The Memorial Day Weekend, summer`s unofficial kick-off, has arrived and there will be a mixed bag of spring and summer to go around across the U.S. WeatherBug Meteorologist Addison Green has the latest in this exclusive WeatherBug National Outlook Video. Today: The weekend will start out with a few trouble spots across the Plains and Northeast, messing up a few outdoor activities and trips to a few Atlantic beaches. A lumbering low off the Northeast will produce pockets of heavy rain from New Jersey to Maine. The rain and thick clouds coming off the cool Atlantic Ocean will keep temperatures in the upper 40s to mid-50s across New England, with a few low 60s across Pennsylvania and New Jersey. Similar readings will also be found across the Upper Midwest, Great Lakes, eastern Plains and central Appalachians, but at least plenty of sunshine will make it feel warmer. Just like the way the workweek concluded across the High Plains, a few areas of downpours and storms will throw a wrench into outdoor plans and barbecues from Texas to the Dakotas. Even worse, a few of these thunderstorms will become strong-to-severe from far northwestern Kansas into eastern Montana, where gusty winds and large hail will be the main concerns. In between the showers and thunderstorms, splashes of sunshine will push the mercury into the 70s and 80s. Even a few low 90s will pop up across the central and southern Plains from Nebraska into the Texas Panhandle. The Northwest and Mountain West will see a few showers as temperatures stay in the upper 60s and lower 70s. California, the Southwest, Great Basin, South, Gulf Coast, and Florida will have the warmest temperatures with highs in the upper 80s and low 90s. Sunday: Few weather changes from Saturday will occur across the U.S. on Sunday. The exception will be a return of brighter skies from New Jersey to southern New England, where showers will break apart early during the morning. Unfortunately, central and northern New England will have a tougher time breaking free of bouts of showers and light rain on Sunday. Temperatures will still struggle to climb out of the 40s and 50s from northern Massachusetts to Maine, but 60s and a few very low 70s will squeak into the picture under strong late-May sunshine along the I-95 corridor from Providence, R.I., to Richmond, Va. Just like Saturday, several bursts of downpours and thunderstorms will patrol the central and northern High Plains, Mississippi Valley, and Midwest to Ohio Valley on Sunday. Even the same western Nebraska to southeastern Montana residents could be contending with a few more fresh thunderstorms later in the afternoon and evening. Even so, temperatures will jump into the 80s and low 90s, except 60s and a few low 70s will dominate the Dakotas and Midwest to Ohio Valley. The only other area of rainy weather will be found in the Northwest, where a few showers will interrupt afternoon plans. The rest of the Lower 48 states, including California, the Southwest, Great Basin, Rockies, South, Gulf Coast, Southeast and Florida will see plenty of sunshine and temperatures in the upper 80s and low 90s. Memorial Day: A status quo weather pattern will continue across most of the U.S. for Memorial Day, making it a good day to head out to your community`s holiday events. The only weather hiccups will be found from northern California to the Northwest, and Montana through the Great Lakes and Ohio Valley, as well as across western Texas and the central Appalachian Spine. Here, steady rain, downpours, and even a few clusters of thunderstorms will have residents seeking umbrellas and rain gear instead of sunglasses and bathing suits. The rest of the U.S. will see plenty of sunshine and warming temperatures. The warmest weather will stretch across the U.S. Southern-tier, with low 90s found in the Southwest and 80s stretching from California eastward into the South and Southeast. This includes most of the central Plains and central and lower Mississippi Valley. The rest of the U.S. will have pleasant 70s, with the Rockies and extreme northern New England seeing 60s. Be sure to keep WeatherBug active to receive the latest weather in your neighborhood and get the latest updates anywhere on Twitter. What do you think of this story? Click here for comments or suggestions.