KIAD - Washington/Dulles Intl, VA, US
| Potential Impact | None | Slight | Moderate | High |
| Time | 07/01Z | 07/02Z | 07/03Z | 07/04Z | 07/05Z | 07/06Z | 07/07Z | 07/08Z | 07/09Z | 07/10Z | 07/11Z | 07/12Z | 07/13Z |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp | 31 | 30 | 29 | 31 | 30 | 29 | 28 | 25 | 26 | 26 | 26 | 26 | |
| Dewpt | 30 | 30 | 29 | 30 | 29 | 28 | 27 | 25 | 25 | 25 | 25 | 25 | |
| Altim | 1015.7 | 1016 | 1016.7 | 1017 | 1018 | 1018.4 | 1017.7 | 1018.7 | 1019 | 1020.1 | 1020.4 | 1020.4 | |
| VIS | 8 | 7 | 8 | 5 | 5 | 6 | 4 | 3 | 5 | 1.5 | 0.5 | 4 | |
| CIG | -- | 6000 | 5500 | 5500 | -- | -- | 19000 | 19000 | 20000 | 100 | 200 | 22000 | |
| Cover | SCT | BKN | BKN | BKN | FEW | SCT | BKN | BKN | OVC | BKN | BKN | BKN | |
| FltCat | VFR | VFR | VFR | MVFR | MVFR | VFR | MVFR | MVFR | MVFR | LIFR | LIFR | MVFR | |
| WX | -- | -- | -- | BR | BR | BR | BR | BR | BR | BR | FZFG | BR | |
| WDir | 210 | 0 | 190 | 0 | 0 | 280 | 130 | 210 | 0 | 0 | 0 | 210 | |
| WSpd | 4 | 0 | 3 | 0 | 0 | 4 | 3 | 3 | 0 | 0 | 0 | 3 | |
| WGst | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
METAR KIAD 070052Z 21004KT 8SM SCT055 SCT250 M01/M01 A2999 RMK AO2 SLP160 T10061011
METAR KIAD 070152Z 00000KT 7SM BKN060 M01/M01 A3000 RMK AO2 SLP162 I1000 T10111011
METAR KIAD 070252Z 19003KT 8SM BKN055 M02/M02 A3002 RMK AO2 SLP169 I1000 I3000 T10171017 53013 $
METAR KIAD 070352Z 00000KT 5SM BR BKN055 M01/M01 A3003 RMK AO2 SLP173 T10061011 $
METAR KIAD 070452Z 00000KT 5SM BR FEW055 M01/M02 A3006 RMK AO2 SLP180 I1000 T10111017 400561028 $
METAR KIAD 070552Z 28004KT 6SM BR FEW055 SCT190 M02/M02 A3007 RMK AO2 SLP184 I1000 I6000 T10171022 10000 21028 51015 $
METAR KIAD 070652Z 13003KT 4SM BR BKN190 M02/M03 A3005 RMK AO2 SLP178 I1000 T10221028 $
METAR KIAD 070752Z 21003KT 3SM R01R/1800VP6000FT BR BKN190 M04/M04 A3008 RMK AO2 SLP187 I1000 T10391039 $
METAR KIAD 070852Z 00000KT 5SM BR OVC200 M03/M04 A3009 RMK AO2 SLP190 I3000 T10331039 53006 $
METAR KIAD 071052Z 00000KT 1 1/2SM BR BKN001 M03/M04 A3012 RMK AO2 SLP202 I1000 T10331039 $
METAR KIAD 071152Z 00000KT 1/2SM R01R/P6000FT FZFG BKN002 BKN007 BKN012 M03/M04 A3013 RMK AO2 SLP204 TWR VIS 10 I6000 T10331039 11017 21044 51014 $
METAR KIAD 071252Z 21003KT 4SM BR FEW036 SCT150 BKN220 M03/M04 A3013 RMK AO2 SLP205 T10331039 $