Issued by NWS Tucson, AZ
000 FXUS65 KTWC 212001 AFDTWC AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 115 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. && .DISCUSSION...TROUGH DIGGING INTO THE INTERMOUNTAIN WEST WITH ENERGY AND MOISTURE TRACKING WELL NORTH OF OUR AREA. MODEST GRADIENT ENHANCEMENT...PROBABLY WON`T SEE MUCH DIFFERENCE COMPARED TO NORMAL DIURNAL TRENDS. SHORTWAVE RIDGE WITH LITTLE INFLECTION SUNDAY BEFORE ANOTHER IMPULSE RIDES THROUGH WELL NORTH OF THE AREA SUNDAY NIGHT. DIRTY RIDGE FOR MUCH OF THE NEW WEEK...BUT ACTUAL HEIGHT AND THICKNESS GAINS WILL NOT BE THAT UNSEASONABLE. JUST A FEW DEGREES ABOVE CLIMO. DRY AND RELATIVELY MILD UNTIL FURTHER NOTICE. && .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. && .FIRE WEATHER...A WEATHER SYSTEM WILL MOVE ACROSS THE GREAT BASIN TODAY WITH A STRONGER SYSTEM EXPECTED TO MOVE THROUGH THE NORTHERN ROCKIES ON SUNDAY. THESE SYSTEMS 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 TODAY AND SUNDAY...HOWEVER...WINDS ARE EXPECTED TO REMAIN WELL BELOW CRITICAL FIRE WEATHER THRESHOLDS. && .TWC WATCHES/WARNINGS/ADVISORIES...NONE. $$ WEATHER.GOV/TUCSON
