{"query_echo":{"q":"","filters":{"analysis_type":["meteorological analysis"]},"warnings":[{"code":"facet_value_not_in_vocabulary","message":"Value 'meteorological analysis' for facet 'analysis_type' is not in the controlled vocabulary."}]},"total":{"value":3,"relation":"eq"},"page":1,"page_size":20,"self":"https://climateinsightsdirectory.org/api/v1/search?analysis_type=meteorological+analysis","stability":"beta","ai_marking":{"digital_source_type":{"uri":"http://cv.iptc.org/newscodes/digitalsourcetype/trainedAlgorithmicMedia","name":"Created using Generative AI"},"notice":"Summary and key insights are generated using artificial intelligence."},"results":[{"id":"climcent-000013","url":"https://climateinsightsdirectory.org/document/climcent-000013","title":"More Frequent Fire Weather","publisher":{"name":"Climate Central","organization":"climate-central"},"document_type":"research paper","language":"en","date_published":"2025-05-07","source_url":"https://www.climatecentral.org/climate-matters/more-frequent-fire-weather","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"The analysis reveals a significant increase in fire weather days across much of the contiguous U.S., with the western U.S. experiencing far more frequent fire weather than the east. While the western U.S. has seen strong increases, particularly in the Southwest during spring and summer, parts of the eastern U.S. have also seen impactful increases, especially in the Southeast and Northeast. The study emphasizes that while human activity causes 87% of wildfires, fire weather primes the landscape for these fires to ignite and spread.","ai_generated":true,"unit":"climcent-000013#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"The western U.S. experiences significantly more fire weather than the eastern U.S., averaging 31 fire weather days annually compared to 8 days in the east.","ai_generated":true,"unit":"climcent-000013#insight-1","date_modified":"2026-10-23"},{"text":"Since 1973, the western U.S. has seen a strong increase in annual fire weather days, with some areas in Southern California, New Mexico, Texas, and Arizona experiencing an increase of approximately two months per year. Some locations in California, Nevada, New Mexico, and Texas now see fire weather twice as often as in the early 1970s.","ai_generated":true,"unit":"climcent-000013#insight-2","date_modified":"2026-10-23"},{"text":"Seasonal increases in fire weather are most prominent during spring across much of the country. In the western U.S., the Southwest has seen the largest jumps in spring and summer, with parts of New Mexico, Arizona, and Colorado gaining about a month of fire weather in spring, and Southern California, Utah, and Arizona gaining about three weeks in summer.","ai_generated":true,"unit":"climcent-000013#insight-3","date_modified":"2026-10-23"},{"text":"In the eastern U.S., while many areas saw only a few additional days of fire weather since 1973, the Northeast and Southeast have experienced the greatest increases. Specifically, northern New Jersey and coastal New York have seen at least 10 additional days annually, and the northern Piedmont area in North Carolina has seen nearly two additional weeks.","ai_generated":true,"unit":"climcent-000013#insight-4","date_modified":"2026-10-23"},{"text":"Human activity was responsible for 87% of U.S. wildfires from 2001 to 2024, accounting for nearly half of all burned acres, though fire weather conditions (temperature, relative humidity, and wind) are what prime the landscape for these fires to spread.","ai_generated":true,"unit":"climcent-000013#insight-5","date_modified":"2026-10-23"}],"climate_tags":["wildfire","climate change","temperature"],"geography_discussed":["Nevada","New Mexico","Washington","Oregon","California","Texas","Arizona","North Dakota","South Dakota","Colorado","Utah","Rhode Island","Florida","Connecticut","Michigan","Wisconsin","Kentucky","Indiana","Maine","North Carolina","New Jersey","New York"],"frame_perspective":[],"analysis_type":["trend analysis","meteorological analysis"]},{"id":"climcent-000290","url":"https://climateinsightsdirectory.org/document/climcent-000290","title":"FIRE WEATHER","publisher":{"name":"Climate Central","organization":"climate-central"},"document_type":"briefing","language":"en","date_published":"2021-08-25","source_url":"https://assets.ctfassets.net/cxgxgstp8r5d/4FPon4YHSWtIeFmIv1tJtw/d3f61fa19c0886cc17f2d0ba59d496e4/Climate_Central_Fire_Weather_Analysis_2021.pdf","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"Climate Central's analysis of weather station data from 225 locations across 17 U.S. states reveals a significant increase in fire weather days since the 1970s, driven primarily by warming and decreasing relative humidity. The report highlights that interior regions have seen higher increases than coastal areas, with some parts of New Mexico experiencing two additional months of fire weather compared to nearly 50 years ago. Beyond increasing wildfire risk, these conditions have led utilities like PG&E to implement public safety power shutoffs (PSPSs) to prevent equipment-related ignitions, resulting in significant economic impacts and health risks. The document argues that while land management and localized grids can mitigate risk, long-term stabilization requires reducing carbon pollution to net zero by 2050.","ai_generated":true,"unit":"climcent-000290#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Analysis of data from 1973 to 2020 shows strong increases in both the total number and the percentage of annual fire weather days across the Western U.S., with some climate divisions in California, Oregon, Texas, and Washington experiencing these conditions more than twice as often as in the early 1970s.","ai_generated":true,"unit":"climcent-000290#insight-1","date_modified":"2026-10-23"},{"text":"New Mexico has seen some of the most significant increases in fire weather, with certain