
The high today? 21°F
http://www.wrh.noaa.gov/fgz
.DISCUSSION...LONG WAVE TROUGH REMAINS OVER THE WESTERN US THIS WEEKEND AND CONTINUES TO DRAW COLD CANADIAN AND ARCTIC AIR SOUTHWARD INTO THE GREAT BASIN AND ARIZONA. NUMEROUS RECORD LOW TEMPERATURE READINGS ACROSS NRN AZ THIS MORNING WITH -21F RECORDED AT THE NATIONAL WEATHER SERVICE OFFICE...-15F AT THE FLAGSTAFF AIRPORT...AND -10F AT THE GRAND CANYON AIRPORT. UPPER AIR SOUNDING SHOWS THE COLD AIR IS QUITE DEEP AND DAYTIME HEATING HAS STRUGGLED TO WARM THE REGION.