State Precipitation &
Temperature Update for
Conditions through December
2006
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 1/24/2007. The data are preliminary, and there are some
missing precipitation data in the San Pedro watershed.
Precipitation Percentiles by Watershed
(through December 2006)
Temperature Percentiles by Climate
Division (through December 2006)
SHORT TERM CONDITIONS: 1-6 MONTHS
December precipitation
was near or below average everywhere in the state except in the
Watershed |
Precipitation Percentile |
Climate
Division |
Temperature Percentile |
Virgin |
77.78 |
CD1 |
55.80 |
|
52.78 |
CD2 |
63.84 |
Little |
38.89 |
CD3 |
56.25 |
Verde |
37.14 |
CD4 |
46.43 |
Bill
Williams |
19.44 |
CD5 |
20.09 |
|
27.78 |
CD6 |
26.34 |
|
36.11 |
CD7 |
45.09 |
Salt |
27.78 |
|
|
|
33.33 |
|
|
|
36.11 |
|
|
|
36.11 |
|
|
San Pedro |
38.24 |
|
|
Willcox
Playa |
43.06 |
|
|
San Simon |
25.00 |
|
|
White
Water Draw |
41.67 |
|
DECEMBER 2006: percentiles of precipitation for the 15
Watershed |
Precipitation Percentile |
Climate
Division |
Temperature Percentile |
Virgin |
51.43 |
CD1 |
73.66 |
|
66.67 |
CD2 |
73.21 |
Little |
44.44 |
CD3 |
70.09 |
Verde |
34.29 |
CD4 |
67.86 |
Bill
Williams |
30.56 |
CD5 |
68.30 |
|
16.67 |
CD6 |
79.02 |
|
13.89 |
CD7 |
70.09 |
Salt |
30.56 |
|
|
|
38.89 |
|
|
|
22.22 |
|
|
|
11.11 |
|
|
San Pedro |
20.59 |
|
|
Willcox
Playa |
20.00 |
|
|
San Simon |
5.56 |
|
|
White
Water Draw |
27.78 |
|
OCTOBER 2006 - DECEMBER 2006
(3-month): percentiles of precipitation for
the 15
Watershed |
Precipitation Percentile |
Climate
Division |
Temperature Percentile |
Virgin |
32.35 |
CD1 |
76.79 |
|
55.56 |
CD2 |
60.71 |
Little |
58.33 |
CD3 |
69.20 |
Verde |
48.57 |
CD4 |
54.02 |
Bill
Williams |
22.22 |
CD5 |
83.04 |
|
38.89 |
CD6 |
78.13 |
|
30.56 |
CD7 |
54.46 |
Salt |
44.44 |
|
|
|
55.56 |
|
|
|
58.33 |
|
|
|
61.11 |
|
|
San Pedro |
79.41 |
|
|
Willcox
Playa |
85.71 |
|
|
San Simon |
27.78 |
|
|
White
Water Draw |
65.71 |
|
JULY 2006 – DECEMBER 2006 (6-month): percentiles of precipitation for the 15
INTERMEDIATE
TERM CONDITIONS: 12-24 MONTHS
Precipitation in the 12-month
period is well below average across most of the state, except for the southeast
watersheds which benefited from an extremely wet monsoon. The southeast and south central division is
still the hottest, above the 96th percentile, and the rest of the
state remains above the 77th percentile.
