Weather Alert in Oregon
Fire Weather Watch issued July 15 at 1:59PM PDT until July 17 at 10:00PM PDT by NWS Pendleton OR
AREAS AFFECTED: John Day Valley; Southern Blue Mountains; Warm Springs Reservation
DESCRIPTION: ...DRY AND WINDY CONDITIONS EXPECTED ACROSS CENTRAL OREGON ON THURSDAY... .An upper level system is expected to pass through the region on Thursday. This, combined with warm and dry conditions, will have the potential to create critical fire weather conditions. The National Weather Service in Pendleton has issued a Fire Weather Watch for wind and low relative humidity, which is in effect from Thursday afternoon through Thursday evening. * AFFECTED AREA...Fire Weather Zones 696 John Day Valley, 698 Southern Blue Mountains and 703 Warm Springs Reservation. * TIMING...From Thursday afternoon through Thursday evening. * WINDS...Northwest 10 to 15 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended.
INSTRUCTION: A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.
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Weather Topic: What is Condensation?
Home - Education - Precipitation - Condensation
Next Topic: Contrails
Condensation is the process which creates clouds, and therefore
it is a crucial process in the water cycle.
Condensation is the change of matter from a state of gas into a state of liquid,
and it happens because water molecules release heat into the atmosphere and
become organized into a more closely packed structure, what we might see as
water droplets.
Water is always present in the air around us as a vapor, but it's too small for
us to see. When water undergoes the process of condensation it becomes organized
into visible water droplets. You've probably seen condensation happen before on the
surface of a cold drink!
Next Topic: Contrails
Weather Topic: What are Cumulonimbus Clouds?
Home - Education - Cloud Types - Cumulonimbus Clouds
Next Topic: Cumulus Clouds
The final form taken by a growing cumulus cloud is the
cumulonimbus cloud, which is very tall and dense.
The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although
most commonly they stop growing at an altitude of 6 km.
Even small cumulonimbus clouds appear very large in comparison to other cloud types.
They can signal the approach of stormy weather, such as thunderstorms or blizzards.
Next Topic: Cumulus Clouds
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