Tropical Weather Discussion
Issued by NWS
Issued by NWS
677 AXPQ20 PGUM 300039 TWDPQ Tropical Weather Discussion National Weather Service Tiyan GU 1039 AM ChST Mon Sep 30 2024 Tropical Weather Discussion for the Western North Pacific between the Equator and 25N from 130E to 180. The following information is based on recent satellite imagery/data, weather observations, radar, and meteorological analysis. ...SPECIAL FEATURES... None. ...OTHER WEATHER SYSTEMS... SURFACE TROUGH... A surface trough extends from just east of Pohnpei or 7N160E to east of the RMI or 10N180. Scattered to numerous showers are seen along the trough with isolated thunderstorms. There are a couple of weak circulations embedded within the trough. This trough will slowly shift westward over the next few days and bring scattered showers to Pohnpei and Kosrae. TRADE-WIND TROUGHS... A trade-wind trough extends from 20N155E to 7N161E. Isolated to scattered showers and isolated thunderstorms are seen along this trough. The highest coverage in showers is seen where the trade-wind trough and the surface trough are converging at 7N161E. This trough will move westward over the next few days and may bring scattered showers to the Marianas later this week. SURFACE RIDGE... Surface ridging is seen across much of western Micronesia and the Marianas. This feature is suppressing convection across the region. Island convection will be possible for Palau and Yap with calm winds over the islands. This feature is expected to break down over the next couple of days as the next series of troughs enter and replace it. TUTT... A TUTT cell is located near 20N159E and extends south to 10N155E. Little to no shower activity is seen with the TUTT. This feature will shift to the northwest over the next few days. $$ Williams