The National Weather Service (NWS) has issued a frost warning until 9:00 a.m. CST for much of south-central Texas, except for areas near the Rio Grande. Temperatures dropped near or below freezing early Tuesday, with the Hill Country experiencing widespread overnight freezes.
In its advisory, the NWS urged residents to take precautions when temperatures drop to around 30°F, noting:
“Remember to protect the 4 P’s: People, Pets, Plants and Pipes!”
NWS: heavy rain days for Washington, Oregon
A long atmospheric river will deliver several days of heavy rainfall to western Washington and northwestern Oregon on Tuesday and Wednesday, according to the National Weather Service. Radar and surface observations show continued heavy rain with a risk of flash flooding in coastal areas and the Cascades where a Flood Watch remains in effect.
More than a foot of new snow is likely in the northern Rockies, especially northwestern Wyoming.
Gusty winds are expected in the Pacific Northwest, northern Rockies, and northern Plains.
Arctic cold in the east
By early Tuesday morning, an arctic air mass behind the departing coastal low will send temperatures into the teens as far south as North Carolina, threatening record lows in the mid-Atlantic interior and southern New England.
The first Clipper will arrive on Tuesday
The first of a series of Alberta clipper systems descends from southwestern Canada into the Northern Plains on Tuesday, spreading:
The first cut this week in Alberta will bring a band of light to locally heavy snow from the northeast corner of North Dakota across the Great Lakes on Tuesday, the NWS said. Snowfall totals of 4-8 inches are likely to remain along the northern edge of the storm track.
AccuWeather forecasters report that snow will spread into the Great Lakes region Tuesday night, with a mix of rain, snow and ice expected near and south of the storm’s center.
Slick conditions for travel across the Dakotas, Minnesota, Wisconsin and into the Great Lakes Tuesday night
Snowfall totals from this system are expected to reach 3-6 inches from northern North Dakota through northern New York and Vermont.
Stronger Clipper takes over Tuesday through Wednesday
A more powerful clipper will quickly intensify as it moves into the northern plains on Tuesday evening, bringing:
A stronger, rapidly intensifying clipper will track east across the Northern Plains and into the Great Lakes by Wednesday. The NWS is warning that the storm will rapidly intensify, producing very strong winds and widespread snowfall.
-3-6 inches of snow from northern North Dakota to far northern New York and Vermont
-6-12 inches across parts of Wisconsin, Michigan and southern Ontario
– Local StormMax 15 inches in the heaviest bands
-The amount of snow will depend on the exact track. If the low moves directly over Chicago, Detroit could remain on the low end of its forecast of 1-2 inches, AccuWeather said.
– Light to heavy snow from eastern Dakota into Minnesota, Wisconsin and Michigan
-4-8 inches of snow from northeastern North Dakota through the central Great Lakes, according to NWS estimates
-Up to 6-12 inches in parts of Wisconsin, Michigan and southern Ontario where AccuWeather Local StormMax may reach 15 inches
-By Wednesday morning, the storm will move into the lower Great Lakes and spread snow into northern New England and the interior Northeast.
Dangerous winds in the northern USA
Both shears will generate widespread strong winds:
-40-50 mph gusts from Montana and Wyoming into Illinois and Wisconsin
Gusts of -70 mph possible in higher elevations of Montana and Wyoming
– AccuWeather Local StormMax 100 mph from eastern Montana to South Dakota
-Winds gusting to 50 mph push into the Ohio Valley and northeast Wednesday
Northeast: Rain, snow and wind Wednesday
By Wednesday, the ripening clipper will expand:
-Snow from Michigan, southern Ontario, Quebec and northern New England
-Late day rain moves further south across the Ohio Valley and into the northern Mid-Atlantic
– Strong winds throughout the region
