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Short Range Public Discussion
(Caution: Version displayed is not the latest version. - Issued 2013Z Mar 25, 2017)
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Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 413 PM EDT Sat Mar 25 2017 Valid 00Z Sun Mar 26 2017 - 00Z Tue Mar 28 2017 ...There is a slight risk of severe thunderstorms over a portion of the Lower Mississippi Valley... ...Heavy rain possible over parts of the Tennessee Valley/Southern Appalachians... ...Rain/freezing rain possible over parts of the Upper Great Lakes and the Northeast... ...Severe weather possible over portions of the Southern Plains Sunday... ...More rain and snow to impact the Northwest U.S. over the next few days... An strong low pressure system over the Middle Mississippi Valley will move northeastward across the Ohio Valley, weakening somewhat as it reaches the Great Lakes region Sunday night into Monday. Moisture from the Gulf of Mexico will stream northward into the Ohio Valley and pool along the associated stationary frontal boundary spanning eastward from the low into the Mid-Atlantic. Showers and thunderstorms will result, developing along and ahead of the potent cold front over the Middle/Lower Mississippi Valley that will move eastward to the Eastern Ohio Valley/Eastern Gulf Coast by Sunday. The Storm Prediction Center has outlined a portion of the Lower Mississippi Valley along the Gulf Coast as being in a slight risk for severe thunderstorm activity this afternoon/overnight. Please refer to their website for more information: Meanwhile any precipitation that occurs on the north side of the west-to-east oriented northern frontal boundary will be in the cold sector, and may result in some freezing rain across the Upper Great Lakes tonight/Sunday morning, and across the far northeast over the next couple of days. As this low pressure system progresses eastward, a secondary system over the southern Plains will begin to strengthen, bringing rain and higher elevation snow to the Rockies overnight tonight. By Sunday, the precipitation will begin to taper off as this low pressure system progresses eastward and strengthens. Frontal features will begin to merge with the weakening eastward system, with the strong surge of warm, moist, and unstable air being redirected back into the Central and Southern Plains Sunday afternoon. Showers and thunderstorms will develop Sunday, spreading into the Mississippi River Valley Sunday night as the systems shifts northeastward, and onwards towards the Atlantic Coast over the next few days. Once again, the Storm Prediction Center has outlined central Oklahoma and northeast Texas as being in a Slight and Enhanced region for severe weather development Sunday into Sunday night due to the strong instability related to this system. Finally, another strong low pressure system will make landfall across the Pacific Northwest during the day Sunday. This will bring yet another round of heavy rain and higher elevation snow across much of the Northwest Sunday and Monday. Flood warnings and advisories remain in effect for Northeast Nevada and much of Idaho. Wix Graphics available at