Atch 1 - Local Weather Data.pdf
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- Attached to
- 35 CES Evaporator Unit
- Solicitation number
- FA520525QB064
About this file
This document is an Operational Climatic Data Summary (OCDS) for a water conservation pond at Misawa Air Base, Japan, supporting a Request for Quote (RFQ) for an Evaporator Unit. The detailed weather data provides comprehensive climate information for the 35th Civil Engineer Squadron, covering temperature, precipitation, moisture, wind, pressure, and cloud cover from 1948-2023. The pond is 21 meters long, 23.91 meters wide, and 2 meters deep, lined, and has potential overspray concerns, with water sourced from stormwater and temperatures ranging from 10-25 degrees Celsius.
The climate data reveals significant annual variations, including an average annual temperature of 50°F, with 110 days below freezing and 5 days above 90°F. Precipitation averages 40.5 inches annually, with monthly snowfall reaching up to 97.8 inches. Wind patterns show prevailing westerly winds with average speeds of 12.2 knots and extreme gusts up to 63.9 knots. Cloud cover is consistently high, averaging 81.9% annually, with median cloud cover often at 100%. This detailed environmental information is crucial for understanding the operational conditions for the proposed evaporator unit at Misawa Air Base.
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Text version
Evaporator Unit for 35 CES, Misawa AB, Japan RFQ No. FA520525QB064
Pond Condition Existing Operational Climatic Data Summary (OCDS) Type of Facility and Address Water Conservation Pond Number of Ponds 1 LOCATION_ID: ICAO_RJSM Closest City and State Misawa City / Aomori Prefecture ELEVATION: 119 ft / 36.27 m Pond Dimensions MEAN POR: User Defined Length (meters) 21 DETAILED POR: 1948-2023 Width (meters) 23.91 YEAR(S): 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 Depth (meters) 2 STATION NAME: MISAWA AB JAPAN Is the pond Lined? Yes PREPARED BY: 557 WW / 14 WS Is Overspray a Concern? Yes LOCATION(DEGREES): N 40.703 E 141.368 Water Chemistry UTC TO LST: 9 Turbidity 5 - 15 NTU TSS 5 mg/L - 20 mg/L Water Ph 7.4 Water Source Stormwater Water Temperature (Celsius) 10 ---- 25
Authoritative climate summary - data quality and quantity sufficient to produce accurate climatological values
Temperature Parameter Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Average Max (F) 34 36 47 57 67 69 76 79 74 64 53 39 58 Daily Average (F) 29 30 39 48 57 62 69 72 67 56 45 32 50 Standard Deviation (F) 5 6 7 9 8 6 6 6 6 7 9 7 17 Average Min (F) 25 26 33 41 50 57 66 68 61 49 39 29 45 Average # Days >= 90 F 0 0 0 0 # 0 2 3 # 0 0 0 5 Average # Days <= 32 F 30 26 19 4 0 0 0 0 0 # 6 26 110
Precipitation Parameter Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Monthly Max (In) 38.1 4 3.4 5.4 5.9 5.6 15.1 15.4 6.7 9.6 6.2 6.1 65.4 Monthly Average (In) 4.7 1.6 2.4 2.6 2.6 3.3 5.5 8.1 3.8 4.4 2.1 2 40.5 Monthly Min (In) 0.2 0.4 1.4 0 1 1.3 2.3 3.9 1.4 1.1 0.8 0.4 31.8 Daily Max (In) 15 1.2 1.6 2.5 3.1 1.9 7.5 5.7 2.5 3.1 2 2 15 Monthly Max Snowfall (In) 63 56.3 49.3 4.6 0 0 0 0 0 0 18.5 50.4 176.3 Monthly Average Snowfall (In) 28.4 30.6 14 0.9 0 0 0 0 0 0 4.3 24.6 97.8 Daily Max Snowfall (In) 16.1 15.8 12.6 3.1 0 0 0 0 0 0 13.4 11.8 16.1
