KIAD - Washington/Dulles Intl, VA, US
| Potential Impact | None | Slight | Moderate | High |
| Time | 10/11Z | 10/12Z | 10/13Z | 10/14Z | 10/15Z | 10/16Z | 10/17Z | 10/18Z | 10/19Z | 10/20Z | 10/21Z | 10/22Z | 10/23Z |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp | 43 | 46 | 49 | 53 | 59 | 62 | 67 | 71 | 76 | 77 | 77 | 77 | 75 |
| Dewpt | 41 | 43 | 43 | 44 | 42 | 42 | 42 | 43 | 43 | 45 | 42 | 41 | 41 |
| Altim | 1028.5 | 1028.9 | 1028.2 | 1027.9 | 1027.5 | 1026.8 | 1025.5 | 1024.1 | 1022.4 | 1021.1 | 1020.4 | 1020.1 | 1020.1 |
| VIS | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ |
| CIG | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Cover | FEW | FEW | FEW | FEW | CLR | FEW | FEW | FEW | FEW | FEW | FEW | FEW | SCT |
| FltCat | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR |
| WX | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| WDir | 170 | 150 | 200 | VRB | 200 | 170 | VRB | 200 | 190 | 170 | 160 | 150 | 150 |
| WSpd | 4 | 3 | 6 | 5 | 7 | 7 | 5 | 8 | 9 | 9 | 12 | 10 | 9 |
| WGst | -- | -- | -- | -- | -- | -- | -- | 16 | -- | -- | 18 | 20 | -- |
METAR KIAD 101052Z 17004KT 10SM FEW250 06/05 A3037 RMK AO2 SLP285 T00610050 $
METAR KIAD 101152Z 15003KT 10SM FEW250 08/06 A3038 RMK AO2 SLP287 T00780061 10078 20056 53005 $
METAR KIAD 101252Z 20006KT 10SM FEW250 09/06 A3036 RMK AO2 SLP282 T00940061
METAR KIAD 101352Z VRB05KT 10SM FEW250 12/07 A3035 RMK AO2 SLP279 T01170067
METAR KIAD 101452Z 20007KT 10SM CLR 15/06 A3034 RMK AO2 SLP272 T01500056 56014
METAR KIAD 101552Z 17007KT 130V190 10SM FEW250 17/06 A3032 RMK AO2 SLP265 T01670056
METAR KIAD 101652Z VRB05KT 10SM FEW250 19/06 A3028 RMK AO2 SLP253 T01940056
METAR KIAD 101752Z 20008G16KT 10SM FEW250 22/06 A3024 RMK AO2 SLP238 T02170061 10217 20078 58034
METAR KIAD 101852Z 19009KT 10SM FEW250 24/06 A3019 RMK AO2 SLP222 T02440061
METAR KIAD 101952Z 17009KT 10SM FEW250 25/07 A3015 RMK AO2 SLP210 T02500072
METAR KIAD 102052Z 16012G18KT 10SM FEW250 25/06 A3013 RMK AO2 SLP203 T02500056 56035
METAR KIAD 102152Z 15010G20KT 10SM FEW250 25/05 A3012 RMK AO2 SLP199 T02500050
METAR KIAD 102252Z 15009KT 10SM FEW050 SCT250 24/05 A3012 RMK AO2 SLP198 T02390050