When we go out during any questionable weather, we always use NOAA’s Hawaii radar. Colder temperatures will be found only at higher altitudes, where, obviously snow is even possible (at the highest points) in winter.īeat of Hawaii Tip #1: Check NOAA Hawaii radar daily. Overall, temperatures typically range from highs of 85–90 during the summer to 79–83 during the winter. In total, rain averages about 15 percent of the time in those six months. Showers at sea level are often passing, however, with rain one minute and sun the next. Better weather is ahead, starting next Thursday.īetween November and April, we do expect rain, although this much snow is unusual. A flood warning is in effect and the National Weather Service said that rain totals could be 12 inches or more. Rainfall amounts of 2-3 inches per hour are possible. Rain will then be moving from east to west so Maui will be in line to receive the brunt of the weather. While snow at the volcanoes isn’t that unusual in winter, the quantity expected is.
Mauna Kea and Mauna Loa sit at an elevation of nearly 14,000 feet. This magnitude of weather event is something seen only every few years in Hawaii.Ī National Weather Service blizzard warning in effect for the Big Island summits is in effect until Sunday morning. Rain and flooding are in the forecast too. The Big Island and its volcanic peaks are getting the worst of it, with up to 100 mile-per-hour winds and perhaps a foot or more of snow expected. The strong and unusual Hawaii weather is as the result of a Kona low which has enveloped the state in moisture being sucked up from south of Hawaii. You can check the Mauna Kea Weather Center from the University of Hawaii for webcams and more. Snow started falling yesterday at the summits of Mauna Kea and Mauna Loa on the Big Island. Twelve inches or more snow is possible this weekend. So what does this mean for your Hawaii vacation and the best time to visit Hawaii? See what’s going on today, and our tips below. And while we are by no means complaining, as Hawaii weather in winter generally is cool at night, in the ’60s, even at the beach.
Since hail can cause the rainfall estimates to be higher than what is actually occurring, steps are taken to prevent these high dBZ values from being converted to rainfall.It is winter in Hawaii and some places are expecting very heavy snow. Hail is a good reflector of energy and will return very high dBZ values. These values are estimates of the rainfall per hour, updated each volume scan, with rainfall accumulated over time. Depending on the type of weather occurring and the area of the U.S., forecasters use a set of rainrates which are associated to the dBZ values. The higher the dBZ, the stronger the rainrate. Typically, light rain is occurring when the dBZ value reaches 20. The scale of dBZ values is also related to the intensity of rainfall. The value of the dBZ depends upon the mode the radar is in at the time the image was created. Notice the color on each scale remains the same in both operational modes, only the values change. The other scale (near left) represents dBZ values when the radar is in precipitation mode (dBZ values from 5 to 75). One scale (far left) represents dBZ values when the radar is in clear air mode (dBZ values from -28 to +28). Each reflectivity image you see includes one of two color scales.
The dBZ values increase as the strength of the signal returned to the radar increases. So, a more convenient number for calculations and comparison, a decibel (or logarithmic) scale (dBZ), is used. Reflectivity (designated by the letter Z) covers a wide range of signals (from very weak to very strong). "Reflectivity" is the amount of transmitted power returned to the radar receiver. The colors are the different echo intensities (reflectivity) measured in dBZ (decibels of Z) during each elevation scan.
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