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[2022] 亚速尔群岛以西热带风暴“加斯顿”(08L.Gaston) - 东行影响亚速尔群岛

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超强台风

Super Typhoon

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14701
发表于 2022-9-22 17:50 | 显示全部楼层
全球热带气旋监测公报
预报:王 慧  签发:周冠博  2022 年 09 月 22 日 18 时
“加斯顿”向偏东方向移动

时       间:22日14时(北京时)

海       域:北大西洋

命       名:“加斯顿”,GASTON

中心位置:北纬40.1度、西经36.3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:1000百帕

参考位置:亚速尔群岛西偏北方向约590公里的洋面上

变化过程:过去24小时,“加斯顿”强度变化不大

预报结论:“加斯顿”将以每小时20公里左右的速度向偏东方向移动,强度变化不大。

SEVP_NMC_TCMO_SFER_EME_AGLB_L89_P9_20220922180002400_XML_1.jpg
图1 卫星红外监测图像(北京时间2022年09月22日14时00分)


“菲奥娜”向北偏东方向移动

时       间:22日14时(北京时)

海       域:北大西洋

命       名:“菲奥娜”,FIONA

中心位置:北纬26.8度、西经71.1度

强度等级:四级飓风

最大风力:17级(60米/秒,相当于我国的超强台风级)

中心气压:934百帕

参考位置:百慕大群岛西南方向约860公里的洋面上

变化过程:过去24小时,“菲奥娜”强度维持17级

预报结论:“菲奥娜”将以每小时25公里的速度向北偏东方向移动,强度维持。


图2 卫星红外监测图像(北京时间2022年09月22日14时00分)

东北太平洋热带风暴“牛顿”生成

时       间:22日14时(北京时)

海       域:东北太平洋

命       名:“牛顿”,NEWTON

中心位置:北纬17.6度、西经107.6度

强度等级:热带风暴

最大风力:10级(26米/秒,相当于我国的强热带风暴级)

中心气压:1000百帕

参考位置:墨西哥南下加利福尼亚州圣卢卡斯角南偏东方向约640公里的洋面上

变化过程:“牛顿”在今天上午生成,加强到10级

预报结论:“牛顿”将以每小时10公里左右的速度向西偏北方向移动,强度逐渐加强。


图3 卫星红外监测图像(北京时间2022年09月22日14时00分)
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发表于 2022-9-22 19:23 | 显示全部楼层
000
WTNT43 KNHC 220842
TCDAT3

Tropical Storm Gaston Discussion Number   8
NWS National Hurricane Center Miami FL       AL082022
900 AM GMT Thu Sep 22 2022

GOES-16 Enhanced BD-curve infrared imagery and a recent GMI
microwave pass showed that Gaston had maintained a deep convective
inner core during the past several hours.  Subsequently, a
primary curved band with -66C cloud tops has developed in the
western semicircle.  A compromise of the subjective satellite
intensity estimates from TAFB and SAB, along with a UW-CIMSS AiDT
estimated, yields an initial intensity of 55 kt for this advisory.

Although the intensity guidance agrees that Gaston will commence a
slow weakening trend soon, predicting when Gaston will become a
post-tropical cyclone or if it transitions into an extratropical low
is problematic. The GFS and ECMWF-SHIPS statistical diagnostics
indicate that Gaston will complete extratropical transition in just
6 hours, which appears unrealistic.  On the other hand, the FSU
Cyclone phase forecast for the GFS and UKMET suggest that the system
will maintain a symmetric lower-tropospheric warm core while moving
south of the upper westerlies on Friday.  The latter scenario seems
more reasonable since Gaston is sustaining inner core convection and
the wind flow aloft becomes a bit more diffluent as it approaches
the Azores Islands. Afterwards, the global simulated IR forecasts
show Gaston becoming a post-tropical cyclone (loss of tropical cloud
pattern characteristics) in 48 hours due to sub-24C SSTs, an
increasing stable/dry surrounding atmosphere, and strong northerly
shear.  The NHC forecast is based on the above mentioned global
model guidance and shows Gaston becoming a post-tropical cyclone on
Saturday.

Gaston's initial motion is estimated to be east-northeastward, or
070/15 kt.  The are no significant changes to the previous track
forecast or synoptic reasoning.  Gaston is expected to move
east-northeastward to eastward through Friday morning.  
Afterward, the Azores high is predicted to strengthen and cause
Gaston to gradually turn southward.  Beyond 48 hours, the
global and hurricane models indicate that the cyclone will turn
toward the west-southwest to west in response to the aforementioned
high-pressure building to the north and northeast of the system.  
The NHC forecast is based on this scenario and lies between the TVCA
and HCCA consensus models.

