Here is my summary of the flight and conditions. I invite all to listen to the audio feed, on liveatc.net look for KRNO-APR-1-2012-0000Z-0030Z.

The actual METAR that the pilots would have seen at time of departure:
KRNO 312155Z 29015G25KT 10SM FEW025 SCT060 OVC085 06/M02 A2967 RMK AO2 PK WND 29035/2103 SLP027 VCSH AND MTNS OBSCD SW-NW MTN TOPS OBSCD DSNT SE T00561017

Other pilots in the forum you can decipher the whole report but the highlights include wind 15 knots gusting to 25 with peak gusts at 35, occasional showers and mountains obscured, visibility at 10 miles and a cloud ceiling at 8500 feet above ground level.

Now fast forward to time of landing:
KRNO 312355Z 23011G28KT 10SM FEW032 BKN050 OVC075 06/M07 A2971 RMK AO2 PK WND 26028/2351 RAE44SNE03 SLP043 MTNS OBSCD DSNT SW-NW P0000 60000 T00561067 10161 20033 51026

The weather stayed relativity the same, wind changed a little to 11 knots gusting to 28 and the report noted that it stopped raining and snowing about 10 minutes prior.

Aircraft were still landing at Reno.

Now for the live action part, note times correspond with the file at liveatc

11:54-QX 259 cleared for the ILS 16R approach

14:15-SWA 758 goes missed, reports wind shear +/- 30 knots

15:20-SWA 758 diverts to San Jose

16:28-QX 259 switches to tower gets report of winds 170 at 10 knots Gust 20 knots. QX 259 pilot asks for condition of wind shear from WN flight, tower replies 'pretty bad.' QX 259 decides to continue.

19:50-QX 259 goes missed reports +/- 25-30 knots on landing.

24:35-QX 259 talks with dispatch and diverts to SMF

29:00-A Rockwell Turbo Commander 690 (N940U, small twin turboprop) lands at Reno.