AREA FORECAST DISCUSSION

 
 FXUS65 KTWC 220337
 AFDTWC
 
 AREA FORECAST DISCUSSION
 NATIONAL WEATHER SERVICE TUCSON AZ
 837 PM MST SAT NOV 21 2009
 
 .SYNOPSIS...WEATHER SYSTEMS WILL CONTINUE TO PASS NORTH OF OUR AREA. 
 OTHER THAN SOME OCCASIONAL PATCHES OF HIGH CLOUDS...SOUTHEAST 
 ARIZONA WILL REMAIN DRY WITH MOSTLY CLEAR SKIES AND WARM DAYTIME 
 TEMPERATURES.
 
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 .DISCUSSION...ANOTHER WARM DAY ACROSS SOUTHEAST ARIZONA TODAY WITH 
 HIGH TEMPERATURES ABOUT 5 TO 9 DEGREES ABOVE NORMAL. LATEST WV 
 IMAGERY SHOWS A TROUGH OF LOW PRESSURE EXTENDING FROM WESTERN 
 MONTANA THROUGH UTAH WITH THE TAIL END INTO ARIZONA. WITH THE BULK 
 OF THE ENERGY WELL TO THE NORTH...WE`RE NOT SEEING MUCH THIS FAR 
 SOUTH EXCEPT FOR A FEW CIRRUS CLOUDS DROPPING SOUTH AND EAST ACROSS 
 SOUTH CENTRAL ARIZONA. THESE CIRRUS CLOUDS WILL CLIP THE FORECAST 
 AREA THE NEXT SEVERAL HOURS. OTHERWISE...NO REAL SENSIBLE WEATHER 
 ISSUES IN THE FORECAST AS DRY WESTERLY FLOW CONTINUES SUNDAY WITH 
 TEMPERATURES A FEW DEGREES LOWER THAN TODAY. NO PLANNED UPDATES THIS 
 EVENING. 
 
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 .AVIATION...SKC-FEW CLOUDS MAINLY ABOVE 20K FT AGL THROUGH 12Z 
 SUNDAY MORNING. NORMAL DIURNAL WIND TRENDS ARE EXPECTED AT THE 
 TERMINAL SITES...WITH SURFACE WINDS GENERALLY LESS THAN 10 KTS. 
 AVIATION DISCUSSION NOT UPDATED FOR TAF AMENDMENTS.
 
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 .FIRE WEATHER...A WEATHER SYSTEM WILL MOVE ACROSS THE NORTHERN 
 ROCKIES ON SUNDAY. THIS SYSTEM WILL RESULT IN A LITTLE COOLER 
 DAYTIME TEMPERATURES ACROSS SOUTHEAST ARIZONA...AS DRY CONDITIONS 
 CONTINUE. THERE MAY BE SOME AFTERNOON AND EARLY EVENING BREEZES 
 ACROSS THE HIGHER TERRAIN TO THE NORTH AND EAST OF TUCSON 
 SUNDAY...HOWEVER...WINDS ARE EXPECTED TO REMAIN WELL BELOW CRITICAL 
 FIRE WEATHER THRESHOLDS.
 
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 .TWC WATCHES/WARNINGS/ADVISORIES...NONE.
 
 

 
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