National Weather Service United States Department of Commerce
WATER RESOURCES OUTLOOK NATIONAL WEATHER SERVICE OHIO RIVER FORECAST CENTER WILMINGTON OH 245 PM EDT Wednesday March 29 2017 THE FOLLOWING IS THE 30-DAY WATER RESOURCES OUTLOOK FOR April ...WATER RESOURCES STREAMFLOW OUTLOOK... Above normal streamflows are expected for the drainages into Lake Erie as well as the headwaters of the Allegheny watershed. Elsewhere...streamflows are forecast to average near normal during April. ..................................................................... ...HYDROLOGIC FLOOD AND DROUGHT POTENTIAL... The risk for flooding is normal. Normal flood potential means flooding can be expected in the Ohio Valley with water levels having minor impacts. ..................................................................... ...March Hydrometeorological Review... Very mild temperatures occurred in April across the Ohio Valley. Average temperatures were 1 to 3 degrees above normal. Precipitation also averaged above normal during March with the greatest departures from normal across the eastern half of the Ohio River Basin. Hydrologically...minor flooding occurred in parts of the Wabash and White basins in Indiana. http://www.weather.gov/ohrfc/images/dynamic/latest30day.jpeg ...SOIL MOISTURE CONDITIONS... Moist to wet soils exist across the Ohio Valley due to frequent rainfall. http://www.cpc.noaa.gov/soilmst/w.shtml ...STREAMFLOW CONDITIONS... Average streamflows were generally normal across the Ohio River Basin with scattered below normal flows across watersheds in the state of Kentucky as well as the Little Wabash and Maumee basins. http://watermonitor.gov ..................................................................... ...ATMOSPHERIC TELECONNECTION AND OSCILLATION FORECASTS FOR April... ARCTIC OSCILLATION trending negative = drier NORTH ATLANTIC OSCILLATION trending positive = wetter PACIFIC/NORTH AMERICAN TELECONNECTION will be positive = drier Weak El Nino = normal. http://www.cpc.noaa.gov ..................................................................... ...Summary... Teleconnections are not in consensus on weather pattern for April. Storm occurrence has been more frequent during the last week of March...possibly signaling an active pattern for April which typically is a wet period for the Ohio Valley. Hydrologically...periods of flooding is expected which is normal for this time of the year in the Ohio River Basin. Even though streamflows could be running high...this is normal for April. ....................................................................... VISIT OUR WATER RESOURCES WEBSITE AT http://www.weather.gov/ohrfc/WRO IN ADDITION TO A 30-DAY STREAMFLOW OUTLOOK...YOU CAN ALSO OBTAIN A 60- AND 90-DAY OUTLOOK AT THE WEBSITE $$ Wheeler