Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 AM EDT Tue Jun 12 2018 Valid 12Z Tue Jun 12 2018 - 12Z Thu Jun 14 2018 ...Severe thunderstorms possible across the Central Plains today, eastern Ohio Valley and the Northeast on Wednesday and across the Northern Plains on Thursday... ...Heavy rain and flash flooding possible for portions of the Ohio Valley today and Upper Midwest on Wednesday... ...Warming trend expected for the interior Northwest and northern Mid-Atlantic region into mid-week... Scattered to widespread thunderstorms can be expected along and east of an area of low pressure and associated cold front that is moving through the central U.S. This frontal boundary along will moisture feeding north from the Gulf of Mexico will be the focus for continued convection over the next couple of days. The forecast shows 1 to 3 inches of rain through Wednesday for the Ohio Valley although locally higher amounts will be possible. The Storm Prediction Center has identified an Slight Risk of severe storms for much of the Central Plains today and from eastern Ohio/West Virginia to upstate New York on Wednesday. An Enhanced Risk surrounded by a Slight Risk encompasses most of North Dakota and northwest Minnesota on Thursday. A threat for tornadoes, large hail and strong winds will be present in addition to flash flooding for the described areas. Please refer to SPC webpage for additional detail on the risks for severe wx and WPC webpage for the risk of excessive rainfall. High pressure will continue to settle southward along the Mid-Atlantic coast through tomorrow, before weakening and reforming farther north on Wednesday. While temperatures are forecast to remain 5 to 10 degrees below average for the Mid-Atlantic region on Tuesday, high temperatures should rise a bit above average for portions of the Mid-Atlantic region with some 90s expected. High pressure building in over the Pacific Northwest and Intermountain region will result in a warming trend through the middle of the week along will mostly dry conditions. Afternoon temperatures from Montana into Idaho will range from the 70s to 90s, which is roughly 10 degrees above mid-June averages. Light rain will begin moving into the Pacific Northwest late Tuesday into Wednesday as a Pacific front approached the coast. Campbell/Otto Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php