KSEA - Seattle-Tacoma Intl, WA, US
| Potential Impact | None | Slight | Moderate | High |
| Time | 22/23Z | 23/00Z | 23/01Z | 23/02Z | 23/03Z | 23/04Z | 23/05Z | 23/06Z | 23/07Z | 23/08Z | 23/09Z | 23/10Z | 23/11Z |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp | 94 | 92 | 89 | 86 | 86 | 77 | 74 | 69 | 67 | 65 | 63 | 62 | 61 |
| Dewpt | 53 | 58 | 55 | 55 | 51 | 64 | 63 | 60 | 58 | 59 | 58 | 58 | 58 |
| Altim | 1011.3 | 1010.9 | 1011.3 | 1011.3 | 1011.6 | 1012.6 | 1014.6 | 1015.3 | 1015.7 | 1015.7 | 1015.7 | 1016.7 | 1016.3 |
| VIS | 10+ | 9 | 10+ | 10+ | 10+ | 9 | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ |
| CIG | 25000 | 23000 | 15000 | 14000 | 14000 | 13000 | 9000 | 12000 | 12000 | 11000 | -- | 1000 | 800 |
| Cover | BKN | BKN | BKN | BKN | BKN | BKN | BKN | BKN | BKN | BKN | SCT | BKN | BKN |
| FltCat | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | MVFR | IFR |
| WX | -- | -- | -- | -- | -- | -TSRA | -- | -- | -- | -- | -- | -- | -- |
| WDir | 360 | 300 | 320 | 330 | 360 | 120 | 190 | 170 | 210 | 210 | 200 | 160 | 190 |
| WSpd | 9 | 7 | 7 | 7 | 6 | 12 | 7 | 5 | 7 | 10 | 7 | 8 | 8 |
| WGst | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
METAR KSEA 222253Z 36009KT 10SM FEW050 FEW100 SCT160 BKN250 34/12 A2986 RMK A02 SLP115 T03440117
METAR KSEA 222353Z 30007KT 9SM FEW050 SCT100 BKN230 33/14 A2985 RMK A02 SLP111 T03330144 10350 20289 56014
METAR KSEA 230053Z 32007KT 10SM FEW050 BKN150 BKN230 32/13 A2986 RMK A02 SLP114 T03170128
METAR KSEA 230153Z 33007KT 10SM SCT110 BKN140 BKN220 30/13 A2986 RMK A02 SLP116 T03000128
METAR KSEA 230253Z 36006KT 10SM SCT100 BKN140 BKN220 30/11 A2987 RMK A02 SLP117 T03000106 51005
METAR KSEA 230353Z 12012KT 9SM -TSRA FEW045CB SCT090 BKN130 25/18 A2990 RMK A02 RAB32 TSB23 SLP129 OCNL LTGICCG OHD TS OHD MOV N CB SE MOV N P0005 T02500178
METAR KSEA 230453Z 19007KT 10SM FEW055 BKN090 BKN110 23/17 A2996 RMK A02 RAE37 TSE13 P0000 T02330172
METAR KSEA 230553Z 17005KT 10SM FEW055 BKN120 21/16 A2998 RMK A02 SLP155 60005 T02060156 10339 20206 51037 $
METAR KSEA 230653Z 21007KT 10SM BKN120 19/14 A2999 RMK A02 SLP159 T01940144 $
METAR KSEA 230753Z 21010KT 10SM BKN110 18/15 A2999 RMK A02 SLP159 P0000 T01830150 403500183 $
METAR KSEA 230853Z 20007KT 10SM FEW110 SCT250 17/14 A2999 RMK A02 SLP158 60000 T017201444 50003 $
METAR KSEA 230953Z 16008KT 10SM BKN010 17/14 A3002 RMK A02 SLP167 T01670144 $
METAR KSEA 231053Z 19008KT 10SM BKN008 16/14 A3001 RMK A02 SLP166 T01610144 $