Forecast for station KIAD, forecast created on 290520Z, covering the period from 05/29 06:00Z to 05/30 12:00Z... Forecast calls for wind from heading 200° at 5 knots. Visibility unlimited. Clear... From 05/29 09:00Z expect mist. Variable winds at 3 knots. Visibility 5 miles. Few clouds at 25000 feet... From 05/29 12:00Z expect wind from heading 200° at 7 knots. Visibility unlimited. Scattered clouds at 3000 feet... From 05/29 17:00Z expect wind from heading 210° at 6 knots. Visibility unlimited. Broken clouds at 5000 feet... From 05/29 20:00Z expect vicinity thunderstorms. Wind from heading 220° at 12 knots. Visibility unlimited. Broken cumulonimbus clouds at 4000 feet... From 05/30 01:00Z expect vicinity thunderstorms. Wind from heading 250° at 8 knots. Visibility unlimited. Broken cumulonimbus clouds at 5000 feet... From 05/30 04:00Z expect wind from heading 290° at 4 knots. Visibility unlimited. Broken clouds at 6000 feet. Overcast clouds at 12000 feet...