An extremely active monsoonal trough in the region of American Samoa, generated an extended period of damaging winds, high surf and flooding rains. Moderate values of mid level shear and stable flow into the eastern portions of the area of responsibility hindered any one tropical circulation from developing within the trough. Therefore, there was no named tropical feature with this event. The extensive amounts of damage noted during this period, is what likely lessened storm damage experienced as Tropical Storm Vicky and Tropical Storm Wasi developed later in the week.
An extended period of sustained winds 35 to 45 mph with frequent gusts 65 to 70 mph, generated widespread damage across the American Samoan Island chain. Strong winds began over Manua Saturday Feb 15th with all of American Samoa experiencing damage Sunday Feb 16th, through early Monday Feb 17th. During this time several reports of roof damage, downed trees, downed power lines and power outages, and rock slides.

High Wind in TUTUILA, AMERICAN SAMOA
From 16-FEB-20 14:01:00 to 16-FEB-20 14:01:00 (SST-11)
Magnitude: 51.00 MG
Property damage: 5.00K
Crop damage: 5.00K
Reported by: Official NWS Observations

NWS Pago Pago official observation.

Heavy Rain in TUTUILA, AMERICAN SAMOA
From 17-FEB-20 00:00:00 to 17-FEB-20 23:00:00 (SST-11)
Location: PAGO PAGO
Property damage: 30.00K
Crop damage: 1.00K
Reported by: Emergency Manager

Road between Ta'u and Fitiuta cut off by a landslide in Manu'a due to 3.8 inches of rain recorded over a 24 hour period.

High Surf in TUTUILA, AMERICAN SAMOA
From 16-FEB-20 14:00:00 to 17-FEB-20 14:00:00 (SST-11)
Property damage: 5.00K
Crop damage: 0.00K
Reported by: County Official

High surf from an extended period of tropical convection 200 to 300 miles northwest of American Samoa and persistent strong northwest flow, generated an extended period of high surf and water piling onshore along American Samoan's north shoreline.

Strong Wind in TUTUILA, AMERICAN SAMOA
From 16-FEB-20 01:48:00 to 16-FEB-20 01:48:00 (SST-11)
Magnitude: 37.00 MG
Property damage: 5.00K
Crop damage: 5.00K
Reported by: Official NWS Observations

NWS 01:48am non-tstm wind gust.

High Wind in TUTUILA, AMERICAN SAMOA
From 16-FEB-20 23:34:00 to 16-FEB-20 23:34:00 (SST-11)
Magnitude: 59.00 MG
Property damage: 5.00K
Crop damage: 5.00K
Reported by: Official NWS Observations

An official NWS observation. Highest winds recorded was 43G68 mph. Family in Fagatogo Village lost entire roof to their home. Family in Aunu'u lost the roof to their home. Roof blown off museum in Fagatogo. Krispy Crunchy Chicken Restaurant lost the back patio. Radio station KHJ had damage to its communication tower due to strong winds. Power outages in Afono and Vatia. Samoa Airways and Talofa Airways cancelled their afternoon flights due to winds. Crops uprooted in Manu'a.

High Wind in TUTUILA, AMERICAN SAMOA
From 17-FEB-20 12:38:00 to 17-FEB-20 12:38:00 (SST-11)
Magnitude: 50.00 MG
Property damage: 5.00K
Crop damage: 5.00K
Reported by: Other Federal Agency

Impacts from the 16th is combined with the 17th as this weather event was from one day to the next. Heavy crop damage. Several homes lost their roofs.

High Surf in TUTUILA, AMERICAN SAMOA
From 16-FEB-20 18:00:00 to 17-FEB-20 05:00:00 (SST-11)
Property damage: 10.00K
Crop damage: 5.00K
Reported by: Buoy

High surf from an extended period of tropical convection 200 to 300 miles northwest of American Samoa and persistent strong northwest flow, generated an extended period of high surf and water piling onshore along American Samoan's north shoreline. Villages along north shores were battered by strong winds and high surf of 20 to 26 feet generating beach erosion, and coastal flooding. Many areas reported debris on roads. Vessels ordered by port admin to anchor outside of harbor due to winds and large surfs.

Flash Flood in TUTUILA, AMERICAN SAMOA
From 16-FEB-20 03:00:00 to 16-FEB-20 03:00:00 (SST-11)
Location: VAITOGI
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 1.00K
Reported by: Official NWS Observations

Total rainfall recorded over a 24 hour period 3.43 inches. Flooding on roads reported in several villages.