Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 431 AM EDT Sun Jun 07 2020 Valid 12Z Sun Jun 07 2020 - 12Z Tue Jun 09 2020 ...Tropical Storm Cristobal expected to make landfall in Louisiana late today and then up the Mississippi Valley into Tuesday with heavy rain, strong wind gusts, coastal flooding, and isolated tornadoes possible... ...Strong low pressure system to generate severe thunderstorms across the northern Plains while heavy snow is possible in parts of the northern Rockies... ...The West cools off substantially but critical to extreme fire danger continues in the southern Rockies and High Plains... Cristobal has been maintaining tropical storm intensity as it continues to move toward the central Gulf Coast this Sunday morning. Landfall will likely occur on the Louisiana coast around sunset today. Winds increasing to tropical storm force together with torrential rain, high seas, and isolated tornadoes can be expected to batter the Louisiana coast into tonight. Squalls and very heavy downpours associated with the strong rainbands of Cristobal will likely sweep across southern Mississippi, southern Alabama, and possibly the western panhandle of Florida this evening, resulting in flash flooding in parts of the area. Cristobal is forecast to head further inland and gradually weaken while bringing a quick dose of very heavy rain and gusty winds along and to the west of the Mississippi Valley into Tuesday. Meanwhile, an anomalously broad and vigorous upper trough for this time of the year will swing through the western U.S. into the start of the upcoming week. Severe weather is likely to shift further northeast across the northern Plains later today as a low pressure system intensifies in the Canadian Prairies. Cold air behind the low pressure system will support meaningful snowfall across the higher elevations of the Great Basin, Intermountain region, and especially for the Bitterroot and Sawtooth mountain ranges where heavy snow is possible this evening into Monday. Across the northern and central Plains, another low pressure system could form along a slow-moving cold front and will likely trigger additional severe storms and heavy rainfall for these areas. In contrast to the wetter pattern in the northern Plains, dry and windy conditions will continue to support critical to extreme fire danger from the southern High Plains and southern Rockies to the Four Corners region. Much cooler temperatures behind a strong cold front will engulf the West and will only lower the fire danger slightly across the Southwest by Tuesday. While parts of the Northwest witness wintry conditions, summer heat will surge up across the northern Plains today, reaching the Upper Midwest on Monday, and into the Great Lakes by Tuesday. Farther south, triple-digit high temperatures are likely across West Texas on Monday. Meanwhile, cooler and more comfortable temperatures across the Northeast today will gradually warm up and become more humid Monday into Tuesday. Kong Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php