Weather Bureau topics and personnel / United States Department of ...

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Forecasts of wind direction nnd force are includrd in both morning
and evening predictions for 8tatc.s bordcrinp; on the Pacific and Gulf
coasts. They npply to the constal srctions nnd contiguous off-shore water
a r ~ nnd , ~ not to the interior of such Statcs.
Separate wind and wonthcr forecasts arc issued for constal nnd contiguous
ocean nrens of the States in tlw Wnshington forecnst district which
border thc Atlnntic Occvm or the Gulf of Moxico, and from the Chicngo
forecad ccntcr for thc States 011 tlic Grent Lnlrrs. Howover, whcncvcr
Unurj~dl~ strong winds arc! expected, wind predictions are included in
the fOr(Y‘&H for 1111 thc Stat(% in thc country, nnd when includcd they
apply to tlw who10 State area.
I)istribution of wratIier forecnsts is rxtcnsivo. Many methods are employ~~~,
but tllose mninly t1cpcm1cc1 on m’r nrwspapera, rdio, tcilcgruph,
telcpliono, the niails. Necexsttrily, tho forecast8 nlUHt br brief and,
throforp, cprtnin wor(18 wliicli liiavcl ti dcfinite nirnning nro ~ixcc~ with
I1
rcg\llarity. Some of thcm, such nn “wnrincr”, colder”, “local thundcr-
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stormyy, fog”, cold WILVO”, light frost”, nnd ‘(Ii~~nvy frost” are well
undPrRtood, but others arcsubjwt to intcrpretntion. Tcrmsof tlw latter
cl@~ arc 1istc.d below, tog&cr with the intorprctntions plnccd upon thcm,
Clear.-No prccipitation. Sky frrc or ncnrly free from clouds.
Fnir.-No prmipiiatioii, but, thr character of the sky imy rmigc from
clear to pnrtly cloudy.
Qenerally fair.-Somc vsrint,ion in cloudiness nnd possibly soin(! light
precipitnt ion in scattered ~JRCPR, but clear to pnrtly cloudy &y over most
of tho area. This tprm iR usudly employcd in forecmte for relativrly
large arms, Hun11 rn tL wliolo State or ~ialf of a Stnto.
Partly cloudy. - No precipitation, but ROI~IP cloudiness.
increasing cloudiness.-Sky clear or pnrtly cloudy atl the beginning
of thc period, b(aoming overcmt by ita close; or, whcn the sky i5 nearly
Overenst with thin, high cloud8 at, tho beginning of tho period and iiitrr-
bcdinte or low elouds dovclog bcforc itH closc.
mostly cloudy.-Slcy ovrrcnst, but occasional brcnh of considornblr
Cloudy.-No precipitation, but overcfwt Nky.
Unsettled.--Connidrr~ble cloudincvs and thrc\ntening wcatlier, with
little (less than .02 inch) or no pracipitntion.
Threatening.--Sky overcast with dark, lowcring clouds, but prccipi-
liain.-I’rcciDitntion of compnrativcly long duration, tis distinguished
ronl sIiow(irs, sucll ns frequently occur in the suiiiiner.
Occasional rain.-Rainfdl at infrrqumt iiitcrvnls and not prolonged.
Showers.-Intcriiiittont rninfnll of compnrntively short duration.
Snow.-Snowfall of relatively long duration.
Occasional snow,-SnowfnII at infroqucnt intervnls and not prolonged.
Snow f1urries,-Vpr,y light and jntrririittrnt snowfall.