next several days.


FORECAST POSITIONS AND MAX WINDS

INIT  30/2100Z 29.4N  75.5W   75 KT  85 MPH
12H  01/0600Z 30.0N  73.1W   80 KT  90 MPH
24H  01/1800Z 31.2N  68.7W   85 KT 100 MPH
36H  02/0600Z 32.8N  63.4W   85 KT 100 MPH
48H  02/1800Z 34.9N  56.7W   80 KT  90 MPH
60H  03/0600Z 38.0N  51.5W   70 KT  80 MPH...POST-TROP/EXTRATROP
72H  03/1800Z 40.4N  49.1W   60 KT  70 MPH...POST-TROP/EXTRATROP
96H  04/1800Z 45.5N  43.0W   50 KT  60 MPH...POST-TROP/EXTRATROP
120H  05/1800Z 52.5N  32.0W   35 KT  40 MPH...POST-TROP/EXTRATROP

$$
Forecaster Pasch



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积分

世纪风王

积分
50177
发表于 2025-10-1 08:00 | 显示全部楼层
000
WTNT34 KNHC 302346
TCPAT4

BULLETIN
Hurricane Imelda Intermediate Advisory Number 17A
NWS National Hurricane Center Miami FL       AL092025
800 PM EDT Tue Sep 30 2025

...IMELDA HEADED TOWARD BERMUDA...
...EXPECTED TO BRING HURRICANE CONDITIONS TO THE ISLAND BY
WEDNESDAY EVENING...


SUMMARY OF 800 PM EDT...0000 UTC...INFORMATION
----------------------------------------------
LOCATION...29.4N 74.9W
ABOUT 630 MI...1015 KM WSW OF BERMUDA
MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H
PRESENT MOVEMENT...ENE OR 70 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...978 MB...28.88 INCHES


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

None.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Hurricane Warning is in effect for...
* Bermuda

A Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area.  A warning is typically issued  
36 hours before the anticipated first occurrence of
tropical-storm-force winds, conditions that make outside
preparations difficult or dangerous.  Preparations to protect life
and property should be rushed to completion.

For storm information specific to your area, please monitor
products issued by your national meteorological service.


DISCUSSION AND OUTLOOK
----------------------
At 800 PM EDT (0000 UTC), the center of Hurricane Imelda was located
near latitude 29.4 North, longitude 74.9 West.  Imelda is moving
toward the east-northeast near 12 mph (19 km/h).  An east-northeast
to northeast motion at a faster forward speed is expected over the
next couple of days.  On the forecast track, the center of the
hurricane will be near Bermuda Wednesday afternoon or evening.

Maximum sustained winds remain near 85 mph (140 km/h) with higher
gusts.  Some additional strengthening is forecast during the next
day or so.  Imelda is then expected to become an extratropical low
in a couple of days.

Hurricane-force winds extend outward up to 60 miles (95 km) from
the center and tropical-storm-force winds extend outward up to 160
miles (260 km).

The estimated minimum central pressure based on data from the Air
Force Hurricane Hunters is 978 mb (28.88 inches).


HAZARDS AFFECTING LAND
----------------------
Key messages for Hurricane Imelda can be found in the Tropical
Cyclone Discussion under AWIPS header MIATCDAT4 and WMO header
WTNT44 KNHC.

WIND:  Hurricane conditions are expected over Bermuda by Wednesday
evening, with tropical storm conditions likely by Wednesday
afternoon.

RAINFALL:  Across Bermuda, 2 to 4 inches (50 to 100 mm) of rainfall
are expected from Wednesday into Thursday, which could lead to
flash flooding.

STORM SURGE:  In Bermuda, a dangerous storm surge is expected to
produce coastal flooding in areas of onshore winds.  The surge will
be accompanied by large and damaging waves.

SURF: Swells generated by Hurricane Imelda and Hurricane Humberto
are affecting the Bahamas, Bermuda, and much of the U.S. east coast.
These swells are likely to cause life-threatening surf and rip
current conditions.  Please consult products from your local weather
office.

