Above normal temperatures will continue through mid-week before a strong dry cold front moves in Thursday into Friday….Cool Trof to persist into the upcoming Weekend with Below Normal temperatures Expected

Above normal temperatures along with fast moving rivers and creeks will continues through Mid Week while another cool late spring Trof approaches.  Daytime highs, now in the mid 70s in Mammoth and over night lows in the 40s will give way to highs near 60 by Saturday with over night lows in the upper 20s and low 30s by weeks end.  This is all due to a vigorous Trof that is dropping SE out of the Gulf of AK with its target upon extreme Northern CA Northward. Another round of heavy rainfall is expected along coastal areas of Oregon State.  For much of Central and Northern CA,  it will mean mainly Wind and Cooling with a chance of showers.  High temperature’s will begin to recover by the following Tuesday and the weather for the 50th Mammoth Motocross looks very nice with highs returning to the 70s.

Summer Weather;

It is the opinion of Mammoth Weather, that with the deep Solar Minimum approaching, summers will be increasingly cooler than the past 5 years with stronger more frequent afternoon Zephyr’s.  Normal to possibly below normal temperatures and less thunderstorm days are expected for the Central Sierra. Gulf of AK Trofing will remain stronger with migratory short wave incursions to the Northwest pacific coast creating more wind through the Mammoth Pass this summer, and possibly the summers following for the next 5 years.   The continental high may end up being more squashed east west affecting Southern CA more with summertime thunderstorms with periods of anomalous easterly flow remaining well south of the Central Sierra. Winters may tend to be wetter than normal along the central and northern west coast over all.


Dr Howard and the Dweebs……………….:-)

Beautiful warm Late Spring Weather continues into Tuesday….Then breezy and cooler Wednesday followed by Warmer Weather Thursday into the following weekend…No Important weather changes ahead…

The spring runoff continues in full swing with High pressure aloft bringing above normal temps. This will likely continue into Tuesday with dry warm weather. High temperatures will remain above normal with highs in the 70s. Lows will continue in the 30s. It will be partly cloudy Wednesday with some cooling as a dry trough of low pressure moves through. There may be some wind and afternoon convection. However, with deep snow cover persisting over the higher elevations, model guidance is most likely over done with the heat related chance of showers, over the crest. Most convection will fire up over areas both east and west of the sierra crest because of this reason. Again, It will be cooler and breezy Wednesday with highs in the upper 60s. Ridging will rebuild into the following weekend for a return to the 70s.   Next chilly trof may greet us, about fathers day. Fathers day climatologically is the last frost at resort levels. (8K)

Above normal temperatures have Spring run off in full swing….Upper high over the far west continues to build through mid-week then weakens and redevelops further west allowing a cool down to near normal temperatures in the high country over the holiday weekend and beyond…..

The High Country run off from our record-breaking winter is in full swing this week. Main stem rivers to the north will flood pasture land over areas of Western Nevada.

Upper ridge now building north will begin to weaken this Thursday in response to retrogression of the long wave pattern prior to the holiday weekend. This will pull the Eastern long wave Trof further west and allow cooling of some 8 to 10 degrees over the holiday weekend. But don’t worry about high temps bring too cool. I still expect them to range in the mid to upper 60s for the upcoming holiday weekend…..Or slightly above normal.  As the transition begins, our air mass will become a bit unstable Wednesday and Thursday for some late thunderstorm’s possible of the convective style. These will be diurnal only.

According to the ECMWF 5 day means, a closed upper high once again develops over Alaska very similar to the winter of 2017. (-EPO) This is once again is a blocking pattern and the westerlies will be forced underneath, making for a suppressed storm track. The big thing to remember is that this will be June by then and the effects are just usually cooler weather with more wind and a return to freezing temperatures in the high country at night. This looks to occur during the first week of June.

Normal high temperatures in Mammoth now are low 60s with mid 60s by early June.  Low temps are usually in the mid 30s now.


More Later….


Dr Howard and the Dweebs………………………:-)