Noaa Hourly Weather. Updated by 10 AM PT. 16 hours ago · The best time to see aur
Updated by 10 AM PT. 16 hours ago · The best time to see auroras is within an hour or two of midnight, according to the NOAA. The indices have a range from 0 to 9 and are directly related to the maximum amount of fluctuation (relative to a quiet day) in the geomagnetic field over a three-hour interval. The official normals are calculated for a uniform 30 year period, and consist of annual National Weather Service Home page. Weather Prediction Center's (WPC) Home Page Excessive Rainfall Discussion NWS Weather Prediction Center College Park MD 215 PM EST Mon Jan 19 2026 Day 3 Valid 12Z Wed Jan 21 2026 - 12Z Thu Jan 22 2026 The probability of rainfall exceeding flash flood guidance is less than 5 percent. Cloudy, with a high near 56. Geomagnetic activity is driven by solar activity and solar coronal holes and thus it waxes and wanes with time. Tips on Viewing Aurora: Viewing the aurora depends on four important factors Geomagnetic Activity: If the geomagnetic field is active, then the aurora will be brighter and further from the poles. A brief description of why conditions occurred or are forecast is also included for each category. California Nevada River Forecast Center San Francisco Bay Area Observed Precipitation Map 1 day ago · NOAA National Weather Service Baltimore/Washington Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions.