Monday, April19, 2021
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Marine Weather and Tides
Atwater, CA

Version 3.4
NOTICE
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 6:20AMSunset 7:42PM Monday April 19, 2021 2:47 PM PDT (21:47 UTC) Moonrise 10:34AMMoonset 12:59AM Illumination 54% Phase: First Quarter Moon; Moon at 8 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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PZZ535 Monterey Bay- 200 Pm Pdt Mon Apr 19 2021
.small craft advisory in effect through Tuesday evening...
Tonight..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 6 to 7 ft.
Tue..W winds 20 to 30 kt with gusts up to 35 kt. Wind waves 7 to 8 ft.
Tue night..W winds 15 to 25 kt with gusts up to 30 kt. Wind waves 2 to 3 ft. W swell 5 to 7 ft at 11 seconds.
Wed..W winds 5 to 15 kt. Wind waves 1 ft. W swell 4 to 6 ft at 11 seconds.
Wed night..W winds 5 to 10 kt. Wind waves 1 ft. W swell 4 to 6 ft at 11 seconds.
Thu..W winds 5 to 15 kt. Wind waves 1 ft. W swell 4 to 6 ft at 10 seconds.
Thu night..W winds 5 to 10 kt. Wind waves 1 ft. W swell 3 to 5 ft at 10 seconds.
Fri..W winds up to 10 kt. Wind waves 1 ft. W swell 2 to 4 ft and S around 2 ft.
Sat..W winds up to 10 kt. Wind waves 1 ft. W swell around 2 ft. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 200 Pm Pdt Mon Apr 19 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Buoy observations show moderately gusty northwest winds, with near gale force gusts in the coastal waters south of point sur. Gale force gusts are expected to develop over the northern waters this evening. Gusty winds will persist through Tuesday evening. These winds will produce steep wind waves resulting in hazardous seas conditions, particularly for smaller vessels. Moderate northwest swell through the period along with a lighter longer period southerly swell.


7 Day Forecast for Marine Location Near Atwater, CA
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location: 37.35, -120.61     debug


Area Discussion for - San Joaquin Valley/Hanford, CA
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FXUS66 KHNX 191006 AFDHNX

Area Forecast Discussion National Weather Service Hanford CA 306 AM PDT Mon Apr 19 2021

SYNOPSIS. Very warm and dry conditions will continue today. An upper-level low will pass over Central California late Tuesday into Wednesday and bring cooler temperatures and the potential for locally gusty winds in the typical wind-prone areas. In addition, expect a chance of precipitation in the Sierra Nevada on Wednesday, with a slight chance for showers in the mountains and desert on Thursday due to another upper-level disturbance. Dry conditions with a brief return of warm and dry weather is in store for Friday and the weekend. However, another storm system could produce more widespread precipitation by early next week.

DISCUSSION. High pressure will continue to bring much warmer than average temperatures today. Highs will likely reach the upper-80s at the warmest locations in the San Joaquin Valley once again. The probability for highs of 90 degrees remains low for today, though we cannot rule out some isolated 90 degree readings in the Central Valley. The ridge is expected to weaken by this evening and will soon bring some changes.

Temperatures are expected to trend down a bit on Tuesday as an upper-level low pressure system approaches from Northern California. However, some locations in southern portions of our forecast area (or generally south of Fresno County) may not observe much change in afternoon highs on Tuesday, compared to today's. Although, on late Tuesday afternoon into the evening, there is the probability of increased winds in the Kern County mountains and desert, with up to a 70 percent chance of winds gusting to around 35 mph. Some isolated showers cannot be ruled out towards the Yosemite high country late in the evening.

