Overall Green Tropical Cyclone for TWENTY-26 Off-shore from 26 Aug 2026 06:00 UTC to 27 Aug 2026 00:00 UTC

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Overall Green Tropical Cyclone for TWENTY-26

Off-shore

Global Telecommunication Service

GTS (Global Telecommunication Service) is the official Warning and Alerting channel by the World Meteorological Organization (WMO) adopted by several Warning Organizations. As soon as a new GTS message regarding Tropical Cyclones(WT) or Tsunami(WE) the messages are processed and possibly assigned to the specific event. When a new GTS message is present an new tab in the specific event report page is present.The presence of a GTS message is shown in the homepage with a dedicated icon.

Click on the messages list to visualize on the right the detailed text.

Measurements Levels

SOURCE	GAUGE LOCATION	LAT	LON	TIME (UTC)	HEIGHT (m)	PERIOD (min)

27/08 03:43 WTPQ33PGUM270341

27/08 02:13 WTPN33PGTW270300

26/08 23:31 WTPQ33PGUM262328

26/08 20:34 WTPN33PGTW262100

26/08 15:03 WTPQ33PGUM261501

26/08 14:06 WTPN33PGTW261500

26/08 09:18 WTPQ33PGUM260916

26/08 08:20 WTPN33PGTW260900

Original Message :

WTPQ33 PGUM 270341
TCPPQ3

BULLETIN
TROPICAL DEPRESSION 20W ADVISORY NUMBER 4
NATIONAL WEATHER SERVICE TIYAN GU WP202026
141 PM CHST THU AUG 27 2026

...TROPICAL DEPRESSION TWENTY SOUTHWEST OF WAKE ISLAND, MOVING
SOUTHEAST...

CHANGES WITH THIS ADVISORY
--------------------------
NONE.

WATCHES AND WARNINGS
--------------------
NONE.

SUMMARY OF 100 PM CHST...0300 UTC...INFORMATION
-----------------------------------------------
LOCATION...16.8N 161.9E

ABOUT 355 MILES WEST-SOUTHWEST OF WAKE
ABOUT 380 MILES NORTH OF ENEWETAK
ABOUT 720 MILES NORTH-NORTHEAST OF POHNPEI
ABOUT 925 MILES NORTHWEST OF MAJURO
ABOUT 1080 MILES EAST OF SAIPAN
ABOUT 1160 MILES EAST-NORTHEAST OF GUAM

MAXIMUM SUSTAINED WINDS...35 MPH
PRESENT MOVEMENT...SOUTHEAST...135 DEGREES AT 7 MPH

DISCUSSION AND OUTLOOK
----------------------
AT 100 PM CHST...0300 UTC...THE CENTER OF TROPICAL DEPRESSION 20W
WAS LOCATED NEAR LATITUDE 16.8 DEGREES NORTH AND LONGITUDE 161.9
DEGREES EAST. 20W IS MOVING SOUTHEAST AT 7 MPH. IT IS EXPECTED TO
MAKE A TURN TOWARD THE NORTHEAST WITH AN INCREASE IN FORWARD SPEED
THROUGH FRIDAY. THIS GENERAL FORECAST TRACK WILL TAKE 20W NEAR WAKE
ISLAND FRIDAY AFTERNOON.

MAXIMUM SUSTAINED WINDS REMAIN AT 35 MPH. 20W IS FORECAST TO
MAINTAIN THIS INTENSITY THROUGH TONIGHT.

NEXT ADVISORY
-------------
THE NEXT SCHEDULED ADVISORY WILL BE ISSUED BY THE NATIONAL
WEATHER SERVICE AT 800 PM CHST.

$$

MESA=

Original Message :

WTPN33 PGTW 270300
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL DEPRESSION 20W (TWENTY) WARNING NR 004//
RMKS/
1. TROPICAL DEPRESSION 20W (TWENTY) WARNING NR 004
03 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
270000Z --- NEAR 16.7N 161.4E
MOVEMENT PAST SIX HOURS - 135 DEGREES AT 06 KTS
POSITION ACCURATE TO WITHIN 040 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
REPEAT POSIT: 16.7N 161.4E
---
FORECASTS:
12 HRS, VALID AT:
271200Z --- 17.0N 163.2E
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
VECTOR TO 24 HR POSIT: 050 DEG/ 11 KTS
---
24 HRS, VALID AT:
280000Z --- 18.4N 164.9E
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 020 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
020 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 020 DEG/ 12 KTS
---
36 HRS, VALID AT:
281200Z --- 20.7N 165.9E
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT
050 NM SOUTHEAST QUADRANT
020 NM SOUTHWEST QUADRANT
// END PART 01 //

Original Message :

WTPQ33 PGUM 262328
TCPPQ3

BULLETIN
Tropical Depression 20W Advisory Number 3
National Weather Service Tiyan GU WP202026
928 AM ChST Thu Aug 27 2026

...TROPICAL DEPRESSION TWENTY NEARLY STATIONARY...

