Page:CAB Accident Report, Northwest Airlines Flight 2.pdf/15

- 2 - north-northeast 21 at 6:18 p.m., but a regular observation at 6:30 p.m. recorded northeast 27. Rain showers were in progress at Bismarck from 4:13 p.m. to 6:41 p.m. and were reported as heavy at 6:01 p.m. Moderate thunderstorm prevailed from 5:39 p.m. to 6:30 p.m.

Hourly weather surface reports:

Special — 5:39 p.m., contact, ceiling estimated 3500, overcast, visibility 7 miles, moderate thunderstorm, light rain showers, wind north-northwest, thunder southeast.

Special — 6:01 p.m., closed, ceiling estimated 2500, overcast, visibility 3/4 mile, moderate thunderstorm, heavy rain showers, Wind north-northwest 13, thunder overhead.

Special — 6:10 p.m., instrument, ceiling estimated 2500, overcast, visibility 1½ mile, moderate thunderstorm, moderate rain showers, wind north-northeast 10, thunderstorm moving northwest.

Record — 6:30 p.m., instrument, ceiling estimated 3000, overcast, lower broken, visibility 2 miles, moderate thunderstorm, moderate rain showers, wind northeast 27, thunderstorm moving north, visibility 3 west.

Special — 6:41 p.m., contact, ceiling estimated 3000, overcast, lower broken, visibility 4 miles, light rain showers, wind north-northeast 32, strong gusts, thunderstorm moving north, visibility 2 east.