• Storm Forecast: Excessive precipitation, large hail, and tornadoes forecast for Spain

    Valid: Tue 21 Jan 2020 06:00 to Wed 22 Jan 2020 06:00 UTC
    Issued: Mon 20 Jan 2020 19:24
    Forecaster: DAFIS

    • A level 2 was issued for Spain for excessive precipitation, large hail, and tornadoes.

    photo:ESTOFEX;desc:Storm forecast; licence:cc;


    The record-breaking high-pressure system in NW Europe is weakening but the cut-off low that has formed over the Iberian Peninsula is still active. Embedded short-wave troughs in this cold drop will continue to create favorable conditions for severe weather in eastern Spain.

    Another cut-off low is found in the extreme East Mediterranean and an intensifying trough in Scandinavia is about to move SE, bringing cold air masses in eastern Europe later during the week.



    A strong easterly flow from the Mediterranean brings unstable air masses onshore, where apart from the large-scale lift, the local orographic lift will result in numerous storms in East Spain.

    Coastal areas and the Balearic Islands will experience a high threat of large hail given the steep mid-level lapse rates and a few hundreds of J/kg CAPE. DLS will range between 10-20 m/s and LLS will locally exceed 10 m/s with veering winds, increasing the threat of tornadogenesis.

    The soil is already saturated due to the torrential rainfall on Monday 20/01, so the heavy rainfall that is expected on Tuesday 21/01 within the level 1 and 2 areas, will deteriorate the conditions for flash floods and landslides.


    posted in Articles
  • Windy Handleiding: Hoe voegt u een webcam toe aan Windy

    Dit is een Nederlandse vertaling van het artikel "Windy Tutorial: How to add your webcam to Windy". Klik hier om het originele artikel in het Engels te lezen. Vertaald door @Bluesbirdy.

    photo:Windy.com;desc:De outdoor-webcam checken; licence:cc;

    Het checken van een outdoor-webcam is een noodzakelijk onderdeel van elk avontuur

    En wij, bij Windy, verplichten ons ertoe om een steeds betere service aan te bieden aan mensen zoals ik. Voor piloten, kiters, avonturiers, bergbeklimmers en iedereen die liever buiten is dan in een winkelcentrum.

    Maar niet alleen dat. Wij, bij Windy, geloven dat het checken van een outdoor-webcam voorafgaand aan uw avontuur, bv. voor uw vlucht met een klein vliegtuig, het veiligheidsniveau aanzienlijk kan verhogen. —Ivo

    Word lid van de Windy-community en maak uw webcam beschikbaar voor een wereldwijd publiek. U kunt uw webcam aanmelden door enkele eenvoudige vragen te beantwoorden via dit formulier (klik HIER).

    photo:Windy.com;desc:Webcams op Windy;licence:cc;

    Windy zal uw aanvraag beoordelen en zodra uw webcam is goedgekeurd, wordt u op de hoogte gesteld van een geslaagde aanmelding. Uw webcam zal live gaan.

    Als u overweegt een webcam te kopen of bezig bent een webcam te kopen, bekijk dan de lijst met ondersteunde hardware hieronder.

    Dingen waarmee u rekening moet houden voordat u de webcam aanmeldt bij Windy

    • Uw webcam-server moet onze externe IP-adressen op de witte lijst hebben staan, omdat we vaak problemen ondervinden met servers die onze IP-adressen standaard blokkeren
    • We zullen uw webcam testen dmv. het downloaden van data op een dagelijkse basis, daarom is het belangrijk om ons te voorzien van de juiste afbeeldings-URL
    • We slaan alleen afbeeldingen op die openbaar beschikbaar zijn op onze website via timelapse-diavoorstellingen
    • De webcam zelf kan verschillende weergaven hebben, maar wat er op het webcambeeld wordt getoond bepaalt welke categorie en titel er aan elke webcam wordt toegewezen

    [ Meld uw webcam aan ]

