KIAD - Washington/Dulles Intl, VA, US
| Potential Impact | None | Slight | Moderate | High |
| Time | 08/17Z | 08/18Z | 08/19Z | 08/20Z | 08/21Z | 08/22Z | 08/23Z | 09/00Z | 09/01Z | 09/02Z | 09/03Z | 09/04Z | 09/05Z |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp | 21 | 22 | 24 | 25 | 24 | 24 | 22 | 21 | 20 | 19 | 19 | 18 | 18 |
| Dewpt | 1 | 1 | 1 | 1 | 2 | -0 | -0 | -0 | -0 | -0 | -0 | -0 | -0 |
| Altim | 1027.2 | 1026.2 | 1025.8 | 1026.2 | 1026.5 | 1026.5 | 1027.2 | 1028.2 | 1028.5 | 1028.9 | 1029.2 | 1029.2 | 1028.9 |
| VIS | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ |
| CIG | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Cover | FEW | FEW | FEW | FEW | FEW | CLR | FEW | CLR | CLR | CLR | CLR | CLR | CLR |
| FltCat | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR |
| WX | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| WDir | 320 | 320 | 330 | 330 | 340 | 340 | 340 | 340 | 340 | 330 | 330 | 330 | 340 |
| WSpd | 13 | 16 | 14 | 15 | 16 | 14 | 12 | 7 | 7 | 6 | 8 | 8 | 9 |
| WGst | 26 | 25 | 25 | 26 | 23 | 25 | 20 | -- | -- | -- | -- | -- | -- |
METAR KIAD 081652Z 32013G26KT 10SM FEW040 FEW250 M06/M17 A3033 RMK AO2 PK WND 30026/1609 SLP274 T10611172 $=
METAR KIAD 081752Z 32016G25KT 10SM FEW040 FEW250 M06/M17 A3030 RMK AO2 PK WND 31027/1741 SLP266 4/002 T10561172 11050 21117 58014 $=
METAR KIAD 081852Z 33014G25KT 10SM FEW045 FEW250 M04/M17 A3029 RMK AO2 PK WND 32027/1802 SLP262 T10441172 $=
METAR KIAD 081952Z 33015G26KT 10SM FEW045 M04/M17 A3030 RMK AO2 PK WND 32028/1937 SLP264 T10391172 $=
METAR KIAD 082052Z 34016G23KT 10SM FEW045 M04/M17 A3031 RMK AO2 PK WND 31029/1956 SLP268 T10441167 53001 $=
METAR KIAD 082152Z 34014G25KT 10SM CLR M04/M18 A3031 RMK AO2 PK WND 33027/2107 SLP270 T10441178 $=
METAR KIAD 082252Z 34012G20KT 10SM FEW050 M06/M18 A3033 RMK AO2 SLP277 T10561178 $=
METAR KIAD 082352Z 34007KT 10SM CLR M06/M18 A3036 RMK AO2 SLP286 T10611178 11039 21061 53018 $=
METAR KIAD 090052Z 34007KT 10SM CLR M07/M18 A3037 RMK AO2 SLP288 T10671178 $=
METAR KIAD 090152Z 33006KT 10SM CLR M07/M18 A3038 RMK AO2 SLP294 T10721178 $=
METAR KIAD 090252Z 33008KT 10SM CLR M07/M18 A3039 RMK AO2 SLP294 T10721178 51008 $=
METAR KIAD 090352Z 33008KT 10SM CLR M08/M18 A3039 RMK AO2 SLP295 T10781178 $=
METAR KIAD 090452Z 34009KT 10SM CLR M08/M18 A3038 RMK AO2 SLP291 T10781178 410391117 $=