Hydrologic Outlook issued May 4 at 10:52PM SST by NWS Pago Pago AS
ESFPPG A prolonged period of widespread showers is forecast to impact the Samoa region beginning Tuesday and continuing through Thursday, with rainfall intensity and coverage expected to increase significantly by Friday and into Saturday. An active trough causing this extended duration of rainfall raises the potential for localized and widespread flooding, particularly in low-lying and poor drainage areas. Peak impacts are anticipated Friday through Saturday, when the trough is most active. Rainfall totals over the event period may exceed thresholds for flash flooding, especially in areas that have already experienced saturated soil conditions in previous weeks. In addition, landslides will
Hydrologic Outlook issued February 16 at 10:08AM SST by NWS Pago Pago AS
ESFPPG We are continuing to monitor a developing South Pacific Convergence Zone (SPCZ) that is forecast to strengthen and remain over the American Samoa islands this week. Rain may be consistent and heavy at times, which may lead to flash flooding. Additionally, with the anticipated rainfall, there is an increased risk of landslides along steep mountain terrains. Keep up to date with the latest forecast information through our internet page (weather.gov/ppg), local media, social media, or NOAA Weather Radio broadcasts. For more preparedness actions, please call Territorial Emergency Management Coordination Office (TEMCO) at 699-3800. Next update will be around 10
Hydrologic Outlook issued February 15 at 10:03AM SST by NWS Pago Pago AS
ESFPPG Satellite imageries show the main axis for the South Pacific Convergence Zone (SPCZ) just south of the territory. The north edge of the main axis is slightly over American Samoa at this point. Model data projects the placement of the SPCZ over the islands in the next 2 to 3 days, and remain throughout the new week. Model projections thus far shows flash flooding conditions peaking on Sunday evening through early Monday, and again on Tuesday afternoon through the rest of the new week. Any additional rainfall will increase the risk for flash flooding and landslides in vulnerable areas
Hydrologic Outlook issued February 14 at 10:01AM SST by NWS Pago Pago AS
ESFPPG Current satellite imageries show a trough over the islands while the South Pacific Convergence Zone (SPCZ) is further south of the islands. Model data shows the SPCZ moving closer and over the islands by the new week. The SPCZ will likely produce consistent showers, heavy at times with possible thunderstorms throughout the week. Additionally, with all the anticipated rainfall, expect an increased risk of landslides, mudslides and rockslides in the steep and mountainous areas. Keep up to date with the latest forecast information through our internet page (weather.gov/ppg), local media, social media, or NOAA Weather Radio broadcasts. For more
Hydrologic Outlook issued February 13 at 10:30AM SST by NWS Pago Pago AS
ESFPPG A South Pacific Convergence Zone (SPCZ) is forecast to develop and move over the American Samoa islands on Sunday and is expected to remain for at least the majority of next week. Rain may be consistent and heavy at times, which may lead to flash flooding. Low lying areas are susceptible to flooding as well as landslides along steep mountain slopes. Keep up to date with the latest forecast information through our internet page (weather.gov/ppg), local media, social media, or NOAA Weather Radio broadcasts. For more preparedness actions, please call Territorial Emergency Management Coordination Office (TEMCO) at 699-3800. Next