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Prognostic Meteorological Discussion (PMD)

Issued by National Weather Service (NWS)

                            
000
FXAK02 KWNH 182006
PMDAK 

Alaska Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
405 PM EDT Wed Sep 18 2019

Valid 12Z Sun Sep 22 2019 - 12Z Thu Sep 26 2019

Model guidance and the ensemble means are in fairly decent
agreement with maintaining a longwave trough from the Bering Sea
to the Mainland through much of the extended periods, hinting that
some ridging may develop near the Canadian border by the end of
the forecast. This supports a series of low pressure systems will
move across the Aleutians and parts of the Mainland this weekend
and into the coming week. This will favor a wet pattern with near
normal temperatures for far northern and southern portions of the
state. Locally heavy rain will be possible along the coast from
the eastern Kenai to Yakutat.

Campbell

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

Hazards:
- Heavy rain across portions of the Alaska Panhandle, Sat, Sep 21
and Mon-Tue, Sep 23-Sep 24.
- High winds across portions of southern Alaska, Sat, Sep 21.

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



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