Composite Radar as of 5:14PM, 8/10/26 - Some strong Thunderstorms are moving across I-40 and I-15 through the Mojave Desert. Another batch of cells are drifting Northwest across Imperial and SD County. Some of these cells are capable of frequent lightning and briefly heavy downpours. #SoCal #CAwx

Monsoon activity has been limited across #SoCal over the last 30 days, but Arizona - particularly the higher terrain, has received significant rainfall. Thunderstorms are possible across SoCal Mts/Deserts over the next few days before an approaching Low brings drier Southwest flow aloft. #CAwx.

SE flow aloft will continue across #SoCal this weekend, with chances for afternoon Thunderstorms across local Mts/Deserts. Later next week an upper Low is expected to develop to our West, potentially drawing up moisture from our South for increased chances of Mountain/Desert storms.

NAM Model's Simulated Radar hints at some Thunderstorm development over San Bernardino and San Jacinto Mountains this afternoon as well as over higher elevations of San Diego County. A slight chance for the #SoCal Deserts today as well.

High Pressure will build over the West Coast bringing very hot temperatures to #SoCal this weekend into next week. The position of the Ridge is not favorable for Monsoon moisture for SoCal. Models suggest conditions will be favorable for a return of Monsoon moisture by the 2nd week of August. #CAwx

From NWS Weather Prediction Center (@NWSWPC on X): —— Tuesday key messages for Western U.S. Heat Wave.

Composite Radar as of 12:10pm 7/26/2026 - Mid-level moisture continues to stream across #SoCal from the South today, with the chance for some sprinkles or even a brief shower. Heavier cells are drifting across interior SD County and Low Deserts at the moment. #CaWx

Composite Radar as of 4:40pm 7/20/26 - Monsoonal moisture aloft is moving West across #SoCal. Some of these showers surviving the drier air below on the way down, resulting in some sprinkles and even a brief shower at some locations. #CAwx

With Monsoon clouds & moisture exiting the area, temperatures will increase across #SoCal, with mid/upper 90's across LA/OC Metro areas and triple-digit heat in the Inland Valleys and Deserts on Wednesday & Thursday. Monsoon moisture likely returns to the region next week. #CAwx

Composite Radar as of 12:10pm 7/13/26 - Scattered showers embedded in the moist Monsoon flow are moving Northwest across interior portions of #SoCal. Thundershowers are possible in Mts/Deserts and Inland Valleys today. Chance of a stray shower in Coastal areas as well. #CAwx

NAM Simulated Satellite depiction through Sunday - Monsoon moisture will stream aloft over #SoCal this weekend, peaking Sun/Mon for a chance of Showers and Thunderstorms across local Mts & Deserts & a slight chance along Coastal Areas. Otherwise, expect mid/high clouds and increased humidity #CAwx

Observed measurements of the Niño 3.4 region (black line) have been meeting or exceeding CFSv2 Ensemble guidance since Spring. And CFS continues to adjust the peak upwards for Nov/Dec. Will definitely be watching to see how this will impact West Coast & #SoCal weather this Winter. #CAwx

Summer heat for #SoCal this week. By Sunday, Southeasterly flow aloft will transport Monsoon into the Southwest, bringing a chance for Showers/Thunderstorms to Mts & Deserts. Any disturbances embedded in this flow could trigger storms West of the Mountains. Something to keep an eye on. #CAwx

Our West Coast Trough weakens as we head into the Holiday Weekend & High Pressure builds in next week, bringing warmer Temperatures to #SoCal. Model Guidance suggests High Pressure centered over the 4 Corners area by mid-month - A favorable setup for Monsoonal moisture across the Southwest. #CAwx

HRRR Simulated Radar - A Disturbance near Baja will direct some of the season's first hints of Monsoonal moisture into #SoCal Friday afternoon. Mid/high clouds for Southern portions of the region & a very slight chance of a shower in the Mtns/Deserts of SD, Riverside and Imperial Counties. #CAwx

High Pressure will gradually build in across the West over the next few days. Daytime temperatures in #SoCal will get back up into the low 80's for LA/OC Metro areas next week, with mid to upper 80's Inland Valleys. Coastal locations will see temps in the 70's thanks to the Marine Layer. #CAwx

Latest HRRR Simulated Radar depiction 5/28/26 - One last chance for some showers this evening for #SoCal as the upper Low axis moves through the region before shifting East. Clouds decrease tomorrow and temperatures rebound into the weekend. #CAwx

HRRR Simulated Radar through Friday AM - Chances for drizzle or even a brief shower will continue across #SoCal through Thursday PM before the system clears out, although most locations will remain dry. A warming trend gets underway this weekend as the Low moves off to our East. #CAwx

3KM NAM Simulated Satellite depiction - A cut off Low will spin over Northern California over the next few days. This will strengthen the Marine Layer across #SoCal enough to produce drizzle & light showers during Night & Morning hours through Thursday. #CAwx

Monsoon Outlook from NWS Flagstaff - Likely above average Monsoon rainfall this Summer for #SoCal Mountains and Deserts along with much of the Interior Southwestern US.

'Tis the "May Gray" season - Low Clouds push inland during the overnight hours and linger well into the morning before daytime heating "burns" them off. The cycle repeats again overnight. This will be a common pattern through the next several weeks, which is typical for late Spring in #SoCal. #CAwx

A warm-up gets underway across #SoCal this weekend. If you're close to the Coast you'll likely enjoy the upper 70's and low 80's. By Monday, Inland Valleys will see Temperatures in the 90's, with High and Low Desert locations seeing triple-digit heat. #CAwx

HRRR Model's Simulated Radar depiction through the next 30hrs - A Low Pressure System will move across #SoCal tonight bringing more clouds, cooler weather and chance for a few showers later today through mid-day Tuesday. #CAwx

A series of Cutoff Low Pressure Systems will move through California over the next several days, but these late-season systems will not have much moisture to work with. There will be a chance for some light showers across #SoCal Sunday PM through Monday PM, but most locations will remain dry. #CAwx

HRRR Model's Simulated Radar for Saturday AM through Sunday AM - A weak late season system will bring unsettled weather to #SoCal tomorrow, with some scattered Showers and Snow in the Mountains above 6,000ft. Rainfall will be spotty and some locations will remain dry. #CAwx

Another Pacific Storm will move through California on Saturday, bringing unsettled weather and scattered showers to #SoCal. Amounts are expected to be light. This time it will be areas South and East of LA County that will have the best shot for measurable Rainfall. #CAwx

Composite Radar as of 11:40AM 4/21/26 - A weakening Cold Front is moving Southeast across #SoCal. Light rain will be possible across LA/OC locations this afternoon, but accumulations for LA County and areas South and East of it will be light. Many locations will remain dry. #CAwx

A Cold Front will move through #SoCal tomorrow, rapidly weakening by the time it reaches LA County. Best chance for measurable Rainfall will be in Santa Barbara and Ventura Counties as well as higher elevations across the region. #CAwx

Composite Radar as of 3:08PM - 4/13/26 - Isolated Showers and Thunderstorms continue across #SoCal Inland Valleys, higher elevations, and Deserts this afternoon. Activity should wind down this evening. #CAwx

GOES West Satellite loop 4/13/26 - A Low Pressure System is moving across #SoCal today. Cold air aloft and daytime heating will likely trigger scattered Showers and Thunderstorms through this afternoon, mainly across Inland areas and Foothills/Mountains. #CAwx