Latest / EM Morning Brief / Navigating the Aftermath of the G4 Geomagnetic Storm

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Navigating the Aftermath of the G4 Geomagnetic Storm · EM Morning Brief

• 0:00
  Good
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  morning,
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  I'm
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  Cedric
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  and
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  this
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  is
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  your
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  EM
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  Morning
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  Brief
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  for
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  Wednesday,
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  November
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  12,
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  2025.
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  Overnight,
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  NOAA's
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  Space
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  Weather
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  Prediction
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  center
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  reported
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  a
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  severe
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  geomagnetic
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  storm
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  that
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  briefly
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  reached
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  G4
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  intensity.
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  High
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  latitude
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  regions
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  may
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  see
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  Aurora
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  again
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  and
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  experience
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  intermittent
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  HF
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  radio
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  and
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  GPS
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  issues
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  today.
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  No
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  tropical
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  cyclones
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  are
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  active
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  in
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  the
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  Atlantic
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  or
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  Pacific
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  and
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  the
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  National
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  Hurricane
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  center
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  has
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  no
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  areas
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  of
• 0:28
  concern.
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  The
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  Storm
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  Prediction
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  Center's
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  Day
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  one
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  outlook
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  carries
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  no
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  severe
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  thunderstorm
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  risk
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  for
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  the
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  US
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  with
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  only
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  isolated
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  non
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  severe
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  thunderstorms
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  possible
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  along
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  the
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  far
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  northern
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  California
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  coast
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  late
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  tonight.
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  Weather
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  wise,
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  the
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  bigger
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  safety
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  story
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  is
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  winter
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  lake
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  effect
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  snow
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  continues
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  to
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  taper
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  in
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  the
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  eastern
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  Great
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  Lakes
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  this
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  morning
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  while
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  early
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  season
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  mountain
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  snow
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  and
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  periodic
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  wind
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  are
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  on
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  tap
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  for
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  parts
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  of
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  the
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  west
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  and
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  Northwest
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  through
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  the
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  end
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  of
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  the
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  week.
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  USGS
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  shows
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  routine
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  small
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  earthquakes
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  in
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  Alaska
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  and
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  California
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  over
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  the
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  last
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  day.
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  None
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  rise
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  to
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  significant
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  status.
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  Let's
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  run
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  through
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  the
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  states.
• 1:07
  Alaska
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  High
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  latitude
• 1:09
  space
• 1:09
  weather
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  impacts
• 1:10
  are
• 1:10
  possible
• 1:10
  again
• 1:11
  today
• 1:11
  after
• 1:11
  last
• 1:11
  night's
• 1:12
  G4
• 1:12
  geomagnetic
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  storm.
• 1:14
  Expect
• 1:14
  potential
• 1:14
  GPS
• 1:15
  degradation,
• 1:16
  HF
• 1:17
  radio
• 1:17
  issues
• 1:17
  and
• 1:18
  Aurora
• 1:18
  visibility
• 1:19
  where
• 1:19
  skies
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  cooperate.
• 1:20
  Utilities
• 1:21
  and
• 1:21
  pipeline
• 1:22
  operators
• 1:22
  remain
• 1:23
  in
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  routine
• 1:23
  mitigation
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  posture.
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  Winter
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  Hazards
• 1:27
  Return
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  to
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  the
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  High
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  Country
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  NWS
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  keeps
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  winter
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  headlines
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  for
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  the
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  northern
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  Sierra
• 1:32
  and
• 1:32
  southern
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  Cascades
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  with
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  snow
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  above
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  6,500
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  to
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  7,500ft
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  from
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  late
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  tonight
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  into
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  Friday.
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  Michigan
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  lake
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  effect
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  snow
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  lingers
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  in
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  parts
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  of
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  northern
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  lower
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  Michigan
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  with
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  localized
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  2
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  to
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  4
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  inches
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  south
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  of
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  Grand
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  Traverse
• 1:47
  Bay
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  and
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  and
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  isolated
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  higher
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  totals
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  where
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  bands
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  persist.
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  New
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  York
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  Eastern
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  Lake
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  Ontario
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  region
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  remains
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  under
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  a
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  winter
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  weather
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  advisory
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  through
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  early
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  afternoon
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  with
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  1
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  to
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  3
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  inches
• 1:58
  of
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  additional
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  snow
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  in
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  persistent
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  bands,
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  greatest
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  on
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  the
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  Tug
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  Hill
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  and
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  into
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  Jefferson
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  County.
• 2:06
  Oregon.
• 2:06
  ODOT
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  trip
• 2:07
  check
• 2:07
  shows
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  carry
• 2:08
  chains
• 2:09
  or
• 2:09
  traction
• 2:09
  tires
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  at
• 2:10
  several
• 2:10
  Cascade
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  snowzone
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  segments
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  this
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  morning.
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  NOAA
• 2:13
  forecasts
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  point
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  to
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  increasing
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  precipitation
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  and
• 2:16
  lowering
• 2:16
  snow
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  levels
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  late
• 2:17
  tonight
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  into
• 2:18
  Thursday
• 2:18
  with
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  pass
• 2:19
  winds
• 2:19
  gusty
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  at
• 2:20
  times.
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  Washington
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  Winter
• 2:23
  headlines
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  continue
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  for
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  the
• 2:25
  Cascades.
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  A
• 2:26
  winter
• 2:26
  storm
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  warning
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  remains
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  in
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  effect
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  for
• 2:28
  portions
• 2:28
  of
• 2:29
  the
• 2:29
  North
• 2:29
  Cascades
• 2:30
  with
• 2:30
  additional
• 2:30
  heavy
• 2:31
  Snow
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  along
• 2:31
  Highway
• 2:32
  20
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  elsewhere.
• 2:33
  Expect
• 2:34
  periods
• 2:34
  of
• 2:34
  rain
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  changing
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  to
• 2:35
  rain
• 2:36
  snow
• 2:36
  in
• 2:36
  the
• 2:37
  passes
• 2:37
  late
• 2:37
  Thursday
• 2:38
  into
• 2:38
  Friday
• 2:39
  with
• 2:39
  light
• 2:39
  accumulations
• 2:40
  possible
• 2:41
  in
• 2:41
  wet
• 2:41
  slick
• 2:42
  pavement.
• 2:43
  All
• 2:44
  other
• 2:44
  states
• 2:44
  have
• 2:44
  no
• 2:45
  significant
• 2:45
  updates
• 2:46
  in
• 2:46
  the
• 2:46
  last
• 2:46
  24
• 2:47
  hours.
• 2:48
  We'll
• 2:49
  keep
• 2:49
  eyes
• 2:49
  on
• 2:49
  the
• 2:49
  geomagnetic
• 2:50
  storm
• 2:51
  impacts
• 2:51
  and
• 2:51
  evolving
• 2:52
  winter
• 2:52
  hazards
• 2:53
  in
• 2:53
  the
• 2:53
  west
• 2:53
  and
• 2:54
  Great
• 2:54
  Lakes.
• 2:55
  Stay
• 2:55
  safe.