    De lijst met ondersteunde hardware

    Fabrikanten uit Duitsland, Oostenrijk, Zwitserland en Frankrijk

    Aanbevolen merken

    Streaming software en apps


    Volgende stap: Voeg uw webcam toe aan favorieten

    photo:Windy.com;Webcam favoriet maken;licence:cc;

    Onder de stream van de webcam kunt u deze favoriet maken, zodat deze snel toegankelijk is (bij de webcams op de belangrijke locaties).

    photo:Windy.com;Webcam in uw favorieten;licence:cc;

    posted in Articles
  • Time-lapse Video: Global Transport of Smoke from Australian Bushfires

    The local impacts of the Australian bushfires have been devastating to property and life in Australia while producing extreme air quality impacts throughout the region.

    As smoke from the massive fires has interacted with the global weather, the transport of smoke plumes around the global have accelerated through deep vertical transport into the upper troposphere and even the lowermost stratosphere, leading to long-range transport around the globe.

    The smoke from these bushfires will travel across the Southern Ocean completing a global circumnavigation back around to Australia and is particularly pronounced across the southern Pacific Ocean out to South America.


    posted in Articles
  • NASA/NOAA Report: 2019 was the second warmest year since modern recordkeeping began in 1880

    Earth’s long-term warming trend can be seen in this visualization of NASA’s global temperature record, which shows how the planet’s temperatures are changing over time, compared to a baseline average from 1951 to 1980. The record is shown as a running five-year average.

    According to independent analyses by NASA and the National Oceanic and Atmospheric Administration (NOAA), Earth's global surface temperatures in 2019 were the second warmest since modern recordkeeping began in 1880.

    Globally, 2019 temperatures were second only to those of 2016 and continued the planet's long-term warming trend: the past five years have been the warmest of the last 140 years.

    This past year, they were 1.8 degrees Fahrenheit (0.98 degrees Celsius) warmer than the 1951 to 1980 mean, according to scientists at NASA’s Goddard Institute for Space Studies (GISS) in New York.

    The decade that just ended is clearly the warmest decade on record,” said GISS Director Gavin Schmidt. “Every decade since the 1960s clearly has been warmer than the one before.

    Since the 1880s, the average global surface temperature has risen and the average temperature is now more than 2 degrees Fahrenheit (a bit more than 1 degree Celsius) above that of the late 19th century. For reference, the last Ice Age was about 10 degrees Fahrenheit colder than pre-industrial temperatures.

    photo:NASA GISS/Gavin Schmidt;desc:Yearly temperature anomalies from 1880 to 2019, with respect to the 1951-1980 mean

    This plot shows yearly temperature anomalies from 1880 to 2019, with respect to the 1951-1980 mean, as recorded by NASA, NOAA, the Berkeley Earth research group, the Met Office Hadley Centre (UK), and the Cowtan and Way analysis. Though there are minor variations from year to year, all five temperature records show peaks and valleys in sync with each other. All show rapid warming in the past few decades, and all show the past decade has been the warmest.

    Using climate models and statistical analysis of global temperature data, scientists have concluded that this increase mostly has been driven by increased emissions into the atmosphere of carbon dioxide and other greenhouse gases produced by human activities.

    We crossed over into more than 2 degrees Fahrenheit warming territory in 2015 and we are unlikely to go back. This shows that what’s happening is persistent, not a fluke due to some weather phenomenon: we know that the long-term trends are being driven by the increasing levels of greenhouse gases in the atmosphere,” Schmidt said.

    Because weather station locations and measurement practices change over time, the interpretation of specific year-to-year global mean temperature differences has some uncertainties. Taking this into account, NASA estimates that 2019’s global mean change is accurate to within 0.1 degrees Fahrenheit, with a 95% certainty level.

    Weather dynamics often affect regional temperatures, so not every region on Earth experienced similar amounts of warming. NOAA found the 2019 annual mean temperature for the contiguous 48 United States was the 34th warmest on record, giving it a “warmer than average” classification. The Arctic region has warmed slightly more than three times faster than the rest of the world since 1970.

