Thursday, March21, 2019 L-36.com


Marine Weather and Tides
Coos Bay, OR

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:16AMSunset 7:31PM Thursday March 21, 2019 9:25 AM PDT (16:25 UTC) Moonrise 7:35PMMoonset 7:04AM Illumination 100% Phase: Full Moon; Moon at 15 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
    EDIT      (on/off)   Help
This is a Weather Statement Zone, please check the Date to see if it has expired
PZZ310 Coos bay bar- coastal waters from cape blanco or to pt. St. George ca out 10 nm- waters from cape blanco or to pt. St. George ca from 10 to 60 nm- 134 pm pdt Wed may 29 2013 a long-duration moderate to strong north wind event is expected to last from this weekend into early next week. Winds should begin to increase Friday into Saturday...peaking Sunday with storm force wind gusts possible. Very steep and hazardous waves will accompany this wind event and mariners should prepare for dangerous conditions at sea. The strongest winds and highest seas will occur beyond 5 nm from shore.
PZZ300 841 Am Pdt Thu Mar 21 2019
Synopsis for the southern oregon coastal waters.. Steady south winds and modest seas are expected today. South winds will then increase tonight into Friday, likely reaching gale force in much of the area. Long period west swell will build in Friday afternoon through Saturday, and then subside Sunday. The combination of building south wind waves and long period west swell will result in very steep and hazardous seas across all areas Friday. Waves will become less steep this weekend, but elevated long period swell will continue to produce steep seas into Sunday morning. The next front is expected Monday.


7 Day Forecast for Marine Location Near Coos Bay, OR
   Hourly   EDIT   Help
location: 43.38, -124.22     debug


Area Discussion for - Medford, OR
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmfr 211553
afdmfr
area forecast discussion
national weather service medford or
853 am pdt Thu mar 21 2019

Discussion 8:45 am satellite imagery are showing clouds
largely dissipating across portions of lake and northern klamath
counties in oregon as well as northeastern modoc county in
california. This is indicative of the mainly dry day we're
expecting across the area before our front comes through. Have
raised high temperatures for this afternoon across the valleys
west of the cascades to be more in line with statistical guidance.

Otherwise, the forecast is on track. -schaaf

Marine Updated 800 am pdt Thursday, 21 march 2019...

breezy south winds will continue through today as an offshore
surface low travels farther to the north. Long period swell will
begin to build into the coastal waters late today, ahead of a front
that is expected to produce south gales and very steep wind driven
seas as it sweeps through the coastal waters Friday morning though
Friday afternoon. Elevated long period west swell will continue
through Saturday and into Saturday night, producing hazardous bar
conditions and higher than average surf before diminishing Sunday
morning.

After a brief break in the action Sunday, model solutions depict
another robust frontal system passing through the region Sunday
night or Monday. Timing and strength remain uncertain due to the
possible tracks of the central low, but there is good confidence
that conditions will deteriorate by Monday morning, with gales and
very steep seas possible with the passage of the front. Expect
forecast updates over the next day or two as details become more
clear. -bpn

Prev discussion issued 323 am pdt Thu mar 21 2019
short term... The going forecast is in really good shape, so few
changes were needed this morning. Upper level low pressure remains
along the central california coast this morning, and this low will
gradually shift east across california and into the great basin
through the day. Radar, satellite, and surface observations show
that not much is going on over our forecast area this morning, and
this will probably continue to be the case for most of us today.

Guidance does show some precipitation rotating over the east side
and into the mountains as the upper low shifts east, and the
forecast has this covered.

Precipitation may dry up completely tonight as the upper low
departs and the next front approaches the coast. The exception may
be in the mt. Shasta area where persistent, moist flow up the
sacramento valley will keep at least a small chance for
precipitation going there.

