Weather Alert in Oregon
Red Flag Warning issued July 2 at 2:33PM MDT until July 3 at 9:00PM MDT by NWS Boise ID
AREAS AFFECTED: Burns BLM; Southern Grasslands
DESCRIPTION: ...RED FLAG WARNING FOR SCATTERED LIGHTNING TODAY AND TOMORROW... .Scattered thunderstorms will develop THIS afternoon and evening and AGAIN tomorrow afternoon and evening across southeast Oregon. Some of the storms will contain little rainfall, gusty outflow winds, and combined with hot temperatures and low humidity will lead to critical fire weather conditions. ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 8 PM PDT THURSDAY FOR LIGHTNING FOR BURNS BLM AND SOUTHERN GRASSLANDS...WHICH ARE FIRE WEATHER ZONES 670 AND 672... The National Weather Service in Boise has issued a Red Flag Warning for lightning, which is in effect from 2 PM to 8 PM PDT Thursday. * AFFECTED AREA...In Oregon, Fire Weather Zones 670 Burns BLM and 672 Southern Grasslands. * TIMING...For the first Red Flag Warning, until 11 PM PDT this evening. For the second Red Flag Warning, from 2 PM to 8 PM PDT Thursday. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. * THUNDERSTORMS...Scattered. * OUTFLOW WINDS...Isolated gusts up to 50 mph.
INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will occur shortly.
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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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