The scale for measuring these geomagnetic storms is called "the G scale," ranging from a minor storm at G1 to an extreme storm at G5. "As this particular coronal hole rotated back into view – meaning we could see and analyze it – it was clear that it had diminished and we adjusted our forecast accordingly," Brasher told CBS News via email. EST.īryan Brasher, a project manager at NOAA's Space Weather Prediction Center told CBS News one coronal hole in particular had previously shown elevated activity, so forecasters expected it to do so again. NOAA has an interactive map that shows where above Earth the northern lights are positioned. Solar wind from coronal holes in the sun flow towards Earth and have a magnetic reaction that causes the northern lights, also called the aurora borealis, according to NASA. NOAA also initially predicted high activity for this week and then downgraded their forecast. This means that the high levels of activity previously expected are now considered much less likely." "However, now that the forecast activity is less than three days in the future, we can see that the solar features that produced the prior activity have actually diminished over the last month. "The features on the sun that produce activity like this typically last 1-3 months, so the active conditions were predicted to occur again this week," a representative for the institute told CBS News via email. University of Alaska's Geophysical Institute A map from University of Alaska's Geophysical Institute shows were above the Earth the northern lights will be on July 13. The institute told CBS News it originally predicted a moderate solar storm – which causes the dazzling phenomenon. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.Last week, the institute projected the display would be visible in 17 states over those two days: Washington, Iowa, Illinois, Ohio and Massachusetts on July 12, and Alaska, Montana, Minnesota, Wisconsin, Michigan, Oregon, Idaho, Wyoming, Nebraska, Indiana, Vermont and Maryland on July 13. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Light skin individuals may get burned in less than 30 minutes. Note: The average daily UV index of 4 in May transform into the following instructions: A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person. UV indexThe average daily maximum UV index in May in Bar Harbor is 4. SunshineIn May, the average sunshine is 7.8h. On the last day of the month, sunrise is at 4:52 am and sunset at 8:09 pm EDT. On the first day of May in Bar Harbor, sunrise is at 5:23 am and sunset at 7:36 pm. Daylight In Bar Harbor, Maine, the average length of the day in May is 14h and 49min. Even a short swim, without thermal protection, at temperatures around 55.4☏ (13☌) is not comfortable. Note: At temperatures below 50☏ (10☌), swimming in a suitably protected swimsuit is feasible otherwise, cold shock and loss of breathing control are imminent. Ocean temperatureIn May, the average ocean temperature in Bar Harbor is 44.2☏ (6.8☌). Throughout the year, there are 48.1 snowfall days, and 23.82" (605mm) of snow is accumulated. During 0.1 snowfall days, in May, Bar Harbor aggregates 0.08" (2mm) of snow. May is the last month it regularly snows. Snowfall January through May, October through December are months with snowfall. Throughout the year, there are 142.1 rainfall days, and 32.28" (820mm) of precipitation is accumulated. Rainfall In Bar Harbor, during May, the rain falls for 14.8 days and regularly aggregates up to 2.28" (58mm) of precipitation. HumidityThe average relative humidity in May is 78%. In Bar Harbor, the average low-temperature is 44.2☏ (6.8☌). TemperatureIn Bar Harbor, Maine, the average high-temperature in May rises from a frosty 48.6☏ (9.2☌) in April to a moderate 58.6☏ (14.8☌). May, the last month of the spring in Bar Harbor, is a mild month, with an average temperature ranging between max 58.6☏ (14.8☌) and min 44.2☏ (6.8☌).
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