The two-year period
shows only the Upper and Lower Colorado and
Watershed |
Precipitation Percentile |
Climate
Division |
Temperature Percentile |
Virgin |
47.06 |
CD1 |
77.48 |
|
19.44 |
CD2 |
85.14 |
Little |
25.00 |
CD3 |
88.29 |
Verde |
11.11 |
CD4 |
90.99 |
Bill
Williams |
5.56 |
CD5 |
91.89 |
|
11.11 |
CD6 |
93.69 |
|
13.89 |
CD7 |
98.20 |
Salt |
11.11 |
|
|
|
19.44 |
|
|
|
41.67 |
|
|
|
30.56 |
|
|
San Pedro |
47.22 |
|
|
Willcox
Playa |
55.56 |
|
|
San Simon |
5.56 |
|
|
White
Water Draw |
47.22 |
|
JANUARY 2006 – DECEMBER 2006
(12-month): percentiles of precipitation for
the 15
Watershed |
Precipitation Percentile |
Climate
Division |
Temperature Percentile |
Virgin |
81.82 |
CD1 |
75.45 |
|
54.29 |
CD2 |
91.82 |
Little |
34.29 |
CD3 |
88.18 |
Verde |
40.00 |
CD4 |
91.82 |
Bill
Williams |
25.71 |
CD5 |
87.27 |
|
34.29 |
CD6 |
93.64 |
|
42.86 |
CD7 |
99.09 |
Salt |
34.29 |
|
|
|
60.00 |
|
|
|
42.86 |
|
|
|
17.14 |
|
|
San Pedro |
37.14 |
|
|
Willcox
Playa |
42.86 |
|
|
San Simon |
11.43 |
|
|
White
Water Draw |
45.71 |
|
JANUARY 2005 – DECEMBER 2006
(24-month): percentiles of precipitation for
the 15
LONG TERM
CONDITIONS: 36-48 MONTHS
The 36-month precipitation
is well above average in the northern and western watersheds and below average
in the south central watersheds and the Colorado Plateau. The rest of the state is near or above average.
The
The 48-month
precipitation is still split across the state with the eastern half drier than
average and the western half wetter than average. The central watersheds remain near normal. Temperatures are above the 97th
percentile for most of the southern half of the state. The
Watershed |
Precipitation Percentile |
Climate
Division |
Temperature Percentile |
Virgin |
90.62 |
CD1 |
76.15 |
|
73.53 |
CD2 |
90.83 |
Little |
38.24 |
CD3 |
88.99 |
Verde |
55.88 |
CD4 |
95.41 |
Bill
Williams |
55.88 |
CD5 |
88.07 |
|
47.06 |
CD6 |
92.66 |
|
58.82 |
CD7 |
100.00 |
Salt |
44.12 |
|
|
|
76.47 |
|
|
|
44.12 |
|
|
|
8.82 |
|
|
San Pedro |
44.12 |
|
|
Willcox
Playa |
47.06 |
|
|
San Simon |
14.71 |
|
|
White
Water Draw |
50.00 |
|
JANUARY 2004 – DECEMBER 2006
(36-month): percentiles of temperature, and
precipitation for the 15
Watershed |
Precipitation Percentile |
Climate
Division |
Temperature Percentile |
Virgin |
-99.99 |
CD1 |
77.78 |
|
69.70 |
CD2 |
92.59 |
Little |
18.18 |
CD3 |
94.44 |
Verde |
54.55 |
CD4 |
98.15 |
Bill
Williams |
51.52 |
CD5 |
91.20 |
|
45.45 |
CD6 |
97.22 |
|
60.61 |
CD7 |
100.00 |
Salt |
36.36 |
|
|
|
69.70 |
|
|
|
21.21 |
|
|
|
15.15 |
|
|
San Pedro |
21.21 |
|
|
Willcox
Playa |
18.18 |
|
|
San Simon |
15.15 |
|
|
White
Water Draw |
30.30 |
|
JANUARY 2003 – DECEMBER 2006
(48-month): percentiles of temperature, and
precipitation for the 15
January 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
December was not as dry as November, but most watersheds had
below average precipitation, except the
Three-month period – October through December was also much
drier than average, with the driest watersheds across the southern half of the
state. Temperatures were slightly above
average for most of the state, and above the 75th percentile in
Maricopa and Pinal counties.
Six-month period – July through December, which includes the
wet monsoon, is still above average for the eastern half of the state, and near
or below average for the western half of the state. The extreme monsoon moisture in the San Pedro
and Willcox basins pushed them up above the 79th percentile for this
period. Temperatures were above average
everywhere in the state for the past six months and above the 75th
percentile for the far western and central climate divisions.
Twelve-month period –
precipitation is well below average across most of the state, except for the
southeast watersheds which benefited from an extremely wet monsoon. The southeast-south central division is still
the hottest, above the 96th percentile, and the rest of the state
remains above the 77th percentile.
Two-year period - shows
only the Upper and Lower Colorado and
Three-year period - precipitation
is well above average in the northern and western watersheds and below average
in the south central watersheds and the Colorado Plateau. The rest of the state is near or above
average. The
Four-year period - precipitation
is still split across the state with the eastern half drier than average and
the western half wetter than average.
The central watersheds remain near normal. Temperatures are above the 97th
percentile for most of the southern half of the state. The