Because the latest forecast track of Gaston brings the cyclone near
or over the western and central Azores islands before becoming
post-tropical, The Azores Meteorological Service has issued a
Tropical Storm Warning for their western and central island chains.


FORECAST POSITIONS AND MAX WINDS

INIT  22/0900Z 40.3N  35.4W   55 KT  65 MPH
12H  22/1800Z 40.9N  32.6W   55 KT  65 MPH
24H  23/0600Z 40.7N  30.0W   55 KT  65 MPH
36H  23/1800Z 39.8N  28.8W   50 KT  60 MPH
48H  24/0600Z 38.9N  29.1W   45 KT  50 MPH...POST-TROPICAL
60H  24/1800Z 38.5N  30.4W   45 KT  50 MPH...POST-TROPICAL
72H  25/0600Z 38.6N  32.2W   40 KT  45 MPH...POST-TROPICAL
96H  26/0600Z 38.2N  35.9W   35 KT  40 MPH...POST-TROPICAL
120H  27/0600Z 37.1N  39.8W   30 KT  35 MPH...POST-TROPICAL

$$
Forecaster Roberts
084547_5day_cone_with_line_and_wind.png
al082022.20220922093257.gif
惟愿公平如滚滚流水,而正义则像永不止息的溪流。
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发表于 2022-9-22 20:43 | 显示全部楼层
535
WTNT33 KNHC 221135
TCPAT3

BULLETIN
Tropical Storm Gaston Intermediate Advisory Number 8A
NWS National Hurricane Center Miami FL       AL082022
Issued by the NWS Weather Prediction Center College Park MD
1200 PM GMT Thu Sep 22 2022

...GASTON HEADING TOWARD THE WESTERNMOST AZORES ISLANDS...
...TROPICAL STORM CONDITIONS EXPECTED TO BEGIN TONIGHT...


SUMMARY OF 1200 PM GMT...1200 UTC...INFORMATION
-----------------------------------------------
LOCATION...40.7N 34.5W
ABOUT 340 MI...550 KM WNW OF FAIAL ISLAND IN THE CENTRAL AZORES
MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H
PRESENT MOVEMENT...ENE OR 70 DEGREES AT 17 MPH...28 KM/H
MINIMUM CENTRAL PRESSURE...999 MB...29.50 INCHES


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

None.

SUMMARY OF WATCHES AND WARNING IN EFFECT:

A Tropical Storm Warning is in effect for...
* Flores and Corvo in the western Azores
* Faial, Pico, Sao Jorge, Graciosa and Terceira in the central
Azores

A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area, in this case within the
next 24 hours.

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


DISCUSSION AND OUTLOOK
----------------------
At 1200 PM GMT (1200 UTC), the center of Tropical Storm Gaston was
located near latitude 40.7 North, longitude 34.5 West. Gaston is
moving toward the east-northeast near 17 mph (28 km/h). A turn to
the east is expected by tonight, and a slower southeastern or
southward motion is forecast by early Saturday.  On the forecast
track, the center of Gaston will move near or over portions of the
Azores on Friday.

Maximum sustained winds are near 65 mph (100 km/h) with higher
gusts.  Gradual weakening is expected over the next few days.

Tropical-storm-force winds extend outward up to 60 miles (95 km)
from the center.

The estimated minimum central pressure is 999 mb (29.50 inches).


HAZARDS AFFECTING LAND
----------------------
WIND:  Tropical-storm-force winds are expected in portions of the
western Azores beginning tonight. See products issued by the
meteorological service in the Azores.

SURF:  Swells generated by Gaston are expected to affect the Azores
beginning later today.  These swells are likely to cause
life-threatening surf and rip current conditions.  Please consult
products from your local weather office.


