Sunday, April18, 2021
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Marine Weather and Tides
Willcox, AZ

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 5:48AMSunset 6:55PM Sunday April 18, 2021 1:48 PM MST (20:48 UTC) Moonrise 10:10AMMoonset 12:09AM Illumination 43% Phase: First Quarter Moon; Moon at 7 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 Willcox, AZ
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Area Discussion for - Tucson, AZ
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FXUS65 KTWC 181031 AFDTWC

Area Forecast Discussion National Weather Service Tucson AZ 332 AM MST Sun Apr 18 2021

SYNOPSIS. A weather system dropping in from the north will result in a chance of a few showers to the east of Tucson mainly this afternoon through tonight, then right along the New Mexico border Monday. Drier conditions and above normal temperatures return Tuesday and Wednesday with some increase in afternoon winds by Wednesday and Thursday. Slightly cooler temperatures are expected for the end of the work week.

DISCUSSION. Latest WV/IR satellite imagery shows a closed low across northern Arizona and the Four Corners region. This system will drop to the south-southwest over the next 12 to 24 hours across Arizona. Meanwhile, at the surface, a backdoor cold front continues to push to the west across Graham and Cochise county. This boundary will continue to move west this morning with some gusty east to southeast winds developing later this morning in the usual windy spots of the southern and eastern sections of the Tucson Metro in a gap wind event. As the aforementioned upper low digs southward, a few showers are possible primarily across Graham, Greenlee and Cochise Counties this afternoon through tonight with dry conditions prevailing from Tucson westward. Given how moisture starved this system is, rainfall amounts will generally be light with less than 0.10" for most locales. We can't rule out a lightning strike or two this afternoon, mainly in the White Mountains. By late tonight and Monday morning, the upper low will be located across far NE Sonora and will eject eastward into Chihuahua with any lingering shower chances along the New Mexico border diminishing Monday morning with dry conditions elsewhere across southeast Arizona on Monday. Expect temperatures to remain near seasonal normals through Monday.

By Tuesday, ensembles are showing some modest shortwave ridging as heights increase. Therefore, expect temperatures to warm up about 5 degrees compared to Monday. For Wednesday, these warm temperatures remain as the pressure gradient starts to tighten as some troughiness develops across the Great Basin. This will bring an increase in afternoon winds starting Wednesday afternoon. As the southern tail end of this system likely moves through Arizona for Thursday into Friday, expect continued afternoon gusty winds especially on Thursday with continued afternoon winds on Thursday as temperatures drop to seasonable normals. As is usually the case this time of year there is no real moisture to work with this far south, so the main concerns will be Fire Weather related Wednesday and Thursday given the increased winds and dry conditions. Any cool-down Thursday and Friday will be short lived as stronger ridging builds in next weekend and highs in the 90's return for Tucson.

AVIATION. Valid through 19/12Z. Low pressure system and a cold front approaching from the north, will develop SCT-BKN clouds around 15k ft MSL and rain chances over eastern portions of our area. Chance for TS in the White Mountains from 19/18Z-20/00Z. FEW-SCT clouds are expected as far west as Sells by 19/03Z. SKC returns from west to east by end of period. ELY-SELY winds 10-20 KT expected over eastern areas til 19/20Z,then shifting to NWLY-NELY 10-15 KT thru 19/05Z. SELY winds 10-15 kts return aft 19/10Z.

FIRE WEATHER. A low pressure system and a cold front will continue to approach from the north, bringing increased winds this morning and chances for showers across eastern sections of our area this afternoon through tonight. The threat for lightning exists for the the White Mountains this afternon. Dry conditions resume from west to east during the pre-dawn hours Monday as northwest flow returns to the region. Min RH today and Monday will range from the high single digits in the deserts, to middle 20s across some of the higher mountain peaks east of Tucson. Very low RH values will be with us for much of this week with a weather system resulting in increased winds, especially Wednesday and Thursday afternoon. This may result in critical fire weather conditions during this time.

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
Safford, Safford Municipal Airport, AZ43 mi58 minESE 10 G 1510.00 miA Few Clouds70°F31°F23%1011.4 hPa

Link to 5 minute data for KSAD

Wind History from SAD (wind in knots)
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Last 24hrS4NW8NW13
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NW12NW14NW13NW4NW4E8SE12S10S7SE6S7S11SE13S16S16
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1 day agoN5N6NW10
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N8NW12NW8NW10N7NW7N4NW9S6S5E3CalmSE3CalmS34SE5S5CalmW8
2 days agoNW22
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NW15NW12NW12NW11NW9NW8NW7NW7NW7N8N5--W6W4CalmSW453W9

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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