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Several waves of low pressure drove a mixture of rain and snow across the West Coast and the Intermountain West on Thursday, while a cold frontal boundary extended from the Plains to the Northeast.

An onshore flow from the Pacific drove wet weather across parts of the Pacific Northwest on Thursday. Areas of Washington and Oregon experienced showers, while a mixture of rain and snow moved across the Cascades and northern Rockies. Similar conditions pushed across the Great Basin and the central Rockies due to low pressure over the region. Parts of the Southwest experienced rain during the early morning, as Blue Canyon, Calif., reported a midday total of 1.00 inches of rain, while Santa Monica, Calif., reported a midday total of 0.94 inches of rain.

Meanwhile, a cold frontal boundary extended across the Plains, the Midwest, the Mid-Atlantic and the Northeast on Thursday. Cold, arctic air swept across the central and eastern thirds of the country, as wind chill advisories were issued in a handful of states. Crane Lake, Minn., recorded a morning low of -36 degrees, while International Falls, Minn., recorded a morning low of -33 degrees. Conditions were mostly sunny from the southern Plains to the Southeast due to high pressure across the area.

THURSDAY'S WEATHER EXTREMES:

HIGHEST TEMPERATURE (DEGREES F).........................80 Marathon, Fla.

HIGHEST HEAT INDEX (DEGREES F)..........................84 Homestead AFB, Fla.

LOWEST TEMPERATURE (DEGREES F)..........................-36 Crane Lake, Minn.

LOWEST WIND CHILL (DEGREES F)...........................-49 Hibbing, Minn.

HIGHEST WIND GUST (MPH).................................60 Sand Island, Henderson Field, Hawaii

HIGHEST PRECIPITATION (INCHES)..........................1.12 Blue Canyon, Calif.

ON THIS DATE....... What is perhaps the greatest snowstorm in New England history started on this date in 1717 as the area received as much as six feet of new snow in a four day snowstorm. Boston received three feet of snow and snowdrifts covered many one-story houses.

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