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Colorado, Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet

Public Information Statement

Statement as of 3:55 PM MDT on April 17, 2014


... Strong straight line winds and large hail are major weather
threats in Colorado...

During this severe weather awareness week in Colorado... remember
that threats from thunderstorms include tornados... straight line
winds... hail... flooding... and lightning.

Tornados are often the headline story... but damaging straight line
winds can also injure and kill animals and humans. These winds are
usually caused by an area of air within a storm which is quickly
cooled by precipitation... or the evaporation of precipitation. This
area of cooled air... which is heavier than the surrounding
air... accelerates downward. As the cool air slams into the
ground... it spreads out from the area of impact. This process... in
extreme cases... can result in wind speeds exceeding 100 mph.
Weather forecasters call these winds microbursts if they are less
than 2 1/2 miles across and macrobursts if they are greater than 2
1/2 miles across.

These downbursts of cool air can be life threatening to pilots...
and can cause extensive damage... injuries... and deaths at ground
level. Try to get indoors during all storms... because high winds can
suddenly develop... causing things on the ground to become swiftly
moving missiles... that can injure or kill.

Hail often occurs in Colorado. Hail forms within storms as liquid
water freezes in the cold mid and upper levels of the storms. The
hailstones are kept aloft by strong updraft winds for a time... and
then Cascade to the ground. In Colorado... hailstones vary from pea
size... around 3/8 of an inch in diameter... to softball size... around
4 1/2 inches in diameter.

Hailstones can do tremendous damage to crops... either as large
hailstones... or as a large volume of small hailstones that
accumulate to a depth of several inches. Large hail damages
vehicles and buildings... and can be life threatening to animals and
people.

The National Weather Service issues severe thunderstorm warnings for
winds of 58 mph or higher or for large hail one inch in diameter or
larger. When you hear about a Severe Thunderstorm Warning... move to
shelter.

When thunderstorms threaten you this severe weather season... tune to
NOAA all hazards weather radio. Wherever you are during threatening
weather... plan out the actions you would take if severe weather were
to strike.

Tom magnuson
warning coordination meteorologist
National Weather Service Pueblo Colorado


Weather Severe Map
Alabama - Flood Warning , Coastal Hazard Statement, Flash Flood Watch , Flash Flood Watch , Areal Flood Watch , Record Report
Alaska - Record Report
Arkansas - Flood Warning , Flood Advisory , Record Report
California - Record Report
Colorado - Record Report , Public Information Statement
Connecticut - Flood Warning , Frost Advisory , Record Report
Delaware - Frost Advisory
Florida - Flood Warning , Coastal Hazard Statement, Flash Flood Watch , Flash Flood Watch , Areal Flood Watch , Areal Flood Watch, Coastal Hazard Statement , Record Report
Georgia - Flood Warning , Areal Flood Watch , Coastal Hazard Statement , Areal Flood Watch, Coastal Hazard Statement
Idaho - Wind Advisory
Illinois - Flood Warning , Public Information Statement
Indiana - Flood Warning , Public Information Statement
Iowa - Flood Warning , Public Information Statement
Kansas - Frost Advisory
Kentucky - Flood Warning
Louisiana - Flood Warning , Coastal Flood Advisory , Record Report
Maine - Areal Flood Warning , Areal Flood Warning , Flood Warning , Areal Flood Watch , Record Report
Maryland - Frost Advisory
Massachusetts - Flood Warning
Michigan - Flood Warning, Areal Flood Warning , Flood Warning , Flood Advisory , Record Report
Minnesota - Flood Warning , Record Report
Mississippi - Flood Warning , Coastal Flood Advisory , Record Report
Missouri - Flood Advisory , Record Report
Montana - High Wind Watch , High Wind Warning , Lake Wind Advisory
Nevada - Special Statement
New Hampshire - Flood Warning , Record Report
New Jersey - Frost Advisory , Record Report
New York - Flood Warning , Frost Advisory , Record Report
North Carolina - Frost Advisory , Record Report
North Dakota - Flood Warning
Oregon - High Surf Advisory , Wind Advisory
Pennsylvania - Frost Advisory , Record Report
South Carolina - Flood Warning , Coastal Hazard Statement , Coastal Flood Statement
Tennessee - Flood Advisory , Record Report
Texas - Flood Warning , Record Report
Vermont - Flood Warning , Record Report
Virginia - Frost Advisory , Record Report
Washington - Areal Flood Warning , Special Statement , Record Report
Wisconsin - Flood Warning , Record Report , Public Information Statement