#wetbulb — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #wetbulb, aggregated by home.social.
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Forget #HeatIndex. #WetBulb Globe Temperature Is Where It’s At.
"One of the most common terms we hear during the summer when discussing the weather is Heat Index. While the Heat Index can give you an idea of how dangerous the heat can be, there is another lesser known variable that may give a complete description, known as the #WetBulbGlobeTemperature.
"The Heat Index is a measure of how hot it feels to the human body, taking into account the temperature and the relative humidity. The higher either one value is, the higher the heat index and the greater the stress exerted on the body. Heat Index utilizes the temperature measured in the shade and therefore will likely be greater in the sun, where many activities take place. For temperatures taken in the full sunlight, Heat Indices can increase as much as 15°F. Humidity plays a major effect on cooling the body. If the humidity is high, sweat on the surface of the skin does not evaporate as quickly, slowing the cooling of the body. If the humidity is low, sweat evaporates too fast, leading to dehydration. [See link for Heat Index chart]
"Wet Bulb Globe Temperature (#WBGT) is similar to the Heat Index in that it is an indicator of the stress on the body from the heat. While it is not as well-known as the Heat Index, it’s not a new term. WBGT was developed in the 1950s after heat related illnesses affected the US armed services during the 1940s. After its implementation, there was a reduction in heat related illnesses during basic training. One fundamental difference between the Heat Index and WBGT is that the latter is calculated with the temperature measured in the sun. While Heat Index only takes temperature and Relative Humidity into account, WBGT takes several variables into account.
These variables include:
- Temperature
- Humidity
- Wind Speed
- Sun Angle
- Cloud Cover
- Physical Activity"Read more:
https://www.dtn.com/forget-heat-index-wet-bulb-globe-temperature-is-where-its-at/#WetBulbTemperatures #GlobalWarming #HighHumidity #ExtremeHumidity #Heatwaves
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#HeatIndex versus #WetBulb temperatures
The world needs a new way to talk about heat
by Michael J. Coren
July 25, 2023"[The heat index] warning system is not perfect. First, it assumes you’re resting in the shade, not working in the sun. If you’re exerting yourself outdoors, the effective heat index could be 15 degrees higher. Secondly, the heat index was built on the idea of a young and healthy adult — a bad assumption for the elderly, very young and sick."
Archived version:
https://archive.ph/rwMSE#ExtremeHeat #ExtremeHumidity #WetBulbTemperatures #ClimateChange #GlobalWarming
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#USWeather: Over 2,800 #HighTemperature records set during #HeatWave
A week-long heat wave set over 2,800 record high temperatures in towns across the nation, with some spots measuring their hottest June or all-time temperatures.
By Jesse Ferrell & Brian Lada
Published Jun 23, 2025"A total of 955 daily high temperature records and 1,899 daily high minimum (warm night) records were tied or broken during the last week's heat wave.
"Records dating back to the 1800s were shattered as an early-summer heat wave roasted large areas of the central and eastern United States. AccuWeather RealFeel® Temperatures blew past the 100-degree mark, air conditioners were on full blast, and cities opened cooling centers to help people cope with the intense heat.
" 'This is an incredibly hot and steamy heat wave for the month of June,' AccuWeather Chief On-Air Meteorologist Bernie Rayno said.
Tuesday's heat breaks 137-year-old record
"The heat wave peaked on Tuesday, and it wasn't just the hottest day of 2025, but the hottest weather many residents in the Northeast have experienced in over a decade.
"The mercury soared to 102 degrees in Boston on Tuesday afternoon, making it the hottest day in the city since July 22, 2011, when it reached 103. Philadelphia also notched its first 100-degree day since July 18, 2012.
"In New York City, the temperature fell just shy of hitting triple digits, but the high of 99 degrees was still enough to beat the previous daily record for the date, surpassing the high of 96 degrees set on June 24, 1888. Some areas not far from Central Park, where the official weather observations for the city are taken, did manage to hit 100 degrees, including Newark (103) and John F. Kennedy International Airport (102).
"Other cities across the region that reached 100 F on Tuesday afternoon include Hartford, Connecticut; Providence, Rhode Island; Wilmington and Dover, Delaware; and Manchester, New Hampshire.
"Monthly and hourly records were also set
"Illustrating how unusual and early the heat wave was, a thermometer in #AugustaME, recorded 100 degrees, tying their all-time record high set on Aug. 5, 1955. It joined 13 other stations where the temperature had never been recorded hotter.
"Many cities had never been as hot in June as they were Tuesday. Stations reporting their hottest June temperatures on record include #NewarkNJ, at 103 (tied); #NewYorkCity (Kennedy & LaGuardia at 102 and 101, a tie); Islip, New York at 101; Portland and #BangorME, at 99 and 98, a tie; and Mount Pocono, Pennsylvania, at 93, recorded on Monday. A total of 90 stations set June records.