CHANGES WITH THIS ADVISORY
--------------------------
None.

WATCHES AND WARNINGS
--------------------
None.

SUMMARY OF 700 AM CHST...2100 UTC...INFORMATION
-----------------------------------------------
Location...17.3N 161.3E

About 375 miles west-southwest of Wake
About 415 miles north of Enewetak
About 740 miles north-northeast of Pohnpei
About 830 miles north of Kosrae
About 930 miles northeast of Chuuk
About 975 miles northwest of Majuro
About 1040 miles east of Saipan
About 1130 miles east-northeast of Guam

Maximum sustained winds...35 mph
Present movement...east...90 degrees at 1 mph

DISCUSSION AND OUTLOOK
----------------------
At 700 AM CHST...2100 UTC...the center of Tropical Depression 20W
was located near Latitude 17.3 degrees North and Longitude
161.3 degrees East. 20W is moving east at 1 mph. It is expected
to make a turn toward the northeast with an increase in forward
speed through Friday. This general forecast track will take 20W
fairly close to Wake Island Friday afternoon.

Maximum sustained winds remain at 35 mph. 20W is forecast to
maintain this intensity through tonight.

NEXT ADVISORY
-------------
The next scheduled advisory will be issued by the National
Weather Service at 200 PM ChST.

$$

Stanko

Original Message :

WTPN33 PGTW 262100
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL DEPRESSION 20W (TWENTY) WARNING NR 003//
RMKS/
1. TROPICAL DEPRESSION 20W (TWENTY) WARNING NR 003
02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
261800Z --- NEAR 17.2N 161.0E
MOVEMENT PAST SIX HOURS - 090 DEGREES AT 01 KTS
POSITION ACCURATE TO WITHIN 060 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
REPEAT POSIT: 17.2N 161.0E
---
FORECASTS:
12 HRS, VALID AT:
270600Z --- 17.6N 162.3E
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
VECTOR TO 24 HR POSIT: 055 DEG/ 09 KTS
---
24 HRS, VALID AT:
271800Z --- 18.6N 163.9E
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 020 NM NORTHEAST QUADRANT
050 NM SOUTHEAST QUADRANT
010 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 040 DEG/ 09 KTS
---
36 HRS, VALID AT:
280600Z --- 20.0N 165.1E
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT
050 NM SOUTHEAST QUADRANT
010 NM SOUTHWEST QUADRANT
// END PART 01 //

Original Message :

WTPQ33 PGUM 261501
TCPPQ3

BULLETIN
TROPICAL DEPRESSION 20W ADVISORY NUMBER 2
NATIONAL WEATHER SERVICE TIYAN GU WP202026
101 AM CHST THU AUG 27 2026

...TROPICAL DEPRESSION TWENTY REMAINS WEST-SOUTHWEST OF WAKE AND
IS SLOWLY MOVING WEST...

CHANGES WITH THIS ADVISORY
--------------------------
NONE.

WATCHES AND WARNINGS
--------------------
NONE.

SUMMARY OF 100 AM CHST...1500 UTC...INFORMATION
-----------------------------------------------
LOCATION...17.3N 161.3E

ABOUT 375 MILES WEST-SOUTHWEST OF WAKE
ABOUT 415 MILES NORTH OF ENEWETAK
ABOUT 740 MILES NORTH-NORTHEAST OF POHNPEI
ABOUT 830 MILES NORTH OF KOSRAE
ABOUT 930 MILES NORTHEAST OF CHUUK
ABOUT 975 MILES NORTHWEST OF MAJURO
ABOUT 1040 MILES EAST OF SAIPAN
ABOUT 1050 MILES EAST OF TINIAN
ABOUT 1090 MILES EAST-NORTHEAST OF ROTA
ABOUT 1130 MILES EAST-NORTHEAST OF GUAM

MAXIMUM SUSTAINED WINDS...35 MPH
PRESENT MOVEMENT...WEST...270 DEGREES AT 3 MPH

DISCUSSION AND OUTLOOK
----------------------
AT 100 AM CHST...1500 UTC...THE CENTER OF TROPICAL DEPRESSION 20W
WAS LOCATED NEAR LATITUDE 17.3 DEGREES NORTH AND LONGITUDE
161.3 DEGREES EAST. 20W IS MOVING WEST AT 3 MPH. IT IS EXPECTED
TO MAKE A TURN TOWARD THE EAST-NORTHEAST WITH AN INCREASE IN
FORWARD SPEED THROUGH FRIDAY. 20W WILL HAVE NO DIRECT
IMPACTS TOWARDS THE MARIANAS OR MICRONESIA.

MAXIMUM SUSTAINED WINDS HAVE INCREASED TO 35 MPH. 20W IS FORECAST
TO MAINTAIN THIS INTENSITY THROUGH FRIDAY, POTENTIALLY BECOMING A
TROPICAL STORM.

