Normal high/ low temperatures for May 25-June 1 (high/low) Redding 85/56, Chico 84/53, Quincy 76/40, Chester 72/39, Susanville 73/42, Grass Valley 75/48, Weaverville 80/42, Mt. Shasta 72/43, Yreka 76/43, Alturas 72/38
A strong high pressure area is over the western U.S. and will remain there through Thursday (see map below). Northern California will be sunny with daytime temperatures 10 to 15 degrees above normal. This means areas in the north end of the valley will see their first 100 degree reading of the year. Winds will be light.
Note the weak low pressure area in the lower left corner of this morning's satellite picture (below). This low will move slowly northward and will clip Northern California Saturday. Friday temperatures will cool a few degrees and clouds will increase in the afternoon. South winds will also increase in the afternoon. Friday evening through Sunday morning we will see a few clouds with showers and possible thunderstorms mainly over the higher elevations. Temperatures will be below normal Saturday and Sunday.
Monday looks sunny and warmer and then there may be another weak upper level low pressure area along the coast by Tuesday, which could trigger more mountain thunderstorms.
The Old Forecaster