December 27

Today will be a moderately cloudy day, with a chance of heavy rain as the day goes on.

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The vertical atmospheric sounding shows a low level cloud line, and temperatures at around 25˚C (77˚F). The upper air winds are out of the west, which is contributing to the potential increase in rainfall later today.

There are two colorized infrared satellite images below, the first from earlier this morning, and then one from now.

Screen shot 2013-12-26 at 9.55.25 AM Screen shot 2013-12-26 at 9.55.13 AM

The islands are currently fairly covered by clouds. The deeper red area, corresponding to more moisture, is moving towards the islands now, and should bring additional rainfall.

The rainfall radar animation is shown below. Click the image to see the animation.

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Current activity is near Suva and Nausori, with most over the Koro Sea. This is typical for the region, and the past few days.

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December 25

Christmas day will be slightly cloudy and dry! No white Christmas forecast for Fiji.

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The webcam shows an 8:30 am image from the northwestern islands.

Screen shot 2013-12-24 at 12.23.00 PMThe large area colorized infrared satellite imagery shows that the islands have some scattered clouds, but most all of the cloud cover is far removed from the archipelago.

Below is the rainfall radar animation. Click the image to see the animation.

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As per the usual, most rainfall is over the Koro Sea, with some activity moving towards Nausori and Suva. This smattering of activity should continue as the day goes on.

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Lastly shown is the surface level analysis, with a nice message from the Fiji Met service regarding the holidays. As seen, the large cloud structures are off North of the islands, which further reinforces the relatively dry forecast for the day.

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December 24

Cooler and cloudier today over Fiji.

There will be more clouds, and cooler temperatures over the islands today, with a modest amount of rainfall.

 

The webcam image from Castaway Island is shown below.

netcam

The rainfall radar animation (click the image to see the animation) shows most activity over the Koro Sea, and the Suva region. This is consistent with the overall climate of the region.

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The vertical atmospheric sounding shows strong winds aloft out of the west, a small surface inversion, with a larger inversion at around 775 mb (2000 meters) that coincides with significant drying of the atmosphere. There are only 27 mm (a little more than an inch) of precipitable water today. That’s the lowest seen in months.

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The colorized infrared satellite imagery shows cloud cover over most all of the islands, with most of the activity just to the north west. The prevailing winds could potentially move much of this activity over the archipelago, bringing additional rain.

Screen shot 2013-12-23 at 11.29.01 AM

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December 23

Warm and dry Fiji continues today!

The large scale features from yesterday all seem to persist. There wont be a radar animation on today’s post, because it shows no activity at all.

The atmospheric sounding is shown below. The prominent drying starts at around 750mb, or 2000 meters.  This leads to a total of 30.75 mm of precipitable water over the islands, still significantly lower than what was the norm a few weeks ago. Winds aloft are out of the west, and strong.

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The colorized infrared radar shows most of the activity is off the north east coast of the islands, with scattered clouds across the archipelago. In combination with the upper air winds, it is hard to imagine a huge influx of moisture over the islands today. That being said, as tropical islands are, there should be some scattered rain throughout the day.

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The surface level analysis shows the same low and high pressure centers off to the south east and south west, respectively. The low pressure system has strengthened, which contributes to the strong winds over the islands.

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December 22

A dry day in Fiji today. There are a few scattered clouds, but nothing much to speak of in terms of moisture.

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The atmospheric sounding shows only 30.2 (1.18 inches) of precipitable water today. Nearly half of the norm earlier this month. Winds are high and out of the west. Surface temperatures at the time of this measurement are approximately 25˚C (77˚F), and should increase as the day goes on.

Screen shot 2013-12-21 at 8.26.52 AM

The infrared satellite imagery shows fairly cloudy islands, with the deeper activity to the north east. This may not effect the islands, due to the prevailing winds opposing its direction.

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The surface level analysis shows a low pressure system to the south east, with associated moisture and thunderstorms. Additionally, a high pressure system further to the south west is contributing to the structure of the winds surrounding the islands.

The animation below is of the rainfall radar. Click the image to see the animation.

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As visible, there is very little activity. Scattered and disorganized rainfall should continue as it is typical for the region.

 

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Lapse in posts

Hello!

There will be a lapse in posts on this page from December 10 through December 21, as I will be out of town.

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December 10

Significantly more rain over the islands today.

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The radar animation is shown above. Click the image to see the animation.

There is wide spread rainfall across Fiji right now. The rates are reaching as high as 50 mm/hr (nearly 2 inches per hour).

This downpour should continue throughout much of the day.

Screen shot 2013-12-09 at 8.29.16 AM

The colorized infrared satellite imagery depicts deep moisture over the islands, and full cloud cover. Given what the rainfall radar looks like, imagery like this is to be expected.

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The vertical atmospheric sounding shows a moist atmosphere, with  62.96 mm (nearly 2.5 inches) of precipitable water. Winds aloft are out of the west, and moderate. They could conceivably push the rainfall through the islands by later today, though not before a lot of rain falls.

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The sea level analysis shows a major culprit behind today’s activity is a low pressure center just to the south of the islands. It is bringing the associated rain and clouds, and should provide better air quality conditions.

 

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