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WPAC Tropical Weather Outlook: 7/28/25

WPAC Tropical Weather Outlook: 7/28/25

Co-May remains weak to the NW of Okinawa, Krosa is meandering near Iwo Jima, and a large belt of gale-force winds dominates the Philippine Sea. Hurricane Iona could enter the basin this weekend.

Will Weaver
Will Weaver
western pacificwestern pacific
+1+1
Typhoon Krosa (12W) – Tropical Cyclone Advisory #11: 1200 UTC 28 July 2025

Typhoon Krosa (12W) – Tropical Cyclone Advisory #11: 1200 UTC 28 July 2025

Krosa stalling out again and weakening as it upwells cooler waters from under the sea surface.

Will Weaver
Will Weaver
western pacificwestern pacific
+1+1
Tropical Depression Co-May (11W) – Tropical Cyclone Advisory #11: 1200 UTC 28 July 2025

Tropical Depression Co-May (11W) – Tropical Cyclone Advisory #11: 1200 UTC 28 July 2025

Co-May weakens to a depression as it moves away from Okinawa.

Will Weaver
Will Weaver
western pacificwestern pacific
+1+1
Tropical Storm Co-May (11W) – Tropical Cyclone Advisory #10: 0000 UTC 28 July 2025

Tropical Storm Co-May (11W) – Tropical Cyclone Advisory #10: 0000 UTC 28 July 2025

Center of Co-May stalls out over Okinawa.

Will Weaver
Will Weaver
western pacificwestern pacific
+1+1
Typhoon Krosa (12W) – Tropical Cyclone Advisory #10: 0000 UTC 28 July 2025

Typhoon Krosa (12W) – Tropical Cyclone Advisory #10: 0000 UTC 28 July 2025

Krosa strengthens a bit more as it passes well to the east of the Ogasawara Islands.

Will Weaver
Will Weaver
western pacificwestern pacific
+1+1
Typhoon Krosa (12W) – Tropical Cyclone Advisory #9: 1500 UTC 27 July 2025

Typhoon Krosa (12W) – Tropical Cyclone Advisory #9: 1500 UTC 27 July 2025

Krosa moving away from the Northern Mariana Islands.

Will Weaver
Will Weaver
western pacificwestern pacific
+1+1
Tropical Storm Co-May (11W) – Tropical Cyclone Advisory #9: 1500 UTC 27 July 2025

Tropical Storm Co-May (11W) – Tropical Cyclone Advisory #9: 1500 UTC 27 July 2025

Co-May regenerates into a tropical storm east of Okinawa.

Will Weaver
Will Weaver
western pacificwestern pacific
+1+1
Typhoon Krosa (12W) – Tropical Cyclone Advisory #8: 0000 UTC 27 July 2025

Typhoon Krosa (12W) – Tropical Cyclone Advisory #8: 0000 UTC 27 July 2025

Krosa becomes a typhoon.

Will Weaver
Will Weaver
western pacificwestern pacific
+1+1
Severe Tropical Storm Krosa (12W) – Tropical Cyclone Advisory #7: 1500 UTC 26 July 2025

Severe Tropical Storm Krosa (12W) – Tropical Cyclone Advisory #7: 1500 UTC 26 July 2025

Krosa resumes moving northward.

Will Weaver
Will Weaver
western pacificwestern pacific
+1+1
Severe Tropical Storm Krosa (12W) – Tropical Cyclone Advisory #6: 0000 UTC 26 July 2025

Severe Tropical Storm Krosa (12W) – Tropical Cyclone Advisory #6: 0000 UTC 26 July 2025

Krosa strengthens but stalls west of the northernmost Mariana Islands.

Will Weaver
Will Weaver
western pacificwestern pacific
+1+1
Post-Tropical Cyclone Co-May (11W/Ex-Emong) – Tropical Cyclone Advisory #8 (FINAL): 0000 UTC 26 July 2025

Post-Tropical Cyclone Co-May (11W/Ex-Emong) – Tropical Cyclone Advisory #8 (FINAL): 0000 UTC 26 July 2025

Co-May becomes a remnant low. This is the last advisory.

Will Weaver
Will Weaver
western pacificwestern pacific
+1+1
Tropical Storm Krosa (#12W) – Tropical Cyclone Advisory #5: 1200 UTC 25 July 2025

Tropical Storm Krosa (#12W) – Tropical Cyclone Advisory #5: 1200 UTC 25 July 2025

Krosa stubbornly continues to strengthen despite extremely hostile environmental conditions. Not expected to be a threat to any populated land areas.

Will Weaver
Will Weaver
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