Page:CAB Accident Report, American Airlines Flight 1.pdf/25

 APPENDIX B

WEATHER BUREAU AIRPORT STATION, CLEVELAND, OHIO

AIRWAY FORECAST FOR THE PERIOD 5 30 P M OCTOBER 30, 1941

TO 1 30 A M, EST, OCTOBER 31, 1941

"A flat low-pressure trough lies over the Great Lakes Region at 1 30 p m EST An active low-pressure area cantered over southern Texas at 1 30 p m EST will move northeastward into northern Texas or southern Arkansas by 1 30 a m EST and gradient will increase as far north as the southern Great Lakes Region with the advance of the low Overcast with light rain or drizzle and fog over Michigan, northern Indiana and vicinity of Lake Erie Ceiling generally 8 to 15 hundred over northern Indiana and Michigan but 4 to 8 hundred in places and lowering generally to 4 to 8 hundred after 8 00 p m EST Visibility 1/2 to 2 miles but ceiling and visibility ZERO in patches by midnight Ceiling 2 to 5 thousand over the Lake Erie Section with visibility 1 to 3 miles but ceiling lowering to 8 to 15 hundred along the north and northwest shores after 8 00 p m EST occasionally 4 to 8 hundred by midnight with visibility occasionally 1/2 mile or less Mostly overcast at 3 to 6 thousand or higher over Ohio and eastward to the Coast with visibility 2 to 5 miles with haze and smoke occasionally 1 mile or less near industrial centers Overcast with light rain over central and southern Indiana and Cincinnati--Nashville Airway Ceiling 1 to 2 thousand and visibility 1 to 3 miles with fog lowering 3 to 6 hundred and visibility occasionally 1/2 mile soon after 7 00 p m EST The rain and fog area with ceiling 4 to 8 hundred and visibility 1/2 to 2 miles will spread northeastward through Indiana, Ohio and southwestern Pennsylvania by 1 30 a in EST with ceiling and visibility lowering to ZERO over the mountains, western Maryland, and southwestern Pennsylvania after midnight Occasional moderate to heavy rain with near ZERO conditions Louisville--Nashville section after 8 00 p m EST Icing conditions above 5 or 6 thousand over Michigan and extreme northern Indiana

"Terminal Forecasts

"Buffalo Overcast with occasional drizzle or light rain and increasing fog, ceiling 2 to 4 thousand feet and visibility 1 to 2 miles lowering to 1 to 2 thousand feet and visibility 1 mile or less after 9 00 p m EST

"Detroit Overcast with intermittent drizzle or light rain and fog, ceiling 2 to 4 thousand feet and visibility 2 to 4 miles, lowering to 8 to 15 hundred feet and visibility 1 mile or less by 8 00 p m EST and ceiling lowering to 4 to 8 hundred feet after 10 00 p m EST, icing conditions above 6 thousand feet"