On Friday, the next front arrives and will bring widespread valley
rain and high mountain snow to the region. Precipitation amounts
don't look impressive, but eventually everyone should see some
measurable rain or snow with this front. This front will also
bring breezy conditions to many of the usual areas, and one small
adjustment to the forecast was to increase pre-frontal south winds
across the east side. It doesn't look like any land areas will
reach advisory level wind speeds, but it will be breezy and gusty
nonetheless.

The front moves through Friday night, then the upper trough will
move overhead Saturday with considerable shower activity expected.

Previous shifts inserted a slight chance for thunderstorms on the
west side Saturday afternoon and evening, and this certainly
still looks warranted. Nothing was changed in the extended portion
of the forecast, and the previous discussion from yesterday
follows. -wright
long term... Sunday through Thursday, march 24-28, 2019...

a short wave ridge will build over the area Saturday night into
Sunday. The air mass, while cold, doesn't look cold enough to have
a large impact on local agriculture, with expected lows Sunday
morning in the low to mid 30s for the west side valleys. East side
areas will have lows in the teens and 20s, but their growing season
is still a ways off.

Overall, dry, mild weather is expected Sunday afternoon with highs
in the low to mid 60s west of the cascades and in the low to mid 50s
over the east side. Locally breezy conditions (from the sse) may
develop in the shasta valley.

The next front offshore will approach the coast Sunday night, then
move onshore Monday. There should be a period of gusty south to
southeast winds in advance of the front, especially in the typical
locations like the shasta valley, the southern end of the rogue
valley and over the east side. A period of steadier precipitation is
expected to accompany the front, especially from the coast ranges of
sw oregon to western and central siskiyou county, where there could
be 0.50-1.50 inches of liquid precipitation. Amount will be much
lighter farther north and east across the cwa. Snow levels at this
time look to be around 4500 feet, with most accumulating snow above
5000 feet.

Broad SW flow aloft will set up Monday night with a closed
low out near 130 W wobbling offshore of wa or Tuesday and
Wednesday. This will maintain unsettled weather for much of the
balance of next week with another frontal system moving onshore
Tuesday and Tuesday night. This front appears very similar to
its predecessor, with the bulk of the moisture precipitation
expected across our southern and western zones. A showery
pattern continues Wednesday through Thursday, but showers
gradually diminish in coverage and intensity as the closed low
offshore opens up and moves onshore. -spilde
aviation... For the 20 06z tafs... Isolated showers will persist
overnight across southern oregon and northern california. Mountain
obscurations and MVFR ceilings are expected tonight as moist air
lingers across the region. Roseburg and north bend have a brief
chance at MVFR ceilings tonight. Otherwise, VFR conditions will
prevail for the TAF period.

-smith
marine... Updated 800 pm pdt Wednesday, 10 march 2019...

gale force winds will continue this evening. The strongest winds
will occur between 5 and 15 nm away from shore and south of cape
blanco. These winds will then weaken early Thursday morning around
5am. Breezy south winds will continue Thursday as this low
travels farther to the north.

Long period swell will begin to build into the coastal waters late
Thursday, ahead of a front that is expected to produce south gales
and very steep wind driven seas as it sweeps through the coastal
waters Friday morning though Friday afternoon. Elevated long period
west swell will continue through Saturday and into Saturday night,
producing hazardous bar conditions and higher than average surf
before diminishing Sunday morning.

After a brief break in the action Sunday, model solutions depict
another robust frontal system passing through the region Sunday
night or Monday. Timing and strength remain uncertain due to the
possible tracks of the central low, but there is good confidence
that conditions will deteriorate by Monday morning, with gales and
very steep seas possible with the passage of the front. Expect
forecast updates over the next day or two as details become more
clear.

-bpn smith

Mfr watches warnings advisories
Or... Beach hazards statement from 2 pm pdt this afternoon through
late tonight for orz021-022.

Ca... None.

Pacific coastal waters... Gale warning from 8 am to 5 pm pdt Friday for
pzz350-356-370-376.

Hazardous seas warning from 8 am to 5 pm pdt Friday for
pzz350-356.

