Friday, December13, 2019
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Marine Weather and Tides
Desert Center, CA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:39AMSunset 4:36PM Friday December 13, 2019 12:37 PM PST (20:37 UTC) Moonrise 7:14PMMoonset 9:02AM Illumination 96% Phase: Waning Gibbous; Moon at 17 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 Desert Center, CA
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location: 33.86, -115.76     debug


Area Discussion for - Phoenix, AZ
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FXUS65 KPSR 131731 AFDPSR

Area Forecast Discussion National Weather Service Phoenix AZ 1031 AM MST Fri Dec 13 2019

UPDATE. Updated Aviation Discussion.

SYNOPSIS. High pressure will result in a slight warming trend through Saturday. Skies will be mostly sunny with few periods of high clouds. A mostly dry weather system will arrive Sunday bringing cooler temperatures across the area with chilly morning low temperatures Monday and Tuesday. Temperatures will rebound slowly through the first half of next week.

DISCUSSION. Ridging across the southwestern CONUS is evident in the latest water vapor imagery while broad troughing persists downstream across the rest of the country. The 13/00Z upper air analysis shows H5 heights were near 582 dm across central Arizona placing near the 90th percentile of climatology for the date. Upper level moisture will bring a few high clouds while daytime temperatures will approach 70 degrees again.

Saturday morning and afternoon will not differ much than Friday but an increase of upper level moisture ahead of a developing Pacific trough will lead to thicker cloud cover beginning late Saturday night. The trough axis will pass over the Four Corners area fairly quickly Sunday and moving off to the east by Monday. Most moisture with this system will remain over Northern Arizona although a few showers may develop over the higher terrain east of Phoenix. The most notable impact from this trough will be much cooler temperatures with Monday and Tuesday forecast to be the coldest days in at least two weeks, if not so far this winter. Overnight lows for KPHX, typically one of the warmest locations in the area, is forecast to drop to near 40 degrees during that time (coldest so far this year is 42). Daytime highs will also be a few degrees below seasonal normals. Otherwise, breezy conditions will develop across southeast California Sunday but wind gusts will remain mostly below 30 miles per hour.

Dry conditions will solidify with ridging rebuilding in the wake of the aforementioned trough. Temperatures recover close to seasonal normals by midweek but model solutions indicate another trough developing over the Pacific towards the end of next week. The location of trough development is more favorable to ingest deeper moisture but the GFS and ECMWF differ on the depth of the trough axis and moisture content. Still, both the GEFS and EPS ensembles provide indications of rain for the desert, but as of now, amounts and aerial coverage do not appear significant with plenty of uncertainty. As of now, low 5-10% PoPs are in the forecast for Thursday-Friday.

AVIATION. Updated at 1730Z.

South-Central Arizona including KPHX, KIWA, KSDL, and KDVT; Southeast California/Southwest Arizona including KIPL and KBLH:

No aviation concerns are expected over the next 24 hours as weak high pressure aloft remains in place. Expect a few passing high clouds through the period with bases remaining aoa 20 kft. Winds will be very light, weakly favoring typical diurnal tendencies in the greater Phoenix area. Lots of light/variable observations expected especially across the western TAF sites with speeds mostly 5kt or less.

FIRE WEATHER. Sunday through Thursday: A weak low pressure system affects the region Sunday into Monday mainly ushering in cooler conditions. Moisture levels with the late weekend system should be rather dry, hindering precipitation chances although there is a chance of rain or high elevation snow on Sunday over high terrain east of Phoenix. Cooler conditions develop Sunday with highs falling below normal by Monday and into the lower 60s over the cooler lower deserts. Minimal warming returns returns Tuesday into Thursday as highs approach seasonal normal levels.Minimum humidity levels initially should stick around 25-35% much of the period, lowering into early next week with desert readings falling into the teens before humidity levels increase again later in the period. Breezy conditions move in for Sunday and Monday, mainly over deserts west of Phoenix. Light winds return again by Tuesday as weak high pressure aloft returns to the area.

SPOTTER INFORMATION STATEMENT. Spotters should follow standard reporting procedures.

PSR WATCHES/WARNINGS/ADVISORIES. AZ . None. CA . None.

DISCUSSION . Deems AVIATION . Smith/CB FIRE WEATHER . Kuhlman/CB


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palm Springs, Jacqueline Cochran Regional Airport, CA27 mi46 minSSE 410.00 miFair69°F41°F36%1018.7 hPa

Link to 5 minute data for KTRM

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Last 24hrSE34S4SE4SE3S3CalmCalmN3W4NW3CalmCalmNW3N5NW3N4W4CalmCalmCalmCalmCalmS4
1 day agoE3S3CalmSE4S4CalmCalmN3CalmN4CalmNW4N3NW6CalmN5N5W3CalmW4Calm3NW33
2 days agoE4SE6SE5SE5CalmNE4N3W3NW3N3NW3N4N5N4NW3CalmN5N3CalmCalmNW5NW4W4NW3

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_P
GEOS Local Image of Southwest    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 Phoenix, AZ (15,3,4,5)
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Ground Weather Radar Station San Diego, CA
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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.