NWS Seattle Briefings & Information

Areas of Excessive Rainfall and Severe Thunderstorms for Friday

Heavy to excessive rainfall may produce areas of flooding Friday and Friday night from central Texas into the lower Mississippi Valley. Scattered strong to severe thunderstorms are expected from central Texas to middle Tennessee and central Kentucky Friday afternoon into early Friday night. Large hail and damaging winds are the main threats. Read More >

Weather Risk Outlook

The Weather Risk Outlook colors are determined after NWS Seattle meteorologists examine both the impact level of potential weather scenarios AND the associated probability of those scenarios. The resulting outlook displays the highest risk for each day.

NWS Seattle meteorologists first use the impact table to determine the level of impact expected with a forecast weather event.

NWS Seattle meteorologists then determine the color by determining the probability of occurrence using all the available information and then reference the matrix to determine the risk level associated with the forecast weather event.