State Precipitation &
Temperature Update for
Conditions through September
2007
Precipitation
is monitored for the state of
Here, precipitation
percentile values for the most recent month, along with previous 3-, 6-, 12-,
24-, 36-, and 48-month total are shown for each watershed. Low percentile values (brown shading) indicate
dry conditions while high values (green shading) indicate wet conditions. For
example, a precipitation total that falls at the 100th percentile
means that it is the highest precipitation total for the 1971-present period.
Temperature is monitored for the state of
Here, temperature
percentile values for the most recent month, along with previous 3-, 6-, 12-,
24-, 36-, and 48-month averages are shown for each climate division. Low percentile values (blue shading) indicate
cool conditions while high values (orange/red shading) indicate hot conditions.
For example, a temperature that falls at the 100th percentile means
that it is the highest average temperature for the 1895-present period.
The maps of the seven
periods for precipitation and temperature are shown below, with tables of the
percentile values and descriptive text following the maps. Current update is 10/21/2007. The data are preliminary, and there are no
data for the
Precipitation Percentiles by Watershed
(through September 2007)
Temperature Percentiles by Climate
Division (through September 2007)
SHORT TERM CONDITIONS: 1-6 MONTHS
September can be
either wet or dry, depending on when the monsoon ends, and whether moisture
from eastern Pacific hurricanes is drawn into the state. This year’s monsoon brought average to above
average precipitation to all watersheds except those in the southeast. The Salt and Verde watersheds received above
average precipitation, while the Upper Gila had well below average
precipitation, and the San Pedro, Whitewater Draw and Willcox Play had slightly
below average precipitation. All the
other watersheds have average precipitation.
Temperatures were somewhat cooler in September then in previous
months. Yavapai,
Watershed |
Precipitation Percentile |
Climate
Division |
Temperature Percentile |
Virgin |
-99 |
CD1 |
90.27 |
|
54.05 |
CD2 |
84.07 |
Little |
43.24 |
CD3 |
69.91 |
Verde |
62.16 |
CD4 |
82.30 |
Bill Williams |
45.95 |
CD5 |
63.72 |
|
40.54 |
CD6 |
92.04 |
|
48.65 |
CD7 |
79.65 |
Salt |
64.86 |
|
|
|
45.95 |
|
|
|
24.32 |
|
|
|
40.54 |
|
|
San Pedro |
35.14 |
|
|
Willcox
Playa |
35.14 |
|
|
San Simon |
40.54 |
|
|
White
Water Draw |
37.84 |
|
SEPTEMBER 2007: percentiles of precipitation for the 15
Watershed |
Precipitation Percentile |
Climate
Division |
Temperature Percentile |
Virgin |
-99 |
CD1 |
94.69 |
|
83.78 |
CD2 |
94.69 |
Little |
86.49 |
CD3 |
94.69 |
Verde |
86.49 |
CD4 |
97.35 |
Bill
Williams |
70.27 |
CD5 |
92.04 |
|
51.35 |
CD6 |
99.12 |
|
86.49 |
CD7 |
90.27 |
Salt |
67.57 |
|
|
|
70.27 |
|
|
|
70.27 |
|
|
|
51.35 |
|
|
San Pedro |
54.05 |
|
|
Willcox
Playa |
56.76 |
|
|
San Simon |
54.05 |
|
|
White Water
Draw |
52.78 |
|
JULY 2006 - SEPTEMBER 2007 (3-month): percentiles of precipitation for the 15
Watershed |
Precipitation Percentile |
Climate
Division |
Temperature Percentile |
Virgin |
-99 |
CD1 |
93.81 |
|
72.97 |
CD2 |
95.58 |
Little |
67.57 |
CD3 |
96.46 |
Verde |
64.86 |
CD4 |
96.46 |
Bill
Williams |
56.76 |
CD5 |
90.27 |
|
40.54 |
CD6 |
97.35 |
|
86.49 |
CD7 |
93.81 |
Salt |
64.86 |
|
|
|
67.57 |
|
|
|
64.86 |
|
|
|
45.95 |
|
|
San Pedro |
43.24 |
|
|
Willcox
Playa |
56.76 |
|
|
San Simon |
48.65 |
|
|
White
Water Draw |
55.56 |
|
APRIL 2006 – SEPTEMBER 2007
(6-month): percentiles of precipitation for
the 15
INTERMEDIATE
TERM CONDITIONS: 12-24 MONTHS
The 12-month period had
average precipitation in the upper
The two year period
continues to show the driest conditions of all periods. The Bill Williams and Agua Fria watersheds in
central
Watershed |
Precipitation Percentile |
Climate
Division |
Temperature Percentile |
Virgin |
-99 |
CD1 |
85.71 |
|
50.00 |
CD2 |