NEXT ADVISORY
-------------
THE NEXT SCHEDULED ADVISORY WILL BE ISSUED BY THE NATIONAL
WEATHER SERVICE AT 800 AM CHST.

$$

CRUZ=

Original Message :

WTPN33 PGTW 261500
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL DEPRESSION 20W (TWENTY) WARNING NR 002//
RMKS/
1. TROPICAL DEPRESSION 20W (TWENTY) WARNING NR 002
03 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
261200Z --- NEAR 17.2N 161.0E
MOVEMENT PAST SIX HOURS - 270 DEGREES AT 03 KTS
POSITION ACCURATE TO WITHIN 030 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
REPEAT POSIT: 17.2N 161.0E
---
FORECASTS:
12 HRS, VALID AT:
270000Z --- 17.6N 162.1E
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
VECTOR TO 24 HR POSIT: 060 DEG/ 09 KTS
---
24 HRS, VALID AT:
271200Z --- 18.5N 163.7E
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 025 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
020 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 045 DEG/ 10 KTS
---
36 HRS, VALID AT:
280000Z --- 19.9N 165.1E
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 030 NM NORTHEAST QUADRANT
040 NM SOUTHEAST QUADRANT
020 NM SOUTHWEST QUADRANT
// END PART 01 //

Original Message :

WTPQ33 PGUM 260916
TCPPQ3

BULLETIN
TROPICAL DEPRESSION 20W ADVISORY NUMBER 1
NATIONAL WEATHER SERVICE TIYAN GU WP202026
716 PM CHST WED AUG 26 2026

...TROPICAL DEPRESSION 20W FORMS WEST-SOUTHWEST OF WAKE
AND IS SLOWLY MOVING NORTH-NORTHWEST...

CHANGES WITH THIS ADVISORY
--------------------------
TROPICAL DEPRESSION 20W HAS JUST FORMED WEST-SOUTHWEST OF WAKE.

WATCHES AND WARNINGS
--------------------
NONE.

SUMMARY OF 700 PM CHST...0900 UTC...INFORMATION
-----------------------------------------------
LOCATION...17.3N 161.4E

ABOUT 370 MILES WEST-SOUTHWEST OF WAKE
ABOUT 745 MILES NORTH-NORTHEAST OF POHNPEI
ABOUT 1050 MILES EAST OF SAIPAN
ABOUT 1055 MILES EAST OF TINIAN
ABOUT 1095 MILES EAST-NORTHEAST OF ROTA
ABOUT 1135 MILES EAST-NORTHEAST OF GUAM

MAXIMUM SUSTAINED WINDS...30 MPH
PRESENT MOVEMENT...NORTH-NORTHWEST...335 DEGREES AT 5 MPH

DISCUSSION AND OUTLOOK
----------------------
AT 700 PM CHST...0900 UTC...THE CENTER OF TROPICAL DEPRESSION 20W
WAS LOCATED NEAR LATITUDE 17.3 DEGREES NORTH AND LONGITUDE
161.4 DEGREES EAST. 20W IS MOVING NORTH-NORTHWEST AT 5 MPH. IT IS
EXPECTED TO MAKE A TURN TOWARD THE EAST-NORTHEAST WITH A SLIGHT
INCREASE IN FORWARD SPEED THROUGH THURSDAY. 20W WILL HAVE NO DIRECT
IMPACTS TOWARDS THE MARIANAS OR MICRONESIA.

MAXIMUM SUSTAINED WINDS ARE 30 MPH. 20W IS FORECAST TO INTENSIFY
THROUGH THURSDAY, POTENTIALLY BECOMING A TROPICAL STORM.

NEXT ADVISORY
-------------
THE NEXT SCHEDULED ADVISORY WILL BE ISSUED BY THE NATIONAL
WEATHER SERVICE AT 200 AM CHST EARLY THURSDAY MORNING.

$$

WILLIAMS=

Original Message :

WTPN33 PGTW 260900
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL DEPRESSION 20W (TWENTY) WARNING NR 001//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/260551ZAPR2026//
AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT.//
RMKS/
1. TROPICAL DEPRESSION 20W (TWENTY) WARNING NR 001
03 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
260600Z --- NEAR 17.2N 161.3E
MOVEMENT PAST SIX HOURS - 335 DEGREES AT 04 KTS
POSITION ACCURATE TO WITHIN 060 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
REPEAT POSIT: 17.2N 161.3E
---
FORECASTS:
12 HRS, VALID AT:
261800Z --- 17.6N 161.6E
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
VECTOR TO 24 HR POSIT: 060 DEG/ 08 KTS
---
24 HRS, VALID AT:
270600Z --- 18.3N 163.0E
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT
060 NM SOUTHEAST QUADRANT
020 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 060 DEG/ 09 KTS
---
36 HRS, VALID AT:
271800Z --- 19.2N 164.6E
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT
// END PART 01 //

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