Storm Barney Comes To Play

It is going to get very windy later today as a potent low-pressure system – dubbed Barney – comes to play at the party. Don’t be fooled by the friendly name, winds over land will be unusually gusty during the afternoon and evening rush, so our advice would be to not make any unnecessary trips.

Continue reading

Advertisements

Interesting Science Of How Snow Accumulates

IMG_0008
28 cm of lying snow in Tallaght on December 2nd, 2010. Image: Author

Snow is an extremely complicated form of precipitation, and as such leads to a very tricky time for a forecaster. A fraction of a degree either way can tip the balance between a proper snowflake and a more melted form, especially here in Ireland. There is a whole lot of physics going on there, much of which is still poorly understood, but let’s take a look at the stuff we do understand.

Continue reading

Storm Abigail and Ex-hurricane Kate To Set Stormy Scene

Over the past week or so we have fallen into a warm Atlantic conveyor-belt pattern of weather which has brought rain band after rain band but very mild temperatures. The reason is a persistent low south of Iceland and a persistent high over the continent, we being stuck in between. It’s about to crank up a notch or two, however, as two named storms enter the party. Step up Abigail and Kate.
Continue reading

Yet Another Tropical Cyclone Hits Yemen

UPDATE: 1200Z Sunday 8th November

Tropical Cyclone Megh intensified overnight and at 0900Z the JTWC had its intensity at 110 gusting 135 knots (204 gusting 250 kph). The eye has just passed over the northern part of the island of Socotra, as shown by the latest 1-km visible image (1130Z) and a 85 GHz microwave image at 1039Z. Earlier satellite-derived precipitation rates were around 1.2 inches (30 mm) per hour.

vis Continue reading

Live: Tropical Cyclone Chapala

Updated 2300UTC, Monday 2nd November, 2015

Storm surge starts to flood coastal areas of Socotra. Image from Emirates247

Tropical Cyclone 04A (Chapala), which rapidly became a strong tropical cyclone (hurricane) in the Arabian Sea a few days ago (see here), is now in the Gulf of Aden, south of Al Mukalla, Yemen. It has reduced to 90 knots from its highest 145 knots, and is starting weaken under the effects of increased windshear and the Yemeni terrain. It will make landfall as a minimal hurricane at about 0600Z Wednesday (0900 local time) and will bring life-threatening rainfall over a wide area.

Continue reading

Tropical Cyclone Chapala Intensifying And Heading For Arabian Peninsula

indian ocean irA tropical cyclone (or hurricane as we know it) has formed in the Arabian Sea and is heading west towards the Arabian peninsula. It looks set to hit somewhere around the border between Oman and Yemen on Monday as a strong Category 3 or 4 storm, with sustained winds of up to 115 knots (225 kph). This is liable to cause substantial damage and life-threatening floods to an area not accustomed to such severe weather.
Continue reading

Blast From The Past: Hurricane Debbie (1961)

Hurricane Debbie over the Atlantic on September 13th, 1961. Image from Wikiwand
Hurricane Debbie over the Atlantic on September 13th, 1961. Image from Wikiwand

Of all the Irish windstorms in living memory, Debbie in September 1961 set many records that still stand to this day. With a total death-toll of 78 (18 in Ireland and 60 in a plane crash in Cape Verde), it left a path of destruction in its wake. It has been claimed that this storm was the only true hurricane to survive as far north as Ireland, but this is not the case. Hurricanes, in the true sense of the word, simply cannot hold onto their tropical characteristics throughout the long trek this far north, and Debbie was no different. It is possible for us to get regular storms with hurricane-force winds, but they are a different beast altogether. So what was Debbie then?

Continue reading