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Get the Chapel Hill, NC local weather forecast by the hour and the next 10 days. ... Chapel Hill, NC Add / Edit. Clear. 38 ... 7:19AM Sunrise. 65% Humidity. 29.80 in Pressure--UV Index. 5:41PM ...
Heat index graph: Image title: Comparison of National Weather Service heat index values (circles) with the formula approximation in the Wikipedia article (curves), by CMG Lee. In the SVG file, hover over a graph to highlight it. Width: 100%: Height: 100%
Get the Chapel Hill, NC local weather forecast by the hour and the next 10 days. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways ...
The National Weather Service has issued a Hazardous Weather Outlook for central North Carolina. The hottest days are still ahead. How to stay safe.
A generalized view of the heat index showing how the perception of heat by the human body increases with temperature but more rapidly at higher humidity levels. The heat index of a given combination of temperature and humidity is defined as the dry-bulb temperature which would feel the same if the water vapor pressure were 1.6 kPa. Quoting ...
NOAA national weather service: heat index; Temperature. Relative humidity. 80 °F (27 °C) 82 °F (28 °C) 84 °F (29 °C) 86 °F (30 °C) 88 °F (31 °C)
That's the heat index. Here's how it works. The temperature on a summer day may be in the 80s or 90s. So why does it feel so much hotter? That's the heat index. Here's how it works.
An excessive heat warning is a notice issued by the National Weather Service of the United States within 12 hours of the heat index reaching one of two criteria levels. In most areas, a warning will be issued if there is a heat index of at least 105 °F (41 °C) for more than three hours per day for two consecutive days, or if the heat index is greater than 115 °F (46 °C) for any period of time.