Skip to main content

Tail end of a cold front

Manila, Philippines - Busy areas of the city went underwater because of a steady rain due to a cold front. One of the worst hit are roads leading to the airport. I wonder how people who need to catch a flight managed. In Meteorology 101 we define a cold front as " the transition zone where a cold air mass is replacing a warmer air mass." Cooler air that wedges below the warm air mass causes that air to rise. This causes precipitation as the front passes.

The precipitation is usually not as bad as a monsoon (which is guaranteed to sink Manila) but it seems that even a light steady rain is now able to sink the city under water! This should give our city authorities some pause for thought.

In temperate climes the passage of a front is dramatic. The rains come and after a few hours when the front has passed the temperature can drop as much as 10 degrees celsius and bright sunny weather follows. Cold fronts are major rainmakers in these climates. Their effects can be dramatic in autumn or winter.

Since PAGASA does not have Doppler Radar it can't advise the public about how much rain is expected with these weather features. Until it can acquire one we will have to second guess by looking at the sky.

Comments

Popular posts from this blog

Simoun's lamp has been lit, finally.. not by one but by the many!

"So often have we been haunted by the spectre of subversion which, with some fostering, has come to be a positive and real being, whose very name steals our serenity and makes us commit the greatest blunders... If before the reality, instead of changing the fear of one is increased, and the confusion of the other is exacerbated, then they must be left in the hands of time..." Dr Jose Rizal "To the Filipino People and their Government" Jose Rizal dominates the Luneta, which is sacred to the Philippine nation as a place of martyrdom. And many perhaps all of those executed in the Luneta, with the exception of the three Filipino secular priests martyred in 1872, have read Rizal's  El Filibusterismo . Dr Rizal's second novel is a darker and more sinister one that its prequel but has much significance across the century and more after it was published for it preaches the need for revolution with caveats,  which are when the time is right and who will in...

Kung bakit dapat maging wikang pambansa din ang Ingles

Isang kakatwang eksena ang nasaksihan ko sa isang pribabdong opisina kamakailan lang. Dalawang empleyado ang inatasang bigyan ng solusyon ang isang isyu tungkol sa logistics. Ang isa ang tubong Davao at ang isa ay taga Iloilo. Ang unang wika nila ay Cebuano (Bisaya) at Hiligaynon (Ilonggo). Ang dalawang wika ay halos pareho ngunit may mga katagang iba ang kahulugan sa isa't isang wika. Ginamit nila ang wika nilang kinalakihan at hindi sila nagkaintindihan. Ang nangyari tuloy ay gumamit na lang sila ng wikang Ingles! Yung na nga rin ang sabi ko. Mag-English na lang kaya kayo! At bakit di wikang Filipino ang ginamit nila? Sa totoo lang, marami pa rin ang hindi bihasa sa Filipino upang gamitin ito sa mga larangan tulad ng logistics. At hindi lamang sa mga larangang teknikal, sa mga biyahe ko sa ibat-ibat lugar sa Pilipinas, ang mga naka-paskel sa mga CR o palikuran tungkol sa pagtitipid ng tubig ay naka sulat sa 1)Wika ng rehiyon 2) Wikang Ingles 3) at minsa'y sa wikang Filipino S...

Marikina River and the "janitor" fish

My newest environmental science research project is to determine the evolutionary biology of invasion by the "janitor fish" in Marikina River. Today we made our first survey and collections. Marikina River is the"greenest"in Metro Manila but that is just on the surface. One master's student is doing her thesis on biotic integrity and a volunteer MD is working on the project too. The "janitor fish (Pterygoplichthys sp) is the dominant fish now in the river,displacing traditional Marikina food fishes such as dalag and hito. The fish are collected and left to rot on the riverbanks. Despite this, there is still some subsistence fishing on the river. The highest densities of the fish are observed near sewage outfalls where they find food to eat. It is likely that the fish can be controlled if we can clean up the river! BTW the name "janitor fish" insults janitors. The fish thrive in dirty rivers and don't clean them up. Janitors on the other hand, ...