Heating and Wind Design Conditions for Washington
City | Lat. | Long. | Elev. | Std. Pres. | Heating Dry Bulb, °F | Extreme Wind Speed, mph | Coldest Month WS / MCDB | MCWS / MCWD to DB | Annual Extreme Daily | ||||||||||||
0.4% | 1% | 99.6% | 0.4% | Mean DB | Std. DB | ||||||||||||||||
°N | °W | Feet | psia | 99.6% | 99% | 1% | 2.5% | 5% | WS | MCDB | WS | MCDB | MCWS | PWD | MCWS | PWD | Max | Min | Max | Min | |
Bellingham | 48.80 | 122.53 | 157 | 14.612 | 15 | 21 | 23 | 20 | 18 | 28 | 33 | 23 | 34 | 17 | 40 | 9 | 290 | 87 | 11 | 3.1 | 7.4 |
Hanford | 46.57 | 119.60 | 732 | 14.311 | 5 | 12 | 25 | 21 | 18 | 24 | 44 | 19 | 44 | 6 | 20 | 8 | 20 | 105 | 2 | 3.1 | 9.0 |
Olympia | 46.97 | 122.90 | 200 | 14.589 | 18 | 23 | 21 | 18 | 16 | 21 | 45 | 19 | 45 | 5 | 180 | 8 | 50 | 94 | 10 | 4.0 | 8.1 |
Quillayute | 47.95 | 124.55 | 203 | 14.588 | 23 | 27 | 33 | 27 | 21 | 41 | 45 | 35 | 45 | 7 | 60 | 9 | 240 | 87 | 19 | 8.4 | 6.4 |
Seattle, Int’l Airport | 47.45 | 122.30 | 449 | 14.458 | 23 | 28 | 22 | 19 | 17 | 24 | 44 | 21 | 44 | 10 | 10 | 10 | 350 | 92 | 19 | 3.6 | 6.8 |
Spokane, Fairchild AFB | 47.62 | 117.65 | 2461 | 13.435 | 1 | 7 | 27 | 23 | 20 | 28 | 39 | 25 | 38 | 7 | 50 | 9 | 240 | 98 | -7 | 3.2 | 8.7 |
Stampede Pass | 47.28 | 121.33 | 3967 | 12.708 | 3 | 10 | 21 | 19 | 16 | 27 | 19 | 22 | 25 | 13 | 90 | 7 | 100 | 84 | 2 | 3.2 | 7.2 |
Tacoma, McChord AFB | 47.13 | 122.48 | 322 | 14.525 | 18 | 24 | 18 | 15 | 13 | 22 | 45 | 18 | 46 | 2 | 180 | 7 | 20 | 94 | 12 | 2.7 | 6.8 |
Walla Walla | 46.10 | 118.28 | 1204 | 14.067 | 4 | 12 | 22 | 19 | 17 | 24 | 49 | 22 | 47 | 6 | 180 | 9 | 300 | 105 | 1 | 3.2 | 11.7 |
Wenatchee | 47.40 | 120.20 | 1243 | 14.047 | 3 | 9 | 22 | 19 | 17 | 17 | 36 | 12 | 31 | 3 | 100 | 9 | 280 | 101 | -2 | 2.5 | 7.2 |
Yakima | 46.57 | 120.53 | 1066 | 14.138 | 4 | 11 | 24 | 20 | 17 | 23 | 47 | 19 | 43 | 7 | 250 | 7 | 90 | 101 | -2 | 3.2 | 8.5 |