Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
343 AM EDT Sun Jul 15 2018
Valid 12Z Sun Jul 15 2018 - 12Z Tue Jul 17 2018
...Heavy rain possible over parts of the Eastern Gulf Coast...
A dissipating quasi-stationary front extending from parts of the
Northeast/Lower Great Lakes southwestward to the Central High Plains will
aid in developing showers and thunderstorms from parts of the Northeast
southwestward to the Southern High Plains. The boundary dissipates
overnight Sunday. The moisture associated with the front sinks southward
into the Mid-Atlantic to the Ohio Valley by Sunday evening remaining
through Monday evening. The moisture and daytime heating will aid in
producing showers and thunderstorms from the Southern Mid-Atlantic into
the Ohio and Tennessee Valleys through Monday night into Tuesday morning.
In addition, tropical moisture extending from the Southern Plains to the
Southeast along with daytime heating will aid in producing showers and
thunderstorms over the region through Monday evening.
Meanwhile, a front extending from the Upper Mississippi Valley
southwestward to the Central Rockies will move eastward to the Lower Great
Lakes/Ohio Valley then westward to the Southern High Plains through
Tuesday morning. Showers and thunderstorms will develop along and ahead
of the boundary from the Upper Mississippi Valley into the Central Rockies
that will move eastward to the Lower Great Lakes/Northern Mid-Atlantic
southwestward to the Southern High Plains by Monday evening.
Additionally, monsoonal moisture and daytime heating will aid in producing
showers and thunderstorms over parts of the Southwest/Great Basin and the
Central/Southern Rockies through Monday evening. The greatest areal
coverage of the precipitation will be during the late afternoon into the
late evening on Sunday and Monday. Elsewhere on Sunday morning,
upper-level energy will move onshore over parts of the Pacific Northwest
and Northern California moving inland to the Northern Intermountain Region
by Monday evening. The energy will trigger scattered showers and
thunderstorms over parts of the Pacific Northwest, Northern California,
and the Great Basin through Monday evening.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php