Area Forecast Discussion
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FXPQ60 PGUM 230623

Area Forecast Discussion
National Weather Service Tiyan GU
425 PM ChST Thu Mar 23 2017

.Marianas Synopsis...
A very diffuse shear line is evident on the latest visible
satellite imagery near Saipan. Partly cloudy skies are present
across the region. Moderate trade winds and isolated showers
prevail over the Marianas.


Not much occurring across the Marianas this afternoon. A fairly
quiet pattern will prevail over the next week or so. A fairly weak
and diffuse shear line is seen near Saipan. As this shear line
drifts south and continues to dissipate, cloud cover will increase
across the islands overnight along with a slight increase in
showers. Partly cloudy skies will return Friday evening and
continue through the weekend and into next week. Moderate trade
winds will continue through the weekend, then increase to fresh
early next week.


.Eastern Micronesia...
Several trade-wind disturbances are triggering showers in patchy
areas over Chuuk and Pohnpei States and over the Marshall Islands.
Fair weather is over Kosrae this afternoon. Satellite shows another
trade-wind disturbance approaching the Date Line and models indicate
it will also gradually move westward during the next few days with
patchy showers for Majuro and Kosrae by this weekend, then Pohnpei
and Chuuk early next week.

A long-period north swell generated by strong to near-gale winds
southeast of Japan will persist from Chuuk State eastward to the
Marshall Islands into early next week. Meanwhile, trade-wind swell
and wind waves are anticipated to build by this weekend across the
region. This combination will cause seas and surf to rise, and
conditions need to be monitored for possible High Surf and Small
Craft Advisories. In conjunction with an astronomical high tide
cycle of 5 to 6 feet above Mean Low Water levels early next week,
coastal inundation is also possible at Kosrae and Majuro.


.Western Micronesia...
Chuuk forecast discussion included with Eastern Micronesia section

Dry weather prevails at Yap and Koror, but converging trade winds
are causing showers in patchy areas south and southeast of Koror,
and spotty showers are between Yap and Chuuk this afternoon. Some
showers and possibly a thunderstorm could still approach Koror
tonight, but there will be a better chance for showers at both Yap
and Koror over the weekend as a series of trade-wind disturbances
arrive from the east.


Marianas Waters...None.


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