Another surge of extremely humid air from the southeast created sultry conditions today in the Coachella Valley. Dewpoints surged up to between 75 and 80 degrees this morning, which is commensurate with conditions sometimes experienced in Florida.
At 6:00 am this morning, Palm Springs Airport reported the following observation:
- Temperature: 86 degrees
- Humidity: 77%
- Dewpoint: 78 degrees
Moist southeast flow banking up against our nearby mountains caused the air to rise and condense, forming a layer of grey low clouds and even patchy drizzle in the valley between about 6-9 am. The satellite imagery this morning showed these localized clouds, with the mountains forming a barrier to the clouds, trapping them between the San Jacinto Mountains and the Little San Bernardino Mountains in Joshua Tree National Park.
I've outlined the cloud cover that matches the topography of the nearby mountains surrounding the Coachella Valley (dotted black line).
Also, the large Holy Fire in Orange County can be seen (outlined in red). The smoke this morning was blowing north into the Inland Empire, and up and over the Cajon Pass into the Victorville area.
For later tonight, all eyes will be to the east and southeast of us. Currently, large thunderstorm complexes are forming along the Mogollon Rim of Arizona, northeast of Phoenix... as well as over Sonora, Mexico. If these storms hold together and move west across the Arizona deserts, there is a renewed chance of outflows and even another haboob pushing into Western Arizona later tonight.
If these storms continue, they could move into our area later tonight, likely after 11pm and into the early morning hours. It is a relatively remote chance, perhaps 10% or so, but it's worth mentioning that we could be awakened by a thunderstorm or a potential dust storm under such an unpredictable weather pattern.
Late afternoon satellite showed thunderstorms exploding over Arizona and Northwest Mexico.
As mentioned in earlier posts, we will be vulnerable to any activity to our east for the next 2 days or so. Then, we expect a few days of drier weather over the weekend before another surge of humidity returns next week.