Evening star. [volume] (Washington, D.C.) 1854-1972, 1930-10-26

of Uncle Sam have been content to
conf,ne their endeavors to general broadcasts
as to this or that particular area. CLOUDY
with possible showers this afternoon" or FAIR,
with slight change in temperature today ana
tomorrow" are familiar examples of yesterdays
type of forecast.
But aviation demands great deal more than
this 1t insists upon a far more intimate and
immediate knowledge of the weather, atmos-
pheric conditions at the field from whlcn par
ticular plane is scheduled to fly, besides pre-
else idea of conditions all along the flying
. route.
Fortunately for the airmen, experts OF the
D. s. Weather Bureau, notably at the central
once at Washington, are fully aware OF the
increasing stress on the time element in fore
casting. They know that flyers are far more
interested in knowing what the weather will
be like one-half hour to an hour ahead of his
flying time than whether tomorrow viii bring
thunderstorms and rain.
Thus it has come about that today seven
forecasting centers, three of them recently
established, are served by ITO reporting sta
TONS They in turn serve 1000 miles of
airways up and down across the United States
These forecasting centers are located at Cleve-
land, Ohio; Fort Crook, Nebr.; Salt Lake City,
Utah; Oakland, Calf; Atlanta, Ga; Dallas,
Tex; Portland, Ore. The last three named
are new.
BULLETINS and short-period forecasts based
on the reports coming in from the ITO re-
porting stations are sent by teletype from the
seven central broadcaSting stations to other
Airports and landing fields and also to aircraft
In flight through radio stations maintained by
the Department Of Commerce.
approximately 5000 miles of the $4,000 miles
of airways criss-crossing the country are
served by teletype broadcasts with reports every
hour of a 24-hour service. The remaining
5000 miles, Whereabouts. are served by re-
ports transmitted by telephone or telegraph at
such intervals as best meet current needs. In
addition, current reports along all these air
ways are supplemented by specialized, short
period airway forecasts which are based pri-
marily on the twice daily countrywide reports
and weather maps, used in general forecasting.
and, secondarily a series of three-hourly
reports concentrated at designated centers from
q well selected network of stations. Some of
these reporting centers are on the airways and
others are at a considerable distance from them
Continuous weather advice for pilots Of
aircraft Is the objective of the aeronautical
meteorological service of the Weather Bureau"
says c. F. Marvin, chief of the bureau.
"A great many Cities he points out. have
already set about developing local airports
either privately owned and operated or under
municipal control. New cities are being added
to the list almost daily. These localities need
and expect adequate weather service, and it is
the policy of the bureau to supply it as far as
possible.
Since 1926 funds have been included in the
regular appropriations Of the Department Of
Agriculture for assigning and maintaining on
duty at every important airport one or more
skilled meteorologists, whose duties require
them to receive from the central organization
of the Weather Bureau the fullest possible
advices, reports, observations, ETC., including
forecasts and warnings and to pass these on
to the pilots Of airplanes at the time of and
in accordance with the flight Immediately in
contemplation.
1.-The basis of these advices and warnings to
pilots is necessarily derived from the great
network of meteorological stations that has
been built up by the Weather Bureau through
out past years."
FURTHER, as a result of aviation's demands
= with regard 10 weather conditions DR..
Marvin states that there Is q growing demand
1Or. four daily observations from meteorological