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Monsoon Information Page
This page is provided to give a general overview of some of the elements associated with the Monsoon Season, More complete information is provided by the NWS Tucson here. Please refer to the Monsoon Help Page for insight into these features
The Current Month NWS Dewpoint Tracker.  Dewpoint is an indication of the amount of moisture in the air.  During the monsoon season, dewpoints in the singles, teens and 20s are considered very dry, the 30s somewhat dry while 40s into the 50s more moist and 60s or higher very moist.  Storms are more likely the higher the dewpoint and heavy rains are more likely with very high dewpoints.  Please note..these readings are measured at the surface an it is very common to have very moist air at the surface in a shallow layer with dry air at mid and upper levels especially early in the season.
 
NWS Tucson's Dewpoint Tracker map for Tucson International Airport
NWS Dewpoint Tracker (current month)
 


Current Images
NWS Tucson Radar Loop Water Vapor Satellite Image centered on Arizona Colorized Infrared Satellite Image centered on Southern Arizona
NWS Tucson Radar Loop Current Water Vapor Image Current Infrared Satellite Image
     
     

Arizona Dewpoint Analysis
These maps are updated on a rotating basis with a complete reset around 6am and 6pm daily.  The full four analysis maps are available at around 5am and 5pm daily and are an excellent way to track moisture surges in the region.  Whites and purples show drier air with greens, yellows and oranges showing moist air.

Map 1 Map 2 Map 3
Arizona Dewpoint Analysis Arizona Dewpoint Analysis Arizona Dewpoint Analysis
Map 4 Map 2 Map 3
Arizona Dewpoint Analysis    

The Current 500 MB Chart for the East Pacific Mexico & Southwest U.S.

The 500 MB chart shows weather systems at about the mid levels of the atmosphere or about 18,000 ft above sea level.   This is a much wider view than the image below, with this image covering an area between 90W and 170W between 45N and 25S.  The wind barbs point into the direction of the wind.
 

NWS Tucson's Dewpoint Tracker map for Tucson International Airport
500 MB Chart for the East Pacific/West U.S.
 


The Current 500 MB Chart for the East Pacific Mexico & Southwest U.S.

The 500 MB chart shows weather systems at about the mid levels of the atmosphere or about 18,000 ft above sea level.   Features seen here include centers of higher and lower pressure aloft.  The higher the number, "586" for example shows higher pressure.
 

500 MB Chart for Southwest U.S.
500 MB Chart for the Southwest U.S.
 


The Current 700 MB Chart for the East Pacific Mexico & Southwest U.S.

This chart shows the flow of winds between 9,000 and 11,000 feet.  Flow of the air at this level will usually show which direction the storms will move in and how fast, like leaves following the current of a stream.  If you know where a group of storms are, use the arrows to tell you what direction they are moving in. The color chart shows the wind speed and the lines and arrows wind direction.
 

500 MB Wind Flow Chart for Southwest U.S.
500 MB Wind Flow Chart for the Southwest U.S.
 

The current 700 MB Chart for the East Pacific Mexico & Southwest U.S.

The 500 MB chart shows weather systems at about the mid levels of the atmosphere or about 18,000 ft above sea level.   Features seen here include centers of higher and lower pressure aloft.  The higher the number, "586" for example shows higher pressure.
 

700 MB Wind Flow Chart for Southwest U.S.
700 MB Chart for the Southwest U.S.
 

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Last Update: Sunday August 03, 2008 14:47:20 -0700

Monsoon Information Page


Internet  Weather Service
Tucson, AZ  85743
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This website utilizes data produced by the U.S. National Weather Service, U.S. Navy and other regional and global weather information organizations.  This site is in no way affiliated with any of these agencies.