Marine Weather and Tides
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
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 6:11AM||Sunset 6:12PM||Monday September 27, 2021 8:57 PM MST (03:57 UTC)||Moonrise 10:27PM||Moonset 12:19PM||Illumination 58%|
7 Day Forecast for Marine Location Near Sierra Vista, AZHourly EDIT Help
Area Discussion for - Tucson, AZ  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS65 KTWC 272128 AFDTWC
Area Forecast Discussion National Weather Service Tucson AZ 228 PM MST Mon Sep 27 2021
SYNOPSIS. A few showers will linger across parts of southern Arizona this evening into Tuesday as a result of the slow departure of the weekend storm system. Another storm will develop over the region late Wednesday through Thursday for another chance of showers and thunderstorms. Afternoon temperatures will remain cooler than average this week thanks to these storm systems.
DISCUSSION. Scattered showers have developed this afternoon from Tucson south and east with another batch of really light showers drifting south across western Pima county. All this activity is rotating around the slowly departing low that is currently centered over west-central NM. Much of this activity will diminish after sunset with clouds decreasing. The exception will be late tonight for areas north and Northeast of Tucson where a vort lobe rotating SE around backside of the low is expected to produce some clouds and showers across Pinal/Graham and Greenlee counties late tonight and early Tuesday morning.
By Tuesday the upper low is moving into Wyoming however there is enough lingering instability and moisture that, despite the distance from the low and weak shortwave ridging, some showers are still possible north and east of Tucson due to daytime heating. They should be light and mainly confined to Graham and Greenlee counties. Temperatures will warm several degrees but still peak around 5 degrees cooler than average.
The next system headed our way will be a longwave trough that will move over the region Wednesday. This trough is expected to split Wednesday night into Thursday with a low pressure center developing over eastern Arizona/western New Mexico Thursday. This will bring another round of scattered showers and thunderstorms to southern Arizona, mainly from Tucson eastward. Over the last three days there has been a slight eastward trend to this low development and if that trend continues the precipitation forecast will have to be shunted a bit further east. Elevating our position in the wettest monsoon standing depends on this storm producing in time. We will see.
Friday into the weekend the low moves off to the east leaving our area under a split zonal flow which will result in dry conditions with near normal temperatures. A bit of potential for some precipitation again early next week in the model world and that is also highlighted in the Above Normal precipitation outlook for AZ in the 6-10 and 8-14 day outlooks.
AVIATION. Valid through 29/00Z. SCT-BKN clouds at 10k-13k ft MSL thru 28/06Z, then slowly decreasing clouds south of a KTUS-KSAD line. ISOLD-SCT -SHRA/-TSRA mainly east of a KCGZ to KTUS to KOLS line thru the forecast period. SFC wind generally less than 12 kts favoring a SWLY/WLY direction in the afternoon/evening hours and variable in direction at other times. Aviation not updated for TAF amendments.
FIRE WEATHER. We should have isolated showers and very isolated thunderstorms through Tuesday. Then showers and storms will increase in coverage again Wednesday night through Thursday before drying out over the weekend. Temperatures will remain below normal through Friday then rise to near normal over the weekend with elevated humidity levels throughout. Winds will remain unexceptional and typical for the time of year.
TWC WATCHES/WARNINGS/ADVISORIES. None.
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|Fort Huachuca, Libby AAF Ft Huachuca, AZ||1 mi||60 min||N 0||10.00 mi||Overcast||66°F||51°F||60%||1013.9 hPa|
|Pioneer Airfield, AZ||7 mi||4 hrs||SW 9||10.00 mi||Overcast||67°F||53°F||61%||1012.8 hPa|
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Wind History from FHU (wind in knots)
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|2 days ago||W||W||SW||W||W||S||S||Calm||NW||S||Calm||Calm||Calm||NE||Calm||Calm||W||Calm||S||SW||W||Calm||W||SE |
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