The air quality is generally acceptable for most individuals. Meanwhile, face masks will be required in one major U.S. city into 2021.AccuWeather Summer Camp: What makes a thunderstorm severe?Lightning has killed an average of 25 people each of the last 10 years in the U.S., but that’s not what makes a thunderstorm severe.New study shows best and worst face masks to guard against coronavirusA team of scientists analyzed more than a dozen of the most commonly-worn mask types and some of the masks, they concluded, are actually worse than wearing no mask at all.Road trip car essentials to keep everyone sane for the duration of the journeyMaybe you're hitting the road instead of the skies this summer. Get your 3-Day weather forecast for Sheffield, Sheffield, United Kingdom. © 2020 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved. Record-setting Tropical Storm Josephine to brush Leeward IslandsThe storm set yet another Atlantic record when it developed Thursday, and the system could pass close enough to bring impacts to the Leeward Islands and eventually Bermuda.Searing heat wave to swell across West, spark highest temps in 3 yearsA major hot spell will produce temperatures as high as 30 degrees above normal. Sheffield 7 day weather forecast including weather warnings, temperature, rain, wind, visibility, humidity and UV Get the Sheffield, Sheffield, United Kingdom local hourly forecast including temperature, RealFeel, and chance of precipitation. However, sensitive groups may experience minor to moderate symptoms from long-term exposure. And one city just over the Canadian border may challenge an all-time August high.Daily coronavirus briefing: New test could show results in secondsReceiving a diagnosis in seconds may be on the horizon with the help of a revolutionary COVID-19 test. 14-day weather forecast for Sheffield. Source: Met Office National Severe Weather WarningsYellow Warning for Thunderstorms in effect from Monday, 12:00 AM BST until Monday, 9:00 PM BST. Hi/Low, RealFeel, precip, radar, & everything you need to be ready for the day, commute, and weekend! Meanwhile, face masks will be required in one major U.S. city into 2021.AccuWeather Summer Camp: What makes a thunderstorm severe?Lightning has killed an average of 25 people each of the last 10 years in the U.S., but that’s not what makes a thunderstorm severe.New study shows best and worst face masks to guard against coronavirusA team of scientists analyzed more than a dozen of the most commonly-worn mask types and some of the masks, they concluded, are actually worse than wearing no mask at all.Road trip car essentials to keep everyone sane for the duration of the journeyMaybe you're hitting the road instead of the skies this summer. Here are 6 essential items you want to pick up before you set out.Get AccuWeather alerts as they happen with our browser notifications.Yellow Warning for Thunderstorms in effect from Sunday, 12:00 AM BST until Monday, 12:00 AM BST. Everything you need to be ready to step out prepared. © 2020 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved. There are eight different pollutants that we track that impact the cleanliness of the air and your health.Record-setting Tropical Storm Josephine to brush Leeward IslandsThe storm set yet another Atlantic record when it developed Thursday, and the system could pass close enough to bring impacts to the Leeward Islands and eventually Bermuda.Daily coronavirus briefing: New test could show results in secondsReceiving a diagnosis in seconds may be on the horizon with the help of a revolutionary COVID-19 test. Here are 6 essential items you want to pick up before you set out.Get AccuWeather alerts as they happen with our browser notifications.Yellow Warning for Thunderstorms in effect from Sunday, 12:00 AM BST until Monday, 12:00 AM BST. Outlook for Friday to Sunday. Get the Sheffield, PA local hourly forecast including temperature, RealFeel, and chance of precipitation. Everything you need to be ready to step out prepared. Source: Met Office National Severe Weather Warnings Source: Met Office National Severe Weather Warnings