Pago Pago, American Samoa Weather Conditions

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Current Conditions

  • 86°
  • Overcast
  • Wind: SW 9 mph
  • Humidity: 67%
  • Visibility: 10.0 miles
  • Dew Point: 74°
  • Pressure: 29.92 in. -
  • Heat Index: 94

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Next 12 Hours

11  am
2  pm
5  pm
8  pm
11  pm
Partly Cloudy
Partly Cloudy
Rain Showers
Rain Showers
Rain Showers
Rain Showers
Mostly Cloudy
Mostly Cloudy
Partly Cloudy
Partly Cloudy
86°
90°
86°
82°
81°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Saturday
  • Rain Showers
  • High: 90 °
  • Low: 77 °
  • Rain Showers
  • Sunday
  • Rain Showers
  • High: 88 °
  • Low: 79 °
  • Rain Showers
  • Monday
  • Chance of Rain
  • High: 88 °
  • Low: 77 °
  • Chance of Rain
  • Tuesday
  • Partly Cloudy
  • High: 88 °
  • Low: 77 °
  • Partly Cloudy
  • Wednesday
  • Partly Cloudy
  • High: 88 °
  • Low: 77 °
  • Partly Cloudy

Forecast for Pago Pago, American Samoa

Updated: 11:00 PM HST on September 19, 2014

  • Saturday

    Partly cloudy with rain showers in the afternoon. High of 90F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.

  • Saturday Night

    Partly cloudy. Low of 77F. Winds less than 5 mph.

  • Sunday

    Clear in the morning, then mostly cloudy with rain showers. High of 88F. Winds from the North at 5 to 10 mph shifting to the WNW in the afternoon. Chance of rain 20%.

  • Sunday Night

    Overcast with rain showers in the evening, then mostly cloudy. Low of 79F. Winds less than 5 mph. Chance of rain 20%.

  • Monday

    Clear in the morning, then mostly cloudy with a chance of rain. High of 88F. Winds from the SSW at 5 to 10 mph shifting to the WNW in the afternoon. Chance of rain 20%.

  • Monday Night

    Mostly cloudy in the evening, then clear. Low of 77F. Winds less than 5 mph.

  • Tuesday

    Clear in the morning, then partly cloudy. High of 88F. Winds from the NNW at 5 to 10 mph.

  • Tuesday Night

    Partly cloudy. Low of 77F. Winds less than 5 mph.

  • Wednesday

    Partly cloudy. High of 88F. Winds from the NNW at 5 to 10 mph.

  • Wednesday Night

    Partly cloudy. Low of 77F. Winds less than 5 mph.

  • Thursday

    Partly cloudy. High of 86F. Winds from the WNW at 5 to 10 mph.

  • Thursday Night

    Partly cloudy. Low of 77F. Winds less than 5 mph.

  • Friday

    Clear with a chance of a thunderstorm. High of 86F. Winds from the WNW at 10 to 15 mph. Chance of rain 40%.

  • Friday Night

    Mostly cloudy with a chance of a thunderstorm. Low of 77F. Winds from the WNW at 5 to 10 mph. Chance of rain 20%.

  • Saturday

    Partly cloudy with a chance of a thunderstorm. High of 86F. Winds from the WNW at 5 to 10 mph. Chance of rain 40%.

  • Saturday Night

    Partly cloudy with a chance of a thunderstorm. Low of 75F. Winds from the NW at 5 to 10 mph shifting to the North after midnight. Chance of rain 50%.

  • Sunday

    Partly cloudy with a chance of a thunderstorm. High of 86F. Winds less than 5 mph. Chance of rain 40%.

  • Sunday Night

    Overcast with a chance of a thunderstorm. Low of 77F. Winds less than 5 mph. Chance of rain 50% with rainfall amounts near 0.3 in. possible.

  • Monday

    Partly cloudy with a chance of a thunderstorm. High of 86F. Winds less than 5 mph. Chance of rain 50%.

