Page Links Change Location One Page Printer Page HELP Default setup SAVE setting RECALL saved setting

Marine Weather and Tides Mount Shasta, 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 6:31AM

Sunset 6:09PM

Sunday March 7, 2021 4:07 AM PST (12:07 UTC)

Moonrise 3:08AM

Moonset 12:12PM

Illumination 36%

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.

---

---

7 Day Forecast for Marine Location Near Mount Shasta, CA

   Hourly   EDIT   Help

---

Area Discussion for - Medford, OR

      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS66 KMFR 071134 AFDMFR

Area Forecast Discussion National Weather Service Medford OR 334 AM PST Sun Mar 7 2021

DISCUSSION. A cold front is moving inland currently. KMAX is showing a fairly healthy, but narrow rain band associated with the front stretching from near Roseburg south through the Illinois Valley. Surface observations indicated around 0.10-0.30"/hr rainfall rates occurred within the band as it pushed onto the coast in the last hour or so. However, as the front pushes eastward to the Cascades early this morning, the upper support for the front will head into SW Canada. As a result, we expect the front/rain band to fall apart such that little, if any, precipitation makes it east of the Cascades today. In fact, what's left of the front this morning will barely bring rainfall to Medford/Ashland (maybe the type that just manages to wet the ground in some places with up to a few clicks in a few area gauges). Snow levels are running around 2000 feet, but could be down around 1500 feet early this morning, especially in the Illinois Valley near Hayes Hill in the rain band during the next hour or so. Similar to yesterday though, with ground temperatures expected to be above freezing, we're not expecting any impactful road accumulation. Precipitation will taper off to showers later this morning with just some isolated to scattered showers lingering into this afternoon, mainly over higher terrain and north of the Umpqua Divide. Most areas will have at least partial sunshine this afternoon. Overall, expect highs a bit below normal -- in the low to mid 50s for most west side valleys and in the mid to upper 40s over the east side.

We'll have a break tonight and it could get just cold enough (lows in the mid 30s) for frost potential just inland from the coast in Coos/Curry Counties. Haven't issued a frost advisory, however, due to lower confidence in the duration of those temperatures. The necessary 3 hour duration is unlikely and would put the probability at around 15-20%.

A vertically stacked closed low centered near 48N and 136W early Monday morning will drop slowly south-southeastward offshore Monday into Tuesday. This will keep unsettled weather across the forecast area with some showers, most numerous along the coast and in SW portions of the area including Siskiyou County. Inland areas will likely see most activity during the afternoons as instability will be maximized then. Speaking of instability, models continue to show the potential for thunderstorms over the coastal waters beginning Monday and continuing there into Tuesday. A few of the stronger cells that get going could push into Coos/Curry Counties. It should be noted that due to the cold air mass aloft, that any of the stronger showers will have the ability to produce small hail/graupel as is often the case in these parts during the late winter and into spring. Snow levels during this period will be mostly 2000-3000 feet, highest during the daytime and lowest during the late night hours. We aren't expecting a lot of snow with this system, but there could be some impactful snow in portions of western and south-central Siskiyou County. Preliminary indications are for potential advisory amounts near Mount Shasta City with 2-5 inches occurring Monday night into Tuesday morning. We'll monitor this potential and consider winter headlines over the coming shifts.

The closed low will continue to push SSE off the California Coast on Wednesday. Lingering instability could still trigger scattered showers during the day, but expect these to shut off around sunset Wednesday evening as instability wanes and the low moves farther away. Upper ridging will then build into the area Thursday into Friday with likely dry and milder weather. It is still in question how long the ridge will persist, however. -Spilde

AVIATION. For the 07/12Z TAF Cycle . Overall conditions are generally VFR this morning. However, a cold front is moving through the area this morning, bringing areas of MVFR cigs along the front as well as terrain obscurations, especially along of and west of the Cascades. This front is weakening as it moves farther inland and little to no precipitation is expected east of the Cascades and VFR conditions will persist there. Once the front fizzles out, expect any lower conditions to improve to VFR later this morning and afternoon. /BR-y

MARINE. Updated 200 AM PST Sunday 07 Mar 2021 . Winds will continue to diminish this morning while seas will remain steep and transition to swell dominated this morning and afternoon. A very high and very steep long period west-northwest swell builds in the waters today, peaking late this evening into early Monday morning at 16 to 18 ft. Swell will lower Monday, but a series of disturbances will continue through Tuesday with high and steep seas expected to continue. Winds are likely to become northerly Tuesday night with seas diminishing but becoming dominated by northerly wind seas as high pressure builds toward the area. North winds Wednesday into Thursday will be strongest south of Cape Blanco. The pattern may turn active again at the end of the week. -DW/BR-y

MFR WATCHES/WARNINGS/ADVISORIES. OR . High Surf Advisory from 1 PM this afternoon to 7 AM PST Monday for ORZ021-022.

CA . None.

Pacific Coastal Waters . Small Craft Advisory until 4 PM PST this afternoon for PZZ356-376. Small Craft Advisory from 4 AM Monday to 4 PM PST Tuesday for PZZ350-356-370-376. Hazardous Seas Warning until 4 AM PST early this morning for PZZ350-356-370-376. Hazardous Seas Warning from 4 PM this afternoon to 4 AM PST Monday for PZZ350-356-370-376. Small Craft Advisory until 4 PM PST this afternoon for PZZ350-370.

MAS/MNF

---

Weather Reporting Stations

   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

---

Airport Reports

    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.

Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Mount Shasta, CA	1 mi	71 min	N 0	10.00 mi	A Few Clouds	32°F	27°F	82%	1020.1 hPa

Link to 5 minute data for KMHS

Wind History from MHS (wind in knots)

5 AM

6 AM

7 AM

8 AM

9 AM

10 AM

11 AM

12 PM

1 PM

2 PM

3 PM

4 PM

5 PM

6 PM

7 PM

8 PM

9 PM

10 PM

11 PM

12 AM

1 AM

2 AM

3 AM

4 AM

Last 24hr

3

W3

4

Calm

3

3

Calm

Calm

Calm

SE4

Calm

Calm

Calm

Calm

Calm

Calm

E3

Calm

Calm

Calm

Calm

Calm

Calm

Calm

1 day ago

E10 G14

E6 G16

E13 G20

E8 G17

E6

SE7

3

S4

Calm

Calm

4

3

Calm

Calm

3

3

Calm

Calm

NW7

Calm

W3

3

NW8

NW7

2 days ago

E6

SE5

E7

E7 G18

SE4

Calm

3

4

3

3

S4

3

Calm

3

Calm

Calm

Calm

Calm

E5

SE4

E5

E10 G15

E10

E10 G19

---

Tide / Current Tables for Trinidad Harbor, California

   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data

---

Tide / Current Tables for

   EDIT      (on/off)   Help

---

Weather Map

       (on/off)   Help Weather Map

---

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.
Link to Loop

Other links: GEOS-West     Contential US     Full GOES-East

---

Ground Weather Radar Station

---

Please read website Cookie, Privacy, and Disclamers by clicking HERE.

---