Historic Storm to Bring Damaging Winds and Heavy ......2019/11/26 · A “bomb” cyclone will...
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Historic Storm to Bring Damaging Winds and Heavy Mountain Snow www.weather.gov/mfr Monday, November 25, 2019 NWSMedford Prepared by: WFO Medford, OR The information contained within is time-sensitive. Do not use after 11:00 PM PST Tuesday. Disclaimer:
Transcript of Historic Storm to Bring Damaging Winds and Heavy ......2019/11/26 · A “bomb” cyclone will...
Historic Storm to Bring Damaging Winds and Heavy Mountain Snow
www.weather.gov/mfr
Monday, November 25, 2019
NWSMedford
Prepared by: WFO Medford, OR
The information contained within is time-sensitive. Do not use after 11:00 PM PST Tuesday.Disclaimer:
11/25/2019 10:08 PM www.weather.gov/mfr
Medford, ORWEATHER FORECAST OFFICE
Situation Overview
A “bomb” cyclone will bring DAMAGING WINDS and heavy snow to
southern Oregon and northern California.
Snow levels will start above 3000 feet today and then drop to 2000 feet
on Tuesday before falling to around 1000 feet on Wednesday morning.
Cold temperatures after Wednesday could create icy conditions on wet
roads.
Low Pressure System to Impact Tuesday Travel
11/25/2019 10:08 PM www.weather.gov/mfr
Medford, ORWEATHER FORECAST OFFICE
Situation OverviewLow Pressure System to Impact Tuesday Travel
11/25/2019 10:08 PM www.weather.gov/mfr
Medford, ORWEATHER FORECAST OFFICE
Situation OverviewLow pressure system to bring damaging winds and heavy low elevation snow
Hazard Impacts Location Timing
Heavy snow may make mountain passes
impassable at times. Occasional blizzard
conditions over the highest elevations.
Reduced visibilities elsewhere.
Increased potential for traffic accidents.
Mt. Shasta City area (including I-5)
All Mountain Passes
Mainly above 2500 feet (1500 feet
possible.)
BeginsTuesday around
10:00 AM through
Wednesday midday.
Hazard Impacts Location Timing
Widespread tree/structure damage and
power outages possible. Extreme travel
difficulties for high profile vehicles.
Unsecured objects will be blow away.
Most of southern Oregon and
northern California—especially at the
Coast and west of the Cascades
Tuesday morning through
Wednesday morning.
Hazard Impacts Location Timing
Cold temperatures after precipitation
ends could cause wet roads to become icy.
Most areas away from the coast. Wednesday, Thursday,
Friday
11/25/2019 10:08 PM www.weather.gov/mfr
Medford, ORWEATHER FORECAST OFFICE
Highlights:
High Wind Warning:
Coast, Rogue/Illinois Valleys,
Shasta Valley
Winter Storm Warning:
Cascades/Siskiyous above
2000 feet
Storm Warning: All
Coastal Waters
Winter Weather
Advisory: Entire east side
Situation OverviewHazard Map
11/25/2019 10:08 PM www.weather.gov/mfr
Medford, ORWEATHER FORECAST OFFICE
• Heaviest snow will occur Tuesday
afternoon and evening with
significant accumulations expected.
• Precipitation will become showery as
snow levels reach the valley floors.
• All passes will see periods of snow
on Tuesday and snow may fall down
to valley floors by Tuesday night.
Situation OverviewSnowfall amounts for southern Oregon and northern California.
11/25/2019 10:08 PM www.weather.gov/mfr
Medford, ORWEATHER FORECAST OFFICE
• Rainfall will be heavy at the coast and
coastal mountains
• However, rainfall will be more
beneficial than impactful
• No flooding expected
Situation OverviewRainfall amounts for southern Oregon and northern California.
11/25/2019 10:08 PM www.weather.gov/mfr
Medford, ORWEATHER FORECAST OFFICE
• Strong south to southeast winds
expected nearly everywhere.
• Strongest winds will occur:
– Tuesday afternoon at the coast.
– Along and west of the Cascades,
including valleys, Tuesday
afternoon and evening.
– Tuesday night east of the
Cascades.
Situation OverviewForecast wind gusts for southern Oregon and northern California.
11/25/2019 10:08 PM www.weather.gov/mfr
Medford, ORWEATHER FORECAST OFFICE
Marine ImpactsExtreme winds, seas, and surf
Storm force winds
expected, with
Hurricane Force gusts
likely.
Seas of 25 to 35 feet
likely, with breaking
waves in excess of 35
feet.
Several feet of storm
surge possible, but
low tide should lessen
impacts.
Sustained Winds 1 PM Sustained Winds 7 PM Peak Seas 10 PM
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Medford, ORWEATHER FORECAST OFFICE
Threat LevelsUpcoming Front with Rain.
Strong WindsSnow above
2500 ft.
Snow above
1500 ft.Heavy Rain
Incre
asi
ng T
hre
at
For our detailed hazards page, please go to
https://www.wrh.noaa.gov/map/
11/25/2019 10:08 PM www.weather.gov/mfr
Medford, ORWEATHER FORECAST OFFICE
Key Take-AwaysUpcoming Front with Rain
Confidence is High that damaging winds and heavy snow will impact southern Oregon and
northern California.
This will be a VERY DANGEROUS wind storm – especially at the coast – but strong winds are
expected to impact all locations at times Tuesday morning through evening.
Much colder air arrives Tuesday night into Wednesday, and valley floors could see some snow
accumulations . However, the greater threat to lower elevations is for any water on roadways to
freeze and cause dangerous travel conditions.
Heavy snow and near blizzard conditions at times will make travel very difficult to impossible over
the mountains. Travel through southwest Oregon and northern California is strongly discouraged.
Historic Storm to Bring Damaging Winds and Heavy Mountain Snow
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