000
AGUS71 KTIR 041656
HMDTIR
Ohio River Basin Hydrometeorological Discussion
Ohio River Forecast Center, Wilmington, Ohio
1255 PM EDT Saturday, July 4, 2009 

...HYDROMETEOROLOGICAL DISCUSSION...
A low pressure system will move slowly from west to east across the middle 
Ohio Valley beginning today and exiting to the east on Sunday afternoon. This 
will put a damper on the holiday weekend for much of the Ohio Valley, 
especially areas south of the Ohio River.

Next week looks uneventful in a dry northwest flow pattern initially. As
the week unfolds, an upper level ridge should gradually build in providing
a noticeable warming trend and even lower chances of precipitation.

...FLOOD POTENTIAL DISCUSSION...
The threat of localized river flooding will increase this weekend, but
chances are still relatively slim. More likely, any flooding resulting from
this weekend's rainfall event will be localized flash flooding.

...24-HR OBSERVED PRECIPITATION USED FOR TODAY'S RIVER FORECASTS...
Showers exited the eastern Ohio Valley on Friday and were just entering the 
western Ohio Valley on Saturday morning. Basin average amounts were all around
0.10 inch or less.

...24-HOUR FORECAST PRECIPITATION USED FOR TODAY'S RIVER FORECASTS...
Rainfall is forecast across all but the northeast half of Ohio, northern
West Virginia, western Pennsylvania and western New York.  Heaviest basin-
average amounts will range from 1.00 to 1.75 in southern Illinois, southwest
Indiana, portions of western and southern Kentucky and middle Tennessee.

...RIVER BASINS IN FLOOD...
None.

Detailed precipitation graphics and other maps are available on the HAS Support
Page at this web address:  http://weather.gov/ohrfc/HAS

$$
Link Crawford