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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 ...
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.
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%
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 ...
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.
A heat index of 103 or greater is considered dangerous, based on the National Weather Service heat index chart. The peak heat index forecast for the Rochester area will be 103 degrees on Wednesday.
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)