Catanduanes Forum

hPa

One of the most important training i had by the Geneva based IFRC (International Federation of the Red Cross and Red Crescent) when I was the administrator of PNRC, Catanduanes Chapter, was in Singapore. In that training, we focused on Disasters. Weather is one of them: typhoons/hurricanes, tsunami caused by typhoons...

Pa is a measurement of force/preasure. The Pa is named after Pascal, the famous French Physicist who studied pressure, stress and internal pressure. You find this in tire gauge (Pa). 1 hectoPascal (hPa)= 100Pa and 1 kiloPascal (kPa)=1000. Normal atmospheric pressure = 1013.25hPa.

This pressure applied evenly makes the sea where it is, at 0 level. When the hPa is high at a given sea area, say 1113.25hPa, the sea level reading may register -1 or lower (as if the sea is pushed downward by the pressure).

Juan's hPa before it hit land was 890hPa. As the center of the typhoon registers a low hPa, the sea level surge upwards making the sea rise. This pressure anomaly in the eye of the typhoon creates the "typhoon surge" that makes waves to be more elevated than when the hPa is normal (1013.25 hPa). The lower the hPa of typhoons, the higher the typhoon surge, the more dangerous it is for people living in low-lying areas near the sea.

So next time we watch a typhoon, it is important for us to watch the hPa as it predicts the typhoon surge normally associated with typhoons. This way we can advice people leaving along the coast to evacuate if the reading gets too low.

Lattitude/Longitude

Lattitude is that imaginary parallel concentric lines on the earth (in maps) starting from the equator (0°) up to the north pole (90°) or down to the south pole (-90°). On the other hand, Longitude is the imaginary angular lines running from north pole to the south pole. Well, maybe someone (MU maybe, he he he) can look up who designated our prime meridian (0°) to be in Greenwich. I was wondering why it was not Catanduanes!

Lattitudinal and longitudinal lines are important in navigating from one point to another, or in finding locations of places around the world.

For instance, Catanduanes is found between 13.3° N (latitude, meaning north of equator) to 14.1° N (latitude) degrees north latitude where 13.3° (latitude) is the tip of Tagungtong and 14.1(latitude) the tip of Pandan.

On the other hand Catanduanes is also found between 124.1° E (longitude, meaning east of prime meridian) to 124.3° E (longitude). I could imagine the western most tip found in the western Calolbon will read 124.1° E (longitude) and the Nagngangang Buaya (na baging kaaating picture ni MU), the easternmost tip will read 124.3° E (longitude).

Baras for example reads 13.7° N, 124.3° E or there abouts. It means, Baras is found 13.7° N of equator and 124.3° E of the prime meridian. (kina'niyang igahabayan ako dito nin leccion uy! whew!)

Rain Volume of Typhoons

Up till the invention of the doppler radar, the volume of rain could be estimated after the typhoon has passed using the rain gauge. Now that is not pro-active.

Today, MU is right, doppler images register red as having the most volume of rain. It takes a trained man however to read it as there is no known volume equivalent to the red hue registered by the doppler! So this is yet beyond me. The rule of thumb,however is, the more red you see on the typhoon map by doppler radar, the more rain!

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That done, i have to do my biology lesson!
Ibingan kang Baraka ka, banwiton taka ka ihawa iso yo na nuraan mo dian! Buda taka padunganan nin gin, iso yo nakuha mo dian!

Tagay!

ang high pressure area (HPA) sarong abnormal weather condition na kabaligtaran kan low pressure area. ini kadaklan nangyayari sa taas asin babang parte kan kinaban na kawsa kan malipot na panahon. dahil sa lipot na dara kaini, minaiwas ang bagyo sa direksyon na igwa kaini. HPA: taragbuan nin hangin kawsa kan paglipot kumpara sa kapalibutan kaini; mientras ang LPA: taragbuan nin hangin kawsa kan pag-init kumpara sa palibot kaini.

coordinates kan isla (estimates):
virac: 13.5'North (latitude), 124.2' East (longitude)
pandan: 14.0'North, 124.2'East

base sa Doppler Radar, nahihiling kun dakula ang darang uran ning sarong bagyo, ang uranon iyo ang parteng kolor pula sa pinapahiling na sattelite images kung nagkakaigwa nin forecasting ang PAG-ASA. usually ang mga super-typhoon kulang ang darang uran kung ikukumpara sa medyo maluluya sanang bagyo na mas nakakaipon nin dakul na uranon.

kung mainit ang panahon sa kinamumugtakan mo tapos nasa south-east portion ang bagyong harani sa lugar mo... mamako na tabi ning mga harong nindo ta delikadong tamaan ang saindong lugar...

ang impormasyon po na ini istorya man sana sakuya kang lolo ko kaya mas magayon kung makahapot man siyempre sa mga eksperto sa mga bagay na ini...