Alaska Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
755 PM EDT Sun May 30 2021
Valid 12Z Thu Jun 03 2021 - 12Z Mon Jun 07 2021
...Overview and Guidance Evaluation...
The weather pattern for the medium range period will be featured
with a trio of upper lows across the region on Thursday, with an
arctic low remaining nearly stationary across northwestern Alaska,
and the other two lows across the Aleutians and the Gulf region.
The two Pacific lows will likely consolidate into one low across
the Gulf region before weakening by the weekend. The pattern
looks to become less active across the southern portions of the
state by the weekend as an upper level ridge attempts to build in
across the Gulf and rain chances decrease. The WPC forecast was
primarily derived from a blend of the 12Z ECMWF/GFS/CMC/UKMET
through Friday, and then more of the ensemble means for Saturday
through Monday.
...Weather/Threats Highlights...
The persistent low pressure and onshore flow from the Alaska
Peninsula to the southeast panhandle region through the end of the
week is expected to produce multiple rounds of light to moderate
rainfall for coastal areas and nearby mountain ranges. Drier
conditions are expected to return by next weekend as the overall
weather pattern changes. Some showers can also be expected across
portions of the Interior, mainly on Thursday and Friday.
Temperatures are expected to reach the 60s across much of the
Interior for highs, and remaining quite chilly north of the Brooks
range where highs should remain in the 30s and 40s.
Hamrick
Additional 3-7 Day Hazard information can be found on the WPC
medium range hazards chart at:
https://www.wpc.ncep.noaa.gov/threats/threats.php
WPC medium range Alaskan products including 500mb, surface
fronts/pressures progs and sensible weather grids can also be
found at:
https://www.wpc.ncep.noaa.gov/alaska/ak_5dayfcst500_wbg.gif
https://www.wpc.ncep.noaa.gov/alaska/akmedr.shtml
https://www.wpc.ncep.noaa.gov/alaska/ak_5km_gridsbody.html