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Ohio River Basin Hydrometeorological Discussion
Ohio River Forecast Center, Wilmington, Ohio
1156 AM EDT Friday, May 9, 2008
...HYDROMETEOROLOGICAL DISCUSSION...
A low pressure system that brought rain to the Ohio Valley Wednesday and
Thursday moved east of the basin early Friday morning. As a result, rainfall
tapered off in the eastern Ohio Valley on Friday.
More rainfall is on tap, however, as another weather disturbance will move
into the western Ohio Valley later today and through the basin overnight. The
result will be another round of showers and possibly thunderstorms late today
and tonight.
Saturday will bring a brief reprieve from rainfall as an area of high pressure
drifts across the region keeping conditions dry.
Another storm system will approach the basin on Saturday night and move slowly
through the basin, exiting to the east on Monday. This system has the potential
to produce thunderstorms with locally significant rainfall, but amounts are
not expected to be excessive.
...FLOOD POTENTIAL DISCUSSION...
Flooding has already begun in portions of southwest Indiana and southeast Ohio.
Flood potential is moderate for addition minor flooding downstream...along the
lower White, Wabash, Little Wabash and Ohio Rivers. Elsewhere, flood potential
remains low.
...24-HR OBSERVED PRECIPITATION USED FOR TODAY'S RIVER FORECASTS...
All but far northern Indiana, Ohio and Pennsylvania received rainfall in the
24-hours ending at 8 AM EDT Friday morning. Heaviest amounts fell in northeast
Kentucky, central West Virgina and west central Ohio where basin averages
ranged from 1.25 to near 2.00 inches.
...24-HR FORECAST PRECIPITATION USED FOR TODAY'S RIVER FORECASTS...
Rainfall is forecast for nearly the entire basin. Amounts increase towards
southwest Pennsylvania where basin averages of 0.75 to 0.90 inch are forecast.
Basin average amounts greater than 0.50 inch is forecast across southeast Ohio,
northern West Virginia and southwest Pennsylvania.
...RIVERS IN FLOOD...
Points along the following rivers were in flood Friday morning:
River Forecast Point Flood Stage Latest Stg Tendency *
White River Petersburg 16 16.6 Rising
Wabash River Lawrenceville 30 30.1 Falling
Little Wabash Ri Clay City 16 20.1 Steady
Detailed precipitation graphics and other maps are available on the HAS Support
Page at this web address: http://weather.gov/ohrfc/HAS
* Tendency based on observed value and a 1-day forecast.
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