Välismaa uudised

Himawari-8 data assimilated simulation enables 10-minute updates of rain and flood predictions

ScienceDaily - 17. Jaanuar 2018 - 19:55
Using the power of Japan's K computer, scientists have shown that incorporating satellite data at frequent intervals -- 10 minutes in the case of this study -- into weather prediction models can significantly improve the rainfall predictions of the models and allow more precise predictions of the rapid development of a typhoon.
Kategooriad: Välismaa uudised

Weather anomalies accelerate the melting of sea ice

ScienceDaily - 17. Jaanuar 2018 - 5:25
Researchers reveal why Arctic sea ice began to melt in the middle of winter two years ago -- and that the increased melting of ice in summer is linked to recurring periods of fair weather.
Kategooriad: Välismaa uudised

In sweet corn, workhorses win

ScienceDaily - 16. Jaanuar 2018 - 21:42
When deciding which sweet corn hybrids to plant, vegetable processors need to consider whether they want their contract growers using a workhorse or a racehorse. Is it better to choose a hybrid with exceptional yields under ideal growing conditions (i.e., the racehorse) or one that performs consistently well across ideal and less-than-ideal conditions (i.e., the workhorse)? New research suggests the workhorse is the winner in processing sweet corn.
Kategooriad: Välismaa uudised

Sanchi oil spill contamination could take three months to reach mainland

ScienceDaily - 13. Jaanuar 2018 - 16:37
Water contaminated by the oil currently leaking into the ocean from the Sanchi tanker collision is likely to take at least three months to reach land, and if it does the Korean coast is the most likely location. However, the oil’s fate is highly uncertain, as it may burn, evaporate, or mix into the surface ocean and contaminate the environment for an extended duration.
Kategooriad: Välismaa uudised

Torrential rainfall for central Greece today, flooding likely

Severe Weather Europe - 13. Jaanuar 2018 - 4:11
Major rainfall (and snowfall at higher elevations) is ongoing and expected over eastern parts of Central Greece and eastern parts of Thessaly this weekend, particularly on Saturday. Local flooding is likely. A weak, broad cutoff upper low is located in the central Mediterranean, moving eastwards. Ahead of it, southerly winds bring warm and moist airmass northward, producing convective and orographic rainfall over Greece. Strong rainfall (snowfall at higher elevations) is expected to continue over eastern and central parts of Central Greece and eastern Thessaly. Thunderstorms have been ongoing over the area during the night and are expected to continue through the day. High-resolution model guidance indicates up to 100 – 200 mm total rainfall by early Sunday morning. Expect local
Kategooriad: Välismaa uudised

Jet stream changes since 1960s linked to more extreme weather

ScienceDaily - 12. Jaanuar 2018 - 16:12
Increased fluctuations in the path of the North Atlantic jet stream since the 1960s coincide with more extreme weather events in Europe such as heat waves, wildfires and flooding. The new research is the first reconstruction of historical changes in the North Atlantic jet stream prior to the 20th century. By using tree rings, the researchers developed a historical look at the position of the North Atlantic jet back to 1725.
Kategooriad: Välismaa uudised

Urban insects are more resilient in extreme weather

ScienceDaily - 11. Jaanuar 2018 - 18:53
A new study will help researchers understand how to make predictions and conservation decisions about how organisms living in cities will respond to catastrophic weather events.
Kategooriad: Välismaa uudised

Why the Republican Party may have an advantage when it rains: Voters change their minds

ScienceDaily - 11. Jaanuar 2018 - 17:14
Bad weather affects US voter turnout and election outcomes with past research demonstrating that the Republican Party has the advantage. A new study finds that the Republican Party's advantage when it rains may be due in part to voters changing their partisan preference that day.
Kategooriad: Välismaa uudised

Another round of excessive snowfall for western Alps next week?

