Monthly air quality forecast report for ...

              MONTHLY AIR QUALITY REPORT FOR
OCTOBER 2003
AQI COLOR SCALE
GOOD
0-50
MODERATE
51-100
UNHEALTHY FOR
SENSITIVE GROUPS
101-150
UNHEALTHY
151-200
POLLUTANT REPORTING BOX MODEL
O3
CO
1
(date)
PM10
PM2.5
Calendar of maximum AQI values & corresponding scale color for October 2003*
*Preliminary data
SUN MON TUES WED THU FRI SAT
59
17
41
18
42
10
45
27
1
52
29
2
52
29
3
41
n/a
4
44
22
45
35
42
31
34
19
44
17
41
25
31
24
50
24
5
45
30
6
52
29
7
46
28
8
43
24
9
47
31
10
16
34
11
29
23
56
27
50
28
54
27
48
35
41
27
46
35
48
40
12
32
25
13
44
28
14
51
29
15
45
27
16
51
28
17
52
30
18
54
31
49
42
48
35
46
36
48
31
51
39
59
45
47
31
19
51
35
20
53
33
21
57
34
22
55
32
23
57
33
24
66
49
25
61
45
39
22
37
40
41
40
42
36
51
38
47
09
26
43
23
27
62
35
28
62
41
29
64
44
30
64
75
31
51
65
**VIOLET FILL INDICATES THAT A HIGH POLLUTION ADVISORY WAS IN EFFECT
____________________________________________________________________________________________________________
Exceedance days during OCT 2003-
Total= 0 Date Max AQI Pollutant Site/s
______________________________________________________________________________________
Health Watches issued during OCT 2003-
Total= 0 Date Max AQI Pollutant Site/s
______________________________________________________________________________________
High Pollution Advisories issued during OCT 2003-
Total= 2 Date Max AQI Pollutant Site/s
10/30 75 PM-2.5 VEI
10/31 65 PM-2.5 Estrella
____________________________________________________________________________________________________________Concentration Recap: Days in the Good category: 11
Days in the Moderate category: 20
Days in the Unhealthy for Sensitive Groups category: 0
Days in the Unhealthy category: 0
Total Forecast Days: 31
______________________________________________________________________________________
Narrative: Summer heat persisted during most of October and record maximum temperatures occurred at Sky Harbor from the 17th thru the 23rd. The 100-degree reading on the 23rd was the latest occurrence ever. The heat probably contributed to the moderate ozone readings between the 12th and the 24th. The high temperatures combined with breezy periods due to a series of weak trough passages prevented any long-term air stagnation with PM and CO readings kept at rather low levels. The only significant pollution episode occurred during the last two days of the month. Extensive smoke caused by wildfires in California was transported mainly over the western half of Arizona by southwest to west winds aloft ahead of a strong upper trough. These winds also carried aloft a good deal of dust and the two combined to increase particulate levels which approached or reached unhealthy levels at times over the local forecast area, mainly on Thursday the 30th. The event was predicted as early as the preceding Monday and timely information was provided to the public via high pollution and smoke advisories. The coordination and subsequent response by all was meritorious. -Reith 8-hour ozone02040608010013579111315171921232527293101-31 October 2003AQI Index Carbon Monoxide02040608010013579111315171921232527293101-31 October 2003AQI IndexPM-1002040608010013579111315171921232527293101-31 October 2003AQI Index PM-2.502040608010013579111315171921232527293101-31 October 2003 AQI Index