Winter 2017-18 season weather: yellow alert for wind and costeros extended to whole of Tenerife tomorrow

Winter 2017-18 season weather: yellow alert for wind and costeros extended to whole of Tenerife tomorrow

Graphic: Aemet.

Updated 11 December: The alert for high wind and costeros has now been extended to the whole of Tenerife for tomorrow. The seas will be rough. Please take very great care.

Updated 10 December: Aemet has now issued a yellow alert for Monday and Tuesday for wind and rain and costeros in north Tenerife. This is likely to be extended or expanded, but the significant factor will be that rough sea, with a swell forecast of up to 5m. Please see HERE for information about “costeros”, and the danger they can represent, and about staying safe in the sea here generally.

Updated 9 December: The recent calima may have surprised those who thought calimas always brought hot air because as often happens in winter, the winds bringing the dust have been really quite cold, especially at night. And it’s about to get colder as the next two transition days introduce a northerly front bringing cold air and rain, especially in the north. Temperatures will fall at all levels, forecasters predict, and the air will be damp even for those who don’t get any rain. At least the dry, dusty and pathogen-laden calima is history, for now!

Updated 3 December: Aemet’s Barcelona Dust Forecast says that a “significant Saharan dust event” is expecte in the Canaries from tomorrow afternoon. Yet another calima, it seems, is coming our way, where “PM10 could exceed 500 ug/m3”. Whatever that technical reading means, it sounds as though it could be a thick one.

Updated 25 November: After a quiet enough night in Tenerife, but during which El Hierro and especially La Palma suffered torrential downpours, dawn was a spectacular affair for us. Parts of Tenerife did have some rain through the night, and in terms of winds, Izaña recorded gusts of 103 km/h in the early hours, by far the strongest wind registered in the Canaries during this unsettled spell. The western islands apart from Tenerife remain on orange alert for rain and wind tomorrow, while Tenerife itself remains on yellow alert. It’s not over yet, though we have little enough to show for it … apart from the clouds, that is! The following was taken from Izaña early this morning.

Photo: Aemet at Izaña

 

Updated 11.30am: And Aemet itself has now put Tenerife on yellow alert for rain as well as wind. The Canarian Government’s alert is for Saturday and Aemet’s is for Sunday, so it’s fair to say that many parts of Tenerife have a high likelihood of seeing rain and some very blustery weather over the weekend.

Updated 24 November: Although Aemet still only has Tenerife on yellow alert for high winds, the Canarian Government’s Dirección General de Seguridad y Emergencias has issued an alert for rain in Tenerife on Saturday. This was forecast by Aemet, of course, along with rain on Sunday, though not sufficient in Tenerife to warrant a yellow alert. The Canarian Government’s alert is in place from midnight tonight, and concerns moderate to heavvy rain and stormy conditions, possibly severe in parts. Heaviest rain is expected in the west, south and east of Tenerife, as well as the metropolitan area. The alert also covers sustained winds of 35-50 km/h gusting to 70–100 km/h, possibly stronger, especially at altitude, where gusts in Las Cañadas could exceed 120 km/h.

Updated 23 November: Aemet has now issued a yellow alert for Tenerife this Saturday, forecasting winds gusting to 70km/h. The alert is not for rain, at least not at present, but that is expected over the weekend as well, with showers heavy in parts, and stormy conditions generally.

Updated 22 November: The picture for Tenerife seems to be becoming clearer, with Aemet issuing a statement advising of rain and wind from Friday due to the arrival of an Atlantic borrasca (area of low pressure/stormy weather) which will bring “very adverse” conditions of heavy rain and high winds, especially in the medianías and at altitude. According to Aemet’s forecast, Saturday especially will see very heavy and persistent rain, particularly in the south and west, with stormy conditions generally. The situation is expected to last throughout Sunday, and start to improve on Monday and Tuesday.

Updated 21 November: And what will probably be just the first of a few yellow alerts for rain has been issued by Aemet for tomorrow in La Palma. Tenerife is still having strong dry gusts of wind so many will be keeping their fingers crossed that this front coming in from the west will be able to reach us with a spell of some much needed rain.

Updated 19 November: Meteorologists say that minute by minute the situation is becoming clearer and that the Canaries could see what is perhaps the first of the winter storms from Wednesday. Aemet itself says that rain could be quite heavy in the south and west of the islands, despite the possibility of the front drawing some heat and dust in the air out of Africa on Monday and Tuesday, something that is not expected to affect us in Tenerife, though the eastern islands could experience some calima. Hopefully we will get some much needed rain, and of some significance!  The following animation comes from Efemérides Meteorológicas Canarias.

Updated 18 November: There hasn’t been much rain as yet, but what rain there was yesterday fell as snow on Teide. There wasn’t much of that either, and most of it was hail, but it was there, and although it’s cleared now it was still the first snow of winter!

Photo: Los Realejos Meteorología

Updated 17 November: Aemet says that an unsettled spell could see some very autumnal weather over the next week or so, with fronts forming to the west of the Canaries bringing showers from later today. Most rainfall over the next few days will be light, but away from the coast there could be some moderate to heavy downpours. Meteorologists say that they are watching the fronts with interest to see what develops in terms of what effect they could have on these islands, but are confident that none will produce a storm to affect us directly.

Updated 6 November: It certainly has dropped a few degrees over the past few days, and now it seems that we could be in for an unstable period thanks to a depression arriving tonight and bringing some heavy rain to parts of Tenerife. For the rest of Tenerife it should be cloudy, with the possibility of some light showers, but in the north in particular, the showers could be quite heavy. Meteorologists say that we should all find the north-east wind quite strong on occasions too. Hopefully it will be departing by the time the marathon is being run in Santa Cruz on Sunday, and it goes without saying that swimmers should be particularly careful because these are the conditions that make the sea colder and rougher than usual.

Original post 2 November: We’ve only just turned the corner into the winter season and already the first cold snap is approaching. Over the next few days we should see temperatures drop quite sharply, meteorologists say, because of a northern weather front which will bring clouds and showers. The rain should mainly be in the north east of Tenerife, and could be quite an intense downpour over in La Palma, but here the showers should be scattered and fairly light. Winter is coming …

4 Comments

  1. Happy to have info – and long to senester after all from Denmark with my dance passion 😊💃

  2. Author

    Thanks John

  3. Indeed John, The air quality standard for PM10, which is designed to protect public health with an adequate margin of safety, is 150 micrograms per cubic meter (µg/m3), averaged over 24 hours. Responsables are required to issue a public alert when PM10 levels reach 350 µg/m3 on a 24 hour average, public warning when PM10 levels reach 420 µg/m3 on a 24 hour average, and a declaration of public emergency at the level of 500 µg/m3. The significant harm level, at which serious and widespread health effects occur to the general population, is 600 µg/m3 of PM10.

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