

http://www.wrh.noaa.gov/fgz
DISCUSSION...STRONG COLD FRONT ON THE WAY INTO ARIZONA TODAY AND TONIGHT AS YET ANOTHER COLD TROUGH WORKS THROUGH THE GREAT BASIN. WINDS AHEAD OF THE FRONT WILL REACH ADVISORY CRITERIA ACROSS MANY OF THE FLAGSTAFF ZONES TODAY...THE ONLY EXCEPTION BEING THE LOWER ELEVATION ZONES SOUTH OF THE RIM. MOISTURE IS LIMITED WITH THIS SYSTEM...BUT STRONG DYNAMICS...UPSLOPE FLOW...AND INCREASING INSTABILITY WILL COMBINE FOR SCATTERED SHOWERS AND THUNDERSTORMS BY THIS AFTERNOON. BY THE EVENING...COLDER MID LEVELS AIR WORKS INTO THE AREA WITH THE THREAT OF CONVECTION LINGERING INTO WEDNESDAY. THE COLDEST AIR WILL ARRIVE OVERNIGHT TONIGHT AND EARLY WEDNESDAY WITH SNOW LEVELS BRIEFLY FALLING TO AROUND 7000 FEET FROM FLAGSTAFF NORTHWARD. THE SYSTEM SLOWLY MOVES NORTH BY WEDNESDAY AFTERNOON AND THURSDAY...WITH THE THREAT FOR SHOWERS DECREASING. HGHTS RECOVER THURSDAY...WITH RIDGING INTO NEXT WEEKEND...LOOKS LIKE AN ACTUAL WARMING TREND AND LIGHT WINDS ON THE HORIZON. PETERSON.