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Sunburn effect (as measured by the UV index) is the product of the sunlight power spectrum (radiation intensity) and the erythemal action spectrum (skin sensitivity) across the range of UV wavelengths. [9] [10] The UV index is a number linearly related to the intensity of sunburn-producing UV radiation at a given point on the Earth's surface.
Map of regions covered by the 122 Weather Forecast Offices. The National Weather Service operates 122 weather forecast offices. [1] [2] Each weather forecast office (WFO or NWSFO) has a geographic area of responsibility, also known as a county warning area, for issuing local public, marine, aviation, fire, and hydrology forecasts.
Highest heat index: In the observation above at Dhahran, Saudi Arabia, the heat index ("feels like" temperature) was 81.1 °C (178.0 °F). [ 200 ] Highest temperature with 100% relative humidity : A temperature of 34 °C (93 °F) with 100% relative humidity in Jask , Iran , on 21 July 2012.
The average annual precipitation in New Jersey ranges from 40 inches along the southeastern coast to around 51 inches in the north-central part of the state. The driest season is usually autumn which has an average of 8 days per month with measurable precipitation. During other seasons the average month has between 9 and 12 days of precipitation.
The NOAA Weather Wire Service (NWWS) is a satellite data collection and dissemination system operated by the National Weather Service, which was established in October 2000. Its purpose is to provide state and federal government, commercial users, media and private citizens with timely delivery of meteorological, hydrological, climatological ...
August is the wettest month (0.93 in (24 mm)), while June is the driest (0.02 in (0.51 mm)). On September 8, 2014, the city of Phoenix recorded its single highest rainfall total by the National Weather Service with 3.30 in (84 mm), breaking the 75-year-old record of 2.91 in (74 mm), set on September 4, 1939. [ 19 ]
Autumn weather in North Dakota is largely the reverse of spring weather. The jet stream, which tends to weaken in summer, begins to re-strengthen, leading to a quicker changing of weather patterns and an increased variability of temperatures. By late October and November these storm systems become strong enough to form major winter storms.
The sunrise varies from 5:30 a.m. in summer and 7:00 a.m. in winter. Sunset varies between 5:40 p.m. in winter and 7:10 p.m. in summer. Puerto Rico does not use daylight saving time. The ultraviolet index or UV index varies from 10+ in the summer and a maximum of 7 in winter.