Tuesday, March26, 2019 L-36.com


Marine Weather and Tides
Ponderay, ID

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 6:35AMSunset 7:09PM Tuesday March 26, 2019 3:51 AM PDT (10:51 UTC) Moonrise 12:59AMMoonset 10:06AM Illumination 71% Phase: Waning Gibbous; Moon at 20 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 Ponderay, ID
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location: 48.36, -116.55     debug


Area Discussion for - Spokane, WA
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Fxus66 kotx 260858
afdotx
area forecast discussion
national weather service spokane wa
158 am pdt Tue mar 26 2019

Synopsis
Today will feature a few mountain showers... Otherwise mostly dry
weather and breezy winds at times. The active weather pattern
continues with yet another system bringing rain and high mountain
snow Wednesday night and Thursday. Thereafter we will see drier
conditions with spring like temperatures into the weekend.

Unsettled conditions look to return for early next week.

Discussion
Today through Wednesday: a cold front is currently moving through
the idaho panhandle this morning bringing scattered light showers
with precipitation amounts of a few hundredths. The front will
slowly sag to the east and south and should be east of kamiah and
lookout pass by midday. A dry slot will work into the columbia
basin and north idaho this afternoon and we should see a decent
amount of sunshine along with seasonal temperatures and breezy
southwest winds. Further north across the northern mountains... The
drying will not be as pronounced and the atmosphere will
destabilize as a -30c cold pool moves overhead. This will result
in a isolated and a very small chance for an isolated lightning
strikes along the immediate canadian border. Tuesday will be a
chilly one with light winds and dry air leading to temperatures
near or slightly below freezing. On Wednesday, winds will swing
around to the east as another deep low pressure system crosses
130w toward the pac NW coast. Winds will become breezy throughout
the day, especially through the purcell trench from sandpoint to
rathdrum and across the open columbia basin. The remnants of
today's cold front and associated axis of moisture that will be
over northern oregon southern idaho will begin to slowly migrate
back to the north renewing precipitation chances over the camas
prairie... Blue mtns... And l-c valley. Heating on the northern
periphery of this cloud shield will result in some afternoon
instability and potential for a few light to moderate showers. Sb
Wednesday night and Thursday night: a deformation band will push
north across the region. There is a lot of model difference with
the strength of this band with low confidence on details at this
time. The general consensus is that the band will hold together
across or through Wednesday evening, but then weaken as it shears
apart across wa and north id on Thursday. The 00z GFS solution
appears too strong and spins up stronger lee side cyclogenesis
east of the cascades. This solution develops higher precip
bullseyes than the other models and these have largely been
discounted. I went more toward a blend of the ecmwf, NAM and sref
solutions. Best chances for precip will be across the southern
portion of the forecast area then blended towards lower chances
toward the canadian border. Precip type may be a bit tricky for
the northern valleys if moisture holds together long enough to
make it that far north. There is a chance for a rain snow mix for
Thursday morning down to about 3000 ft in elevation, but I don't
think there will be enough moisture for much in the way of
impacts. Snow impacts will be more likely over the pass and more
specifically over lookout pass and stevens pass where a couple
inches of snow accumulation will be possible. Thursday looks to be
a cooler day with clouds and showers hanging around. I blended
the forecast towards the cooler end of available model guidance.

Friday through Tuesday: the upper low pressure system off of the
coast will eject inland on Friday with the track being south of
the region. Higher pressure will then build in through the weekend
with a drying and warming trend. We will see seasonable
temperatures with sunny days. Models do indicate the potential
for showers increasing early next week. Temperatures do not appear
to warm up enough or see the potential for enough rain for a
hydrology concern. Svh

Aviation
06z tafs: expect primarilyVFR conditions at all sites during this
period, however a cold front will migrate over the forecast sites
between now and 11z or so. The threat of rain for kmwh and keat will
wind down around 08z and at the other sites around 10z. The front
will only produce light precipitation so we primarily expectVFR
conditions, but if it gets a little heavier than expected, brief
MVFR CIGS are possible, especially at kgeg and kpuw. We did not feel
confident enough to place MVFR CIGS as prevailing conditions but
figured scattered MVFR clouds would suffice. The other facet of the
front is it will deliver a wind shift from east or southeast to more
of a west to southwest one, with wind gusts of 15-20 kts possible
especially at kgeg. There could also be some brief and localized
llws ahead of the front before the winds can mix down to the surface
with the best chances at kgeg. The winds will die down behind the
front, but should pick up again by tomorrow afternoon. Conditions
will be allVFR by late morning Tuesday and into the afternoon. Fx

Preliminary point temps pops
Spokane 55 30 59 37 49 33 10 0 0 40 50 20
coeur d'alene 54 29 56 35 49 33 20 0 0 40 50 20
pullman 50 31 54 35 46 33 40 0 20 50 50 30
lewiston 57 38 57 41 51 40 50 10 30 50 60 30
colville 58 26 62 30 54 28 30 0 0 30 40 10
sandpoint 52 29 54 34 49 32 30 0 0 30 50 20
kellogg 51 32 54 36 48 33 50 0 10 50 60 30
moses lake 59 32 59 38 53 35 0 0 10 50 50 20
wenatchee 58 34 57 38 50 35 0 0 10 50 50 20
omak 57 30 56 36 53 34 10 0 0 30 50 20

Otx watches warnings advisories
Id... None.

Wa... None.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sandpoint, Sandpoint Airport, ID4 mi77 minN 010.00 miOvercast37°F35°F93%1014.2 hPa

Wind History from SZT (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmNE4NE4NE5CalmE4CalmE5N4NE4NE6NE8NE9CalmCalmCalmSW3S6CalmCalm
1 day agoW3CalmCalmCalmCalmCalmE8E8E7E6E4SW7SW9
G15
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G15
SW7S8S7S5S4SW3SW3CalmCalmCalm
2 days agoCalmCalmCalmCalmCalmCalmCalmS8S10S9S8SE7S7SW5SW4CalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for
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Weather Map and Satellite Images
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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.
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Wind Forecast for Spokane, WA (6,6,7,8)
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Ground Weather Radar Station Spokane, WA
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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.