Weather Alert in Colorado
Red Flag Warning issued February 16 at 1:45PM MST until February 17 at 8:00PM MST by NWS Goodland KS
AREAS AFFECTED: Yuma; Kit Carson County; Cheyenne; Cheyenne; Rawlins; Sherman; Wallace; Greeley; Dundy; Hitchcock
DESCRIPTION: For Tuesday, low relative humidity and sustained winds around 40 mph will lead to extreme fire spread for any fires that ignite. Southwest winds will change to west behind a cold front in the afternoon. Blowing dust may also occur near open fields or other source regions causing reductions in visibility and poor air quality. * AFFECTED AREA...THIS IS A PARTICULARLY DANGEROUS SITUATION FOR Fire Weather Zones 001 Cheyenne, 002 Rawlins, 013 Sherman, 027 Wallace, 041 Greeley, 079 Dundy, 080 Hitchcock, 252 Yuma, 253 Kit Carson and 254 Cheyenne. * TIMING...From 10 AM MST /11 AM CST/ to 8 PM MST /9 PM CST/ Tuesday. * WINDS...West 35 to 45 mph with gusts up to 65 mph. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Extremely dangerous and erratic fire behavior. Any fires that develop will rapidly grow and spread out of control.
INSTRUCTION: Comply with burn bans and regulations. Avoid driving on dry grass or brush. Maintain vehicle brakes and tires and secure tow chains to avoid dragging. Never toss lit cigarettes onto the ground. Evacuate if fire/smoke is heading your way, or if ordered to do so by local officials.
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Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
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