A depiction of rip current risk for the United States can be found
at: hurricanes.gov/graphics_at4.shtml?ripCurrents


NEXT ADVISORY
-------------
Next complete advisory at 1100 PM EDT.

$$
Forecaster Cangialosi

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1万

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超强台风

Super Typhoon

积分
11593
发表于 2025-10-1 10:40 | 显示全部楼层
全球热带气旋监测公报
预报:曹越男  签发:吕心艳  2025 年 10 月 01 日 10 时
“伊梅尔达”向东偏北方向移动

时        间:   1日08时

海        域:    北大西洋

命        名:    “伊梅尔达”,IMELDA

中心位置:    西经74.9度,北纬29.4度

强度等级:    一级飓风

最大风力:    13级,38米/秒,相当于我国的台风级

中心气压:    978百帕

参考位置:    距离北大西洋百慕大群岛西偏南方向约1015公里

变化过程:    过去24小时,“伊美尔达”强度由10级增强为13级

预报结论:   “伊梅尔达”将以每小时20公里左右的速度向东偏北方向移动,强度逐渐加强。



图3 卫星红外监测图像(北京时间2025年10月1日08时00分)

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世纪风王

积分
50177
发表于 2025-10-1 10:45 | 显示全部楼层
本帖最后由 ygsj24 于 2025-10-1 12:00 编辑

020
WTNT44 KNHC 010244
TCDAT4

Hurricane Imelda Discussion Number  18
NWS National Hurricane Center Miami FL       AL092025
1100 PM EDT Tue Sep 30 2025

Satellite images show that Imelda has developed a ragged large eye
feature with deep convection wrapping around its western side.  The
strongest thunderstorms are currently confined to the northwest
quadrant.  Despite the structural change, the Air Force Hurricane
Hunters have found that the minimum pressure and maximum winds are
about the same as earlier.  Based on that data, the initial
intensity is held at 75 kt.  This estimate is notably above the
latest satellite estimates.

Imelda is starting to pick up some forward speed and continues to
bend to the right, with the latest motion estimated to be 070/12 kt.
A much faster east-northeast to northeast motion is expected soon
in the strong flow ahead of a large-scale trough, in which Humberto
is embedded within.  This motion should take the core of Imelda near
Bermuda Wednesday evening, but weather conditions there will likely
begin to deteriorate Wednesday afternoon.  After that, a turn to
the northeast over the open Atlantic is expected.  No significant
changes were made to the previous track forecast, and this one lies
near the middle of the guidance envelope.

Imelda is expected to strengthen overnight and Wednesday as the
hurricane approaches Bermuda.  The intensification will likely be
due to a combination of tropical and non-tropical forcing, and it
could become a category 2 hurricane when it is near the island. The
models suggest that Imelda will complete extratropical transition in
about two days when it merges with a mid- to upper-level trough and
the remnants of Humberto.  The system is expected to gradually decay
after the transition. Imelda is also expected to significantly grow
in size over the next few days, which will cause the ongoing high
surf and swells to persist over a large portion of the central and
western Atlantic.


KEY MESSAGES:

1. Imelda is expected to bring damaging hurricane-force winds when
it passes near or over Bermuda Wednesday afternoon or evening.  A
Hurricane Warning is in effect for the island.

2. Imelda is expected to produce heavy rainfall that could cause
flash flooding across Bermuda Wednesday into Thursday.  Large and
damaging waves are also expected on the island.

3. Swells and high surf from both Humberto and Imelda are expected
to produce dangerous marine conditions and rip currents along much
of the East Coast of the United States during the next several days.


FORECAST POSITIONS AND MAX WINDS

INIT  01/0300Z 29.7N  73.9W   75 KT  85 MPH
12H  01/1200Z 30.7N  70.9W   85 KT 100 MPH
24H  02/0000Z 32.2N  65.7W   85 KT 100 MPH
36H  02/1200Z 33.9N  60.0W   85 KT 100 MPH
48H  03/0000Z 35.4N  54.4W   80 KT  90 MPH...POST-TROP/EXTRATROP
60H  03/1200Z 37.9N  50.3W   70 KT  80 MPH...POST-TROP/EXTRATROP
72H  04/0000Z 39.9N  48.2W   60 KT  70 MPH...POST-TROP/EXTRATROP
96H  05/0000Z 45.4N  41.2W   50 KT  60 MPH...POST-TROP/EXTRATROP
120H  06/0000Z 51.6N  30.1W   40 KT  45 MPH...POST-TROP/EXTRATROP

$$
Forecaster Cangialosi



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