On Wednesday, expect the best chance for showers during the afternoon into the evening for the Sierra Nevada from Yosemite to Tulare County, as another upper-level disturbance moves in just behind the one that passes our forecast area on late Tuesday into early Wednesday. Some isolated thunderstorms are possible Wednesday afternoon and early evening along the crest. Generally light precipitation amounts are likely, though brief moderate to heavy showers may occur if any thunderstorms develop. Lingering showers are possible on Thursday due to this second disturbance and could develop into parts of Kern County, including the mountains and desert. Locally gusty winds also remain a possibility in these areas for the late afternoon into the evening on both Wednesday and Thursday. Otherwise, temperatures will lower by several degrees, though remain slightly above seasonal averages for Wednesday and Thursday.

Daytime highs will trend back up on Friday and Saturday, though will likely be similar to those observed yesterday. This warmup is expected to be brief, and temperatures could lower considerably by early next week due to an approaching cold storm system from the Gulf of Alaska. Depending on strength of the low and available subtropical moisture, this storm could bring a period of widespread rain to much of our lower elevation areas, as well as snow in the higher elevations of the Sierra Nevada. This would be a significant change to our ongoing weather pattern, as we have received little or no precipitation for the last several weeks. In addition, cooler than average temperatures could also return. Stay tuned for more details as we get closer to next week.

AVIATION. VFR conditions are forecast to prevail across the central CA interior over 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/Aviation/Fire Wx . BSO PIO/IDSS . CMC

weather.gov/hanford


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ELXC1 - Elkhorn Slough Reserve, CA 70 mi62 min W 4.1 56°F 1023 hPa49°F
MLSC1 - Moss Landing, South Harbor, CA 73 mi21 min 56°F

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Merced / Castle Air Force Base, CA3 mi2 hrsWNW 510.00 miClear88°F36°F16%1016.9 hPa
Merced Regional Airport, CA6 mi54 minNW 710.00 miFair85°F38°F19%1015.6 hPa

Link to 5 minute data for KMER

Wind History from MER (wind in knots)
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Last 24hrNW8NW7NW7NW7NW7NW7CalmNW3NW7N4CalmCalmCalmCalmE4E4E3SE3CalmCalmCalmCalmW5W5
1 day agoNW9--NW9N7N7CalmCalmCalmNW3SE3CalmCalmCalmCalm----NW3N3--CalmCalmCalm--Calm
2 days agoW10W10NW10
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Tide / Current Tables for Grant Line Canal (drawbridge), Old River, California
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Grant Line Canal (drawbridge)
Click for Map
Mon -- 02:04 AM PDT     Moonset
Mon -- 03:35 AM PDT     2.59 feet High Tide
Mon -- 06:24 AM PDT     Sunrise
Mon -- 07:44 AM PDT     1.64 feet Low Tide
Mon -- 11:36 AM PDT     Moonrise
Mon -- 12:49 PM PDT     3.32 feet High Tide
Mon -- 07:45 PM PDT     Sunset
Mon -- 09:29 PM PDT     0.14 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.92.32.52.62.321.71.61.82.22.83.23.33.12.72.21.610.60.30.20.20.4

Tide / Current Tables for Brandt Bridge, San Joaquin River, California Current
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Brandt Bridge
Click for Map
Mon -- 01:03 AM PDT     0.50 knots Max Flood
Mon -- 02:04 AM PDT     Moonset
Mon -- 03:59 AM PDT     -0.00 knots Slack
Mon -- 06:23 AM PDT     Sunrise
Mon -- 06:28 AM PDT     -0.27 knots Max Ebb
Mon -- 08:47 AM PDT     0.00 knots Slack
Mon -- 11:14 AM PDT     0.45 knots Max Flood
Mon -- 11:35 AM PDT     Moonrise
Mon -- 01:23 PM PDT     -0.00 knots Slack
Mon -- 05:32 PM PDT     -1.09 knots Max Ebb
Mon -- 07:45 PM PDT     Sunset
Mon -- 10:28 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.50.40.2-0-0.2-0.3-0.3-0.20.10.30.40.40.1-0.2-0.6-0.9-1.1-1.1-1-0.8-0.5-0.20.2

Weather Map
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GEOS Local Image of CentralWestCoast    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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