Chan-Hom

Western Pacific Tropical Storm · WP142026

29.2°N, 160.8°E

Moving NW at 17 mph

Max Winds

50 mph

Pressure

987 mb

Forecast Points

JMA Winds (10-min avg)

40.0 kt

JMA Pressure

994.0 hPa

JMA (10-min average): Typhoon No. 2615 · Chan-hom

Summary

Tropical Storm Chan-Hom is currently producing maximum sustained winds of 50 mph. As of 070000Z, it was located about 472 nautical miles northeast of Minami Tori Shima and has been moving northwest at about 17 mph over the past six hours. The forecast keeps Chan-Hom on a generally northwest to west-northwest track through the next couple of days, then trending more north-northwest before turning back toward the west later in the period. Forecast positions take the center from early 07 Aug to 08 Aug farther northwest and west-northwest, then to 09–10 Aug farther north-northwest, and by 11–12 Aug to the west. Chan-Hom is expected to hold near tropical-storm strength through at least 36 hours (around 52 mph), then briefly strengthen to about 58 mph from roughly 48 to 72 hours. After that, it is forecast to weaken back to around 52 mph by 96 hours and about 46 mph by 120 hours, when it is forecast to be becoming subtropical. The storm also has a large area of tropical-storm-force winds over open water, and significant waves were estimated at 23 feet at 070000Z.

Key messages

Chan-Hom is a tropical storm with 50 mph sustained winds, moving northwest and forecast to continue generally northwest to west-northwest before a later turn.
Chan-Hom is forecast to peak near 58 mph (50 kt) around 48–72 hours, then weaken and become subtropical by 120 hours.
A large area of strong winds over open water and high seas (23 feet reported at 070000Z) will be a major hazard near the storm.

Forecast intensity

JTWC forecast maximum sustained winds (mph) by hour.

Satellite Imagery (IR)

CIRA/RAMMB · 07 Aug 02:30 UTC

JTWC Warning #1 07 Aug 00:00 UTC

WTPN33 PGTW 070300
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL STORM 14W (CHAN-HOM) WARNING NR 001//
REF/C/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/061921ZAUG2026//
AMPN/REF C IS A TROPICAL CYCLONE FORMATION ALERT.//
RMKS/
1. TROPICAL STORM 14W (CHAN-HOM) 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:
   070000Z --- NEAR 29.2N 160.8E
     MOVEMENT PAST SIX HOURS - 310 DEGREES AT 15 KTS
     POSITION ACCURATE TO WITHIN 015 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 034 KT WINDS - 320 NM NORTHEAST QUADRANT
                            100 NM SOUTHEAST QUADRANT
                            100 NM SOUTHWEST QUADRANT
                            245 NM NORTHWEST QUADRANT
   REPEAT POSIT: 29.2N 160.8E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   071200Z --- 30.9N 159.0E
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 034 KT WINDS - 280 NM NORTHEAST QUADRANT
                            090 NM SOUTHEAST QUADRANT
                            080 NM SOUTHWEST QUADRANT
                            190 NM NORTHWEST QUADRANT
   VECTOR TO 24 HR POSIT: 305 DEG/ 13 KTS
    ---
   24 HRS, VALID AT:
   080000Z --- 32.3N 156.5E
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 034 KT WINDS - 230 NM NORTHEAST QUADRANT
                            080 NM SOUTHEAST QUADRANT
                            070 NM SOUTHWEST QUADRANT
                            150 NM NORTHWEST QUADRANT
   VECTOR TO 36 HR POSIT: 295 DEG/ 14 KTS
    ---
   36 HRS, VALID AT:
   081200Z --- 33.4N 153.4E
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 034 KT WINDS - 190 NM NORTHEAST QUADRANT
                            080 NM SOUTHEAST QUADRANT
                            070 NM SOUTHWEST QUADRANT
                            130 NM NORTHWEST QUADRANT
   VECTOR TO 48 HR POSIT: 285 DEG/ 09 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   090000Z --- 33.8N 151.2E
   MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 050 KT WINDS - 020 NM NORTHEAST QUADRANT
                            060 NM SOUTHEAST QUADRANT
                            010 NM SOUTHWEST QUADRANT
                            000 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 180 NM NORTHEAST QUADRANT
                            090 NM SOUTHEAST QUADRANT
                            090 NM SOUTHWEST QUADRANT
                            120 NM NORTHWEST QUADRANT
   VECTOR TO 60 HR POSIT: 295 DEG/ 06 KTS
    ---
   60 HRS, VALID AT:
   091200Z --- 34.3N 149.8E
   MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 050 KT WINDS - 060 NM NORTHEAST QUADRANT
                            050 NM SOUTHEAST QUADRANT
                            000 NM SOUTHWEST QUADRANT
                            000 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 210 NM NORTHEAST QUADRANT
                            150 NM SOUTHEAST QUADRANT
                            060 NM SOUTHWEST QUADRANT
                            110 NM NORTHWEST QUADRANT
   VECTOR TO 72 HR POSIT: 320 DEG/ 08 KTS
    ---
   72 HRS, VALID AT:
   100000Z --- 35.5N 148.5E
   MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
                            000 NM SOUTHEAST QUADRANT
                            000 NM SOUTHWEST QUADRANT
                            000 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 190 NM NORTHEAST QUADRANT
                            130 NM SOUTHEAST QUADRANT
                            060 NM SOUTHWEST QUADRANT
                            100 NM NORTHWEST QUADRANT
   VECTOR TO 96 HR POSIT: 320 DEG/ 13 KTS
    ---
   LONG RANGE OUTLOOK:
    ---
   96 HRS, VALID AT:
   110000Z --- 39.2N 144.1E
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 034 KT WINDS - 170 NM NORTHEAST QUADRANT
                            080 NM SOUTHEAST QUADRANT
                            070 NM SOUTHWEST QUADRANT
                            110 NM NORTHWEST QUADRANT
   VECTOR TO 120 HR POSIT: 285 DEG/ 13 KTS
    ---
   120 HRS, VALID AT:
   120000Z --- 40.5N 137.4E
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   BECOMING SUBTROPICAL
   RADIUS OF 034 KT WINDS - 310 NM NORTHEAST QUADRANT
                            000 NM SOUTHEAST QUADRANT
                            000 NM SOUTHWEST QUADRANT
                            090 NM NORTHWEST QUADRANT
    ---
REMARKS:
070300Z POSITION NEAR 29.6N 160.3E.
07AUG26. TROPICAL STORM 14W (CHAN-HOM), LOCATED APPROXIMATELY 472
NM NORTHEAST OF MINAMI TORI SHIMA, HAS TRACKED NORTHWESTWARD AT
15 KNOTS OVER THE PAST SIX HOURS. MINIMUM CENTRAL PRESSURE AT 070000Z 
IS 987 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 070000Z IS 23 FEET. NEXT 
WARNINGS AT 070900Z, 071500Z, 072100Z AND 080300Z. REFER TO TYPHOON 
12W (DOLPHIN) WARNINGS (WTPN31 PGTW) FOR SIX-HOURLY UPDATES. REFER TO 
TROPICAL DEPRESSION 13W (KUJIRA) FINAL WARNING (WTPN32 PGTW).
2. THIS CANCELS AND SUPERSEDES REF C (WTPN21 PGTW 061930).//
NNNN

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 2026-08-07 02:34 UTC · JMA analysis: Source: Japan Meteorological Agency (10-minute average winds). Satellite imagery: CIRA/RAMMB.