Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
351 AM EDT Mon Jul 21 2014
Valid 12Z Mon Jul 21 2014 - 12Z Wed Jul 23 2014
...There is a slight risk of severe thunderstorms from parts of the
Northern Plains to Upper Great Lakes...
...There is an embedded region of moderate risk of severe thunderstorms
over parts of the Northern Plains to parts of the Upper Mississippi
...Heavy rain possible from parts of the Northern Plains to Upper Great
A slow moving front extending from the Upper Mississippi Valley to the
Northern Intermountain Region will advance eastward to the Upper Great
Lakes and southward to the Central Plains by Tuesday evening. High
moisture content air will intersect the boundary producing showers and
thunderstorms with heavy rain over North Dakota into Minnesota on Monday
evening moving into the Upper Great Lakes by Tuesday morning. By Tuesday
evening, showers and thunderstorms will extend from the Great Lakes to
parts of the Middle Mississippi Valley.
Meanwhile, upper-level impulses over the Northern Intermountain Region
along with a closed upper-level low will rotate to the Pacific Northwest
Coast will produce showers and thunderstorms over parts of the Great
Basin/Northern Intermountain Region into parts of the Northern
Rockies/Northern High Plains through Tuesday. As the upper-level low
closes into the Pacific Northwest, rain will develop over parts of the
Northwest on Tuesday.
In the meantime, upper-level energy over the Lower Great Lakes will move
eastward out over the Western Atlantic triggering showers and
thunderstorms over parts the Central/Northern Appalachians on Monday.
Additional upper-level energy over the Southeast/Central Gulf Coast will
produce showers and thunderstorms from the Central Gulf Coast to the
Southeast/Southern Mid-Atlantic on Monday. On Tuesday the showers and
thunderstorms will become more confined to the Southeast and immediate
Central Gulf Coast and Florida. Elsewhere, weak monsoonal moisture and
diurnal heating will produce showers and thunderstorms over portions of
the Southern Rockies/High Plains during the late afternoon and evening
hours on Monday and Tuesday.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php