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Hydrologic Outlook

Hydrologic Outlook

Hydrologic Outlook
National Weather Service Nashville TN
459 AM CDT Sun May 27 2018

...Periods of Rainfall Expected Through Next Saturday With
Tropical Depression Alberto Bringing Soaking Rainfall To Middle
Tennessee Tuesday into Tuesday Night...

Current subtropical storm Alberto is expected to approach Middle
Tennessee from the south as a tropical depression on Tuesday and
continue holding this strength as it moves across central Middle
Tennessee on Tuesday night. It is expected to push north of the
mid state by Wednesday morning. On average an additional one
quarter to around one half of an inch of rainfall is expected
today through Monday night across the mid state.

Amounts are expected to significantly increase as Tuesday into
Tuesday night progresses. Most of this rainfall associated with
Alberto is expected to occur Tuesday afternoon and evening across
Middle Tennessee. Heaviest amounts are currently expected to be
around and west of the I-65 corridor. Total additional rainfall
amounts Tuesday through Tuesday night are currently expected to
range from around three quarters of an inch across the Cumberland
Plateau Region to around two and one half inches across locations
around and west of I-65 corridor and along and south of the I-40

Alberto will continue to weaken and move northeastward on
Wednesday before eventually dissipating. Middle Tennessee
will then transition to a surface southerly flow pattern with
several upper level disturbance passages expected through next
Saturday. This will bring additional periods of rainfall to the
mid state region. An additional one and one half inches to around
two inches across the entire mid state is currently expected
Wednesday through Saturday, as ground conditions will become
increasingly even more saturated.

Total rainfall amounts expected from today through next Saturday
will range from approaching three inches across the Cumberland
Plateau Region to around four inches across southern portions of
the Tennessee River Valley Region. Locally higher amounts
approaching five inches may be possible for locations approaching
the Tennessee/Alabama border. With this amount of rainfall
expected, flooding of low lying flood prone areas and area creeks
and streams will likely occur. There is also the potential of
more widespread flooding occuring including river flooding.
Additional flood watch and warning products may need to be
issued as this potential flooding situation develops.

Please visit, stay tuned to local media and
NOAA Weather Radio, for the latest on this potential developing
flooding situation across Middle Tennessee.


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