Severe Weather Europe - 11. Jaanuar 2018 - 11:36
The western Alps may well be in for another round of excessive snowfall next week. Latest GFS model guidance suggests a favourable pattern with a deep trough and likely a new cutoff low. Latest GFS model guidance suggests a large, deep trough pushing into Europe early next week – a pattern change that signals more unstable weather for the region. 500 mb height anomaly on Tuesday, showing the deep trough. GFS model guidance. Map: PivotalWeather. This is a favourable pattern for additional snowfall across the western and southern Alps. Indeed, current GFS model guidance indicates locally more than 100-150 cm of new snow. Snow depth change between this Sunday (January 14) and next Sunday (January 21). GFS model guidance. Map:
Kategooriad: Välismaa uudised

Western Alps buried in meters of fresh snow – the most amazing views

Severe Weather Europe - 11. Jaanuar 2018 - 3:47
The western Alps of northwestern Italy, southeastern France and extreme southern Switzerland received enormous amounts of fresh snow over the past few days. As expected, a persistent cutoff low over the western Mediterranean produced strong stau effect snowfall over the western Alps, with up to 2-3 m snowfall over two to three days! Check out the most impressive, spectacular views from the affected zones below: Extreme amounts of snow (2-3 m) in Cervinia, Aosta Valley, NW Italy (2000 m) today, Jan 9! Over 10 000 people are reported to be stranded due to extreme amounts of snow. Report: Maurizio Bedon / Meteo Triveneto – Segnalazione in tempo reale. pic.twitter.com/uq67gTY6LZ — severe-weather.EU (@severeweatherEU) 9 January 2018 More views of the enormous
Kategooriad: Välismaa uudised

Human-perceived temperature is rising faster than actual air temperature

ScienceDaily - 10. Jaanuar 2018 - 17:10
Researchers have found the apparent temperature (AP)increased faster than air temperature (AT) over land in the past few decades, especially in the low latitude areas, and the rise is expected to continue in the future.
Kategooriad: Välismaa uudised

Windy weather for N Spain and W France: cutoff low and windstorm over the Bay of Biscay today – Jan 10, 2017

Severe Weather Europe - 10. Jaanuar 2018 - 16:07
A new cyclone is approaching western Europe; it will cause gale to storm force winds across the Bay of Biscay and affect the northern coast of Spain and western coast of France over the next 24 hours. By early afternoon today, the low had already developed significantly, deepening to 1000 mb central pressure and deepening further, down to approximately 995 mb by the late afternoon. Latest high-resolution model guidance indicates the system will generate winds gusting up to 90-110 km/h. There is some marginal instability present, with up to 500-700 J/kg MLCAPE, so shallow convection is also expected; the main severe threat with these storms will be severe wind gusts, locally possibly up to 130 km/h. Most of the severe
Kategooriad: Välismaa uudised

Water-based, eco-friendly and energy-saving air-conditioner

ScienceDaily - 8. Jaanuar 2018 - 20:32
A team of researchers has pioneered a new water-based air-conditioning system that cools air to as low as 18 degrees Celsius without the use of energy-intensive compressors and environmentally harmful chemical refrigerants.
Kategooriad: Välismaa uudised

More intense snowfall for NW Italy tonight and tomorrow

Severe Weather Europe - 8. Jaanuar 2018 - 19:32
Intense snowfall in the Alps of northwestern Italy continues tonight and will persist for much of the day tomorrow. Locally over 1 m of snow has fallen in the past 24 hours, additional 1-1.5 m is indicated by various models by late tomorrow. Both convective and orographic (stau effect) snowfall are ongoing across the western Alps, particularly the extreme NW Italy, under the effects of the ongoing intense cold core upper low over the western Mediterranean. Various high-resolution models indicate 100 cm of additional snowfall by late tomorrow, with some areas receiving even up to twice as much. Total snowfall in the Alps by Tuesday late afternoon; locally up to 200 cm additional snow locally, up to 100 cm of
Kategooriad: Välismaa uudised

Snow sprinkles Saharan dunes in white

Severe Weather Europe - 8. Jaanuar 2018 - 16:19
Snow sprinkled the orange sand dunes of Ain El Safra, northwestern Algeria on Sunday, creating a rare and spectacular sight, more reminiscent of Mars than Earth. The snowfall was caused by the large cutoff upper low over western Mediterranean, which also influenced northern Algeria. The snow was visible also in satellite imagery, standing out in the orange desert surface. Report: Crt Sidali, حسام مسعودي, Gian Alonso, Rabah Ripou Ouchen, Issam Bouchetata Bouchetata, ⵯⴰⵍⵉⴷ ⵏⴻⵇⵇⵉⵛ, Amayas Mazigh. True color image by NASA Terra satellite, MODIS instrument on January 7, showing snow in the region.. False color image by NASA MODIS instrument: clouds (white, orange), water surfaces (black), vegetation (green) and bare soil (cyan-blue). The snowfall, while rare, has been observed several
Kategooriad: Välismaa uudised

