Drought Update September 2005 WATF Meeting

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Drought Update September 2005 WATF Meeting

• Roger A. Pielke, Sr.
• Colorado Climate Center
• presented at the Water Availability Task Force
  meeting,
• Division of Wildlife, Denver, CO, September 14,
  2005
• Prepared by Odie Bliss
• http//ccc.atmos.colostate.edu

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July 2005
http//www.ncdc.noaa.gov/oa/climate/research/2005/
jul/extremes.html
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Colorado Average Temperatures
http//www.ncdc.noaa.gov/oa/climate/research/cag3/
co.html
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Colorado Total Precipitation
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• July 2005 Tmax

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• July 2005 Tmin

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• July 2005 Precipitation

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August 2005
http//www.ncdc.noaa.gov/oa/climate/research/preli
m/drought/st005dv00pcp.html
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http//www.ncdc.noaa.gov/oa/climate/research/preli
m/drought/st005dv00pcp.html
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http//www.ncdc.noaa.gov/oa/climate/research/preli
m/drought/st005dv00pcp.html
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Colorado Precipitation Ranking 1895-2005
http//www.ncdc.noaa.gov/oa/climate/research/preli
m/drought/st005dv00pcp.html
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Climate divisions defined by Dr. Klaus Wolter of
NOAA's Climate Diagnostic Center in Boulder, CO
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Division 1 Grand Lake 1NW
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Division 1 Taylor Park
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Division 2 Collbran
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Division 2 Grand Junction
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Division 3 Montrose
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Division 3 Cochetopa Creek
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Division 3 Mesa Verde
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Division 4 Del Norte
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Division 4 Center 4SSW
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Division 5 Colorado Springs
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Division 5 Pueblo
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Division 5 Buena Vista
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Division 5 Canon City
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Division 6 Cheyenne Wells
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Division 7 Akron
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Division 7 Leroy
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Division 7 Burlington
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Division 8 Boulder
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Division 8 Cheesman
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Division 8 Kassler
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Division 8 Fort Collins
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August 2005 maximum temperatures
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August 2005 Maximum Temperature
http//www.ocs.oregonstate.edu/prism
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August 2005 minimum temperatures
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August 2005 Minimum Temperature
http//www.ocs.oregonstate.edu/prism
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August 2005 Average Temperatures
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August 2005 precipitation
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August 2005 Precipitation
http//www.ocs.oregonstate.edu/prism
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WY 2005 precipitation
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3 Month SPI
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12 Month SPI
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48 Month SPI
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Fraction of Colorado in Drought
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Projected Conditions at 0.2 Probability Level 12
Month SPI at 6 months
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Projected Conditions at 0.5 Probability Level 12
Month SPI at 6 months
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Projected Conditions at 0.8 Probability Level 12
Month SPI at 6 months
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Projected Conditions at 0.2 Probability Level 48
Month SPI at 12 months
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Projected Conditions at 0.5 Probability Level 48
Month SPI at 12 months
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Projected Conditions at 0.8 Probability Level 48
Month SPI at 12 months
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Drought Monitor Map
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July 2005 Heat Wave
Highest maximum temperature recorded in Colorado
in July 2005 for selected stations.
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Colorado Springs, DIA, Grand Junction and Fort
Collins daily maximum and minimum temperatures
for July 2005.
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Denver Intl AP July 2005 Records
Data Source NWS F-6 form
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Table 1. Average maximum, minimum and mean
temperatures for July 2005 and their rank for the
period-of-record.
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Table 1 continued
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Table 2. Number of Days that the July 2005
maximum temperature was greater than or equal to
90?F and 100?F and their rank for the
period-of-record.
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Table 3. July 2005 highest maximum temperature,
the rank for the period-of-record, the date it
occurred, the highest ever July temperature and
the year it occurred, and the absolute maximum
temperature and the date.
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Table 3. continued
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Denvers 5-day running average if the average
temperature was greater than or equal to 83?F or
greater. Plotted by decade.
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Edgewater and Lakewood 5-day running average for
average temperature greater than or equal to 80
deg F.
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Fort Collins 5-day running average for average
temperature greater than or equal to 80 deg F.
The Bus Transfort construction begin in 2002 next
to this station.
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Hourly data from automated weather stations at
FCL and DIA are used to pick and calculate the
highest air temperature and effective temperature
for each day in July 2002. In all three months,
the average high air temperature is higher at
DIA, while the average high effective temperature
is higher at FCL.
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Hourly data from automated weather stations at
FCL and DIA are used to pick and calculate the
highest air temperature and effective temperature
for each day in July 2003. In all three months,
the average high air temperature is higher at
DIA, while the average high effective temperature
is higher at FCL.
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Hourly data from automated weather stations at
FCL and DIA are used to pick and calculate the
highest air temperature and effective temperature
for each day in July 2005. In all three months,
the average high air temperature is higher at
DIA, while the average high effective temperature
is higher at FCL.
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A daily composite of air temperature (red line)
and effective temperature (blue line). The
composite is created by averaging hourly data
during the five days with highest air temperature
in each of the three years considered in this
section fifteen days total. This shows the
pattern of heating and cooling on the stations
extreme hottest days. Note how the effective
temperature peaks approximately four hours before
the air temperature peaks. Typically, the
hottest days are characterized by exceptionally
low relative humidity in the late afternoon,
which explains the premature drop in effective
temperature.
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Colorado Climate CenterColorado State University

• Data and Power Point Presentations available for
  downloading
• http//ccc.atmos.colostate.edu
• click on Drought
• then click on Presentations