Twenty-Eight

Western Pacific Tropical Depression · WP282026

16.4°N, 150.8°E

Moving north-northwest at 5 mph

Max Winds

30 mph

Pressure

1006 mb

Forecast Points

Plain Language Summary

At 10 AM Monday Guam time, Tropical Depression Twentyeight was about 435 miles east-northeast of Guam, moving north-northwest at about 5 mph. Maximum sustained winds were 30 mph (JTWC's one-minute average).

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Forecast intensity

JTWC forecast maximum sustained winds (mph) by hour.

JTWC Warning #1 12 Oct 00:00 UTC

WTPN31 PGTW 120300
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL DEPRESSION 28W (TWENTYEIGHT) WARNING NR 001//
RMKS/
1. TROPICAL DEPRESSION 28W (TWENTYEIGHT) WARNING NR 001    
   02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   120000Z --- NEAR 16.4N 150.8E
     MOVEMENT PAST SIX HOURS - 335 DEGREES AT 04 KTS
     POSITION ACCURATE TO WITHIN 045 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: 16.4N 150.8E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   121200Z --- 17.3N 149.7E
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   VECTOR TO 24 HR POSIT: 300 DEG/ 09 KTS
    ---
   24 HRS, VALID AT:
   130000Z --- 18.2N 148.1E
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   VECTOR TO 36 HR POSIT: 305 DEG/ 10 KTS
    ---
   36 HRS, VALID AT:
   131200Z --- 19.4N 146.3E
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   VECTOR TO 48 HR POSIT: 310 DEG/ 11 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   140000Z --- 20.8N 144.5E
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
120300Z POSITION NEAR 16.6N 150.5E.
12OCT26. TROPICAL DEPRESSION 28W (TWENTYEIGHT), LOCATED
APPROXIMATELY 378 NM EAST-NORTHEAST OF ANDERSEN AFB, HAS TRACKED
NORTH-NORTHWESTWARD AT 04 KNOTS OVER THE PAST SIX HOURS.
MINIMUM CENTRAL PRESSURE AT 120000Z IS 1006 MB. MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 120000Z IS 10 FEET. NEXT WARNINGS
AT 120900Z, 121500Z, 122100Z AND 130300Z. REFER TO TYPHOON
27W (KOGUMA) WARNINGS (WTPN33 PGTW) FOR SIX-HOURLY UPDATES.//
NNNN

Forecast Reasoning JTWC's prognostic reasoning behind this warning Advanced

Satellite Imagery (IR) Advanced

Products not available for West Pacific storms

NEXRAD radar — no radar coverage over the open West Pacific.
Storm-surge inundation — no public storm-surge model for this basin.
Wind-speed probabilities — JTWC does not publish them.
Watches and warnings — issued by local agencies (PAGASA, JMA, CWA), not JTWC.
Reconnaissance aircraft — no routine aircraft reconnaissance in the West Pacific.
Rapid-intensification and shear diagnostics — SHIPS-based guidance is not published for this basin.

These are data-availability limits for the West Pacific basin, not omissions.

Source: U.S. Navy/Air Force Joint Typhoon Warning Center (JTWC), via the UCAR Tropical Cyclone Guidance Project. JTWC data is in the public domain. · Updated 2026-10-12 03:28 UTC · JMA analysis: Source: Japan Meteorological Agency (10-minute average winds).