Marine Weather and Tides
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.
|Sunrise 6:33AM||Sunset 4:35PM||Friday December 4, 2020 4:32 PM PST (00:32 UTC)||Moonrise 9:31PM||Moonset 11:17AM||Illumination 76%|
7 Day Forecast for Marine Location Near Desert Center, CAHourly EDIT Help
Area Discussion for - Phoenix, AZ  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS65 KPSR 042333 AAB AFDPSR
Area Forecast Discussion National Weather Service Phoenix AZ 433 PM MST Fri Dec 4 2020
UPDATE. Updated Aviation Discussion.
SYNOPSIS. A cool air mass over the region will continue to bring chilly overnight and early morning conditions through Saturday with low temperatures dipping into the 30s over a good portion of the lower deserts. A warming trend will then take hold this weekend into early next week bringing high temperatures back to above normal levels starting Sunday. Highs are likely to top out in the middle to upper 70s during the first half of next week before a potential weather system enters the picture late next week likely dropping temperatures back to near normal with a slight chance of showers over high terrain areas.
DISCUSSION. A high amplitude ridge remains centered over southern Canada with its southern periphery extending south into northern Arizona. Meanwhile, an upper level low continues to track slowly southeast over Sonora. In the wake of this departing system, Arizona remains under the influence of a very dry and relatively cool air mass (near the surface). Upper levels have warmed considerably compared to yesterday, but little to none of this warming will be realized in the short term because of the aforementioned cooler air remaining near the surface.
Low temperatures this morning were in the 30s most locations, with many colder valleys recording a freeze. The coldest lower desert areas are still expected to dip to around freezing again Saturday morning, particularly in La Paz and Yuma Counties, with localized Freeze Warnings in place for those locations. The upper level ridge to our northwest will slowly work its way into our region over the next couple days and this will allow for some gradual warming bringing our highs from the 65-70 degree range today to the lower 70s by Sunday, and perhaps close to 80 by Tuesday. Cloud cover will be extremely minimal the next few days.
The upper level ridge over the western US will weaken somewhat and allow a weak upper level low to sneak through its southwestern side over the weekend. This will result in a closed low developing and moving south and west of the area by the middle of next week. There remains considerable uncertainty in the track and strength of this feature, as is common with closed lows, but there is relatively good agreement in this general progression. In fact, each cluster in the WPC cluster analysis shows this occurring in some form. There is also relatively good agreement that this low will tap into subtropical moisture as it begins to eject northeast towards the southwest US the middle of next week in advance of an approaching west coast trough. Ensemble members which stall this low for longer generally appear more favorable for rainfall in the Phoenix CWA (currently about half of the ensemble members shows this in some capacity), whereas those that eject it more quickly result in wetter conditions further to the east. The uncertainty in the track and timing is primarily related to uncertainties about the strength and amplitude of the ridge over the northern Rockies and the aforementioned advancing trough along the west coast. These details should become more clear in the coming days, but in the meantime model shifts in the track of the low will remain possible. At a minimum, it does appear likely that we will see lowering temperatures and increasing cloud cover the second half of next week, regardless of whether rainfall occurs in the area.
AVIATION. Updated at 2333Z.
South-Central Arizona including KPHX, KIWA, KSDL, and KDVT: Southeast California/Southwest Arizona including KIPL and KBLH:
No aviation weather concerns expected. Light, diurnal winds will prevail through Saturday under clear skies. Wind speeds at all sites should remain near 6 kts or less. Extended periods of light/variable winds are likely to occur as well.
FIRE WEATHER. Sunday through Thursday: Anticipate lighter winds from Sunday into next week favoring mostly typical diurnal patterns. Morning temperatures will remain near normal. Afternoon temperatures will be above normal, rising from the low 70s Sunday into the upper 70s by the middle of next week for most lower desert locations. Minimum humidities will be in the 10-20% range for most locations with overnight recoveries in the 25-45% range. A potential weather system late next week may bring increasing moisture and rain chances by Thursday.
SPOTTER INFORMATION STATEMENT. Spotters should follow standard reporting procedures.
PSR WATCHES/WARNINGS/ADVISORIES. AZ . Freeze Warning from midnight tonight to 8 AM MST Saturday for AZZ530-533-536.
CA . Freeze Warning from 11 PM this evening to 7 AM PST Saturday for CAZ569.
DISCUSSION . Hodges/Kuhlman AVIATION . Percha/Hodges/Hirsch FIRE WEATHER . Kuhlman
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Palm Springs, Jacqueline Cochran Regional Airport, CA||27 mi||41 min||SSE 4||10.00 mi||Fair||69°F||18°F||14%||1020.6 hPa|
Link to 5 minute data for KTRM
Wind History from TRM (wind in knots)
|1 day ago||Calm||NE||Calm||Calm||N||NW||N||N||NE|
|2 days ago||Calm||Calm||N||N||NW||N||Calm||N||Calm||Calm||N||W||Calm||NW||N||NW||W||Calm||SE||N||E||W||W||Calm|
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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
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