Marine Weather and Tides
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
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|Sunrise 5:10AM||Sunset 8:46PM||Tuesday May 26, 2020 10:16 AM PDT (17:16 UTC)||Moonrise 7:19AM||Moonset 11:45PM||Illumination 21%|
7 Day Forecast for Marine Location Near Winthrop, WAHourly EDIT Help
Area Discussion for - Spokane, WA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS66 KOTX 261131 AFDOTX
Area Forecast Discussion National Weather Service Spokane WA 431 AM PDT Tue May 26 2020
SYNOPSIS. Expect lingering showers over northeast WA into the Idaho Panhandle today. A strong warming trend is expected from mid week into the weekend with many locations expected to reach the upper 80s to low 90s by Friday. A chance of thunderstorms will develop for the weekend with cooling temperatures back to near normal for early next week.
DISCUSSION. Today through Friday night . Good model agreement in both deterministic and ensemble model average flow regimes exists for today through the end of the week making for a fairly high confidence forecast for a drying and warming trend through Friday. A minor weak short wave disturbance transiting southern Canada will promote some lingering showers today over the mountains of extreme northeast Washington and the Idaho Panhandle . with the rest of the area drying and beginning to clear after areas of morning fog and low clouds associated with the wet boundary layer deposited by yesterday's storm system. High temperatures today will climb to about seasonal normal with increasing sunbreaks during the afternoon as morning stratus breaks out into fields of broken cumulus over the eastern basin . with mainly clear conditions over the western basin.
Wednesday through Friday the warming trend begins in earnest as a short wave rideg builds over the region. the rideg axis will move east of the forecast area on Thursday but this will put the region in a southerly flow warm advection regime which will spur temperatures to the warmest readings of the year so far and well above average. Expect widespread 80 degree readings by Thursday and mid 80s over much of the populated lower elevation areas with some lower to mid 90s readings in the lowest elevations of the Columbia Basin on Friday. All of this will be accompanied by dry conditions but with increasing high clouds by Friday as moisture gets caught up in the southerly flow. Way out on Friday evening moisture may become deep enough to promote a ghost of a chance of some showers over the higher terrain of the southeastern zones but the threat of a real rideg breakdown and associated active weather looks to hold off until late Saturday as detailed below. /Fugazzi
Saturday to Monday: The breakdown of the ridge of high pressure this period will carry the threat of showers and thunderstorms, some breezy conditions and a return to more seasonal temperatures by the start of next week. Saturday the area remains in a southerly flow with the ridge axis shifting from the north ID to western MT, while a sharp negatively-tilted trough moves north from California. The ingredients that have been described over the past few days for the potential for strong thunderstorms remains, including: the above normal heat (highs in the 80s and 90s), abundant moisture (with PWATs over 1 inch and dew points in the 50s to low-60s), and instability (with CAPE values between 500-2500 J/kg and LI values between -3 to -6C), and 0-6KM shear values around 40-60 kts. However that instability is moderately capped, with CIN values between 100-300 J/kg, and the instability weakens with the loss of daylight. So what this means is that if this moisture and instability is to be utilized to generate showers and thunderstorms, it appears it will need that sharp trough as a kicker to get things going, especially away from the higher terrain. At this point, models disagree on the precise timing and track of that shortwave trough coming up from California. Some computer models are quicker to bring it toward WA/north ID than others, before the main cold front/upper trough axis shifts through between late Saturday night and Sunday. Bottom line: showers and thunderstorm chances will increase across the region, with the highest risk Saturday afternoon and Saturday night. The best threat for thunderstorms will be before sunset and over the southeast CWA. If things sync up between lift, moisture and instability some rather strong thunderstorms are possible.
Then as Sunday morning progresses into afternoon the overall threat of showers and thunderstorms shifts toward the Cascades and northern mountains, as well as the far southeast CWA, while the risk decreases over the Columbia Basin. The area remains under the influence of the upper trough and moisture wrapped up in it. However overall instability is lower and the threat of strong thunderstorms will be more limited. However the passing system will also increase gradients and winds are expected to be breezy. Some guidance is suggesting wind gusts around 20-30 mph are possible, with a few outliers showing possible gusts up to 40 mph. Confidence in these details is limited, but either way it looks breezy. For Sunday night into Monday morning the area quiets down. However we will have to watch for some fog in the north to northeast valleys. Monday afternoon brings the threat of additional isolated to scattered showers and a limited threat of thunderstorms, with that latter threat mainly over the SE CWA at this point. Temperatures are expected to drop back closer to seasonal norms for Sunday and Monday. /Cote'
AVIATION. 12Z TAFS: A moist boundary layer from recent rain will promote upslope low MVFR and occasional IFR ceilings at the KGEG/KSFF and KCOE TAF sites through 16Z-18Z today with ceilings breaking up and lifting to VFR cumulus. The KLWS TAF site may experience in-and- out ST and BR under clear skies before VFR cloud ceilings move in around 14Z to 15Z. Otherwise a weak short wave brushing by to the north will promote isold -SHRA over the Idaho panhandle and northern mountains today with the KCOE TAF site possibly subject to a brief shower with VFR ceilings this afternoon. A rideg aloft will build over the region tonight providing VFR conditions through 12Z Wednesday. /MJF
PRELIMINARY POINT TEMPS/POPS. Spokane 71 46 75 49 80 53 / 10 0 0 0 0 0 Coeur d'Alene 69 45 74 48 80 52 / 20 0 0 0 0 0 Pullman 70 45 73 48 79 54 / 10 0 0 0 0 0 Lewiston 77 52 80 54 85 60 / 10 0 0 0 0 0 Colville 75 43 78 47 83 51 / 10 0 0 0 0 0 Sandpoint 69 43 74 49 78 53 / 30 10 0 0 0 0 Kellogg 67 50 72 49 78 54 / 40 0 0 0 0 0 Moses Lake 80 46 84 53 89 57 / 0 0 0 0 0 0 Wenatchee 78 49 82 56 86 59 / 0 0 0 0 0 0 Omak 77 47 80 53 85 56 / 0 0 0 0 0 0
OTX WATCHES/WARNINGS/ADVISORIES. ID . None. WA . None.
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|Omak Airport, WA||35 mi||24 min||N 0||10.00 mi||Fair||63°F||50°F||63%||1015.9 hPa|
Link to 5 minute data for KOMK
Wind History from OMK (wind in knots)
|1 day ago||S||S||SW|
|2 days ago||N||NW||NW||NW||N||SE||Calm||Calm||S||S||SW||S||S||S||S||SW||W||W||W||Calm||Calm||SE||SE||S |
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Wind Forecast for Spokane, WA (13,3,4,5)(on/off)  Help
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