87.05 |
Little |
27.78 |
CD3 |
91.96 |
Verde |
25.00 |
CD4 |
91.07 |
Bill
Williams |
19.44 |
CD5 |
86.61 |
|
13.89 |
CD6 |
91.96 |
|
41.67 |
CD7 |
94.64 |
Salt |
27.78 |
|
|
|
33.33 |
|
|
|
41.67 |
|
|
|
8.33 |
|
|
San Pedro |
25.00 |
|
|
Willcox
Playa |
31.43 |
|
|
San Simon |
11.11 |
|
|
White
Water Draw |
44.44 |
|
OCTOBER 2006 – SEPTEMBER 2007
(12-month): percentiles of precipitation for
the 15
Watershed |
Precipitation Percentile |
Climate
Division |
Temperature Percentile |
Virgin |
-99 |
CD1 |
82.88 |
|
17.14 |
CD2 |
92.79 |
Little |
20.00 |
CD3 |
91.89 |
Verde |
11.43 |
CD4 |
93.69 |
Bill
Williams |
2.86 |
CD5 |
90.99 |
|
2.86 |
CD6 |
96.40 |
|
20.00 |
CD7 |
100.00 |
Salt |
8.57 |
|
|
|
25.71 |
|
|
|
22.86 |
|
|
|
2.86 |
|
|
San Pedro |
31.43 |
|
|
Willcox
Playa |
48.57 |
|
|
San Simon |
2.86 |
|
|
White
Water Draw |
40.00 |
|
OCTOBER 2005 – SEPTEMBER 2007
(24-month): percentiles of precipitation for
the 15
LONG TERM
CONDITIONS: 36-48 MONTHS
The 36-month precipitation
period still shows the results of the wet winter of 2004-05 in northern and
western
The 48-month period
precipitation is also above average across the northern part of the state, and
well below average in south central
Watershed |
Precipitation Percentile |
Climate
Division |
Temperature Percentile |
Virgin |
-99 |
CD1 |
76.36 |
|
67.65 |
CD2 |
91.82 |
Little |
41.18 |
CD3 |
90.00 |
Verde |
52.94 |
CD4 |
94.55 |
Bill
Williams |
44.12 |
CD5 |
84.55 |
|
47.06 |
CD6 |
95.45 |
|
64.71 |
CD7 |
100.00 |
Salt |
38.24 |
|
|
|
85.29 |
|
|
|
50.00 |
|
|
|
11.76 |
|
|
San Pedro |
26.47 |
|
|
Willcox
Playa |
41.18 |
|
|
San Simon |
11.76 |
|
|
White
Water Draw |
50.00 |
|
OCTOBER 2004 – SEPTEMBER 2007
(36-month): percentiles of temperature, and
precipitation for the 15
Watershed |
Precipitation Percentile |
Climate
Division |
Temperature Percentile |
Virgin |
-99 |
CD1 |
77.98 |
|
69.70 |
CD2 |
90.37 |
Little |
27.27 |
CD3 |
93.58 |
Verde |
45.45 |
CD4 |
96.33 |
Bill
Williams |
36.36 |
CD5 |
88.07 |
|
21.21 |
CD6 |
98.17 |
|
42.42 |
CD7 |
100.00 |
Salt |
27.27 |
|
|
|
69.70 |
|
|
|
36.36 |
|
|
|
3.03 |
|
|
San Pedro |
27.27 |
|
|
Willcox
Playa |
39.39 |
|
|
San Simon |
9.09 |
|
|
White
Water Draw |
51.52 |
|
OCTOBER 2003 – SEPTEMBER 2007
(48-month): percentiles of temperature, and
precipitation for the 15
October 2007
The
following summary describes the heat and dryness across the state for the 1-,
3-, 6-, 12-, 24-, 36-, and 48-month periods.
SUMMARY
September
can be either wet or dry, depending on when the monsoon ends, and whether
moisture from eastern Pacific hurricanes is drawn into the state. This year’s monsoon brought average to above
average precipitation to all watersheds except in the southeast. The Salt and Verde watersheds received above
average precipitation, while the Upper Gila had well below average
precipitation, and the San Pedro, Whitewater Draw and Willcox Play had slightly
below average precipitation. All the
other watersheds have average precipitation.
Temperatures were somewhat cooler in September then in previous
months. Yavapai,
The 3-month period,
covering the monsoon, brought above average precipitation to most of the
state. The southeast had near average
precipitation, while the northern watersheds were above the 83rd
percentile. The wet monsoon kept
temperatures from rising too far above average.
The entire state was above the 90th percentile, and Maricopa,
Pinal and Gila counties were above the 97th percentile.
The 6-month period
had above average rainfall in the north, along the lower
The 12-month period
had average precipitation in the upper
The two year period
continues to show the driest conditions of all periods. The Bill Williams and Agua Fria watersheds in
central
The 36-month
precipitation period still shows the results of the wet winter of 2004-05 in
northern and western
The 48-month period
precipitation is also above average across the northern part of the state, and
well below average in south central