Hurricane Season 2009 #2:

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Microwave imagery from NASA's Aqua satellite revealed extremely high thunderstorms in Typhoon Choi-Wan as it began passing the island of Sai-Pan in the Western Pacific Ocean. The U.S. National Weather Service has already issued a tropical storm warning and a typhoon watch for Tinian, Saipan and Agrihan in the Northern Mariana Islands.

Saipan is the largest island and capital of the U.S. Commonwealth of the Northern Mariana Islands. The Northern Marianas are a chain of 15 tropical islands belonging to the Marianas archipelago in the western Pacific Ocean. In the year 2000, the island chain was home to more than 62,000 residents. The National Weather Service issues advisories for them, because they are a U.S. Commonwealth.

NASA satellite imagery showed that the tops of the thunderstorms are so high they reached the tropopause, the level of atmosphere between the troposphere and stratosphere. Those high thunderstorms mean very heavy rainfall for the area underneath. The cloud tops extended to the 200 millibar level in the atmosphere where temperatures are as cold or colder than -63 Fahrenheit.

Microwave images are created when data from NASA's Aqua satellite Atmospheric Infrared Sounder (AIRS) and Advanced Microwave Sounding Unit (AMSU) instruments are combined. These microwave images indicate where there is precipitation or ice in the cloud tops and the latest microwave image revealed Choi-Wan had cold, high thunderstorms.

On August 14 at 11 a.m. EDT, Choi-Wan was located 105 miles east-northeast of Saipan, near 16.2 north and 147.3 east. It was moving northwest near 5 mph. The storm has intensified over the last six hours in an area with warm waters and low wind shear. Choi-Wan's maximum sustained winds were near 90 mph and those winds were kicking up very high waves, as high as 29 feet. The typhoon is expected to pass north of Saipan Tuesday morning.

Residents of Saipan is already experiencing gusty winds and rains as the Choi-Wan passes to the northeast, and dangerous surf is expected along the shorelines. For a look at local radar from Andersen Air Force Base, Guam: http://radar.weather.gov/radar.php?rid=GUA&product=NCR&overlay=11101111&loop=yes

Storm surge and inundation of 3 to 5 feet above high tide is possible as Choi-Wan passes with hazardous surf of 8 to 12 feet along west facing reefs this evening...building to 13 to 16 feet tonight. High tide is expected around 6 p.m. local time on Tuesday.

The National Weather Service also expects locally heavy rainfall through early Wednesday Morning with totals of 3 to 5 inches on Tinian and Saipan and as much as 6 to 10 inches possible on Agrihan and Alamagan.

The National Weather Service issued a special bulletin at 10:09 p.m. local time (CHST) today, September 14: "The 24 hour pressure fall at Saipan airport was 7.5 millibars. Pressure falls are likely even larger at islands north of Saipan. This shows not only the continuing approach of Choi-Wan but also its continuing trend for intensification. It has been several years since a significant typhoon has struck the Marianas. Especially for Alamagan...beware of a sudden drop in winds. This may be the eye rather than the end of the storm. In this case winds will return just as suddenly from the opposite direction. Choi-wan will pass very close to Alamagan Tuesday afternoon."

Choi-Wan is the fifteenth tropical cyclone in the western Pacific Ocean this season. The sixteenth, Tropical Storm Koppu is poised to make landfall in China in the next day or two.

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Op maandag 28 september 2009 09:46 schreef Jumparound het volgende:
fuck fuck fuck, nog 2 weken en ik ga náár de Phillipijnen

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Tyfoon Ketsana op weg naar Vietnam

Tropische storm Ketsana, die afgelopen weekend voor grote overstromingen zorgde op de Filipijnen, is aangesterkt tot een tyfoon. Dinsdag zal de nog wat aansterkende storm de Vietnamese kust bereiken in de buurt van Hue.

Ketsana heeft inmiddels zeker 140 mensenlevens gekost op de Filipijnen. In de hoofdstad Manilla stond het water hier en daar zes meter hoog na de overvloedige regenval (er werd 455 mm in 24 uur afgetapt). Bijna een half miljoen mensen hebben hun huizen moeten verlaten.

Hoewel de Filipijnen wel gewend zijn aan tropische stormen, worden de overstromingen van afgelopen weekend beschreven als de ergste sinds 1967.

Ten oosten van de eilanden heeft zich inmiddels een nieuwe tropische depressie gevormd, die westwaarts trekt en misschien komend weekend voor nieuwe overlast kan zorgen.

