National Weather Service United States Department of Commerce
WATER RESOURCES OUTLOOK NATIONAL WEATHER SERVICE OHIO RIVER FORECAST CENTER WILMINGTON OH 155 PM EDT Friday July 31 2020 THE FOLLOWING IS THE 30-DAY WATER RESOURCES OUTLOOK FOR AUGUST ...WATER RESOURCES STREAMFLOW OUTLOOK... STREAMFLOWS WILL AVERAGE NEAR NORMAL WITH POSSIBLE BELOW NORMAL FLOWS IN THE UPPER OHIO VALLEY AND SLIGHTLY ABOVE NORMAL FLOWS IN EXTREME LOWER OHIO VALLEY. ..................................................................... ...HYDROLOGIC FLOOD AND DROUGHT POTENTIAL... FLOOD RISK WILL BE NEAR NORMAL WHILE THE DROUGHT RISK WILL BE LOW. ..................................................................... ...HYDROMETEOROLOGICAL REVIEW FOR JULY... RAINFALL WAS 50 TO 75 PERCENT OF NORMAL EXCEPT IN THE LOWER OHIO VALLEY WHERE PRECIPITATION WAS 150 TO 200 PERCENT ABOVE NORMAL. MINOR FLOODING OCCURRED AT CLAY CITY ALONG THE LITTLE WABASH RIVER IN SOUTHEAST ILLINOIS ON A COUPLE OF OCCASSIONS. https://www.weather.gov/ohrfc/images/dynamic/latest30day.jpeg ...SOIL MOISTURE CONDITIONS... SOIL MOISTURE IS ABNORMALLY DRY IN THE EASTERN HALF OF THE OHIO RIVER BASIN, NORMAL IN WESTERN HALF EXCEPT ABNORMALLY MOIST IN THE LITTLE WABASH WATERSHED. https://www.cpc.ncep.noaa.gov/soilmst/w.shtml ...STREAMFLOW CONDITIONS... FLOWS ARE RUNNING NORMAL TO BELOW NORMAL DURING THE LAST 30 DAYS AND ABOVE NORMAL IN THE LITTLE WABASH WATERSHED. https://watermonitor.gov ..................................................................... ...ATMOSPHERIC TELECONNECTION AND OSCILLATION FORECASTS FOR JULY... ARCTIC OSCILLATION NEUTRAL = RAINFALL NORMAL NORTH ATLANTIC OSCILLATION NEUTRAL = RAINFALL NORMAL PACIFIC/NORTH AMERICAN TELECONNECTION POSITIVE = RAINFALL BELOW ENSO - LA NINA WEAK = RAINFALL NORMAL https://www.cpc.ncep.noaa.gov ..................................................................... ...SUMMARY... EVEN THOUGH TELECONNECTIONS POINT TOWARDS NORMAL TO SLIGHTLY BELOW NORMAL RAINFALL...THE MAIN DRIVERS WILL BE LOCAL SOIL MOISTURE CONDITIONS AS WELL AS TROPICAL MOISTURE FEED AROUND THE BERMUDA HIGH INTO LOW PRESSURE SYSTEMS MOVING THROUGH THE OHIO VALLEY. ....................................................................... 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