textproduct: Seattle/Tacoma

SYNOPSIS

Warm and dry conditions as an upper level ridge builds over the area. Dry flow aloft will continue through the weekend with warm and dry conditions expected into the first half of next week.

SHORT TERM /TONIGHT THROUGH SUNDAY NIGHT/

Upper level ridge building offshore continues to lead to a mix of sun and high level clouds this afternoon. Temperatures warming into the low 60s with dry northerly flow aloft. High clouds will clear out tonight with temperatures cooling down to the low to mid 30s. A Frost Advisory will remain in affect for portions of the Southwest Interior and South Puget Sound for overnight temperatures near freezing.

Little change of the pattern over the weekend as we will remain in dry northerly flow across western Washington with warm and dry conditions. High temperatures over the weekend will warm in the mid to upper 60s in the interior locations, with areas along the water in the upper 50s into lower 60s.

LONG TERM /MONDAY THROUGH FRIDAY/

Ensemble guidance continues to agree in a weak shortwave passing over the area on Monday with an increase in cloud cover along with the potential for some showers over the Cascades. Most of the interior will remain dry throughout the week and temperatures will slightly warm to the lower 70s by midweek. Overnight lows remain in the upper 30s and mid 40s.

Mazurkiewicz

AVIATION

North flow aloft continues with a ridge offshore and a trough to the east. The flow will turn northeast Saturday. VFR skies continue this afternoon with FEW/SCT mid-height clouds. Breezy north winds 8-12 kt gusting to 20 kt will continue through the evening, with some spots becoming calm or light northeast overnight. A slight chance of low CIGS and/or fog/mist (some of which may be freezing) remains Saturday morning, with the best chance in the south interior/Pacific Coast. More VFR conditions are expected going into the day Saturday. Winds pick up during the day out of the north 5-10 kt.

KSEA...VFR expected through the TAF period. Threat of low cigs/vis remains very low going into Saturday morning (but can't be ruled out within the vicinity of the terminal). North winds this afternoon at 8-12 kt gusting to 20 kt decrease to around 5 kt from the northeast tonight, returning to the north 5-10 kt Saturday.

HPR

MARINE

High pressure will remain offshore with lower pressure inland. North flow will continue over the waters with this pattern, with the winds offshore at times. Couple north interior/Strait of Juan de Fuca spots this afternoon may see a couple gusts to 20 kt. Otherwise the winds largely remain light, with the potential for a weak diurnal push through the strait Monday. Seas will remain in the 4-8 ft range.

HPR

HYDROLOGY

No river flooding in the next 7 days.

SEW WATCHES/WARNINGS/ADVISORIES

WA...Frost Advisory from 11 PM this evening to 10 AM PDT Saturday for Lowlands of Lewis and Southern Thurston Counties- Lowlands of Pierce and Southern King Counties-Olympia and Southern Puget Sound-Southern Hood Canal.

PZ...None.