Hazardous seas warning from 11 pm this evening to 5 pm pdt
Friday for pzz370-376.



Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHAO3 - 9432780 - Charleston, OR 7 mi50 min SE 1 G 2.9 53°F1020.1 hPa
SNTO3 9 mi56 min Calm 45°F 1020 hPa45°F
46128 18 mi86 min SSW 9.7 47°F 51°F
46229 - UMPQUA OFFSHORE, OR (139) 32 mi56 min 51°F7 ft
PORO3 - 9431647 - Port Orford, OR 47 mi38 min Calm G 0

Wind History for Charleston, OR
(wind in knots)    EDIT      (on/off)   Help
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
5
AM
6
AM
7
AM
8
AM
9
AM
Last
24hr
N1
W5
G10
SW6
G13
SW4
G9
W6
G12
W8
G13
W8
NW4
W4
NE2
SW2
SE1
E2
SE2
E2
S1
G4
SE1
G6
SW1
--
SE1
SE1
SE1
S2
S1
1 day
ago
SW3
SW3
G9
W6
G13
W7
G11
W9
G13
W8
G11
N4
N3
NW2
N2
S1
G5
E1
G5
SE2
W2
N1
SE4
S1
G5
NW1
SE4
E1
SE3
G6
NE1
W1
W1
2 days
ago
SE2
W2
W7
G10
W8
G13
W9
G14
W8
G12
W8
G13
W6
W3
NE1
SE1
S1
SE1
SE3
SE4
--
E2
NW1
SE3
SE5
G8
SE5
G8
SE6
G9
SE4
G8
SE4
G7

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Southwest Oregon Regional Airport, OR4 mi30 minN 010.00 miA Few Clouds50°F48°F93%1020.3 hPa

Wind History from OTH (wind in knots)
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
5
AM
6
AM
7
AM
8
AM
9
AM
Last 24hrSE4NW3SW13SW11W10W11NW8NW6NW8NW3W3SW6E3E3S4SE4S4SE3SE4SE5S4S3SE3Calm
1 day agoSE8SW10W13W11NW7W7NW4W5W7W4CalmSE3CalmW7CalmE6CalmSW3SE6SE3SE5E3CalmSE5
2 days agoCalmE4SE3W12W10W7W9W7W4W3W4E3S6SE6SE7SE6SE6SE4CalmE4--SE6S5SE7

Tide / Current Tables for Charleston, Oregon
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Charleston
Click for Map
Thu -- 01:12 AM PDT     7.98 feet High Tide
Thu -- 07:14 AM PDT     0.35 feet Low Tide
Thu -- 07:18 AM PDT     Sunrise
Thu -- 08:03 AM PDT     Moonset
Thu -- 01:19 PM PDT     8.17 feet High Tide
Thu -- 07:30 PM PDT     Sunset
Thu -- 07:34 PM PDT     -0.42 feet Low Tide
Thu -- 08:34 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
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
7.287.76.44.62.61.10.40.61.93.75.77.38.17.96.84.92.70.9-0.2-0.30.62.44.6

Tide / Current Tables for Charleston, Oregon (2)
   EDIT      (on/off)   Help   One Week of Data
Charleston
Click for Map
Thu -- 01:06 AM PDT     7.92 feet High Tide
Thu -- 07:06 AM PDT     0.46 feet Low Tide
Thu -- 07:18 AM PDT     Sunrise
Thu -- 08:03 AM PDT     Moonset
Thu -- 01:11 PM PDT     8.19 feet High Tide
Thu -- 07:28 PM PDT     -0.34 feet Low Tide
Thu -- 07:30 PM PDT     Sunset
Thu -- 08:34 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
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
7.37.97.56.24.42.51.10.50.92.2467.58.27.96.64.62.50.8-0.2-0.20.92.74.8

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_P
GOES Local Image of PacificNorthwest    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Medford, OR (12,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Medford, OR
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.