Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 255 PM EST Mon Feb 24 2025 Valid 00Z Tue Feb 25 2025 - 00Z Thu Feb 27 2025 ...Atmospheric River continues to bring heavy rain, gusty winds, and scattered instances of flooding to the Northwest today... ...Showers and thunderstorms with locally heavy rainfall forecast for the Florida Peninsula today... ...Temperatures continue to slowly moderate across the southern U.S. as most of the country sees a period of above average, milder temperatures... Portions of the Pacific Northwest and into the northern Great Basin and Rockies are receiving heavy rainfall and gusty winds that keep the threat for areas of flooding today as the active Pacific storm track/Atmospheric River persists. Snow levels are expected to remain high with mild temperatures in place which will allow for strong upslope flow along the Olympics, Coastal Ranges, and Cascades with heavy rainfall expected. WPC has a Slight Risk of Excessive Rainfall (level 2/4) in effect today for portions of the region as additional rainfall on top of already saturated grounds may lead to some scattered instances of flooding. The system will continue its eastward track Monday night; which will spread additional rainfall to the northern Great Basin and Rockies. Snow levels will fall behind the passage of a cold front and some snow may mix in for lower valley elevations into Monday night, though little to no accumulations are expected. High mountain elevations will see heavy snow, particularly the the northern Cascades and ranges of the northern Rockies. Very strong winds with gusts upwards of 60 mph are also expected throughout the region through Monday night. Conditions will finally start to dry out following the passage of this system with some lingering lighter and more scattered showers Tuesday. Locally very heavy downpours are expected and some isolated flash flooding will be possible for urban areas of South Florida this afternoon and into Tuesday morning as very moist Gulf air flowing northward over the Florida Peninsula ahead of a low pressure system. The areal extend of thunderstorms will decrease as the system progresses further east over the Atlantic Ocean. Elsewhere, a pair of quick moving upper-level shortwaves will bring some light isolated to scattered rain/snow showers from the Northern Plains east through the Great Lakes into the interior Northeast the next couple of days. As the Arctic air erodes temperatures across much of the central and southeast states will moderate to near or just above seasonal averages. Daily highs should reach the upper 50s to mid-60s for most locations. The entire Southeast will be above average by Tuesday as highs rise into the mid-60s to low 70s. A warm-up will also continue for the East Coast as highs rise into the 40s for New England and the northern Mid-Atlantic and the 50s and 60s for the southern Mid-Atlantic and Carolinas. For the central and western states daily temperatures will average 10-15 degrees warmer under a broad upper ridge. Highs are forecast from the 40s and 50s in the Midwest, the 50s and 60s for the Great Basin and northern/central Plains, the 60s and 70s for California and the southern Plains, and the 80s for the Desert Southwest. One exception will be in the Northwest where average highs in the 40s and 50s are forecast following a cold front passage. Campbell/Putnam Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php