Kutentha Index Calculator
"Kuchita" kutentha kwa kutentha ndi kuwala, pogwiritsa ntchito NWS Rothfuss formula.
Zithunzizi zimasintha monga momwe mumalemba.
Zachidule
The heat index, or apparent temperature, is how hot it really feels when humidity is combined with the air temperature, and this heat index calculator computes it from those two inputs. The body cools itself by evaporating sweat, but humid air is already close to saturated so sweat evaporates slowly, the cooling falters, and it feels hotter than the thermometer says. The tool uses the U.S. National Weather Service Rothfusz regression, a multi-term fit of temperature and relative humidity, together with its standard low- and high-humidity corrections.
As a worked example, 90 °F air at 60% relative humidity carries a heat index of about 100 °F — ten degrees hotter than the reading — and pushing the humidity to 80% drives it past 110 °F. The calculator returns the feels-like temperature, how much hotter that is than the air, and a humidity table so you can see how quickly the danger rises as the air grows muggier at a fixed temperature.
The regression is most accurate around 80 °F (27 °C) and above with meaningful humidity; below about 80 °F it reports no heat stress because humidity has little effect on comfort in cool air. It also grades the reading into the NWS danger bands — caution, extreme caution, danger and extreme danger — so a heat index above 103 °F signals a real risk of heat cramps or exhaustion, and above 125 °F a high risk of heat stroke, which is vital for planning outdoor work, sport and travel in hot weather.
Mafunso ofunsidwa nthawi zambiri
Kodi ndi chiyani index ya kutentha?
Kutentha kwa index, kapena kutentha kowoneka bwino, ndi momwe zimawoneka ngati kutentha kwambiri pamene kuwala kwa relativity kumaphatikizidwa ndi kutentha kwa mpweya. Kuwala kwakukulu kumathamanga kutulutsa mpweya, chifukwa chake thupi limatulutsa kutentha mosatheka ndipo limawoneka ngati lotentha kuposa momwe thermometer imawerengera.
Kodi formula amagwiritsa ntchito izi?
Kubwerera m'mbuyo kwa NWS Rothfuss: HI = −42.379 + 2.04901523T + 10.14333127R − 0.22475541TR − … (ndi T mu °F ndi R mu %), kuphatikizapo kusinthidwa kwa madzi otentha kwambiri kapena otentha kwambiri. Ndi yoyenera kwambiri pa 80 °F ndi kutentha kwambiri.
Kodi zikutanthauza chiyani machitidwe a ngozi?
Kutalika: 80-90 ° F ndi kusamala, 90-103 ° F kusamala kwambiri, 103-124 ° F nkhawa (kutentha kapena kupweteka koyenera) ndi 125 ° F kapena kupitilira apo nkhawa yosatheka ndi nkhawa yochuluka ya kutentha.
N’chifukwa chiyani mpweya wouma umachititsa kuti kutentha kukhale koipa?
M'nyengo yozizira, pamene mpweya umakhala wouma, kusefukira kwa madzi kumachepa, moti thupi limatulutsa kutentha mosakwanira ndipo kutentha kwa 90 °F kumawoneka kotentha kwambiri pa 80% ya mpweya wozizira kuposa pa 30%.
N’chifukwa chiyani calculator ikunena kuti “sikuti pali kutentha” pa tsiku lotentha?
Kutentha index ndi kufotokozedwa kokha kwa zosowa zotentha - pafupifupi 80 ° F (27 ° C) ndi pamwamba. pansi pa kuti, kuwala kowala sichisintha momwe mpweya umawoneka, kotero chida chikudziwitsa kutentha kwa mpweya woyera kuposa wooneka.
Kodi ndi chiyani chinyezi index zosiyana ndi chinyezi cha mpweya?
They are opposite corrections: heat index adds apparent warmth from humidity in hot weather, while wind chill subtracts apparent warmth from wind in cold weather. Heat index needs temperature and humidity; wind chill needs temperature and wind speed.
Kodi index ya kutentha imatenga thunzi kapena dzuwa?
Kuwala kwa dzuwa kokhaku kungawonjezere mpaka 15 °F ku kutentha komwe kumaoneka, choncho mfundo yoti kutentha kuli ngati kuli kunja kwa dzuwa ndi kochuluka kuposa mfundo imeneyi yomwe imakhala yochokera pa calculator.
API — kugwiritsa ntchito izi calculator kuchokera code
Kuti mudziwe zambiri, pitani ku www.json.org/json.html. Kuti mudziwe zambiri, pitani ku www.json.org/json.html. Chomweko chilichonse chimene mumasiya chimagwiritsa ntchito mfundo yoyamba yomweyi yomwe tsambali limagwiritsa ntchito; mfundo yosadziwika ndi 400, siyiyenera kukhala zero yosadziwika. Onani zonse API docs →
Chithunzi
GET https://calculator.free/api/v1/heat-index/curl
curl "https://calculator.free/api/v1/heat-index/?units=imperial&temp=90&humidity=60"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/heat-index/?" + new URLSearchParams({
"units": "imperial",
"temp": "90",
"humidity": "60"
}));
const data = await r.json();
console.log(data.results);Zimenezi ndi zowerengera zokhudzana ndi malangizo amtundu uliwonse, si zokhudzana ndi ndalama, zamoyo kapena zokhudzana ndi ndalama.