Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 409 AM EDT Sun Jun 12 2022 Valid 12Z Sun Jun 12 2022 - 12Z Tue Jun 14 2022 ...Dangerous heat to continue across the Southwest today before cooler temperatures arrive on Monday... ...Dangerous heat to continue across the southern and central Plains today, then shifting farther north and east on Monday and Tuesday... ...Strong to severe storms possible across portions of the northern and central Plains, Ohio Valley, and Mid Atlantic today... Excessive Heat Warnings and Heat Advisories currently cover an expansive portion of the U.S. -- stretching from the Dessert Southwest to the lower and mid Mississippi Valley. Another day of record-setting heat is expected across those areas, with daytime temperatures forecast to soar into the triple digits in many locations today. This will likely be the last in this stretch of record-setting days in the Southwest, as a strong Pacific cold front drops into the region, introducing notably cooler temperatures into the region on Monday. However, the heat will expand across the central into the eastern U.S., will record-breaking temperatures extending north into the central Plains and east from the mid Mississippi Valley to the Carolinas on Monday. Temperatures will begin to moderate across the Plains on Tuesday as the front moving through the West begins to impact the region. However, ahead of the front, the heat will continue to build, with well-above normal to record-breaking temperatures expected from the Midwest to the Carolinas on Tuesday. In addition to cooler temperature, the system moving across the West is expected to bring additional precipitation to the Pacific Northwest, Northern California, and the northern Rockies through the remainder of the weekend. Flood Watches remain in effect across parts of Washington, Oregon, Idaho, and Montana where the combination of moderate to heavy rain, melting snow, and saturated soils is promoting significant rises along the area's rivers and streams. As the system moves east of the Rockies, a strong area of low pressure is forecast to develop over southern Canada late Monday, promoting windy conditions and rain changing to snow across portions of the northern Rockies. A Winter Storm Watch remains in effect late Monday and Tuesday for the West Glacier Region and the northern Rocky Mountain Front in Northwest Montana, where several inches of heavy wet snow can be expected for areas above 5000 ft. Strong winds, low humidity, and warm temperatures ahead of the front will contribute to critical fire weather conditions, prompting Red Flag Warnings across portions of southern Nevada, northern Arizona, southern Utah, southern Colorado, and northern New Mexico today. Unsettled, stormy weather is expected from the northern Plains to the Mid Atlantic over the next few days, with a series of upper disturbances bringing the threat for severe weather across the region. For today, isolated to scattered strong and severe thunderstorms are forecast for the northern and central Plains, with large hail, damaging winds, and a few tornadoes possible. Isolated severe storms, producing damaging winds and large hail, are also possible across portions of the lower Ohio Valley and the southern Mid Atlantic region. On Monday, scattered severe thunderstorms are expected to develop once again across portions of the northern Plains, and from partssof the Midwest into the Great Lakes and the Ohio Valley. Once again, these storms may produce large hail, damaging winds, and a few tornadoes. Pereira Graphics are available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php