Moisture Parameter Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Average Max RH (%) 87.2 86.8 84.4 83.4 88 95.7 96.5 95.3 93.3 89.9 89.3 90.6 90 Average Min RH (%) 50.6 48.5 41.8 35.6 43.8 61.5 69.1 65.7 57.6 48.9 49.7 53.3 52.2 Average Dew Point (F) 21 22 28 34 46 56 65 67 60 46 36 25 42 Std Dev Dew Point (F) 6 6 7 9 8 5 5 5 7 8 8 7 18 Average Vapor Pressure (In Hg) 0.11 0.12 0.16 0.2 0.32 0.47 0.63 0.68 0.54 0.33 0.22 0.14 0.33 Average Max Abs Humidity (g/m) 7.7 8.1 10.6 15.4 15.3 24.3 30.2 28.3 28.6 19.3 13.6 10.7 30.2 Average Min Abs Humidity (g/m) 1.1 1 1.4 1.3 2 4.7 8 7.3 5.6 2.8 1.9 1.3 1 Average Max Spec Humidity (g/m) 6.2 6.8 8.8 13.1 13.1 21.1 26.8 25.2 25.2 16.6 11.4 8.9 26.8 Average Min Spec Humidity (g/m) 0.8 0.8 1.1 1.1 1.6 4.1 6.6 6.2 4.7 2.2 1.5 1 0.8
Wind Parameter Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Prevailing Direction W W *** *** *** *** *** *** *** *** W W *** Average Prevailing Speed (kts) 15.5 15.3 15.7 14.6 6.4 7.2 10.3 9.5 12 12.8 13.4 14 12.2 Extreme Max Speed (kts) 40 40 36.9 39 33 33 26 42 33 36.9 36.9 36.9 42 Extreme Max Gust (kts) 55.9 52.1 56.9 55 52.1 42.9 42.9 63.9 49 51.1 49.9 49 63.9 Average Speed (kts) 10.5 10.6 10.1 10.1 8.1 7.1 6.3 7.6 7.3 8 8.9 10 8.8 Average Direction 276 285 279 278 274 321 335 355 336 88 89 277 89 Speed 50th Percentile (%) 5 5 4.7 4.7 3.6 3.3 3 3.7 3.3 3.4 4 4.7 4 Speed 80th Percentile (%) 8 8.3 7.9 8 6.5 5.5 4.8 6 5.7 6.4 6.9 7.7 7.1 Average Days > 25 kts 14.1 14.1 16.2 17 11.4 6.5 3.1 5.7 6.6 10.1 12.5 14 131.3 Average Days > 19 kts 17.2 16.3 18 18.3 12.7 7.5 3.9 6.9 7.9 11.8 14.9 16 151.4
Attachment 1 - Local Weather Data
Evaporator Unit for 35 CES, Misawa AB, Japan RFQ No. FA520525QB064
Pressure Parameter Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Extreme Max Pressure Altitude (ft) 928 1155 1155 846 735 873 735 1211 1099 958 735 958 1211 Average Max Pressure Altitude (ft) 216 178 200 231 284 322 286 299 189 138 128 194 222 Average Pressure Altitude (ft) 148 110 125 156 225 272 245 255 136 67 52 123 160 Std Dev Pressure Altitude (ft) 23.8 24.8 24.7 24 19.3 17.2 14.7 14.3 16.9 23.4 23 25.5 24 Average SLP (In Hg) 29.9 29.94 29.92 29.89 29.81 29.76 29.78 29.77 29.9 29.98 30 29.92 29.88 Std Dev SLP (In Hg) 0.21 0.22 0.22 0.22 0.17 0.16 0.13 0.13 0.15 0.21 0.21 0.23 0.22 Average Station Pressure (In Hg) 29.76 29.8 29.79 29.75 29.68 29.63 29.66 29.65 29.77 29.85 29.87 29.79 29.75 Std Dev Station Pressure (In Hg) 0.21 0.22 0.22 0.22 0.17 0.16 0.13 0.13 0.15 0.21 0.21 0.23 0.22 Extreme Max ALSTG (In Hg) 30.39 30.5 30.62 30.56 30.36 30.15 30.15 30.12 30.36 30.45 30.53 30.47 30.62 Average ALSTG (In Hg) 29.89 29.93 29.92 29.88 29.81 29.76 29.79 29.78 29.9 29.98 30 29.93 29.88
Cloud Parameter Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Average Cloud Cover (%) 85.7 85.3 75.9 72.7 75.8 85.2 87.8 87.1 80.7 73.9 78.1 86 81.9 Median Cloud Cover (%) 98.8 100 94 87.8 95.2 100 100 100 95.2 86.6 91.6 100 100
% Frequency of Wind > 25 kts Parameter Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
08-10 LST 6.8 8.7 13.1 16 9.8 3.6 1.5 3 3.5 8.4 7.8 6.9 7.3
11-13 LST 14.2 16.7 19.7 23.6 13.3 5.3 2.2 3.5 6.2 10.7 11.9 13.5 12
14-16 LST 10.6 13.2 13.8 18.1 10.9 5.2 1.5 2.8 4.6 8.3 8.3 9 8.9
17-19 LST 7.1 8.7 8.3 9.6 5.3 3.4 0.7 2.5 2.3 3.7 3.7 5.4 5.1
20-22 LST 5.9 7.3 4.5 4.5 2.7 0.9 0.5 1.8 2.1 2.6 4 5.7 3.7
23-01 LST 6.4 5.8 5.4 5.2 2.5 0.8 0.2 1.8 2 2.3 3.7 7.7 3.9
02-04 LST 5.4 5.8 5.7 4.7 2.1 0.8 0.1 1.5 2.1 3.6 6.4 7.2 3.9
05-07 LST 4.4 4.9 5.6 5.9 3.8 1.6 0.2 1.6 2.5 3.9 5.8 5.1 3.8
All Hours 7.8 9.2 10 11.5 6.3 2.8 0.9 2.3 3.2 5.6 6.6 7.8 6.2
LEGEND:
* = Data not Available *** = Variable Wind Direction Predominant # = Occurrences rounded to zero $ = Percent of Calm > Prevailing Direction Abs = Absolute ALSTG = Altimeter Setting DA = Density Altitude FG/BR = Fog/Mist LST = Local Standard Time RH = Relative Humidity SLP = Sea Level Pressure Spec = Specific Std Dev = Standard Deviation T = Trace Vis = Visibility
File details come from the government source that posted it. Updated .