National Weather Service Tucson Arizona
AREA FORECAST DISCUSSION
FXUS65 KTWC 082052 AFDTWC AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 152 PM MST FRI MAY 8 2009 .SYNOPSIS...HIGH PRESSURE ALOFT WILL BRING DRY WEATHER AND MUCH ABOVE NORMAL TEMPERATURES TO SOUTHERN ARIZONA THROUGH THE MIDDLE OF NEXT WEEK. && .DISCUSSION...ANOTHER HOT 100 PLUS DEGREE DAY ACROSS MUCH OF SOUTHEAST ARIZONA THIS AFTERNOON UNDER THE INFLUENCE OF A SUBTROPICAL RIDGE OF HIGH PRESSURE TO OUR SOUTH WITH A FEW BREEZES. THIS RIDGE WILL REMAIN IN CONTROL OF OUR WEATHER THROUGH THE UPCOMING WEEKEND WITH DRY WEATHER AND HIGH TEMPERATURES AVERAGING 8 TO 13 DEGREES ABOVE NORMAL INTO THE EARLY PART OF NEXT WEEK. THERE WILL BE A FEW WEAK SHORTWAVE DISTURBANCES THAT MOVE THROUGH FROM TIME TO TIME BRINGING A FEW HIGH CLOUDS...THE MOST NOTABLE ONE LATE MONDAY NIGHT INTO TUESDAY. HOWEVER...HEIGHTS AND THICKNESSES ONLY NUDGE DOWN EVER SO SLIGHTLY...THUS ONLY EXPECTING PERHAPS A DEGREE OR TWO OF COOLING BY THE MIDDLE OF NEXT WEEK. && .FIRE WEATHER...STRONG HIGH PRESSURE ALOFT WILL BRING DRY CONDITIONS INTO NEXT WEEK. DAILY MINIMUM RELATIVE HUMIDITIES WILL BE LESS THAN 15 PERCENT...AND NIGHTTIME RECOVERIES WILL BE POOR. 20-FOOT WINDS WILL BE MOSTLY LESS THAN 15 MPH ALTHOUGH EXPECT SOME GUSTS DURING THE AFTERNOONS AND EARLY EVENINGS DUE TO STRONG DAYTIME HEATING. && .AVIATION...CLEAR SKIES WILL CONTINUE UNDER HIGH PRESSURE. NORMAL DIURNAL WIND TRENDS ENHANCED TO BREEZY LEVELS AT TIMES IN THE AFTERNOONS WITH STRONG HEATING. AVIATION DISCUSSION NOT UPDATED FOR TAF AMENDMENTS. && .TWC WATCHES/WARNINGS/ADVISORIES...NONE.
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