SPDSS_Task53-2_Collect and Fill Missing Monthly Climate Data

• Title: SPDSS Task 53.2 - Collect and Fill Missing Monthly Climate Data
• Description: SPDSS Task 53.2 –Collect and Fill Missing Monthly Climate Data memo discusses the identification of and filling techniques for the key climate stations selected to represent climatic conditions throughout the South Platte, North Platte and Laramie River basins ‎(SPDSS study area)‎.
• Decision Support - Doc Type: Task Memorandum
• Date: 2/7/2005
• DSS Category: Consumptive Use
• DSS: South Platte
• Basin: South Platte
• Contract/PO #: C153954
• Grant Type: Non-Reimbursable
• Bill Number: SB01-157, HB02-1152, SB03-110, HB04-1221, SB05-084, HB06-1313, SB07-122
• Prepared By: Leonard Rice Engineering

Table 7
Filled Average Annual Frost Dates
(1950 - 2003)

No. Station
ID
Station Name Spring 28°
Frost Date Spring 32°
Frost Date Fall 32°
Frost Date Fall 28°
Frost Date
1 109 Akron 4 E (combined) 04/30 05/12 09/28 10/09
2 185 Allenspark 1 NW (combined) 05/26 06/11 08/27 09/19
3 263 Antero Reservoir 06/10 06/22 08/04 09/01
4 454 Bailey 06/01 06/15 08/23 09/13
5 848 Boulder 04/21 05/04 10/OS 10/16
6 945 Briggsdale 05/03 05/14 09/25 10/06
7 1179 Byers 5 ENE OS/O1 05/12 09/27 10/OS
8 1401 Castle Rock OS/OS 05/20 09/25 10/04
9 1528 Cheesman 05/19 06/02 09/09 09/24
10 2220 Denver WSFO AP (Stapleton) 04/22 05/03 10/06 10/18
11 2494 Eastonville 2 NNW No Temperature Data
12 2761 Estes Park 1 SSE (combined) 05/17 06/02 09/12 09/22
13 2790 Evergreen (combined)' 05/16 06/01 09/14 09/25
14 3005 Fort Collins 04/21 05/06 10/O1 10/09
15 3038 Fort Morgan 04/21 05/02 10/03 10/14
16 3261 Georgetown 05/14 05/26 09/20 10/O1
17 3553 Greeley UNC (combined) 04/21 05/06 09/30 10/10
18 4413 Julesburg 04/23 05/06 10/02 10/12
19 4762 Lakewood (combined) 04/28 OS/10 09/30 10/11
20 5116 Longmont 2 ESE 04/26 05/07 09/29 10/09
21 5922 New Raymer 05/02 05/14 09/27 10/06
22 5934 New Raymer 21 N (combined) 05/08 05/20 09/18 09/27
23 6323 Parker 2 N (combined) OS/OS 05/18 09/25 10/04
24 6921 Red Feather Lakes (combined) 05/28 06/11 08/30 09/14
25 7515 Sedgwick 5 S (combined) 04/23 05/04 10/04 10/13
26 7950 Sterling 04/23 05/07 09/29 10/09
27 8756 Walden 06/08 06/22 07/21 08/16
Notes: 1 Evergreen station records are only combined for precipitation.
Recommendations
Several potential enhancements to TSTooI were identified under Task 2 with respect to
regression analyses that would have also been useful under this task. The following additional
potential TSTooI enhancements were identified with respect to filling climate data.
^ Replicate the NOAA method of calculating monthly average temperature and total
precipitation from daily data by ignoring missing data if less than or equal to 9 days are
missing (10 or more missing days would produce an "NC"). The number of missing days
could be auser-specified variable, with the default set to the NOAA criterion of 9 days.
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