"The heat came early in the day, with #Philadelphia setting or tying new hourly record highs for 9 a.m., 7 a.m., and 5 a.m., and New York City (JFK Airport) notching new or tied extreme highs at 3 a.m., 8 a.m., 1 p.m., 4 p.m., and 5 p.m, according to the Iowa Environmental Mesonet. For June, Philadelphia's hourly temperatures had never been higher for all but two hours of the day.
Monday's records
"The first full week of astronomical summer wasted no time warming up, with many thermometers across the region reaching levels they haven't hit in years.
"#Baltimore's Inner Harbor was one of the hottest spots on Monday, with a high of 104 F. The high humidity and strong summer sun made it dangerously hot outside, with the AccuWeather RealFeel® Temperature topping out at 113 degrees. To put this heat into perspective, 113 degrees is the historical average high temperature in Death Valley in mid-June.
"#NewarkNJ, reached 101 degrees, breaking its daily record of 99, and #RaleighNC, tied its daily record of 100, set last year.
"Although other weather stations broke records, they were all below 100 degrees. Most notably, the temperature at Mount Pocono, Pennsylvania, rose to 93 degrees, breaking the daily record and setting June's highest reading. This was the first 90-degree day at Mount Pocono since 2013.
Sunday's records"On Sunday, three weather stations broke the high temperature records for the date. Alpena, Michigan, hit 97 degrees Fahrenheit, breaking the previous record of 93 set in 1975. In #ValleyNE, the mercury pushed up to 94 degrees, breaking the old record of 91 from 2023. And in #MarquetteMI, the old record of 90 degrees, on this date in 1995, was smashed by a reading of 93.
"But it wasn't just daily record highs. Records for warm nights were also broken at breakneck speed. Saturday night tied the all-time high minimum historical record for Green Bay, Wisconsin, at 79 degrees, previously achieved in July 4, 1897, and July 30, 1916. Wausau, Wisconsin, didn't cool below 78 degrees, which had previously happened only on July 4, 1999. The fact that these records were previously recorded in July is an indicator of how early this severe heat wave is.
"Record warm nights for June were also set at La Crosse, Wisconsin, (80 degrees) and Mason City, Iowa, (77 degrees) Saturday night.
"A total of 255 record warm nights for June were recorded over the last week, with 59 of those new records the warmest nights ever recorded at the stations."
#ClimateDiary #ClimateDiaryUS #ClimateDiaryMaine #RecordBreakingHeat #ExtremeHeat #Humidity #ExtremeTemperatures #Wetbulb #GlobalWarming #GlobalBoiling
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As Indian Summer Breaks Temperature Records, Birds Feel The Heat
Rescue organisations like PETA India, Wildlife SOS and Wildlife Rescue received more calls of birds with sunstroke and dehydration symptoms this summer
ByTanvi Deshpande,Jahnavi Thotakuru|
4 Aug, 2024"The impact of #ExtremeHeat has been seen and felt on the ground for a long time now.
"#WildlifeSOS, a non-profit organisation working in #wildlife rescue and rehabilitation in India, reported an increased number of calls about birds affected by extreme heat this summer. In June 2024, the organisation received 35-40 rescue calls daily in Delhi-National Capital Region, higher than in April and May. Until June, the organisation had rescued over 220 birds suffering from heat, including species such as #BlackKites, #sparrows, #BlueRockPigeons, #BarnOwls, and #Peacocks.
“'The recent heat waves have had severe impacts on the avian population in India,' said Kartick Satyanarayan, co-founder and CEO, Wildlife SOS. 'Prolonged exposure to high temperatures can lead to dehydration, as birds struggle to find adequate water, impairing their bodily functions and potentially leading to severe health issues or even death. Heat stroke is a significant risk, with symptoms such as laboured breathing, drooling, lethargy and hyperthermia, which can cause organ failure and be fatal if not treated promptly.'
"On receiving a call about a bird in distress, most organisations guide the caller on immediate steps to be taken to stabilise the bird. Based on the bird’s situation, an ambulance might be sent and the bird moved to a facility.
“'We ask the caller to secure the bird, to take it to a place where there is shade and away from predators like cats, dogs or other birds because the bird is already in a comatose state,' said Bandhanpreet Kaur, manager of veterinary services at PETA India. 'Then we ask them to either pour cold water over its body or wrap the bird in a cold towel/any moist cloth…to reduce their body temperature immediately. And if electrolyte is available, we ask them to use a syringe or damp cloth to put a few drops in the bird’s mouth.'
"PETA India handled 90 cases of birds affected by extreme heat this year."
#India #Biodiversity #ClimateChange #ClimateCrisis #GlobalWarming #ExtremeHeat #HeatWaves #Wetbulb #Environment #Extinction #Wildlife