Weather Alert in Idaho
Red Flag Warning issued August 12 at 11:56AM MDT until August 13 at 10:00PM MDT by NWS Pocatello ID
AREAS AFFECTED: Sawtooth Range/Northern Sawtooth NF; Middle Snake River Valley/Twin Falls BLM north of the Snake River; Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River
DESCRIPTION: ...RED FLAG WARNING IN EFFECT FROM NOON TO 10 PM MDT WEDNESDAY FOR GUSTY WINDS, LOW RELATIVE HUMIDITY, AND ISOLATED THUNDERSTORMS FOR FIRE WEATHER ZONES 411, 413, 427, 475 AND 476... ...RED FLAG WARNING IN EFFECT FROM NOON TO 10 PM MDT WEDNESDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 410, 422 AND 425... ...RED FLAG WARNING IN EFFECT FROM NOON TO 10 PM MDT WEDNESDAY FOR GUSTY WINDS, LOW RELATIVE HUMIDITY, AND ISOLATED THUNDERSTORMS FOR FIRE WEATHER ZONE 427... The National Weather Service in Pocatello has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from noon to 10 PM MDT Wednesday. * AFFECTED AREA...Fire Weather Zone 422 Sawtooth Range/Northern Sawtooth NF, Fire Weather Zone 425 Middle Snake River Valley/Twin Falls BLM north of the Snake River and Fire Weather Zone 427 Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River. * WINDS...West 10 to 20 mph with gusts up to 35 mph. Isolated thunderstorms may produce gusts over 45 mph across Zone 427. * RELATIVE HUMIDITY...10 to 20 percent. * IMPACTS...The combination of dry fuels, gusty winds, low humidity and potential for lightning will lead to increasing fire spread and more extreme fire behavior.
INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies.
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Weather Topic: What is Evaporation?
Home - Education - Precipitation - Evaporation
Next Topic: Fog
Evaporation is the process which returns water from the earth
back to the atmosphere, and is another crucial process in the water cycle.
Evaporation is the transformation of liquid into gas, and it happens because
molecules are excited by the application of energy and turn into vapor.
In order for water to evaporate it has to be on the surface of a body of water.
Next Topic: Fog
Weather Topic: What are Fractus Clouds?
Home - Education - Cloud Types - Fractus Clouds
Next Topic: Freezing Rain
A fractus cloud (scud) is a fragmented, tattered cloud which has
likely been sheared off of another cloud. They are accessory clouds, meaning they
develop from parent clouds, and are named in a way which describes the original
cloud which contained them.
Fractus clouds which have originated from cumulus clouds are referred to as
cumulus fractus, while fractus clouds which have originated from stratus clouds
are referred to as stratus fractus. Under certain conditions a fractus cloud might
merge with another cloud, or develop into a cumulus cloud, but usually a
fractus cloud seen by itself will dissipate rapidly.
They are often observed on the leading and trailing edges of storm clouds,
and are a display of wind activity.
Next Topic: Freezing Rain
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