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Vietnam evacueert 170 duizend kustbewoners

De Vietnamese autoriteiten hebben 170 duizend mensen geëvacueerd uit de centrale kustgebieden, die worden bedreigd door de tyfoon Ketsana.

Ketsana veroorzaakte eerder overstromingen in de Filipijnen, waar minstens 240 mensen om het leven kwamen.

Verwacht wordt dat de tyfoon dinsdagmiddag de Vietnamese kust bereikt. De storm werd voorafgegaan door zware regenbuien en harde rukwinden, waardoor op veel plaatsen de elektriciteit al is uitgevallen.

In verband met het noodweer heeft Vietnam Airlines alle vluchten naar de toeristenbestemmingen Danang en Hue geannuleerd.

De Vietnamese hulpdiensten zijn gemobiliseerd zodat eventueel noodzakelijke hulpverlening snel op gang kan komen.

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Op dinsdag 29 september 2009 12:01 schreef Jumparound het volgende:
ver weg ja, maar heeft ie dan niet meer tijd om aan kracht te winnen?

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On September 26, 2009, in a matter of hours, Tropical Storm Ketsana dropped a month’s worth of rain on the Philippine capital of Manila. Streets resembled rivers, covered by water that was chest high and still rising, according to news reports. Over the next few days, death tolls climbed from dozens to over 200, with more casualties expected and search and rescue efforts continued.

As of September 28, more than 100,000 people had taken refuge in evacuation centers, and more than 330,000 were believed to be affected.
The estimates, acquired by multiple satellites, are calibrated with rainfall measurements from the Tropical Rainfall Measuring Mission (TRMM) satellite in the Multi-satellite Precipitation Analysis. The highest rainfall amounts—more than 600 millimeters (23.6 inches)—appear in blue. The lightest amounts appear in pale green. Gray shading indicates island topography of the Philippines.

Rainfall occurs over the entire region shown in this image. The heaviest pocket of rain appears off the west coast of southern Luzon, over the South China Sea. A large expanse of heavy rain stretches from that locality across southern Luzon. An area of heavy rain also occurs immediately south of the capital city.
The flooding that struck the region in late September 2009 was the worst in more than 40 years. Officials declared a “state of calamity” in Manila and 25 provinces affected by the storm.

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Op woensdag 30 september 2009 08:07 schreef Jumparound het volgende:
TS Parma wordt nu voorspelt als een cat 3. typhoon... gister nog als een 1

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Op dinsdag 29 september 2009 20:19 schreef Co_OL het volgende:
Het is trouwens wel heel rustig in de golf van Mexico

Naar mijn weten een klein TS meer niet tot nu toe, zou het nog komen ?

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Op woensdag 30 september 2009 08:58 schreef Frutsel het volgende:

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Dat bedoel ik Tis zo onvoorspelbaar als wat
Taiwan en China zo te zien

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Op woensdag 30 september 2009 10:20 schreef Frutsel het volgende:

Inmiddels weer bijgesteld en Parma gaat wel de Filipijnen treffen

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Op woensdag 30 september 2009 10:23 schreef Jumparound het volgende:

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Hmm, waar zie je dit?

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Op woensdag 30 september 2009 10:47 schreef Jumparound het volgende:
ik weet dat jij mod bent hier Frutsel, maar zou je het niet in 1 topic houden?

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Op woensdag 30 september 2009 16:05 schreef Jumparound het volgende:
zag net dat melor ook goed in kracht begint toe te nemen...

_{goede beredenatie trouwens, ik snap het idee nu achter 2 topic}

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Quietest September in the Atlantic since 1997
Well, it's the end of September, and what is traditionally the busiest month in the Atlantic was unusually quiet. We had only two named storms this September, the first time since 1997 we've had less than three September named storms. There were only 6.75 days in September with a named storm, which ranks as the 4th fewest September named storm days since 1950 (only 1962, 1970, and 1994 had fewer). The Accumulated Cyclone Energy (ACE) index for September ranked as the 6th lowest since 1950. The quiet period is likely to continue for at least another week, as there are no threat areas in the Atlantic to discuss today, and none of the computer models are forecasting tropical storm formation over the next seven days. I'll post my first-half-of-October outlook for the Atlantic tomorrow.

Jeff Masters

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Strongest hurricane on record in the southeast tropical Atlantic, only third known major hurricane east of 35°W

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Op woensdag 30 september 2009 10:25 schreef Frutsel het volgende:

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