Day Two: Heat and Humidity Striking Southland With Inland Thunderstorm Watch In Place


Day two is happening with high heat and added humidity across Southern California with my issued Thunderstorm Watch for the Inland areas east of Los Angeles and Orange County.  Read on for details on what to expect.

Ran the thunderstorm model again this morning and it came up with areas east of the Los Angeles/Orange County zones under the gun for the risk of thunderstorms.  The model was update early this morning and the official thunderstorm watch went out shortly after.  Just a bit after it the first thunderstorm formed over Baldwin Lake, in the Big Bear Lake area.  The fires in those areas will continue to have thunderstorm hitting so there could be some relief there.

Upper divergence on the southwest edge of the monsoon ridge will be the focal point for lift today in the thunderstorm watch area.  As the heating moves along with the instability these will turn into thunderstorms.

The most severe should be in the San Bernardino Mountains where flooding is possible.  This is good for the current fire in the area.  The Eastern Inland Empire will see the risk of thunderstorms as well.

Outflow from storms in San Diego County will move east into Imperial County and ignite the convergence zones there as well.

Storms are expected to develop surrounding the Coachella Valley today.  These storms will be slow moving and have variable direction of movement to them.  Storms today could leak into the valley off any direction .. and this advisory is for the chance of flooding along the flood channels into the region.

We should have a break in the metros on Sunday with more of a mountain/desert thunderstorm event as the steering flow for storms does go onshore once again so more of a nominal southwest to northeast motion.

Deeper monsoon moisture is expected to make it further west after the weekend and each impulse will be monitored on.  Depending how today goes, the thunderstorm model is still undergoing tests and with each event it will get more accurate. So far it nailed the Big Bear Lake storms right at the center.

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Things to keep in mind with this event.

  1. This is monsoonal moisture, moisture from Mexico/Arizona and it will vary who gets what.  You could get a downpour while the next city sees nothing.
  2. The overnight lows will be in the upper 70s to even 80 over the weekend.  This means that sleep will be tough without AC.
  3. Rolling black-outs will happen with this event.  The power consumption will be too great, especially overnight.  Prepare for power to go out.
  4. Official Heat Warnings are out at Southern California Weather Force.
  5. I am taking on official duties and forecasts for this event so keep tuned to Southern California Weather Force on Facebook for updates.
  6. Drink plenty of water and eat saltine crackers to replenish the salt lost in the body.
  7. Don’t leave pets and kids in the cars.  Window patrollers will be everywhere.
  8. Check the elderly neighbors or the sensitive to heat during peak hours.
  9. STAY SAFE.  I wouldn’t be hiking.

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