NEXT ADVISORY
-------------
Next complete advisory at 300 PM GMT.

$$
Forecaster Cangialosi
114206_5day_cone_with_line_and_wind.png
惟愿公平如滚滚流水,而正义则像永不止息的溪流。
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发表于 2022-9-22 21:37 | 显示全部楼层
SSD 12Z分析维持T3.0
TXNT24 KNES 221207
TCSNTL
A.  08L (GASTON)
B.  22/1130Z
C.  40.8N
D.  34.5W
E.  THREE/GOES-E
F.  T3.0/3.0
G.  IR/EIR/VIS/SSMIS
H.  REMARKS...7/10 BANDING YIELDS A DT OF 3.0. THE MET IS 3.5 BASED ON
A 24 HOUR STEADY TREND. THE PT AGREES WITH THE DT. THE FT IS BASED ON
THE DT.
I.  ADDL POSITIONS
    22/0924Z 40.3N 35.7W SSMIS
...GATLING
20220922.113020.AL082022.abi.goes-16.Visible.55kts.98p5.1p0.jpg
20220922.113020.AL082022.abi.goes-16.IR-BD.55kts.98p5.1p0.jpg
20220922.092200.AL082022.ssmis.F17.89pct.55kts.25p2.1p0.jpg
20220922.092200.AL082022.ssmis.F17.color89.55kts.100p0.1p0.jpg
20220922.092200.AL082022.ssmis.F17.color37.55kts.100p0.1p0.jpg
惟愿公平如滚滚流水,而正义则像永不止息的溪流。
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发表于 2022-9-23 00:06 | 显示全部楼层
000
WTNT43 KNHC 221445
TCDAT3

Tropical Storm Gaston Discussion Number   9
NWS National Hurricane Center Miami FL       AL082022
Issued by the NWS Weather Prediction Center College Park MD
300 PM GMT Thu Sep 22 2022

Gaston has been relatively steady in strength during the past
several hours.  Recent visible and microwave images indicate that
the storm has a fairly well-defined inner core.  However, an SSMI
overpass shows that the system is tilted in the vertical due to
west-southwesterly shear.  The 12Z Dvorak estimates from TAFB and
SAB were unchanged, and the initial intensity remains 55 kt at the
high end of the classifications.  An ASCAT-B pass showed peak winds
of around 45 kt in the southeastern quadrant and given the low bias
of the instrument for these cases, this data also supports the
55-kt initial wind speed.  The 34-kt wind radii has been expanded
outward based on the scatterometer data.

The storm is still moving east-northeastward at 18 kt on the
northwestern periphery of a subtropical ridge.  A turn to the east
and a reduction in forward speed are expected tonight, followed by a
clockwise loop near or over the central and western Azores on Friday
and Saturday as the storm moves on the south side of another ridge.
The models have generally changed little this cycle, and the NHC
track forecast is very similar to the previous one.   

Despite moderate to strong shear, relatively dry air, and cool
SSTs, Gaston has been maintaining its strength.  Given that these
conditions are only expected to gradually worsen for the system, a
slow weakening trend seems likely.  The models all show a similar
theme, and the NHC intensity forecast lies near the middle of the
guidance envelope.  Gaston is expected to become post-tropical in a
couple of days when it merges with an approaching shortwave trough.

Key Messages:

1. Tropical storm conditions are expected to begin tonight in the
western Azores and will likely spread to the central Azores on
Friday.

2. Gaston is expected to produce heavy rainfall over the western
and central Azores beginning tonight and continuing into Saturday.

FORECAST POSITIONS AND MAX WINDS

INIT  22/1500Z 40.9N  33.8W   55 KT  65 MPH
12H  23/0000Z 41.2N  31.2W   55 KT  65 MPH
24H  23/1200Z 40.7N  29.3W   55 KT  65 MPH
36H  24/0000Z 39.6N  29.0W   50 KT  60 MPH
48H  24/1200Z 38.9N  30.0W   50 KT  60 MPH...POST-TROPICAL
60H  25/0000Z 38.9N  31.7W   45 KT  50 MPH...POST-TROPICAL
72H  25/1200Z 39.1N  33.6W   45 KT  50 MPH...POST-TROPICAL
96H  26/1200Z 38.3N  37.2W   35 KT  40 MPH...POST-TROPICAL
120H  27/1200Z 37.2N  40.7W   35 KT  40 MPH...POST-TROPICAL

$$
Forecaster Cangialosi/Weiss/Taylor
144656_5day_cone_with_line_and_wind.png
al082022.20220922154532.gif
惟愿公平如滚滚流水,而正义则像永不止息的溪流。
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发表于 2022-9-23 09:40 | 显示全部楼层
431
WTNT43 KNHC 222048
TCDAT3

Tropical Storm Gaston Discussion Number  10
NWS National Hurricane Center Miami FL       AL082022
Issued by the NWS Weather Prediction Center College Park MD
900 PM GMT Thu Sep 22 2022

Gaston is beginning to approach the Azores Islands. An observation
on Flores in the western Azores recently showed wind gusts to
tropical storm strength in an outer band of the storm.  Satellite
images indicate that Gaston has been relatively steady in strength
through the day with deep convection persisting near the center and
strong outflow continuing in the northern semicircle.  Since the
Dvorak estimates are unchanged, the initial intensity remains 55 kt
for this advisory.

