Friday, August7, 2020
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Marine Weather and Tides
Catalina Foothills, AZ

Version 3.4
NOTICE
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 5:41AMSunset 7:16PM Friday August 7, 2020 10:50 AM MST (17:50 UTC) Moonrise 9:57PMMoonset 9:20AM Illumination 86% Phase: Waning Gibbous; Moon at 18 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 Catalina Foothills, AZ
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location: 32.29, -110.91     debug


Area Discussion for - Tucson, AZ
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FXUS65 KTWC 071717 AFDTWC

Area Forecast Discussion National Weather Service Tucson AZ 1017 AM MST Fri Aug 7 2020

SYNOPSIS. High pressure over the region will continue to maintain above average heat. Daily thunderstorm chances will also continue, but primarily well south and east of Tucson as a drier southwesterly flow continues to limit thunderstorm activity through the weekend and into early next week.

DISCUSSION. Moisture remains confined to the International Border and struggling to move north. With the lackluster moisture, clouds across SE AZ, and limited instability, expect thunderstorm coverage to remain isolated in nature and focus south and east of Tucson. Similar to yesterday, any outflows needed for convection in the metro will have to battle dry SW flow. Current TDs are in the low 50s to upper 40s, which is rather pathetic for this time of the year. With adequate afternoon mixing, expect these to drop further.

Any shower or storm that develops across far SE AZ will be a mix of wet and dry due to the lack of deep moisture. Some of the storms could see gusty winds due to the inverted v soundings.

Lets talk about heat for today. It seems guidance continues to run 1-3 degrees below actual observations recently. This is likely due to the dry ground, especially around KTUS. So don't be shocked if we sneak up to 105 or 106 again today, which will continue out streak of days greater than 105.

AVIATION. Valid through 08/18Z. SCT to ocnl BKN clouds AOA 10-14k ft MSL through much of the period from KTUS eastward and generally SKC-FEW W of KTUS. Isold to sctd SHRA/TSRA from KTUS south and eastward this afternoon through about 08/03z. SFC winds less than 10 kts this morning becoming SWLY/WLY around 10 kts this afternoon with a few higher gusts. Winds subside again this evening becoming less than 10 kts tonight. Aviation discussion not updated for TAF amendments.

FIRE WEATHER. Above normal temperatures continue through the weekend and into next week. Drier than usual afternoon RHs are likely, due to the lack of monsoon moisture. In general, valley RHs will be in the 10-20 percent range with mountains in the 20-30 percent range. Overnight RH recoveries will be drier than usual as well, with the driest areas in the lower deserts. Slightly better recoveries are expected for the higher valleys south and east of Tucson aligning with the better monsoon moisture. Isolated to scattered mainly afternoon and evening thunderstorms for locales east and south of Tucson into early next week as some drier air moves in from the west. 20-foot winds will generally follow typical diurnal patterns at less than 15 mph. However, thunderstorms may produce wind gusts in excess of 40 mph.

PREV DISCUSSION. /issued 229 AM MST Fri Aug 7 2020/ . We continue to have a southwesterly flow over the area with weak troughiness near the west coast and high pressure over Texas and Chihuahua. Any westerly component involved in our flow is typically a bad thing this time of year unless we're talking about deep tropical moisture (and we aren't). Moisture is relatively limited with surface dewpoints in the 40s to lower 50s and precipitable water values well below normal. You don't frequently see a value under 1 inch in August. Sonora remains busy, but the flow isn't favorable to bring much of that up here.

Ensembles actually strengthen the western flank of the ridge into our area and into a full blocking position over the weekend and into early next week. We might end up needing more heat headlines next week as the Monsoon continues to thrive mainly south of our area. ECMWF weeklies 7 day height anomalies suggest a more favorable pattern the second half of the month. We'll see.

TWC WATCHES/WARNINGS/ADVISORIES. None.



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Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Davis-Monthan Air Force Base, AZ8 mi53 minN 010.00 miOvercast93°F52°F25%1011 hPa
Tucson, Tucson International Airport, AZ12 mi58 minN 010.00 miFair93°F48°F22%1010.9 hPa
Tucson Ryan Field Airport, AZ17 mi66 minN 010.00 miFair93°F46°F20%1015.9 hPa

Link to 5 minute data for KDMA

Wind History from DMA (wind in knots)
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Last 24hrCalmNW4NW10S7SW8
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W7CalmSW10W11W9W7NW8SW6S6S8SE6S7SW4E5E8SE7SE5S5Calm
1 day agoNE5SW4NW5W7W7
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Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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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 Tucson, AZ (13,3,4,5)
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Ground Weather Radar Station Tucson, AZ
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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 numerous 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.