Weather Alert in Nebraska
Red Flag Warning issued March 20 at 2:42PM CDT until March 22 at 4:00AM CDT by NWS North Platte NE
AREAS AFFECTED: Eastern Panhandle/Crescent Lake NWR; Sandhills/Valentine NWR/Nebraska National Forest; Niobrara Valley/Fort Niobrara NWR/Samuel R McKelvie National Forest; Loup Rivers Basin; Frenchman Basin; Loess Plains
DESCRIPTION: ...CRITICAL FIRE WEATHER CONDITIONS SATURDAY INTO THE OVERNIGHT SATURDAY NIGHT... .Record high temperatures Saturday in the 90s will lead to single digit relative humidity Saturday afternoon across the area. Low relative humidity will combine with gusty westerly winds to 35 MPH Saturday afternoon, producing critical fire weather conditions. An abrupt change in wind direction to the north will commence late Saturday evening across northern Nebraska, transitioning south into the overnight. Winds with this shift in wind direction will reach up to 45 MPH overnight. * AFFECTED AREA...Fire Weather Zone 204 Eastern Panhandle/Crescent Lake NWR, Fire Weather Zone 206 Sandhills/Valentine NWR/Nebraska National Forest, Fire Weather Zone 208 Niobrara Valley/Fort Niobrara NWR/Samuel R McKelvie National Forest, Fire Weather Zone 209 Loup Rivers Basin, Fire Weather Zone 210 Frenchman Basin and Fire Weather Zone 219 Loess Plains. * TIMING...Red Flag Warning in effect from 10 AM CDT (9 AM MDT) Saturday through 4 AM CDT (3 AM MDT) Sunday morning. * WINDS...West 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...6 to 12. * TEMPERATURES...Up to 97. * LIGHTNING...None expected. * IMPACTS...Any fire starts will spread rapidly and will be difficult to control. * ADDITIONAL DETAILS...A sharp frontal boundary will arrive from the north late Saturday evening, producing an abrupt wind shift and gusts up to 45 mph during the late evening and overnight hours.
INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.
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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
Weather Topic: What are Stratocumulus Clouds?
Home - Education - Cloud Types - Stratocumulus Clouds
Next Topic: Stratus Clouds
Stratocumulus clouds are similar to altocumulus clouds in their
fluffy appearance, but have a slightly darker shade due to their additional mass.
A good way to distinguish the two cloud types is to hold your hand out and measure
the size of an individual cloud; if it is the size of your thumb it is generally
an altocumulus cloud, if it is the size of your hand it is generally a
stratocumulus cloud.
It is uncommon for stratocumulus clouds to produce precipitation, but if they do
it is usually a light rain or snow.
Next Topic: Stratus Clouds
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