Little Brush conditions
Little Brush Creek Cave is in a unique position among Utah caves. It is relatively easy to find and access, making it well known. However, it is most dangerous to visit during the warm months of the year, which is opposite of most caves in the state. This is due to the entrance being in the bottom of a streambed that takes considerable amounts of runoff in spring, and irrigation water in the summer. This makes it critical to assess weather and other conditions before visiting!
Some of the useful places to check snow and water conditions in the nearby area:
http://www.wcc.nrcs.usda.gov/nwcc/sntl-data0000.jsp?site=559&days=0&state=ut
http://waterdata.usgs.gov/nwis/uv?09261700
Make certain to play with the time frames to get a better picture of what "normal" looks like. A steady 7 day decline in water flow in June could still be 10-20 times what the flow in October will be.
2011 Spring
Mid April: According to the Snotel stations, snowpack is losing a half an inch of water a day. Also, flow in the rivers below has tripled in the last couple weeks. Typically streamflow will shoot up 10-20x its winter baseline, so still a long way to go from here. But spring meltoff has definitely begun!
Early April: I have heard that water flow from the spring downstream from the cave has started to pick up. There are not yet reports of surface flow entering the cave, but it is only a matter of time. Probably best to stay out of the cave until fall.
2010-2011 Winter
The Glowing Stream is not the obvious route it has been the last few years. There have been multiple groups that have missed the turnoff after Broadway, ending up going down the historic passages and over to Onyx Canyon. There is a 30+ foot drop from the Onyx Passage down into Onyx Canyon, with no nearby reliable rope placement. We will have to see what happens with the runoff in 2011.