Atlantic Tropical Storm Activity
...PHILIPPE REMAINS DISORGANIZED...
As of 5:00 AM AST Tue Sep 26
the center of Philippe was located near 17.7, -49.0
with movement WNW at 13 mph.
The minimum central pressure was 1001 mb
with maximum sustained winds of about 50 mph.
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Active tropical cyclones in the Atlantic, Caribbean, and the Gulf of Mexico
000
ABNT20 KNHC 260539
TWOAT
Tropical Weather Outlook
NWS National Hurricane Center Miami FL
200 AM EDT Tue Sep 26 2023
For the North Atlantic...Caribbean Sea and the Gulf of Mexico:
Active Systems:
The National Hurricane Center is issuing advisories on Tropical
Storm Philippe, located over the central tropical Atlantic.
Eastern Tropical Atlantic (AL91):
Showers and thunderstorms associated with a tropical wave located
several hundred miles west-southwest of the Cabo Verde Islands
have shown little change in organization over the past several
hours. Environmental conditions are forecast to be conducive for
development, and a tropical depression is expected to form in 2
to 3 days as the system moves west-northwestward across the central
tropical Atlantic.
* Formation chance through 48 hours...medium...60 percent.
* Formation chance through 7 days...high...90 percent.
$$
Forecaster Pasch
...PHILIPPE REMAINS DISORGANIZED...
As of 5:00 AM AST Tue Sep 26
the center of Philippe was located near 17.7, -49.0
with movement WNW at 13 mph.
The minimum central pressure was 1001 mb
with maximum sustained winds of about 50 mph.
Issued at 500 AM AST Tue Sep 26 2023
000
WTNT32 KNHC 260841
TCPAT2
BULLETIN
Tropical Storm Philippe Advisory Number 12
NWS National Hurricane Center Miami FL AL172023
500 AM AST Tue Sep 26 2023
...PHILIPPE REMAINS DISORGANIZED...
SUMMARY OF 500 AM AST...0900 UTC...INFORMATION
----------------------------------------------
LOCATION...17.7N 49.0W
ABOUT 925 MI...1490 KM E OF THE NORTHERN LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...WNW OR 285 DEGREES AT 13 MPH...20 KM/H
MINIMUM CENTRAL PRESSURE...1001 MB...29.56 INCHES
WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.
DISCUSSION AND OUTLOOK
----------------------
At 500 AM AST (0900 UTC), the center of Tropical Storm Philippe was
located near latitude 17.7 North, longitude 49.0 West. Philippe is
moving toward the west-northwest near 13 mph (20 km/h), and this
general motion is forecast to continue for the next few days.
Maximum sustained winds are near 50 mph (85 km/h) with higher gusts.
Gradual weakening is expected during the next few days.
Tropical-storm-force winds extend outward up to 175 miles (280 km)
from the center.
The estimated minimum central pressure is 1001 mb (29.56 inches).
HAZARDS AFFECTING LAND
----------------------
None.
NEXT ADVISORY
-------------
Next complete advisory at 1100 AM AST.
$$
Forecaster Pasch
Issued at 0900 UTC TUE SEP 26 2023
858
WTNT22 KNHC 260840
TCMAT2
TROPICAL STORM PHILIPPE FORECAST/ADVISORY NUMBER 12
NWS NATIONAL HURRICANE CENTER MIAMI FL AL172023
0900 UTC TUE SEP 26 2023
NOTICE... LAND-BASED TROPICAL CYCLONE WATCHES AND WARNINGS ARE NO
LONGER INCLUDED IN THE TROPICAL CYCLONE FORECAST/ADVISORY...(TCM).
CURRENT LAND-BASED COASTAL WATCHES AND WARNINGS CAN BE FOUND IN THE
MOST RECENTLY ISSUED TROPICAL CYCLONE PUBLIC ADVISORY...(TCP).
TROPICAL STORM CENTER LOCATED NEAR 17.7N 49.0W AT 26/0900Z
POSITION ACCURATE WITHIN 25 NM
PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 285 DEGREES AT 11 KT
ESTIMATED MINIMUM CENTRAL PRESSURE 1001 MB
MAX SUSTAINED WINDS 45 KT WITH GUSTS TO 55 KT.
34 KT.......130NE 150SE 0SW 50NW.
12 FT SEAS..240NE 150SE 30SW 180NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.
REPEAT...CENTER LOCATED NEAR 17.7N 49.0W AT 26/0900Z
AT 26/0600Z CENTER WAS LOCATED NEAR 17.6N 48.5W
FORECAST VALID 26/1800Z 18.2N 50.4W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT...120NE 130SE 0SW 60NW.
FORECAST VALID 27/0600Z 19.1N 52.1W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT...120NE 120SE 0SW 60NW.
FORECAST VALID 27/1800Z 20.1N 53.9W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT...100NE 90SE 0SW 50NW.
FORECAST VALID 28/0600Z 21.0N 55.4W
MAX WIND 40 KT...GUSTS 50 KT.
34 KT... 90NE 90SE 0SW 50NW.
FORECAST VALID 28/1800Z 21.6N 56.9W
MAX WIND 40 KT...GUSTS 50 KT.
