Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 256 PM EDT Tue Apr 16 2024 Valid 00Z Wed Apr 17 2024 - 00Z Fri Apr 19 2024 ...Severe weather and isolated flash flooding for the Lower Great Lakes/Ohio Valley Wednesday... ...Moderate to locally heavy mountain snowfall for the northern Rockies... ...Warm temperatures in the South and Desert Southwest; chillier weather for the Upper Great Lakes and northern Rockies... A storm system over the central Plains this evening will continue northeastward into the Great Lakes region by tomorrow afternoon, with an area of rain and some thunderstorms along its path across the Corn Belt southward to the Ozarks tonight into early Wednesday. By tomorrow, the front will continue eastward and afternoon thunderstorms are again possible ahead of the cold front over parts of the Midwest. Temperatures will be mild ahead of the cold front across the Ohio Valley, reaching into the 70s (north) to 80s farther south across the Lower Mississippi Valley. Lighter rain is expected farther north toward the Canadian border, amidst cooler temperatures in the 50s/60s, as well as into the Mid-Atlantic and Northeast as the system starts to weaken. Farther west, colder temperatures behind another cold front moving out of eastern Montana will support snow over much of the northern Rockies and into the foothill locations, especially over northern Wyoming. Snow will continue across western Montana tonight and slowly taper off on Wednesday as the system exits the mountains, but will start to bring some rain to the central Plains starting early Thursday. For the Southwest, warmer temperatures into the 80s/90s will be common tomorrow under fair conditions. Into south Texas, temperatures may again climb well into the 90s to near 100F as the southern end of the frontal boundary starts to dissipate. Fracasso Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php