Issued by NWS Ohio RFC
AGUS71 KTIR 181747
Ohio River Basin Hydrometeorological Discussion
Ohio River Forecast Center, Wilmington, Ohio
147 PM EDT Saturday, May 18, 2013
Moisture associated with a slow moving upper level trough will continue to
lift north into the southern and western portions of the basin today fueling
scattered showers and isolated thunderstorms. This pattern will continue for
the next day or so with most of the precipitation sliding further and further
By Monday the low will move off to the east and high pressure will build into
the basin. This will not keep the entire basin dry, but rains will be limited
and confined mainly to the edges of the basin. Chances of rain will increase
Tuesday as a front approaches from the west. The front is expected to move
through the basin around Wednesday of next week. Drier, more stable conditions
are expected behind the cold front.
...FLOOD POTENTIAL DISCUSSION...
No flooding is occurring at this time. While there are significant chances for
rain across the middle of the Ohio Valley through mid-next week, it is
expected to be scattered enough that additional river flooding is not
forecast. Some local or flash flooding is possible.
...24-HR OBSERVED PRECIPITATION USED IN TODAY`S RIVER FORECASTS...
Widespread areas of scattered showers with isolated thunderstorms fell across
areas of the central and southern basin. Heaviest amounts were over an inch in
cores through central Indiana, central Ohio, and middle TN. Lighter amounts
were found elsewhere, but usually only totaling a quarter inch or less.
...48-HR FORECAST PRECIPITATION USED IN TODAY`S RIVER FORECASTS...
Day 1 (8am EDT Saturday - 8am EDT Sunday):
Heaviest contour of rain forecast runs through the far southeast corner of
the basin. Totals run up close to an inch here with amounts tapering down
pretty quickly as heads northwest into the Ohio River forecast basin.
Day 2 (8am EDT Sunday - 8am EDT Monday):
Rain focus remains along the far southeast corner of the basin. Western
Virginia totals run up to three-quarters of an inch. Amounts taper quickly down
to a tenth or so by the mainstem.
...RIVER BASINS IN FLOOD...
Detailed precipitation graphics and other maps are available on the HAS Support
Page at this web address: http://weather.gov/ohrfc/HAS
QPF from OHRFC, HPC, et al., can be seen at weather.gov/ohrfc/Forecast.php