  • Monday Night

    Partly cloudy with a chance of a thunderstorm. Low of 77F. Winds from the East at 5 to 10 mph. Chance of rain 60% with rainfall amounts near 0.5 in. possible.

  • Tuesday

    Mostly cloudy with a chance of a thunderstorm. High of 86F. Winds less than 5 mph. Chance of rain 60%.

  • Tuesday Night

    Mostly cloudy with a chance of a thunderstorm. Low of 77F. Winds less than 5 mph. Chance of rain 50% with rainfall amounts near 0.4 in. possible.

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NWS Forecaster Discussion




Area forecast discussion 
National Weather Service tiyan GU 
445 am chst sun Sep 21 2014 


Marianas synopsis... 
radar shows some showers east of Guam and Rota...associated with a 
weak inverted trough along 148e. Otherwise...light east winds and 
isolated showers are present across the marianas waters. Seas are 
running 3-4 feet at the buoys. 


&& 


Discussion... 
GFS quickly weakens the trough and associated showers out east 
later this morning and diurnal trends favor killing off most of 
the showers as well. By the end of the day...the developing 
monsoon trough forecast by the GFS/ECMWF/navgem will already be 
taking shape in the marianas...extending west from a circulation 
north of Pohnpei centered near 14n157e. The overall forecast 
remains the same as previous...except have extended isolated 
thunderstorms that start on Monday through the week as the 
developing monsoon circulation moves slowly northwest the next few days 
and a monsoon tail tries to develop south of it...keeping 
conditions in the marianas unsettled for an extended period. 


&& 


Marine... 
marine grids look fine as is...and have made no changes. Combined 
seas late in the week will be heavily dependent on how strong our 
developing circulation becomes. GFS is quite aggressive with it... 
but that is a known bias. European model (ecmwf) is slower...which looks reasonable 
and seas are based mainly on it. 


&& 


Eastern micronesia... 
a monsoon trough is developing across the region as predicted by the 
gfs40. A weak circulation is present along the trough to the north 
of Kosrae. This situation will maintain an overall unstable pattern 
over the region for the next few days...however most of the activity 
with the trough will remain north of 10n. The latest GFS indicates 
the trough and circulation will drift west-northwestward over the 
next few days with weak ridging building in over Kosrae tonight... 
giving Kosrae a brief period of dry conditions tonight into Monday. 
As the monsoon trough continues to develop...expect moist conditions 
to continue over the region through midweek. Majuro will see the 
quickest return to fair conditions...with drier weather expected 
there by Tuesday. The drier pattern will move into Kosrae by 
Wednesday. For Pohnpei...it is a little more difficult to see when 
the drier conditions will move in. The gfs40 develops the circulation 
north of Kosrae fairly quickly and moves it west-northwestward... 
bringing drier conditions to Pohnpei by Wednesday. The European model (ecmwf) also 
develops the circulation...but a bit slower. This keeps moist 
conditions in at Pohnpei through the end of the week. Chose to 
maintain inherited forecast for now to see which model is more in 
line with what actually occurs. 


&& 


Western micronesia... 
a monsoon trough extends northeastward from near eq131e through a 
broad circulation centered south of Yap...then continues 
northeastward into eastern micronesia. This trough developed as 
predicted by the gfs40 over the last few days. Koror and Yap will 
see a few showers around the area as the circulation and trough 
drift northward through tonight with the trough establishing itself 
north of 10n by Monday. Drier conditions will then be in place over 
both locations through the end of the week. For Chuuk...converging 
winds east of the circulation will bring a period of scattered 
showers to the state tonight and Monday. Conditions will improve a 
bit Monday night as the trough and circulation drift further north. 
Though the showers will decrease to isolated...an overall unstable 
pattern will continue over Chuuk through the end of the week. 


&& 


Gum watches/warnings/advisories... 
GU...none. 
Marianas waters...none. 
&& 


$$ 


Middlebrooke/kleeschulte 



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