| Day | Date | High/Low | Forecast |
| Mon | 1st | 71/59 | Sunny remainder of day. Chance of late evening low clouds. |
| Tue | 2nd | 71/60 | Early morning low clouds likely; Otherwise, mostly sunny day. Chance of late evening low clouds. |
| Wed | 3rd | 72/61 | Early morning low clouds likely; Otherwise, mostly sunny day. Mostly clear evening. |
| Thu | 4th | 73/60 | Chance of early morning low clouds; Otherwise, mostly sunny day. Mostly clear evening. |
| Fri | 5th | 72/59 | Chance of early morning low clouds; Otherwise, mostly sunny day. Evening low clouds likely. |
Synopsis
We’ve reached that time of year when changes in the wind flow pattern (affecting southern California) can be subtle. Upper level pressure systems don’t always align well with what’s going on near the surface. Weak upper low pressures have passed through or near the Southland in recent days, but they’ve resulted in minor day to day weather changes near the coast (modest but more noticeable temperature changes for coastal valleys and more so in the interior). More of the same is predicted for this week. High pressure aloft in the eastern Pacific should nose into the state on Wednesday/Thursday, but its center is expected to stay well out at sea. So, the predicted, low level wind flow changes shouldn’t be major. For areas near the coast that includes UCLA, day to day temperature changes may be hard to discern. On the other hand, some subtle wind shifts in the lower atmosphere could lead to greater weather changes than I anticipate (as of today). This includes how extensive and persistent coastal low clouds may be on any given day. In short, don’t be surprised if the low cloud pattern and temperature trends don’t quite match up this week.
By the middle of next week, there are some computer models showing a moderately strong high pressure developing somewhere in the West. The pattern could last several days (at least through mid-month). The models, however, don’t agree on where the high pressure center may set up. Some show high pressure right over the state. Much warmer than normal weather could occur even at the beaches for a few days (late next week or over subsequent weekend). There are a number of model solutions favoring the desert Southwest. The Southland desert would sizzle, but all that heat may set up a good, surface on-shore flow. That, in turn, could support a shallow but effective marine layer (limits warming trend near the coast…UCLA could stay under 80 degrees late next week). Other in between scenarios also exist. So, I can’t say much about next week’s weather trend with confidence (other than a noticeable warming trend is probable somewhere in the Southland).
Next issued forecast/synopsis should be on Friday, 5 June.