Weather Alert in Idaho
Flash Flood Warning issued August 26 at 6:33PM MDT until August 26 at 9:30PM MDT by NWS Boise ID
AREAS AFFECTED: Ada, ID; Boise, ID; Elmore, ID
DESCRIPTION: FFWBOI The National Weather Service in Boise has issued a * Flash Flood Warning for... Northeastern Ada County in southwestern Idaho... Southwestern Boise County in southwestern Idaho... Northwestern Elmore County in southwestern Idaho... * Until 930 PM MDT. * At 633 PM MDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. An estimated 1.5 to 2 inches of rain have fallen since 530 PM MDT. Additional rainfall amounts of 1.0 to 1.5 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. Ponding of water on roadways is likely. * Some locations that will experience flash flooding include... Lucky Peak Spring Shores Marina, Lucky Peak Reservoir, Arrowrock Dam, Lucky Peak Dam and Arrowrock Reservoir. Idaho State Highway east of Boise is within the warned area. The Valley Fire Burn Scar is also within the warned area.
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Stay away from steep hillsides where rocks and mud may slide down onto the roads,
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Weather Topic: What is Graupel?
Home - Education - Precipitation - Graupel
Next Topic: Hail
Graupel is a form of precipitation that is created by atmospheric conditions
which cause supercooled water droplets to contact snow crystals and freeze to
their surface.
Sometimes known as soft hail or snow pellets, graupel is delicate and easily
destroyed by touch. Whereas hail usually falls during severe weather, graupel
doesn't require such conditions to form, and can form in mild precipitation
similar to situations which produce snowfall.
Next Topic: Hail
Weather Topic: What are Hole Punch Clouds?
Home - Education - Cloud Types - Hole Punch Clouds
Next Topic: Mammatus Clouds
A hole punch cloud is an unusual occurrence when a disk-shaped
hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.
When part of the cloud forms ice crystals, water droplets in the surrounding area
of the cloud evaporate. The effect of this process produces a large elliptical
gap in the cloud. The hole punch cloud formation is rare, but it is not specific
to any geographic area.
Other names which have been used to describe this phenomena include fallstreak hole,
skypunch, and cloud hole.
Next Topic: Mammatus Clouds
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