Source: Maksim Mikhailov / GettyWhat Is A Hydrologic Outlook? If you’ve ever seen the National Weather Service issue a “hydrologic outlook” and wondered what it actually means, here’s the breakdown. A hydrologic outlook is a forecasting tool issued by meteorological agencies, including the National Weather Service, that gives a broad look at expected water conditions in a region over the coming weeks or months. Outlook, watch and warning represent increasing levels of urgency: an outlook is the earliest, broadest heads-up; a watch means conditions are becoming favorable for flooding; a warning means flooding is imminent or already happening. That’s why officials stress treating a hydrologic outlook as an early planning tool rather than a guarantee, and continuing to monitor official watches and warnings as conditions develop.