    Rising temperatures in the atmosphere and ocean are contributing to the continued mass loss from Greenland and Antarctica and to increases in some extreme events, such as heat waves, wildfires, intense precipitation.

    NASA’s temperature analyses incorporate surface temperature measurements from more than 20,000 weather stations, ship- and buoy-based observations of sea surface temperatures, and temperature measurements from Antarctic research stations.

    These in situ measurements are analyzed using an algorithm that considers the varied spacing of temperature stations around the globe and urban heat island effects that could skew the conclusions. These calculations produce the global average temperature deviations from the baseline period of 1951 to 1980.

    NOAA scientists used much of the same raw temperature data, but with a different interpolation into the Earth’s polar and other data-poor regions. NOAA’s analysis found 2019 global temperatures were 1.7 degrees Fahrenheit (0.95 degrees Celsius) above the 20th century average.

    NASA’s full 2019 surface temperature data set and the complete methodology used for the temperature calculation and its uncertainties are available at data.giss.nasa.gov/gistemp

    GISS is a laboratory within the Earth Sciences Division of NASA’s Goddard Space Flight Center in Greenbelt, Maryland. The laboratory is affiliated with Columbia University’s Earth Institute and School of Engineering and Applied Science in New York.

    NASA uses the unique vantage point of space to better understand Earth as an interconnected system. The agency also uses airborne and ground-based measurements, and develops new ways to observe and study Earth with long-term data records and computer analysis tools to better see how our planet is changing. NASA shares this knowledge with the global community and works with institutions in the United States and around the world that contribute to understanding and protecting our home planet.

    For more information about NASA’s Earth science activities, visit www.nasa.gov/earth.

    The slides for the Jan. 15 news conference are available at NOAA/NCDC website (PDF).

    NOAA’s Global Report is available at www.ncdc.noaa.gov/sotc/global/201913

    Related report from Copernicus


    posted in Articles
  • RE: New windy plugin: Feature Tracker posted in Windy Plugins
  • Satellite Imagery: Tropical Storm Claudia Battling Wind Shear

    Tropical Storm Claudia is battling wind shear as it continues moving away from Western Australia and through the Southern Indian Ocean. NASA-NOAA’s Suomi NPP satellite provided forecasters with an image of the storm on January 13.

    photo:NASA Worldview, Earth Observing System Data and Information System (EOSDIS);desc:Suomi NPP image of Claudia

    NASA-NOAA’s Suomi NPP satellite provided forecasters with a visible image of Tropical Storm Claudia on Jan. 13 as it continued moving in a westerly direction in the Southern Indian Ocean.

    Visible imagery from NASA satellites help forecasters understand if a storm is organizing or weakening. The Visible Infrared Imaging Radiometer Suite (VIIRS) instrument aboard Suomi NPP provided a visible image of Claudia that showed the storm appeared elongated.

    The shape of a tropical cyclone provides forecasters with an idea of its organization and strength, and NASA-NOAA’s Suomi NPP satellite provided a visible image of the landfall of the storm to forecasters. The storm appeared elongated from west to east. The imagery shows that Claudia is under strong vertical wind shear from the northwest to southeast. The low-level center now appears to the east of the main convection (rising air that creates the thunderstorms that make up the tropical cyclone).

    In general, wind shear is a measure of how the speed and direction of winds change with altitude.

    Tropical cyclones are like rotating cylinders of winds. Each level needs to be stacked on top each other vertically in order for the storm to maintain strength or intensify. Wind shear occurs when winds at different levels of the atmosphere push against the rotating cylinder of winds, weakening the rotation by pushing it apart at different levels.

    At 7:43 a.m. EST (8:43 pm WST) on Monday, January 13, 2020 the Australian Government Bureau of Meteorology (ABM) noted that “Severe Tropical Cyclone Claudia (Category 3) was located latitude 17.3 degrees south and longitude 114.1 east, about 298 miles (480 km) northwest of Karratha and 320 miles (515 km) north of Exmouth. Claudia is moving west-southwest at 18 miles (29 kilometers) per hour. Maximum sustained winds were near 80 knots (92 mph/148 kph).”

