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US Weather Roundup Dec 30

By: associated pressNational Weather Summary
By: associated pressNational Weather Summary

National Weather Summary Dec 30

Cloudy skies continued to hang over much of the West today as a dirty ridge of high pressure remained situated over the region. Pockets of light, mixed wintry precipitation fell from the inland
regions of California and the Pacific Northwest through the
Intermountain West. Areas near the coast remained predominantly dry
while another Pacific disturbance approached the Coast.
To the east, an impulse of low pressure from the West trekked into the Southern Plains and pulled moisture from the Gulf Mexico into the eastern valleys. This flux of moisture and heightened
instability translated into widespread light to moderate showers
with areas of heavy rainfall from Louisiana through much of
Alabama. Persistent showers and heavy rainfall created threats of
local flooding across portions of these states through the
afternoon.
To the north, an Arctic wave of energy dropped down from Canada into the Northern Plains with a colder airmass and yielded to colder afternoon temperatures across the northern tier. This surge
of cold air mixed with moisture in the Ohio Valley and the Upper
Great Lakes to produce areas of light snowfall.
Elsewhere, high pressure over the Mid-Atlantic kept the Eastern Seaboard under dry conditions.

WEATHER EXTREMES:
HIGHEST TEMPERTURE (DEGREES F)...............77 Okeechobee, Fla.
HIGHEST HEAT INDEX (DEGREES F)..................84 Barking
Sands, Hawaii
LOWEST TEMPERTURE (DEGREES F)................-18 Mt. Washington, N.H.
LOWEST WIND CHILL (DEGREES F)...................-66 Mt.
Washington, N.H.
HIGHEST WIND GUST (MPH)..........................97 Mt.
Washington, N.H.
HIGHEST PRECIPITATION (INCHES)....................1.75 Oakdale, La.

ON THIS DATE....... The "Great World War I Cold Wave" swept through the East, plunging temperatures in cities below zero on
this date in 1917. Lows of -13 and -15 degrees were recorded at New
York City and Boston, respectively. West Virginia (-17 degrees) and
Tennessee (-32 degrees) record their coldest temperatures ever.


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