textproduct: Anchorage

LONG TERM FORECAST (Days 4 through 7: Friday through Monday)

No change from previous Long Term discussion...

Longwave trough remains in place over the Mainland through the end of this week. Multiple waves of moisture moving through Southwest and Southcentral Alaska will provide periods of light to moderate rainfall during this time. Utilizing an ensemble mean forecast model approach mitigates the outlier differences while keeping this long range forecast trend.

Southcentral: Waves of moisture move through the Gulf bringing periods of locally moderate rainfall to Prince William Sound, Kodiak Island and Eastern Kenai Peninsula through Saturday. Persistent southerly to southwesterly flow will provide the conditions for stronger waves of moisture to track inland to the Copper River Basin, Anchorage Bowl and Mat-Su Valleys. This flow will also result in seasonally cooler pattern from increased cloud cover and cooler temperatures.

Southwest: With the trough firmly in place, multiple low pressure systems will move through the Bering Sea. Periods of light to moderate rain are expected from the Aleutians to the Alaska Peninsula through Friday. These conditions reach the Mainland by Saturday keeping the pattern of seasonally cool temperatures and cloud cover through this upcoming weekend.

-Johnston/DD

AVIATION

PANC...Isolated rain showers will persist into the late afternoon over the terminal before a more robust round of rain moves in this evening. MVFR conditions overnight through Wednesday can be expected during this second round of steady rain. Turnagain Arm winds will continue to bend into the terminal this afternoon through late afternoon Tuesday with gusts reaching as high as 30 kts.

-Johnston