    Claudia is expected to continue to track towards the west-southwest and remain over open waters, well north of the Pilbara.

    Tropical cyclones/hurricanes are the most powerful weather events on Earth. NASA’s expertise in space and scientific exploration contributes to essential services provided to the American people by other federal agencies, such as hurricane weather forecasting.

    Rob Gutro
    NASA’s Goddard Space Flight Center


    posted in Articles
  • RE: Sounding Plugin - for paraglider pilots

    @mhaberler Thanks for the feedback Michael.

    1. Making the plugin better on mobile is something I plan to work on. Only a few users know that you can load plugins on mobiles so it was not high priority.

    2. Could you elaborate more on favorites, why is your use case usage ? One thing I was thinking about is to display only the 5/10 favorite spots closest to the current location to save screen real estate. However I ended up having < 15 favorites and haven't found it to be inconvenient. There is probably room for improvement here - we only need to find a good way.

    3. What would be the use to see below ground ? AFAIR it seems like some models do not have sensible values below ground level.

    posted in Windy Plugins
  • The History of Weather Balloon

    While weather instruments to measure the upper atmosphere have changed over the decades, the use of balloons to carry them aloft continues today.

    Ever find a white box with a parachute and shreds of a balloon attached to it? The National Weather Service has been utilizing balloons for decades to the measure the upper atmosphere. Where it returns to Earth is up to Mother Nature.

    Depending on season, it may land a few miles away from its launch location, or a few hundred miles away. The equipment remains may not be discovered for weeks or months, especially if it lands in farm fields.

    photo:NOAA/NWS;desc:Early weather balloon

    The Weather Bureau began its upper atmosphere observations in 1894, utilizing kites tethered by piano wire. The downsides of this method were the limited distance kites could ascend (less than 2 miles), the inability to use them if the wind was too light or too strong, and potential for the kites to break away.

    While manned balloons had previously been used in Europe, this was also a dangerous method. The kites gave way to airplanes in the 1930s, which also had weather and height limits.

    photo:NOAA/NWS;desc:Balloon launches have changed little in several decades

    The concept of using balloons to launch weather equipment has not changed in several decades.

    Testing of unmanned balloons to carry the weather instruments began around 1906 at the Weather Bureau's Mount Weather facility in Virginia. The balloons, similar to the kites, were tethered, but were reaching heights over 20,000 feet. By 1909, work began in portions of the central U.S. in testing the use of free-rising balloons. Heights of 14-15 miles were reached near Indianapolis and Omaha.

    These balloons were tracked from the ground to determine winds aloft, but any other data was not available until the equipment was retrieved; this led to the development of radio-meteographs (or "radiosondes") that sent the data back to the launch site. Crude radiosondes were tested in the 1920's and saw widespread deployment in the 1930's.

    photo:NOAA/NWS;desc:Autolauncher in use in Fairbanks, AK, on April 19, 2018

    Several models of radiosondes have been used over the years, but the concept of using a balloon to carry the weather equipment has persisted to the present day. Twice a day, at 92 stations, the NWS launches these balloons.

    They are filled with hydrogen or helium, and once launched, the balloon will typically ascend to an altitude of at least 100,000 feet before rupturing. When released, the balloon is about 5 feet in diameter, but will expand to 20-25 feet in diameter before rupturing in the thin air. A parachute is usually attached to slow the equipment's descent back to the surface.

    While the number of employees involved in upper air launches has decreased over the years, launches still require someone to inflate and release the balloon. However, even this is changing. Recent efforts in Alaska have focused on testing automated launch systems.

    An "autolauncher" can release 24 balloons before needing to be restocked. The technology has been deployed to all 13 balloon launching stations across Alaska, where weather and staffing can make it difficult to conduct manual launches on schedule.

    For more information, check out the following links: A Brief History of Upper-Air Observations (NWS Headquarters), NOAA news release on the autolaunchers (May 2018). Also, you can watch a balloon launch on our YouTube channel.

    Chris Geelhart (chris.geelhart@noaa.gov)


    posted in Articles