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<br />~he implementation of the experiment required the daily <br /> <br />issuance, except for "selected" days-off, of two 12-hour <br /> <br />fo~ecastsi one by the morning forecaster at 9:00 a.ID. and one by <br /> <br />the evening forecaster at 9:00 p.m. A revised forecast form was <br /> <br />utilized for this task, Fig. 2. The initial step in the <br /> <br />forecast was to doc~ment the current synoptic/mesoscale situation <br /> <br />and the current SLW concentration from either the ~JG radiometer <br /> <br />or a Rosemont icing rate meter (probe) situated atop S~uaw Peak <br /> <br />(2,500 m) (see Henderson and Solak, 1983). The radiometer data <br /> <br />were available on a real-time printer in the SCPP forecast <br /> <br />office, and the icing rate and precipitation rate data were <br /> <br />available by interrogating the Bureau's remote data inges~. <br /> <br />computer in Denver. Precipitation data from a digital~~d <br /> <br />located at KGV, along with the KGV SLW information also were <br /> <br />available within the SCPP forecast office. These data were <br /> <br />proviqed..... in twelve_,5 4minut~ a:yerag~s and update~ hourly. ~ c~. '-"''-"'- <br />s-~\~~.:,,~ c......~o:,i~:~ it;. ~.i2--~ ~~~ ~<f b~L.(. ~ ~<..:~f ....~ --.Jtz . <br /> <br />G':'\1t::h t.l:"~J..ma~Jon, t:h.e fo~ecaste:) issued predictions on <br /> <br />the tYP!:.L-~LW content --;- ~d ~ti~g~_ ,f'i-,~tal pas~age ~Ti thin. the <br />.---- f- ~ "'.......~~...... (-ro I",,"","~ ~c.... ') <br />ARB, (13 ~"Qll- a.i; precipitatiop totals- 'and temperature$"Pat KGV 'for <br /> <br />the six 2-hour time blocks~hese forecasts were made routinely <br />, t . f d' . I?---- .. <br />lrrespec lve 0 present con ltlons. The forecaster also was <br /> <br />re~~ired to choose from a list of possible fro~~_t~es and then <br />k .... h ..... '. . . ....h . .. C~ ><...w- J <br />s e~c l~S pcsl~lon, Wl~ slgnlf~cant features, on crude base <br /> <br />IDa~s (F':-<Q - 1.) <br />- <i /" <br /> <br />Finally, the forecaster was asked to assess proportionately <br />the impo~~a~ce of the various forecast input i~formation (e.g., <br />sa~el:i~e, radar, ffi1C products, local observations, etc.) to the <br />prcd~cticn of his forecast. Once the form was completed it was <br />sealed in an envelo~ and no changes or updates were allowed. <br /> <br />6 <br />