34 KT... 80NE 70SE 0SW 50NW.
FORECAST VALID 29/0600Z 21.9N 58.2W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 70NE 70SE 0SW 0NW.
EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 125 NM
ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY
OUTLOOK VALID 30/0600Z 21.8N 60.9W
MAX WIND 30 KT...GUSTS 40 KT.
OUTLOOK VALID 01/0600Z 21.8N 63.6W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 17.7N 49.0W
NEXT ADVISORY AT 26/1500Z
$$
FORECASTER PASCH
Issued at 500 AM AST Tue Sep 26 2023
000
WTNT42 KNHC 260844
TCDAT2
Tropical Storm Philippe Discussion Number 12
NWS National Hurricane Center Miami FL AL172023
500 AM AST Tue Sep 26 2023
West-southwesterly vertical wind shear, associated with an
upper-level low near 26N 50W, continues to affect Philippe. The
low-level center of the tropical cyclone is located near the
western edge of an area of rather disorganized deep convection.
Some sporadic convection has been redeveloping nearer to the center
of the system, but overall Philippe's cloud pattern remains
disheveled in appearance and lacks banding features. The current
intensity estimate is kept at 45 kt in deference to the earlier
scatterometer data. However, subjective and objective Dvorak
intensity estimates are somewhat lower.
The global models indicate that the vertical shear over Philippe
is not likely to abate significantly during the forecast period,
with upper-tropospheric westerlies dominating the flow to the north
and northeast of the Greater Antilles through 120 hours. Also, the
model guidance indicates that Philippe will be encountering a
somewhat drier low- to mid-level air mass during the next several
days. These environmental factors should lead to gradual weakening,
and thus Philippe is forecast to become a depression and then a
remnant low in 3 and 5 days, respectively. This is in good
agreement with the corrected consensus intensity model, HCCA,
guidance.
Over the past day or so, the storm has been moving westward to
west-northwestward and the current motion estimate is 285/11 kt. A
weak mid-level ridge is expected to be maintained to the north
of Philippe for the next few days, which is likely to keep steering
the cyclone on a generally west-northwestward track. Later in the
forecast period, Philippe should be a weaker, shallower system and
move on a mainly westward heading, following the low-level easterly
flow. The official track forecast is similar to the previous NHC
track, only a little to the left and slightly faster in 3-5 days.
This lies between the model consensus and the latest ECMWF
prediction, which is even faster and a little farther south.
FORECAST POSITIONS AND MAX WINDS
INIT 26/0900Z 17.7N 49.0W 45 KT 50 MPH
12H 26/1800Z 18.2N 50.4W 45 KT 50 MPH
24H 27/0600Z 19.1N 52.1W 45 KT 50 MPH
36H 27/1800Z 20.1N 53.9W 45 KT 50 MPH
48H 28/0600Z 21.0N 55.4W 40 KT 45 MPH
60H 28/1800Z 21.6N 56.9W 40 KT 45 MPH
72H 29/0600Z 21.9N 58.2W 35 KT 40 MPH
96H 30/0600Z 21.8N 60.9W 30 KT 35 MPH
120H 01/0600Z 21.8N 63.6W 25 KT 30 MPH...POST-TROP/REMNT LOW
$$
Forecaster Pasch
Issued at 0900 UTC TUE SEP 26 2023
000
FONT12 KNHC 260841
PWSAT2
TROPICAL STORM PHILIPPE WIND SPEED PROBABILITIES NUMBER 12
NWS NATIONAL HURRICANE CENTER MIAMI FL AL172023
0900 UTC TUE SEP 26 2023
AT 0900Z THE CENTER OF TROPICAL STORM PHILIPPE WAS LOCATED NEAR
LATITUDE 17.7 NORTH...LONGITUDE 49.0 WEST WITH MAXIMUM SUSTAINED
WINDS NEAR 45 KTS...50 MPH...85 KM/H.
Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH)
ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME
EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME
CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 HOURS FROM Z TIME
WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS
CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST
...34 KT (39 MPH... 63 KM/H)...
...50 KT (58 MPH... 93 KM/H)...
...64 KT (74 MPH...119 KM/H)...
FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS
PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE
OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING
AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY)
(CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN
06Z TUE AND THE FORECAST HOUR (CUMULATIVE PROBABILITY)
PROBABILITIES ARE GIVEN IN PERCENT
X INDICATES PROBABILITIES LESS THAN 1 PERCENT
PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN
THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT.
PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY
64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT.
- - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - -
FROM FROM FROM FROM FROM FROM FROM
TIME 06Z TUE 18Z TUE 06Z WED 18Z WED 06Z THU 06Z FRI 06Z SAT
PERIODS TO TO TO TO TO TO TO
18Z TUE 06Z WED 18Z WED 06Z THU 06Z FRI 06Z SAT 06Z SUN
FORECAST HOUR (12) (24) (36) (48) (72) (96) (120)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
LOCATION KT
$$
FORECASTER PASCH

5-Day Uncertainty Track last updated Tue, 26 Sep 2023 08:45:15 GMT
Wind Speed Probabilities last updated Tue, 26 Sep 2023 08:45:15 GMT