temperatures are really extreme, in many cases exceeding what you'd normally see
at the peak of the summer. Grandfather Mountain, NC hit 80 yesterday (update,
they hit it again today) -
their warmest ever in April and only 3 degrees away from their all-time record
high (for any month)! High temperatures yesterday and today are in the 90s as
far north as Pennsylvania and New
York City; at Central Park
they broke their daily record set in 1929. Below is a temperature map from this
time yesterday afternoon; today the mid-Atlantic are far above those anywhere
else in the U.S..
in the position of the jet stream between Iceland and northern Europe will only
be subtle over the next few days, but will still cause variations in where the
ash plume from a volcano erupting in Iceland will spread over Europe.
of airline passengers will continue facing flight delays and cancellations as a
Path of Ash Plume through Tuesday
the jet stream, which is an area of relatively strong winds concentrated within
a narrow stream in the atmosphere extending from 10,000 to 40,000 feet above the
ground, that is controlling where the ash is spreading.
like a spray can of ash coming from Iceland," AccuWeather.com Senior
Meteorologist Margusity said. "The ash comes out of the volcano nozzle and
spreads out into the atmosphere just like a spray can works."
with a spray can, the plume of ash is not uniform. It becomes deformed and
spreads out in different directions the farther away from the source it gets.
no current satellite imagery was available Saturday morning, imagery from Friday
showed the main plume of ash still spanning from Iceland over the northern
portion of the U.K. and into southern Scandinavia.
the plume started getting deformed, an ash cloud has also spread and formed over
the northern Europe mainland, as seen on satellite imagery from Friday.
jet stream is expected to maintain a general position that spans from Iceland
over the northern U.K. and southern Scandinavia through Sunday and shift only
slightly northward Monday. The main, concentrated ash plume is expected to be
collocated for the most part.
a separate ash cloud that has spread from the main plume and formed over the
northern mainland of Europe is located south of the jet stream in an area of
weak wind flow. Due to this lack of strong winds, AccuWeather.com meteorologists
expect little movement or dissipation of this cloud through Monday.
jet stream, or steering flow, is depicted by the purple lines and will maintain
this general position with slight variations through Wednesday of next week.
into Wednesday, the jet stream is expected to shift farther south, becoming
oriented from Iceland into the northern U.K. and northern Germany.
Correspondingly, the main ash plume is expected to follow this trajectory and
have the greatest impact on air travel in these areas. This of course is
assuming the volcano continues to erupt through then.
the volcano does continue erupting, the plume is also expected to become more
concentrated Tuesday into Wednesday, posing a greater threat to air travel. At
the same time, however, the plume is also expected to become narrower, impacting
a smaller area.
shift of the jet stream farther south Tuesday into Wednesday could be good news
for the rest of the northern mainland of Europe. The southward shift is expected
to increase winds over the region, perhaps helping to stir up and clean out the
ash cloud currently in place.
Beneficial Changes Forecast for Thursday
to AccuWeather.com Meteorologist Rob Miller, a big change in the jet stream
pattern will occur Thursday as a storm develops in the central Atlantic Ocean.
this storm develops, the jet stream is expected to shift south of Iceland and
become oriented out of the west-southwest rather than the northwest.
southwest jet stream should help clean any remaining ash plume out of most of
Europe and bring some relief for the aviation crisis, according to
Plume's Impacts on Travel
of flights have been cancelled on a daily basis across Europe since Thursday.
According to BBC News, nearly all of Europe's major airports remained closed
U.K.'s Civil Aviation Authority has extended its restriction of most
non-emergency flights in U.K.-controlled airspace until at least 7 a.m. local
time on Sunday.
in Poland are worried that air travel will remain suspended for Sunday's state
funeral of President Lech Kaczynski and his wife Maria. Leaders from around the
world are expecting to fly into the southern city of Krakow for the ceremony.
authorities in Scandinavia and most of northern Europe have also restricted air
grounding of flights in reaction to this threat is creating nightmares for
airline passengers across Europe and around the world.
than impairing visibility, the real threat with this volcano is ash possibly
affecting airplane engines and control systems.