Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 AM EDT Mon Jun 08 2020 Valid 12Z Mon Jun 08 2020 - 12Z Wed Jun 10 2020 ...A swath of heavy rain is expected to impact areas just west of the Mississippi River as Cristobal continues to track far inland toward the Great Lakes through Tuesday... ...Heavy snow develops in parts of the northern Rockies as severe thunderstorms become increasingly likely across the northern and central Plains, ... ...The West cools off substantially but critical to extreme fire danger continues in the southern Rockies and High Plains... After making landfall in southeastern Louisiana yesterday, tropical storm Cristobal has continued to track further inland into the lower Mississippi Valley. Cristobal has been weakening relatively slowly over land, and continues to bring intense rain bands and tropical storm force wind gusts into Mississippi and Alabama. A High Risk for excessive rainfall remains in place for eastern Louisiana and southern Mississippi along with the ongoing threat for dangerous coastal flooding along the Central Gulf Coast. Cristobal is expected to bring a quick dose of heavy rain just west of the Mississippi River together with gusty winds and isolated severe weather during the next couple of days. Cristobal is not the only significant storm system in town as an anomalously broad and vigorous upper trough for early June swings through the western and central U.S. the first half of the week. Severe storms should develop across the northern Plains this afternoon as a low pressure system intensifies in the Canadian Prairies. Cold air behind the low pressure system will support periods of snow across the higher elevations of the Great Basin, Intermountain region, and especially for the Bitterroot, Salmon River, and Sawtooth mountain ranges where heavy snow is possible this evening into Monday. Across the northern and central Plains, another low pressure system looks to form along a slow-moving cold front triggering additional severe storms and heavy rainfall for these areas. Meanwhile, a drier and windy pattern continues to support critical to extreme fire danger from the southern High Plains and southern Rockies to the Four Corners region through Tuesday. Temperature-wise, a strong cold front ushers in a very cool air-mass for early June across the West and will only lower the fire danger slightly across the Southwest by Tuesday. Temperatures look to be cold enough that Frost Advisories and Freeze Warnings have been posted for parts of the Great Basin and Intermountain West. While parts of the Northwest witness wintry conditions, summer heat engulfs the Plains today, then into the Upper Midwest on Monday, and into the Great Lakes by Tuesday. Farther south, triple-digit high temperatures are likely across western and central Texas on Monday. Tuesday's heat indices look to range between 100-110 across east and south Texas. Cooler and more comfortable temperatures across the Northeast today gradually warm up and become increasingly more humid Monday into Tuesday. Kong/Mullinax Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php