areas now experiencing two more months of such weather annually than they did nearly half a century ago.","ai_generated":true,"unit":"climcent-000290#insight-2","date_modified":"2026-10-23"},{"text":"The increase in fire weather days is more pronounced in interior regions than in coastal regions, as the higher humidity levels typical of coasts make it more difficult to reach the low relative humidity thresholds required for fire weather.","ai_generated":true,"unit":"climcent-000290#insight-3","date_modified":"2026-10-23"},{"text":"A small number of states in the northern plains, including North Dakota, South Dakota, Kansas, and Nebraska, saw a decline in fire weather frequency, which the report attributes to temporary cooling in springs and summers potentially influenced by natural variation and agricultural irrigation.","ai_generated":true,"unit":"climcent-000290#insight-4","date_modified":"2026-10-23"},{"text":"Warming nights have reduced overnight relative humidity, which has negatively impacted the ability of firefighters to gain control over wildfires.","ai_generated":true,"unit":"climcent-000290#insight-5","date_modified":"2026-10-23"},{"text":"To avoid equipment-related ignitions during fire weather, California utilities have implemented public safety power shutoffs (PSPSs); in 2019, these shutoffs left 12 million people in Northern California without power and had an estimated economic impact of $10 billion.","ai_generated":true,"unit":"climcent-000290#insight-6","date_modified":"2026-10-23"},{"text":"Beyond weather, other factors fueling modern wildfires include the buildup of fuels due to the loss of indigenous land management, the spread of invasive grasses, urbanization of forested areas, and beetle-caused tree mortality linked to rising temperatures.","ai_generated":true,"unit":"climcent-000290#insight-7","date_modified":"2026-10-23"}],"climate_tags":["wildfire","temperature","climate change","urbanization","renewable energy","carbon dioxide emissions","Net-zero emissions","fossil fuel"],"geography_discussed":["New Mexico","Texas","California","Oregon","Washington","North Dakota","South Dakota","Kansas","Nebraska","Northern California"],"frame_perspective":[],"analysis_type":["historical trend analysis","meteorological analysis"]},{"id":"wwatt-000117","url":"https://climateinsightsdirectory.org/document/wwatt-000117","title":"Rapid attribution analysis of the extraordinary heatwave on the Pacific Coast of the US and Canada June 2021","publisher":{"name":"World Weather Attribution","organization":"world-weather-attribution"},"document_type":"research paper","language":"en","date_published":"2021","source_url":"https://www.worldweatherattribution.org/wp-content/uploads/NW-US-extreme-heat-2021-scientific-report-WWA.pdf","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"The report concludes that the June 2021 Pacific Northwest heatwave was virtually impossible without human-caused climate change, estimating it as a 1-in-1000 year event in the current climate. The analysis indicates the event was approximately 2°C hotter than it would have been in a pre-industrial climate and would have been at least 150 times rarer without anthropogenic warming. Future projections suggest that in a world with 2°C of global warming, such an event would occur every 5 to 10 years and be another degree hotter. Meteorological drivers included an 'omega-block' high-pressure system and dry antecedent soil conditions, while natural variability modes like ENSO and PDO played little to no role.","ai_generated":true,"unit":"wwatt-000117#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"In the most realistic statistical analysis, the heatwave is estimated to be a 1-in-1000 year event in the current climate, though it was at least 150 times rarer before human-induced climate change.","ai_generated":true,"unit":"wwatt-000117#insight-1","date_modified":"2026-10-23"},{"text":"The heatwave was approximately 2°C hotter than it would have been at the start of the industrial revolution, when global mean temperatures were 1.2°C lower than in 2021.","ai_generated":true,"unit":"wwatt-000117#insight-2","date_modified":"2026-10-23"},{"text":"If global warming reaches 2°C, an event of this magnitude would occur roughly every 5 to 10 years and would be an additional 1°C hotter than the 2021 event.","ai_generated":true,"unit":"wwatt-000117#insight-3","date_modified":"2026-10-23"},{"text":"The event was characterized by an 'omega-block' high-pressure system with a 500 hPa geopotential height of approximately 5980 m, which was unprecedented for western North America between 1948 and June 2021.","ai_generated":true,"unit":"wwatt-000117#insight-4","date_modified":"2026-10-23"},{"text":"Anomalously dry antecedent conditions from March through June 2021, particularly in Western Oregon, likely amplified temperatures by reducing latent cooling from evapotranspiration.","ai_generated":true,"unit":"wwatt-000117#insight-5","date_modified":"2026-10-23"},{"text":"Natural variability modes, specifically the El Niño Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO), were found to have little to no influence on the heatwave.","ai_generated":true,"unit":"wwatt-000117#insight-6","date_modified":"2026-10-23"},{"text":"The heatwave caused significant human and infrastructure impacts, including several hundred extra deaths in Canada, power outages, and the destruction of the village of Lytton, where a record temperature of 49.6 °C was measured on June 29.","ai_generated":true,"unit":"wwatt-000117#insight-7","date_modified":"2026-10-23"}],"climate_tags":["extreme heat","heat wave","extreme event attribution","anthropogenic climate change","drought","climate change adaptation"],"geography_discussed":["Portland","Seattle","Vancouver","Lytton","Western Oregon","British Columbia"],"frame_perspective":[],"analysis_type":["attribution analysis","statistical modeling","meteorological analysis"]}]}