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Short Range Public Discussion
(Caution: Version displayed is not the latest version. - Issued 2133Z Nov 22, 2014)
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Short Range Forecast Discussion...corrected NWS Weather Prediction Center College Park MD 433 PM EST Sat Nov 22 2014 Valid 00Z Sun Nov 23 2014 - 00Z Tue Nov 25 2014 ***Unsettled weather pattern for the western U.S.*** ***Strong low pressure to impact the Great Lakes*** ***Moderating temperatures and widespread rain for the eastern U.S. into early next week*** A Pacific storm system currently crossing the western U.S. this weekend is expected to bring widespread precipitation from the Pacific Northwest to the central Rockies through tonight and early Sunday. This will include numerous rain showers and higher elevation snow for the Great Basin and the Rockies. The activity will taper down during the day Sunday as high pressure steadily noses east into the West and this will yield considerably drier weather for the start of the new week. Across the central and eastern U.S., very changeable weather conditions can be expected over the next couple of days. Two areas of low pressure, with one initially over the northern Plains and a second and gradually more dominant low center developing over the lower Mississippi Valley will work in tandem to drive a significant warm-up at least for a couple of days over the eastern half of the country. Widespread rainfall, some of it heavy, is expected over southern Plains and lower Mississippi Valley tonight into very early Sunday, but this will shift east across the Gulf Coast states on Sunday as a warm front is expected to lift north across this region. Warmer temperatures will surge north across the Ohio Valley...Mid-Atlantic and the Northeast Sunday and Monday as the surface low center over the Mississippi Valley intensifies rapidly and lifts through the Great Lakes region and drives the aforementioned warm front well north up the eastern seaboard. Moderate to locally heavy rains will be possible through Monday across the East, but there will be a strong cold front then advancing rapidly east by late Monday across the East which will be approaching the East Coast by Monday night. Unfortunately, the much warmer temperatures coupled with heavy rainfall potential may result in some flooding concerns over portions of the lower Great Lakes region where record or near record lake effect snowfall occurred over the last week. Much colder air in the wake of the Great Lakes low center will surge southeast, and so the warm-up while significant, should be rather short-lived. The cold air tucked in close to the low center will favor accumulating snowfall for the upper Great Lakes region by late Monday. This cold air will filter well south across the southern Plains and the Gulf Coast region, which will bring temperatures generally back to below normal levels, but with drier conditions to start the new week. Orrison Graphics available at