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Arkansas, Conway

Public Information Statement

Statement as of 6:00 AM CST on December 06, 2016


December 4th through the 9th is winter weather awareness week
in Arkansas. The purpose of this week is to remind people
what winter weather can bring, and how to deal with
hazardous winter conditions. Now is the time to prepare
for the upcoming winter season.

Todays topic is winter precipitation types.

Snow -- snow forms in the clouds and remains as snow all the way to
the ground. It most commonly takes the form of snowflakes, which
are the familiar six-sided ice crystals. It may also fall in the
from of snow pellets or snow grains.

Snow flurries are normally seen as a few snowflakes falling, although
visibilities can be reduced at times. In Arkansas, the term snow
flurries is used to indicate that no accumulation is expected.

Snow showers is a term not often used in Arkansas. Given this type
of precipitation, snow falls at varying rates, often changing
intensities over brief periods. Accumulation may occur, especially
during moderate to heavy snow showers.

Blowing snow refers to snow that is already on the ground and is
lifted into the air by the wind.

In Arkansas, heavier snows usually occur when cold air is already
in place over the state and a strong upper level low pressure
system moves out of the southwestern United States. The low serves
to pull moist air from the Gulf of Mexico northward into the cold
air. Light snow or snow flurries can also occur in the cold air that
follows the passage of an Arctic cold front.

Sleet -- sleet consists of pellets of ice. In fact, for people who
have trouble with the difference between sleet and freezing rain, it
may be easier to associate sleet with its technical name, which is
ice pellets. For sleet to form, snow begins falling from the clouds
but then GOES through a layer of above-freezing air thousands of
feet above the ground. This causes the snow to change to rain. Then,
the rain GOES through a layer of below-freezing air, usually at least
two to three thousand feet thick, and the precipitation turns into
pellets of ice.

Sleet typically occurs in a fairly narrow band between an area of
rain to the south and snow to the north. This band usually
moves as the temperature profile changes, but may remain nearly
stationary if temperatures fail to fluctuate. This often results
in accumulations of sleet.

Freezing rain -- this weather phenomenon is sometimes called glaze,
because of the glaze of ice that builds up on surfaces near the ground.
Freezing rain normally occurs when precipitation falls from the clouds
as snow, then GOES through an above-freezing layer, which turns the
precipitation to rain. Then, the rain reaches the ground where
temperatures are below freezing. The rain then freezes as it hits
exposed objects. In the worst cases, everything becomes coated with
a layer of ice.

In Arkansas, freezing rain commonly occurs as an Arctic high pressure
system begins to move away from the state. In this situation, cold
air is still lingering at the ground, but warmer southerly winds
from the Gulf of Mexico begin bringing moisture back over the top
of the cold air. Since the air at the ground has not warmed above
freezing, the rain that falls freezes on the ground and other objects.
Freezing rain, and its cousin freezing drizzle, often develop during
the late night hours, creating icy conditions for morning rush hour.

Freezing fog -- while this is not precipitation falling from the
clouds, it is another winter weather hazard. Freezing fog typically
develops on clear, calm nights when temperatures are below freezing.
Fog forms and freezes, usually on bridges, overpasses, and other
elevated roadways. The resulting thin layer of ice can create
quite a surprise for motorists due to the presence of clear skies
overhead.

Frost -- frost describes the formation of thin ice crystals on the
ground or other surfaces in the form of scales, Needles, feathers,
or fans. Frost forms when water vapor in the air turns directly
to ice crystals on an object. The temperature of the object must be
below freezing for frost to occur. However, frost is sometimes seen
on the ground when official temperatures are reported to be above
freezing. This is because the official temperature is taken about
five feet above the ground, where the air can be a few degrees
warmer than the temperature at ground level.

&&

Please visit our web site at www.Weather.Gov/lzk


Weather Severe Map
Alabama - Coastal Hazard Statement , Record Report
Alaska - Wind Chill Advisory , Winter Weather Advisory , Winter Storm Warning , Special Statement , Public Information Statement
Arkansas - Flood Warning , Hydrologic Statement , Public Information Statement
California - Wind Advisory , Winter Weather Advisory , Freeze Watch , Freeze Warning , Frost Advisory , Dense Fog Advisory, Freeze Watch , Dense Fog Advisory , Special Statement , Air Quality Alert
Colorado - Winter Weather Advisory , Avalanche Warning , Public Information Statement
Florida - Flood Warning , Coastal Hazard Statement , Record Report , Public Information Statement
Georgia - Areal Flood Warning , Record Report , Public Information Statement
Idaho - Winter Weather Advisory
Illinois - Dense Fog Advisory
Indiana - Record Report
Iowa - Dense Fog Advisory , Public Information Statement
Kansas - Public Information Statement
Louisiana - Flood Warning
Maine - Public Information Statement
Maryland - Winter Weather Advisory , Public Information Statement
Michigan - Lake Effect Snow Watch , Lake Effect Snow Advisory , Record Report
Minnesota - Wind Advisory , Winter Weather Advisory , Winter Storm Warning , Blizzard Warning, Winter Weather Advisory , Blizzard Warning, Winter Storm Warning , Record Report , Public Information Statement
Mississippi - Record Report
Montana - Wind Chill Advisory , Record Report
Nebraska - Winter Weather Advisory , Public Information Statement
Nevada - Special Statement
New Hampshire - Public Information Statement
New Jersey - Winter Weather Advisory
New Mexico - Special Statement
New York - Lake Effect Snow Watch , Winter Weather Advisory , Public Information Statement
North Carolina - Public Information Statement
North Dakota - Wind Chill Advisory , Blizzard Warning , Winter Weather Advisory
Ohio - Record Report , Public Information Statement
Oregon - Winter Weather Advisory , Winter Storm Warning, Winter Weather Advisory , Winter Storm Warning, Winter Weather Advisory, Freeze Warning , Winter Storm Warning, Winter Weather Advisory, Freeze Warning, Frost Advisory , Frost Advisory
Pennsylvania - Winter Weather Advisory , Public Information Statement
Puerto Rico - Coastal Hazard Statement
South Carolina - Record Report , Public Information Statement
South Dakota - Wind Advisory , Winter Weather Advisory , Public Information Statement
Tennessee - Flash Flood Watch , Wind Advisory
Texas - Flood Warning , Special Statement , Record Report
Virgin Islands - Coastal Hazard Statement
Virginia - Winter Weather Advisory , Special Statement , Public Information Statement
Washington - Winter Weather Advisory , Winter Storm Warning
West Virginia - Winter Weather Advisory , Freezing Rain Advisory , Special Statement , Public Information Statement
Wisconsin - Lake Effect Snow Watch , Dense Fog Advisory , Special Statement , Record Report , Public Information Statement
Wyoming - Winter Weather Advisory , Special Statement , Record Report

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