The storm has slowed down slightly, with the latest initial motion
estimated to be east-northeastward at 15 kt.  A turn to the east and
an additional reduction in forward speed are expected overnight,
followed by a clockwise loop near or over the central and western
Azores on Friday and Saturday as the storm moves on the south side
of a building ridge.  The models have trended northward at days 4
and 5, and the NHC track forecast has been adjusted in that
direction for those time periods.

Despite moderate to strong shear, relatively dry air, and cool
SSTs, Gaston has been maintaining its strength.  Given that these
conditions are only expected to gradually worsen for the system, a
slow weakening trend seems likely.  The models all show a similar
theme, and the NHC intensity forecast lies near the middle of the
guidance envelope.  Gaston is expected to become post-tropical on
Saturday when it merges with an approaching shortwave trough.

Key Messages:

1. Tropical storm conditions are expected to begin later tonight in
the western Azores and will likely spread to the central Azores on
Friday.

2. Gaston is expected to produce heavy rainfall over the western
and central Azores beginning tonight and continuing into Saturday.  
This rainfall may result in landslides and areas of flooding.


FORECAST POSITIONS AND MAX WINDS

INIT  22/2100Z 41.1N  32.0W   55 KT  65 MPH
12H  23/0600Z 40.9N  30.1W   55 KT  65 MPH
24H  23/1800Z 40.1N  29.2W   55 KT  65 MPH
36H  24/0600Z 39.2N  29.5W   50 KT  60 MPH
48H  24/1800Z 38.8N  30.9W   50 KT  60 MPH...POST-TROPICAL
60H  25/0600Z 39.1N  33.1W   50 KT  60 MPH...POST-TROPICAL
72H  25/1800Z 39.3N  35.0W   45 KT  50 MPH...POST-TROPICAL
96H  26/1800Z 39.3N  37.8W   35 KT  40 MPH...POST-TROPICAL
120H  27/1800Z 40.5N  40.0W   35 KT  40 MPH...POST-TROPICAL

$$
Forecaster Cangialosi/Churchill/Hamrick
al082022.20220922214024.gif
惟愿公平如滚滚流水,而正义则像永不止息的溪流。
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发表于 2022-9-23 09:44 | 显示全部楼层
795
WTNT33 KNHC 222350
TCPAT3

BULLETIN
Tropical Storm Gaston Intermediate Advisory Number 10A
NWS National Hurricane Center Miami FL       AL082022
1200 AM GMT Fri Sep 23 2022

...TROPICAL STORM CONDITIONS EXPECTED OVER PORTIONS OF THE AZORES
THIS MORNING...


SUMMARY OF 1200 AM GMT...0000 UTC...INFORMATION
-----------------------------------------------
LOCATION...41.0N 31.4W
ABOUT 220 MI...355 KM NW OF FAIAL ISLAND IN THE CENTRAL AZORES
MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H
PRESENT MOVEMENT...E OR 90 DEGREES AT 17 MPH...28 KM/H
MINIMUM CENTRAL PRESSURE...999 MB...29.50 INCHES


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

None.

SUMMARY OF WATCHES AND WARNING IN EFFECT:

A Tropical Storm Warning is in effect for...
* Flores and Corvo in the western Azores
* Faial, Pico, Sao Jorge, Graciosa and Terceira in the central
Azores

A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area, in this case within the
next 24 hours.

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


DISCUSSION AND OUTLOOK
----------------------
At 1200 AM GMT (0000 UTC), the center of Tropical Storm Gaston was
located near latitude 41.0 North, longitude 31.4 West.  Gaston is
moving toward the east near 17 mph (28 km/h).  A slower
southeastward motion is forecast later today followed by a
southward, and then southwestward, motion tonight and early
Saturday.  On the forecast track, the center of Gaston will move
near or over portions of the Azores tonight through early Saturday.

Maximum sustained winds remain near 65 mph (100 km/h) with higher
gusts.  Gradual weakening is expected over the next few days.

