DesertUSA has the following reports
Overview Rainstorms in California’s deserts, Arizona and Nevada. Still early, but we could have a good 2017 wildflower seasons in most areas.
Joshua Tree They’ve had lots of rain and many plants are starting to put out leaves. We didn’t see many wildflowers yet, but between mile markers 28 and 29 on the Pinto Basin Road I stopped to look at many blooming Bladderpods and shot some not very good pictures of blooming Filaree (Erodium cicutarium) by the side of the road.
See early season reports at Desert Wildflower Reports – DesertUSA