Dangerous heat will build across portions of the West through this week where new daily record highs are forecast. Monsoonal showers and thunderstorms may result in flash flooding and debris flows for portions of Southwest into the Four Corners and central Rockies through at least the midweek. Stationary frontal boundary across the South and Southeast will focus showers and thunderstorms. Read More >
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Forecast and Warning Definitions
Lake Superior Forecasts for the open waters are issued four times daily throughout the year, at 4:00am, plus every six hours with intermediate updates as necessary. Nearshore Marine Forecasts are issued four times daily, at 5:00am plus every six hours with intermediate updates as necessary. Forecast wave heights are for the average of the highest third of the waves at the end of the fetch in the forecast area. Wind directions and speeds are forecast for roughly 33 feet above the lake surface. Marine warnings and advisories are headlined within marine forecasts:
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