Thursday, October21, 2021
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Marine Weather and Tides
Mayfair, CA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:11AMSunset 6:15PM Thursday October 21, 2021 1:40 PM PDT (20:40 UTC) Moonrise 7:04PMMoonset 8:08AM Illumination 99% Phase: Waning Gibbous; Moon at 16 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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7 Day Forecast for Marine Location Near Mayfair, CA
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location: 36.75, -119.78     debug


Area Discussion for - San Joaquin Valley/Hanford, CA
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FXUS66 KHNX 211056 AFDHNX

Area Forecast Discussion National Weather Service Hanford CA 356 AM PDT Thu Oct 21 2021

SYNOPSIS. Isolated showers are possible towards the north sectors of the district today. Another system will bring light showers to the northern portion of the forecast area Friday afternoon and evening, along with breezy conditions. A much stronger storm system will impact the region Sunday and Monday, bringing moderate to heavy rain for a majority of the forecast area. Calmer pattern to resume after next Tuesday.

DISCUSSION. Some mid and upper level clouds moving onshore across Central CA as well as a few showers crossing over the north sectors of the San Joaquin Valley and Yosemite area. Water vapor images show the district in a long fetch of moisture extending well east over the Pacific Ocean. A Moderate westerly flow aloft will prevail today with a slight warming to near normal temperatures. Upper level disturbances moving through flow may combine with the high moisture to generate a few showers over the north sectors of the district today.

The ensemble solutions appear in fair agreement with the operational models into Monday. A short wave trough will approach the NCal coast Thursday night. This system will bring some rain along a cold front into the central valley during the late morning Friday and in the early afternoon in Yosemite. The upper trough will shift east of the central sierra towards the Great Basin Friday afternoon. The front falls apart as it pushes trough the central valley due to the lack of dynamic forcing. Higher resolution models show a strong northwest flow behind the front. Conditions should turn cooler and breezy across the valley with gusty wind through the mountain passes of the Kern County Mountains and Desert Friday afternoon through Saturday. Models show some light rain accumulations over the Tehachapi Mountains and surrounding foothills Friday night to Saturday morning. A cool onshore flow will continue over CA on Saturday as a disturbance moves brings another front through NCal. A lull in activity will occur on Saturday in central CA.

A much larger and stronger system is expected to dive out of the Gulf of Alaska late Saturday night and approach the region Sunday morning. The upper trough will move off the PacNW coast Sunday. Models prog a long fetch moisture from the Pacific to NCal with this system. The upper trough digs well south over the central CA coast Monday morning bringing the atmospheric river of moisture into Central CA. This will bring a good potential for rainfall across much of the district Sunday and Monday. A strong upper level flow from the west to southwest will lead to a heavy threat of rain over the central sierra due to a favorable upslope wind flow over mountain terrain. The period of the heavier rainfall is expected to be late Sunday night to Monday morning. This will be a rather warm system with snow levels starting as high as 10,000 feet Sunday afternoon, staying to around 9000 feet through Monday morning. Snow levels are expected to drop to around 7000-7500 feet Monday afternoon. This system will likely require a Winter Storm Watch above 9000 feet with a Flood Watch below 9000 feet. 1-2 inches of rainfall are possible in the north sectors of the San Joaquin Valley through Monday afternoon, with 4-6 inches of rainfall possible in the Sierra Nevada below 9000 feet. Above 9000 feet may receive 1 to 3 feet of snow through Monday evening as well. With the heavy rain includes the possibility of debris flow flooding, especially over burned areas over the last year or two. Strong winds may accompany the passage of the cold front Monday. Conditions should turn breezy in the SJ Valley and west side hills while much windier conditions should occur over the Tehachapi Mountains and the Mojave Desert Area.

The storm system is progged to exit the region by late Monday or early Tuesday. A few upsloping showers may persist late Monday into Tuesday after the cold front passes through the region. A drier and calmer weather pattern is expected thereafter.

AVIATION. Mountain obscurations over the Yosemite high country through 20Z Thur. Otherwise VFR conditions will prevail across Central California through at least the next 24 hours.

AIR QUALITY ISSUES. None.

CERTAINTY.

The level of certainty for days 1 and 2 is high. The level of certainty for days 3 through 7 is medium.

Certainty levels include low . medium . and high. Please visit www.weather.gov/hnx/certainty.html for additional information an/or to provide feedback.

HNX WATCHES/WARNINGS/ADVISORIES. None.

public . MV aviation . BS

weather.gov/hanford


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fresno, Fresno Air Terminal, CA4 mi48 minESE 410.00 miMostly Cloudy77°F38°F24%1019 hPa
Madera Municipal Airport, CA24 mi48 minW 39.00 miFair77°F41°F28%1019.3 hPa

Link to 5 minute data for KFAT

Wind History from FAT (wind in knots)
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Last 24hrW4W5W30SW300E300NE5E30E4SE4000W3E3W3SE4NW3SE4
1 day agoS4S5S6S5SE5E3E3E40E600E60000SE7SE6S8E9SE8S10SE8
2 days agoNW7W5
G15
W9NW8NW7NW7NW5NW4NW3W30W5000E30SE4SE3SE5SE8SE4W4NW4

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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GEOS Local Image of Southwest    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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