Marine Weather and Tide Forecast for Leavenworth, WA

SYNOPSIS
Temperatures will trend warmer for the remainder of the week with highs in the 60s today with widespread 70s by Thursday, Friday, and Saturday. Dry weather is expected through Thursday night followed by chances for showers Friday through the weekend into early next week, with breezy conditions for Saturday and especially Sunday.

DISCUSSION
Today: Other than some isolated light showers over the mountain ridges of north central Washington and north Idaho, it will be a dry day today. Upper level high pressure will begin to build over the Inland Northwest today initiating a warming trend.
Afternoon highs will reach the 60s and lows tonight will range from the mid 30s to the low 40s.

Thursday and Friday: Afternoon highs continue to trend warmer with highs in the upper 60s to mid 70s Thursday followed by widespread 70s on Friday. East winds of 5 to 15 mph will be common Thursday and Friday as low pressure organizes off the coast of Oregon. As this system moves inland late in the day Friday there will be a 20 percent chance of showers over the North Washington Cascades and far southeast Washington Friday afternoon into Friday night. /GKoch

Friday night to Tuesday: A stretching and splitting upper trough moves into the region, drawing moisture into the southeast to eastern CWA through early next week, along with breezy conditions. A system with somewhat broader moisture tap will bring broader precipitation chances by next Tuesday.

Between Friday night and Saturday morning the main precipitation potential will be near the deeper basin, southeast WA through southern Panhandle. Saturday afternoon into Sunday that risk expands to northeast WA and north ID. The risk will linger near the NE WA and ID Panhandle mountains Monday, before waning Monday night as a weak ridge builds in. A few showers are possible near the immediate Cascade crest Saturday to Monday too. A few embedded t-storms are possible near southeast WA and the lower ID Panhandle Saturday afternoon. Overall precipitation amounts look light, with the main potential for wetting rain (>=0.10") around the north and eastern periphery of the CWA, near the ID/MT border and toward the Clearwaters. This will be mainly rain with high mountain snow. Wind will increase later Saturday into Sunday, especially near the downwind of the Cascades and Blue Mountains. Gusts of 15-35 mph will be possible, locally higher near the Blues and Waterville Plateau, especially Sunday.

Heading into Tuesday the next frontal wave moves on the region, with a bit deeper moisture. The overall lift is not great but it will still expand the potential for precipitation throughout all but the lee of the Cascades and deeper Columbia Basin Tuesday. Again the precipitation amounts look light. It will be only a slightly breezy, with wind gusts near 10-20 mph in the afternoon.

Temperatures will be above normal Saturday, with highs in the upper 60s and 70s and low in the upper 30s and 40s. Thereafter highs will be upper 50s and 60s, with some lower 70s over the L-C Valley and deeper Columbia Basin. Low will be in the 30s and 40s, with Monday morning looking the coldest with possible frost in some of the sheltered northern valleys. /Solveig

AVIATION
18Z TAFS: Widespread VFR conditions and light winds expected through the 24 hr TAF period.

FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: High confidence in VFR conditions at TAF sites through the period.

Preliminary Point Temps/PoPs
Spokane 38 70 43 71 45 65 / 0 0 10 10 20 20 Coeur d'Alene 35 68 41 72 42 65 / 0 10 10 10 30 30 Pullman 35 66 42 68 44 60 / 0 10 10 10 30 30 Lewiston 41 73 45 74 49 67 / 0 0 0 10 30 30 Colville 34 71 39 73 41 68 / 0 0 10 10 20 30 Sandpoint 37 67 41 67 42 66 / 0 0 10 10 30 30 Kellogg 38 65 43 68 45 60 / 0 10 10 10 30 40 Moses Lake 38 74 45 75 47 70 / 0 0 0 10 20 10 Wenatchee 43 71 47 72 50 67 / 0 0 0 20 20 10 Omak 40 70 44 72 46 72 / 0 0 0 10 20 20

OTX WATCHES/WARNINGS/ADVISORIES
WA...None.
ID...None.