KIAD - Washington/Dulles Intl, VA, US
| Potential Impact | None | Slight | Moderate | High |
| Time | 13/10Z | 13/11Z | 13/12Z | 13/13Z | 13/14Z | 13/15Z | 13/16Z | 13/17Z | 13/18Z | 13/19Z | 13/20Z | 13/21Z | 13/22Z |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp | 75 | 70 | 77 | 79 | 81 | 83 | 84 | 85 | 87 | 88 | 88 | 87 | 88 |
| Dewpt | 65 | 65 | 65 | 65 | 65 | 65 | 66 | 67 | 67 | 67 | 66 | 69 | 68 |
| Altim | 1012.3 | 1012.6 | 1013.3 | 1013.6 | 1014 | 1014.3 | 1014.3 | 1014 | 1014 | 1013.6 | 1013.3 | 1013.3 | 1013.3 |
| VIS | 10+ | 10+ | 10+ | 10+ | 10+ | 7 | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ | 10+ |
| CIG | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 25000 | 7000 | 25000 |
| Cover | FEW | FEW | CLR | FEW | FEW | FEW | FEW | FEW | FEW | SCT | BKN | BKN | BKN |
| FltCat | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR | VFR |
| WX | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| WDir | 320 | 0 | 0 | 340 | 320 | 330 | 330 | 0 | 280 | VRB | VRB | 210 | 190 |
| WSpd | 3 | 0 | 0 | 8 | 9 | 10 | 7 | 0 | 9 | 5 | 4 | 6 | 4 |
| WGst | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
METAR KIAD 130952Z 32003KT 10SM FEW120 24/18 A2989 RMK AO2 SLP117 T02390183 $
METAR KIAD 131052Z 00000KT 10SM FEW120 21/18 A2990 RMK AO2 SLP121 T02110183 $
METAR KIAD 131152Z 00000KT 10SM CLR 25/18 A2992 RMK AO2 SLP128 T02500183 10250 20206 53014 $
METAR KIAD 131252Z 34008KT 10SM FEW250 26/18 A2993 RMK AO2 SLP132 T02610183
METAR KIAD 131352Z 32009KT 10SM FEW030 FEW250 27/18 A2994 RMK AO2 SLP134 T02720183
METAR KIAD 131452Z 33010KT 7SM FEW030 FEW250 28/18 A2995 RMK AO2 SLP137 T02830183 51010
METAR KIAD 131552Z 33007KT 10SM FEW030 FEW250 29/19 A2995 RMK AO2 SLP138 T02890189
METAR KIAD 131652Z 00000KT 10SM FEW030 FEW250 29/19 A2994 RMK AO2 SLP135 T02940194
METAR KIAD 131752Z 28009KT 10SM FEW045 FEW250 31/19 A2994 RMK AO2 SLP133 T03060194 10306 20250 58004
METAR KIAD 131852Z VRB05KT 10SM FEW050 SCT250 31/19 A2993 RMK AO2 SLP130 T03110194
METAR KIAD 131952Z VRB04KT 10SM SCT055 SCT190 BKN250 31/19 A2992 RMK AO2 SLP128 T03110189
METAR KIAD 132052Z 21006KT 10SM SCT055 BKN070 BKN180 BKN250 31/21 A2992 RMK AO2 SLP128 T03060206 55005
METAR KIAD 132152Z 19004KT 10SM FEW070 SCT085 BKN250 31/20 A2992 RMK AO2 SLP126 T03110200