FreeLists / az-observing / [AZ-Observing] The Monsoon is Over

[Paul Dickson <dickson@xxxxxxxxxxxxxxxxx>]

It appears that the storm of the past couple of days (a "winter" storm?)
has ended the monsoon.

        -Paul


FXUS65 KPSR 110412
AFDPSR
AZZ020>028-CAZ030>033-111045-

SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX ARIZONA
910 PM MST WED SEP 10 2003

.SYNOPSIS...
HIGH PRESSURE ALOFT WILL REMAIN OFF THE WEST COAST DURING THE NEXT 
SEVERAL DAYS...WHILE A SURFACE HIGH MOVES INTO THE GREAT BASIN. THIS 
WILL PRODUCE A DRY NORTHWESTERLY FLOW ALOFT...WHILE LOWER LEVEL 
WINDS SHIFT TO THE NORTH. THIS WILL RESULT IN MOSTLY CLEAR SKIES 
AND LOWER HUMIDITIES THROUGH THE WEEKEND. AFTERNOON TEMPERATURES 
WILL RISE TO ABOVE MID-SEPTEMBER NORMALS THE NEXT FEW DAYS...WITH 
NIGHTTIME LOWS VERY PLEASANT DUE TO THE VERY DRY AIR. 

.DISCUSSION...
THE MONSOON PATTERN IS THE THING OF THE PAST. AN UPPER LEVEL LOW 
PRESSURE TROUGH MOVING INTO THE ROCKIES AND HIGH PRESSURE ALOFT OFF 
THE WEST COAST WILL PRODUCE A DRY NORTHWEST FLOW OVER THE REGION THE 
NEXT SEVERAL DAYS. THIS COUPLED WITH HIGHER SURFACE PRESSURE MOVING 
INTO THE GREAT BASIN...RESULTING IN LOW LEVEL NORTHERLY WINDS... 
WILL ASSURE A DRY PATTERN FOR AWHILE. STRONG SUBSIDENCE THURSDAY 
WILL WEAKEN ONLY SLIGHTLY FRIDAY...WHILE DRY AIR ADVECTION MOVES IN. 
EVEN THE ETA COMES AROUND AND FINALLY DRIES OUT THE 700MB MOISTURE 
TONIGHT...SOMETHING IT HAS BEEN SLOW TO DO THE PAST FEW RUNS. SEE NO 
REASONS FOR ANY UPDATE. BERKOVITZ

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