textproduct: Juneau

SYNOPSIS

Key Messages:

- Clearing skies across the interior with widespread dry conditions persisting through the weekend, high temperatures into the 70s expected. Get outside and enjoy!

- Increasing forecast confidence of another round of warm temperatures early next week, especially across the southern panhandle.

LONG TERM.../Tuesday through Friday/

Following a particularly warm Monday, Tuesday is expected to be slightly cooler due to the small increase in cloud cover and upper level winds to be directed more off shore, bringing cooler air in off the water rather than warm air off of the interior. Through the week, temperatures are then expected to trend downward towards high 50s and 60s across the panhandle. A weak frontal system looks to move across the north gulf coast through the day Tuesday. This is expected to bring rain to Yakutat and possibly outer coastal communities in the northern panhandle. This system is not expected rain to Juneau and other interior communities, but there is a possibility for increased cloud cover as the front moves through the area. Some models are indicating some precipitation across the northern panhandle on Wednesday, but this could be due to several factors like a more prevalent marine layer, or terrain influenced showers. The central and southern panhandle are expected to remain dry with mostly sunny skies through Wednesday before a more organized low center and associated frontal system moves across the northern gulf, bringing increased rain chances across the panhandle for the end of the week.

AVIATION.../Through 12z Monday/

A marine layer is slowly attempting to move inland, but ceilings have generally remained in the MVFR or VFR category. Brief reductions to IFR are still possible, with the best chance at PAGS, PASI, and PAKW before about 16Z. While some cloudiness will linger, widespread VFR is expected by 20Z across much of the region. As a ridge slowly moves eastward across the Gulf, onshore flow will persist. But, as breaks in cloud cover become more common this afternoon, sea breeze circulations will develop. Surface winds are expected to remain generally 10kt or less, but some gusty winds are expected at PAGY and the Lynn Canal.

MARINE

Outer Waters: Rinse and repeat of yesterday, with a high amplitude surface ridge anchored around Cape Spencer, generating relatively strong northwesterly winds for Cape Edgecombe and southward. To the west, a weak front pushing eastward will shift winds in the NE gulf coast south to southeasterly briefly on Monday, before the ridge strengthening once again Tuesday into Wednesday, bringing broad northwesterlies up to 25 knots.

Inner Waters: Predominantly westerly winds with split flow across all of the inner channels. To the north, southerly winds increase from thermally driven gradients between the SE AK waters and warm Canadian land. Similarly in the south for Clarence Strait, with northwesterlies persisting for the next few days up to 20 knots. Not expecting as high as 25 knot westerlies for Icy Strait today, as thermally driven troughing in Canada does not have the additional dynamical support to bring up pressure gradients across the Coast Mountains. Therefore, kept wind speeds capped at around 20 knots.

AJK WATCHES/WARNINGS/ADVISORIES

PUBLIC...None. MARINE...None.