Alaska Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
208 PM EDT Sun Apr 21 2019
Valid 12Z Thu Apr 25 2019 - 12Z Mon Apr 29 2019
...Guidance/Predictability Assessment and Weather Highlights...
The weather pattern is not very active over the next week with
main storm tracks well south and well west of the state. Moderate
surface low developments over the northern Gulf of Alaska will
support modest periods of precipitation inland into
southern/southeastern Alaska as enhanced over favored coastal
terrain. These lows will be supported by a mean Gulf of Alaska
upper closed low/trough.
The WPC Alaskan medium range product suite was mainly derived from
a blend of the 00 UTC ECMWF ensemble mean and to a lesser extent
the compatable 00 UTC ECMWF. This blend maintains good WPC
continuity and offers detail consistent with a pattern with
slightly below normal overall predictability. Recent GFS/GEFS runs
have not offered stellar continuity, but latest 12 UTC GFS/GEFS
runs have trended from outlier solutions to at least more in line
with that preferred by WPC.
Bullet points from the WPC Days 3-7 Hazards chart can be found at:
WPC medium range Alaskan products including 500mb, surface
fronts/pressures progs and sensible weather grids can also be