Tropical-storm-force winds extend outward up to 115 miles (185 km)
from the center.  A wind gust of 39 mph (63 km/h) was reported at
Flores in the western Azores.

The estimated minimum central pressure is 999 mb (29.50 inches).


HAZARDS AFFECTING LAND
----------------------
Key messages for Tropical Storm Gaston can be found in the Tropical
Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header
WTNT43 KNHC and on the web at hurricanes.gov/text/MIATCDAT3.shtml.

WIND:  Tropical-storm-force winds are expected in portions of the
western and central Azores today.  See products issued by the
meteorological service in the Azores.

SURF:  Swells generated by Gaston are expected to affect portions
of the Azores through Saturday.  These swells are likely to cause
life-threatening surf and rip current conditions.  Please consult
products from your local weather office.

RAINFALL:  Gaston is expected to produce total rain accumulations
of 2 to 6 inches with isolated higher amounts across the western
and central Azores.


NEXT ADVISORY
-------------
Next complete advisory at 300 AM GMT.

$$
Forecaster Pasch
235109_5day_cone_with_line_and_wind.png
惟愿公平如滚滚流水,而正义则像永不止息的溪流。
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积分

超强台风

Super Typhoon

积分
14701
发表于 2022-9-23 12:05 | 显示全部楼层
全球热带气旋监测公报
预报:王海平  签发:高拴柱  2022 年 09 月 23 日 10 时
“加斯顿”向东偏北方向移动

时       间:23日08时(北京时)

海       域:北大西洋

命       名:“加斯顿”,GASTON

中心位置:北纬41.0度、西经31.2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:999百帕

参考位置:亚速尔群岛北偏西方向约350公里的洋面上

变化过程:过去24小时,“加斯顿”强度维持不变

预报结论:“加斯顿”将以每小时5-10公里的速度向东偏北方向缓慢移动,强度变化不大。

SEVP_NMC_TCMO_SFER_EME_AGLB_L89_P9_20220923100002400_XML_1.jpg
图1 卫星红外监测图像(北京时间2022年09月23日08时00分)


“牛顿”向西偏北方向移动

时       间:23日08时(北京时)

海       域:东北太平洋

命       名:“牛顿”,NEWTON

中心位置:北纬17.8度、西经109.4度

强度等级:热带风暴

最大风力:10级(25米/秒,相当于我国的强热带风暴级)

中心气压:1000百帕

参考位置:墨西哥南下加利福尼亚州圣卢卡斯角偏南方向约570公里的洋面上

变化过程:过去24小时,“牛顿”由7级加强到10级

预报结论:“牛顿”将以每小时25公里左右的速度向西偏北方向移动,强度变化不大。


图2 卫星红外监测图像(北京时间2022年09月23日08时00分)

“菲奥娜”向北偏东方向移动

时       间:23日08时(北京时)

海       域:北大西洋

命       名:“菲奥娜”,FIONA

中心位置:北纬30.9度、西经69.0度

强度等级:四级飓风

最大风力:17级(59米/秒,相当于我国的超强台风级)

中心气压:936百帕

参考位置:百慕大群岛西偏南方向约425公里的洋面上

变化过程:过去24小时,“菲奥娜”强度维持不变

预报结论:“菲奥娜”将以每小时25-30公里的速度向北偏东方向移动,强度逐渐减弱。


图3 卫星红外监测图像(北京时间2022年09月23日08时00分)
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发表于 2022-9-23 12:37 | 显示全部楼层
000
WTNT43 KNHC 230237
TCDAT3

Tropical Storm Gaston Discussion Number  11
NWS National Hurricane Center Miami FL       AL082022
300 AM GMT Fri Sep 23 2022

Gaston's cloud pattern is showing signs of disruption by westerly
shear with the center located near the western edge of the main
area of convection.  This was confirmed by a recent scatterometer
overpass, which showed that the intensity was, somewhat
surprisingly, still near 55 kt.  This intensity is also in
agreement with a Dvorak classification from TAFB, and so the
advisory's initial wind speed is held at that value.

The storm has continued to slow its forward speed, with the latest
initial motion estimated to be eastward at around 10 kt.  
During the next day or so, Gaston is expected to move on a
clockwise loop along the southern side of a blocking mid-level
ridge.  The official track forecast follows the multi-model
consensus prediction.  This is fairly close to the previous NHC
forecast, except shifted a little northward in the latter part of
the period.

