####018006014#### ACUS45 KWBC 131505 SCCNS5 Storm Summary Number 1 for Midwest to Northeast Winter Storm NWS Weather Prediction Center College Park MD 1100 AM EDT Mon Mar 13 2023 ...Heavy snow expected over the Northeast into Tuesday... Winter Storm Warnings are in effect for portions of the interior Northeast and coastal southern Maine. Winter Weather Advisories are in effect for portions of the Northeast, the north/central Appalachians, and areas downstream of Lake Superior and Lake Michigan. Winter Storm Watches are in effect for portions of southern Maine, southeastern Massachusetts, and the Lower Connecticut River Valley. Freeze Watches and Warnings are in effect for much of the interior Southeast, Tennessee River Valley, and Ozarks. For a detailed graphical depiction of the latest watches, warnings and advisories, please see www.weather.gov At 1000 AM EDT...A large upper-level trough was located over the Great Lakes region, resulting in two different, related low-pressure systems. A mature low-pressure system was located over central-southern Michigan with a minimum pressure of 1012 mb (29.88 in Hg). From this low, a stationary front extended through southern Ontario, separating cold, Arctic air in Canada from cool, continental air over the Great Lakes region and Upstate New York. A second energetic, rapidly-strengthening low-pressure system was located along the North Carolina coast with a minimum pressure of 1001 mb (29.55 in Hg). A short occlusion extended to the southeast of this low, with a cold front extending southwest along the Gulf Stream and a warm front extending toward the southeast over the open Atlantic. National Weather Service Radar and surface observations show a broad area of snow showers over the Great Lakes region associated with the low-pressure system over Michigan, with moderate to locally heavy snow falling over portions of southern and western Michigan toward the eastern Wisconsin coast. A separate area of lake-enhanced snowfall was observed over portions of Michigan's Upper Peninsula. Toward the east, light to moderate snow was falling over portions of western Pennsylvania, upstate New York, and portions of western New England. ...Selected preliminary Storm Total Snowfall in inches from 1000 AM EDT Sun Mar 12 through 1000 AM EDT Mon Mar 13... ...MICHIGAN... NEGAUNEE 5 NNE 7.5 ...WISCONSIN... DARBOY 1 W 12.8 WAUSAU 4 NE 12.4 WITTENBERG 12.3 FREMONT 1 W 12.0 MERILL 12.0 SOLON SPRINGS 12.0 SUPERIOR 1 SSW 10.5 SPRING VALLEY 10.3 ASHWAUBENON 9.9 ...Selected preliminary Storm Total Snowfall in inches where the event has ended... ...MINNESOTA... DULUTH 3 WNW 16.0 FINLAND 16.0 DULUTH 2 NNE 15.0 TWO HARBORS 4 WNW 15.0 HACKENSACK 14.0 MOOSE LAKE 2 SW 13.6 MCGRATH 8 ESE 13.5 MCGREGOR 5 S 13.5 PINE RIVER 13.0 PINE CITY 10 E 12.5 REDBY 3 NNE 12.0 SHEVLIN 12.0 ...NORTH DAKOTA... PORTLAND 12.0 BOTTINEAU 11.4 WALHALLA 4 SSE 10.9 GARRISON 9.0 FARGO 2 N 6.5 Conditions are generally forecast to improve over the Great Lakes region, as the southward-moving snow band will weaken along with its associated low-pressure system today. Additional snowfall will be light across this area. Meanwhile, conditions will deteriorate across the Northeast today. The upper-level trough is forecast to dive toward the East Coast, resulting in a rapidly-intensifying low-pressure system moving northeastward along the coastline. For portions of the interior Northeast, snowfall rates may reach upwards of 2+" per hour. For areas closer to the coast, including New York City and Boston, warm, onshore flow will initially keep temperatures mild enough for precipitation to fall as rain today. However, as the low approaches coastal New England, northwesterly flow will wrap cold temperatures around the western side of the low-pressure, resulting in the eventual changeover from rain to snow for many areas along the coast. Snowfall across the Northeast will be significant, especially over the interior Northeast. 8-16" of snow is expected across much of New England, with locally higher amounts in excess of 2 feet possible in the higher terrain. Along the coast, a potentially sharp gradient of snowfall is expected, with light snowfall totals forecast along the southern New England coast. Dangerous travel conditions are expected and scattered power outages are possible within areas of heavy snowfall. The next Storm Summary will be issued by the Weather Prediction Center at 1100 PM EDT. Please refer to your local National Weather Service office for additional information on this event. Genz $$