KSEA - Seattle-Tacoma Intl, WA, US
| Potential Impact | None | Slight | Moderate | High |
| Time | 20/17Z | 20/18Z | 20/19Z | 20/20Z | 20/21Z | 20/22Z | 20/23Z | 21/00Z | 21/01Z | 21/02Z | 21/03Z | 21/04Z | 21/05Z |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp | 58 | 62 | 63 | 65 | 67 | 68 | 70 | 69 | 68 | 65 | 63 | 61 | 60 |
| Dewpt | 52 | 53 | 53 | 53 | 54 | 54 | 54 | 54 | 54 | 53 | 52 | 51 | 51 |
| Altim | 1019.7 | 1019.7 | 1019.4 | 1019 | 1018.7 | 1018 | 1017.4 | 1016.7 | 1016.3 | 1016 | 1016 | 1016 | 1016.3 |
| VIS | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ |
| CIG | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Cover | SCT | SCT | FEW | CLR | CLR | CLR | FEW | FEW | FEW | FEW | FEW | CLR | CLR |
| FltCat | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR |
| WX | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| WDir | 20 | VRB | 40 | 300 | VRB | 270 | 300 | 290 | 290 | 300 | 340 | 350 | 360 |
| WSpd | 8 | 5 | 4 | 6 | 6 | 6 | 6 | 7 | 5 | 4 | 4 | 4 | 5 |
| WGst | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
METAR KSEA 201653Z 02008KT 10SM FEW007 SCT020 14/11 A3011 RMK AO2 SLP202 T01440111 $
METAR KSEA 201753Z VRB05KT 10SM FEW010 SCT020 17/12 A3011 RMK AO2 SLP200 T01670117 10167 20100 58002 $
METAR KSEA 201853Z 04004KT 10SM FEW010 FEW020 17/12 A3010 RMK AO2 SLP197 T01720117 $
METAR KSEA 201953Z 30006KT 10SM CLR 18/12 A3009 RMK AO2 SLP195 T01830117 $
METAR KSEA 202053Z VRB06KT 10SM CLR 19/12 A3008 RMK AO2 SLP191 T01940122 58009 $
METAR KSEA 202153Z 27006KT 10SM CLR 20/12 A3006 RMK AO2 SLP184 T02000122 $
METAR KSEA 202253Z 30006KT 10SM FEW200 21/12 A3004 RMK AO2 SLP176 T02110122 $
METAR KSEA 202353Z 29007KT 10SM FEW200 21/12 A3002 RMK AO2 SLP170 T02060122 10211 20161 56020 $
METAR KSEA 210053Z 29005KT 10SM FEW200 20/12 A3001 RMK AO2 SLP167 T02000122 $
METAR KSEA 210153Z 30004KT 10SM FEW200 18/12 A3000 RMK AO2 SLP163 T01830117 $
METAR KSEA 210253Z 34004KT 10SM FEW200 17/11 A3000 RMK AO2 SLP163 T01720111 56007 $
METAR KSEA 210353Z 35004KT 10SM CLR 16/11 A3000 RMK AO2 SLP165 T01610106 $
METAR KSEA 210453Z 36005KT 10SM CLR 16/11 A3001 RMK AO2 SLP167 T01560106 $