Gaston is expected to remain in an environment of dry air, over
relatively cool SSTs, and under the influence of strong westerly
shear for the next couple of days.  These factors should lead to
gradual weakening and loss of tropical characteristics in 48 hours
or so.  The official intensity forecast is similar to the previous
one and is close to the latest Decay-SHIPS prediction.


Key Messages:

1. Tropical storm conditions are occurring over portions of the
western Azores, and will likely spread to the central Azores later
today.

2. Gaston is expected to produce heavy rainfall over the western and
central Azores today into Saturday. This rainfall may result in
landslides and areas of flooding.


FORECAST POSITIONS AND MAX WINDS

INIT  23/0300Z 41.0N  31.0W   55 KT  65 MPH
12H  23/1200Z 40.4N  29.4W   55 KT  65 MPH
24H  24/0000Z 39.3N  29.3W   50 KT  60 MPH
36H  24/1200Z 38.7N  30.4W   50 KT  60 MPH
48H  25/0000Z 38.9N  32.3W   50 KT  60 MPH...POST-TROPICAL
60H  25/1200Z 39.4N  34.4W   45 KT  50 MPH...POST-TROPICAL
72H  26/0000Z 39.8N  36.4W   40 KT  45 MPH...POST-TROPICAL
96H  27/0000Z 40.9N  38.0W   35 KT  40 MPH...POST-TROPICAL
120H  28/0000Z 41.5N  39.0W   35 KT  40 MPH...POST-TROPICAL

$$
Forecaster Pasch
023924_5day_cone_with_line_and_wind.png
al082022.20220923030429.gif
惟愿公平如滚滚流水,而正义则像永不止息的溪流。
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发表于 2022-9-23 14:13 | 显示全部楼层
000
WTNT33 KNHC 230546
TCPAT3

BULLETIN
Tropical Storm Gaston Intermediate Advisory Number 11A
NWS National Hurricane Center Miami FL       AL082022
600 AM GMT Fri Sep 23 2022

...TROPICAL STORM CONDITIONS AFFECTING THE WESTERNMOST AZORES
ISLANDS...


SUMMARY OF 600 AM GMT...0600 UTC...INFORMATION
----------------------------------------------
LOCATION...40.8N 29.9W
ABOUT 165 MI...265 KM NNW OF FAIAL ISLAND IN THE CENTRAL AZORES
MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H
PRESENT MOVEMENT...ESE OR 105 DEGREES AT 14 MPH...23 KM/H
MINIMUM CENTRAL PRESSURE...999 MB...29.50 INCHES


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

None.

SUMMARY OF WATCHES AND WARNING IN EFFECT:

A Tropical Storm Warning is in effect for...
* Flores and Corvo in the western Azores
* Faial, Pico, Sao Jorge, Graciosa and Terceira in the central
Azores

A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area, in this case within the
next 24 hours.

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


DISCUSSION AND OUTLOOK
----------------------
At 600 AM GMT (0600 UTC), the center of Tropical Storm Gaston was
located near latitude 40.8 North, longitude 29.9 West.  Gaston is
moving toward the east-southeast near 14 mph (23 km/h).  A slower
southeastward motion is forecast later today followed by a
southward, and then southwestward, motion tonight and early
Saturday.  On the forecast track, the center of Gaston will move
near or over portions of the Azores tonight through early Saturday.

Maximum sustained winds are near 65 mph (100 km/h) with higher
gusts.  Gradual weakening is expected over the next few days.

Tropical-storm-force winds extend outward up to 115 miles (185 km)
from the center.

The estimated minimum central pressure is 999 mb (29.50 inches).


HAZARDS AFFECTING LAND
----------------------
Key messages for Tropical Storm Gaston can be found in the Tropical
Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header
WTNT43 KNHC and on the web at hurricanes.gov/text/MIATCDAT3.shtml.

WIND:  Tropical-storm-force winds are expected in portions of the
western and central Azores through today.  See products issued by
the meteorological service in the Azores.

SURF:  Swells generated by Gaston are expected to affect portions
of the Azores through Saturday.  These swells are likely to cause
life-threatening surf and rip current conditions.  Please consult
products from your local weather office.

RAINFALL:  Gaston is expected to produce total rainfall
accumulations of 2 to 6 inches with isolated higher amounts across
the western and central Azores.


NEXT ADVISORY
-------------
Next complete advisory at 900 AM GMT.

$$
Forecaster Roberts
054758_5day_cone_with_line_and_wind.png
惟愿公平如滚滚流水,而正义则像永不止息的溪流。
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