textproduct: Seattle/Tacoma

SYNOPSIS

Dry and stable weather through early next week with high pressure over the region.

SHORT TERM /TODAY THROUGH SATURDAY/

Strong high pressure remains anchored over the Pac NW leading to dry and stable weather across western WA. Poor mixing will lead to low clouds trapped near the surface with only partial burnoff during the afternoon. In the mountains, above the inversion, expect plenty of sunshine. High temperatures will range in the 40s to near 50. Lows will trend cooler and in the 30s Friday through the weekend, with temps near freezing over the south sound. 33

LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/

High pressure will continue to bring dry and stable weather heading toward the middle of next week. Very good agreement in the ensemble members for high confidence. Lows will remain chilly and in the 30s each morning. 33

AVIATION

A mix of low stratus and pockets of fog early this morning. LIFR conditions in fog have developed from PAE northwards and the Strait of Juan de Fuca. MVFR in low stratus for terminals outside of fog. In addition to the low stratus, NE winds 5-8 kt should hinder fog formation at these terminals. Ceilings will continue a downward trend this morning, with IFR conditions expected after 12Z. Improvement into VFR after 20Z-22Z for all terminals. NE winds will continue to increase throughout the morning and afternoon to 8-12 kt.

Clear skies and light to calm winds may create more favorable conditions for fog development Thursday night. Current probabilities for LIFR conditions in fog are between 20-30%.

KSEA...IFR conditions at the terminal with low stratus early this morning. Expecting the combination of low stratus and NE winds to prevent fog developing at the terminal. Ceilings are expected to improve later this afternoon to VFR. NE winds today 8-13 kt.

There is some uncertainty whether Thursday night will bring another low stratus event or fog. While skies look to remain mostly clear, elevated NE winds may hinder fog development.

29

MARINE

Offshore flow through Friday with highest wind and waves through the central/western Strait of Juan de Fuca - a Small Craft Advisory is in effect. Offshore flow eases over the weekend with generally light winds over the waters.

HYDROLOGY

No river flooding is expected over the next 7 days.

SEW WATCHES/WARNINGS/ADVISORIES

WA...None. PZ...Small Craft Advisory from 10 AM this morning to 10 AM PST Friday for Central U.S. Waters Strait Of Juan De Fuca- West Entrance U.S. Waters Strait Of Juan De Fuca.