Hydrometeorological Discussion
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AGUS71 KTIR 281754
HMDTIR
Ohio River Basin Hydrometeorological Discussion
Ohio River Forecast Center, Wilmington, Ohio
1254 PM EST Saturday, February 28, 2015

...HYDROMETEOROLOGICAL DISCUSSION...
A broad storm system moves into the Ohio Valley by this evening.  This will
bring a plethora of precipitation type to the area.  Rain across the southern
third of the basin, Snow and rain over the middle third and snow over the north.
This will clear the basin by early Monday with a dry day for the basin.  The
next, and more significant, storm will enter the basin early Tuesday and
overspread the basin during the day.  Strong southerly flow ahead of this system
will result in rain for the entire basin Tuesday, Wednesday and lingering into
Thursday across the south.  Precipitation won`t end in the south until late
Thursday with a dry but cooler day on Friday.

...FLOOD POTENTIAL DISCUSSION...
Flood potential will be low through Monday due to additional snowfall combined
with light rain and somewhat warmer temperatures. This will change on Tuesday
and linger through the end of the week. Low pressure from the southern plains
with strong southerly flow will bring in moderate to heavy rainfall and above
normal temperatures.  All of this will result in melting the extensive snow pack
across the region bringing moderate to high probabilities of flooding for the
southern half of the basin and low to moderate over the north.  An exception
will be over the Allegheny basin as the temperatures will not be warm enough to
cause enough melt for much flooding that at all.

...24-HR OBSERVED PRECIPITATION USED IN TODAY`S RIVER FORECASTS...
Some light snow showers in portions of West Virginia resulted in areas of a few
hundredths of an inch.  Elsewhere, the 24 hour observed precipitation was zero.

...48-HR FORECAST PRECIPITATION USED IN TODAY`S RIVER FORECASTS...
Rain and snow will move into the basin tongitha and overspread the basin through
the forecast period.  Overall amounts are a half inch to eight tenths of an inch
along an Interstate 70 corridor.  Some lesser amounts around a third of an inch
across the northern edge of the forecast area and across southern Illinois,
southern Indiana, southern Ohio into Wet Virginia.  Elsewhere, less than a
quarter inch is forecast.

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

Forecast precipitation graphics are available on the OHRFC Website
at the following address:  http://weather.gov/ohrfc/ForecastPrecipitation

$$
JEH




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