Large amounts of Saharan dust pushed into central and northern Europe over the next few days – UPDATE

Severe Weather Europe - 8. Jaanuar 2018 - 15:06
Very large amounts of Saharan dust are being advected with southerly winds across the Mediterranean far into central and northern Europe over the next several days. The event is caused by the large and deep cutoff upper low that is affecting SW Europe at the moment. Warm airmass from northern Africa is being advected north by strong Scirocco winds. The dust will be making its way across the Mediterranean and central Europe as far north as Scandinavia. Significant amounts of Saharan dust are already present over western Europe, as the cutoff low has already been affecting the area for several days. A particularly impressive and dense plume of Saharan dust will be making its way across Tunisia and the Tyrrhenian
Kategooriad: Välismaa uudised

Pattern outlook for this week: cutoff low over W Mediterranean weakens, new cutoff low from the west, stable weather elsewhere

Severe Weather Europe - 8. Jaanuar 2018 - 14:06
A persistent rex block is ongoing over western Europe. As the cutoff upper low over the western Mediterranean slowly fills, a new push from the west produces a new cutoff low over western Europe by early in the second half of the week. Another round of cool, unsettled weather for western Europe and western and central Mediterranean. An impressive rex block has established over Europe, with a large cutoff upper low over the Iberian Peninsula and western Mediterranean. The cutoff low has caused severe thunderstorms and intense snowfall in Spain on Saturday and severe thunderstorms in southern France and snowfall in the Algerian desert on Sunday and is producing thunderstorms and torrential rainfall in southern France today as well as
Kategooriad: Välismaa uudised

Tornado and hailstorms in southern France – January 7, 2018

Severe Weather Europe - 8. Jaanuar 2018 - 11:41
Strong thunderstorms hit extreme southern France on Sunday morning, producing at least one tornado and large hail. The cutoff upper low that has been affecting western Europe for the past few days produced severe thunderstorms in extreme SSW of France on Sunday morning. The system had already produced tornadoes and hailstorms (as well as intense snowfall) in Spain. On Sunday morning an isolated supercell produced a tornado in St.-Jean-Pla-de-Corts, Pyrenees Orientales. Minor damage was reported. #Tornado in St.-Jean-Pla-de-Corts, Pyrenees Orientales, SW France this morning, January 7! Video: Jean-Pierre Grau / @MeteoContact pic.twitter.com/DpfMq9Q1Z8 — severe-weather.EU (@severeweatherEU) 7 January 2018 Tornado in St.-Jean-Pla-de-Corts, Pyrenees Orientales, SW France- Video: Jean-Pierre Grau / @MeteoContact Another view of the tornado in Saint-Jean-Pla-de-Corts, south France on
Kategooriad: Välismaa uudised

Thunderstorms ongoing over southern France: intense rainfall and local flooding likely

Severe Weather Europe - 8. Jaanuar 2018 - 10:20
The expected episode of intense rainfall over southern France has started. A persistent line of thunderstorms is ongoing between Marseille and Montpellier. Heavy rainfall is expected with these thunderstorms. Also, there is enhanced threat for marginally large to large hail and tornadoes. Lightning activity over southern France, mid-morning, Monday. Follow these storms on radar. Map: Blitzortung. High-resolution models indicate up to around 100 mm of rainfall locally by the late afternoon and early evening. Expect local flooding. Amount of fresh snow across the Alps by early Tuesday. ARPEGE model guidance. Map: Wxcharts.eu. Also, up to 500-800 J/kg MLCAPE is available, overlapping with quite impressive shear, up to 40-50 kt; the environment is certainly supportive of rotating updrafts within the line
Kategooriad: Välismaa uudised

Large amounts of Saharan dust to move into western and central Europe in the next few days

Severe Weather Europe - 7. Jaanuar 2018 - 12:34
Large amounts of Saharan dust will be advected with southerly winds across the Mediterranean into western and central Europe over the next several days. The large and deep cutoff upper low that is affecting SW Europe at the moment is causing strong advection of air from the south. Scirocco winds blow warm air from northern Africa, with large amounts of suspended Saharan dust far north. Latest model guidance indicates large amouts of Saharan dust being blown across the W Mediterranean, particularly between the Balearic Islands and Corsica and Sardinia, into France and westwards into the Bay of Biscay and onto the Iberian peninsula. By late on Monday, a major plume of Saharand dust moves across Italy and Corsica into Switzerland,
Kategooriad: Välismaa uudised

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