Issued by NWS Ohio RFC
AGUS71 KTIR 111604
Ohio River Basin Hydrometeorological Discussion
Ohio River Forecast Center, Wilmington, Ohio
1104 AM EST Wednesday, December 11, 2013
A weak disturbance will pass across the northern Ohio Valley today. By sunrise
on Wednesday this was already bringing light snow showers to the northwestern
portion of the Ohio Valley. This snow will pass east across the northern Ohio
valley today and this evening. It will be followed by more high pressure,
again keeping most of the basin dry through Friday with the exception of
local lake effect snows.
Temperatures will begin to warm slightly by Friday. This in response to some
southerly flow ahead of a weather system that will pass through the region
Friday night through Saturday night. This will bring precipitation, though
not in heavy amounts, to the entire area, with rain in the south and a wintry
mix and snow in the north.
...FLOOD POTENTIAL DISCUSSION...
At this time all rivers have fallen below flood stage. The potential for
additional flooding is minimal with no significant precipitation forecast
this week. The lone exception is on the lower Ohio River at Newburgh, IN
later this week as water routes down.
...24-HR OBSERVED PRECIPITATION USED IN TODAY`S RIVER FORECASTS...
Measurable precipitation fell over much of the southeast half of the Ohio
Valley and also across much of the north. Basin average amounts were light
at around 0.10 inch or less. The one exception was some locally heavy lake
effect snowfall resulting in basin averages around 0.50 inch in the far
northern reaches of the Allegheny Watershed.
...48-HR FORECAST PRECIPITATION USED IN TODAY`S RIVER FORECASTS...
Precipitation is forecast to fall mainly north of Interstate 70, as well as in
the higher terrain of eastern West Virginia. Basin average amounts will be
light, with the exception of amounts approaching an inch in far western New
York and far northwestern Pennsylvania.
...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