SDG&E Weather Briefing

Wednesday, June 03, 2020

Safety Talking Point

JOB SITE SAFETY

• Be sure the work zone is free of tripping hazards

• Keep the “safety focus” throughout the day, from start to finish

Executive Summary

  • Today will be the warmest day of the week with inland highs in the mid 80’s to low 90’s
  • There is a slight chance of a shower or thunderstorm today; no system impacts expected
  • Cooler Thursday through the weekend with temperatures near normal along the coast but below normal inland
  • A deepening marine layer will bring a slight chance of drizzle or very light showers on Saturday morning
  • Gusty west winds expected on the mountain ridges and adjacent desert slopes Friday through the weekend
  • The FPI will remain Normal in all districts through the next seven days

Forecast Discussion

A stalled low pressure system off the coast continues to draw up moisture from the south and radar indicates a line of showers and isolated thunderstorms northwest of Catalina Island and also to our east over the Imperial County deserts. Although there is a slight chance that a shower or thunderstorm could develop within our service territory today, the majority of this activity will remain well to our north and to our east. Therefore, no system impacts are expected.  Today will be the warmest day of the forecast period, especially inland where highs will be in the mid 80's to low 90's. Closer to the coast, the weather will remain mild with highs in the 70's.

The marginally hot weather will only last one day as our stalled low pressure system is finally kicked east Thursday and Friday by a larger West Coast trough. This will bring a cooling trend for the end of the work week, with temperatures returning to near normal along the coast and below normal inland. Some forecast models are indicating a chance for drizzle or light showers on Saturday morning in response to a deepening marine layer. In addition, strengthening onshore flow will bring several days of gusty west winds to the mountain ridges and adjacent desert slopes beginning Friday. Isolated wind gusts in excess of 55 mph are likely, though no system impacts are expected from these winds.

The weather will slowly warm next week as high pressure begins to rebuild over the region. This will also bring a shallower but potentially better organized marine layer to areas near the coast. As a result, highs are likely to remain closer to normal along the coast but a little above normal inland.

Fire Discussion

Grasses in most areas of the service territory are nearly fully cured, so we may begin to see a higher frequency of grass fires. Though live fuel moistures in our brush component are beginning their seasonal decline, they are still above normal for this time of year and will likely not sustain a large fire. Over the next month or so, the presence of the marine layer will fluctuate, but expect higher dead fuel moistures and lower fire activity on days and in areas where thick, low clouds are present. During periods of warmer, drier weather, fine fuels and grasses in the lower elevations and especially on south aspects will be somewhat receptive to ignition, though the potential for wildfires remains quite low. As a result, the FPI will remain Normal through the next seven days.

Today's Fire Potential Index (FPI)

ME RA EA NE OC NC BC CM
Normal

11

Normal

11

Normal

10

Normal

10

Normal

9

Normal

9

Normal

9

Normal

9

< 12 | Normal 12 - 13 | Elevated 14 | Moderate < 15 | Extreme

7-Day FPI Outlook

  Wed
6/03
Thu
6/04
Fri
6/05
Sat
6/06
Sun
6/07
Mon
6/08
Tue
6/09
ME Normal

11

Normal

11

Normal

9

Normal

9

Normal

10

Normal

9

Normal

9

RA Normal

11

Normal

11

Normal

9

Normal

9

Normal

10

Normal

9

Normal

9

EA Normal

10

Normal

9

Normal

8

Normal

9

Normal

9

Normal

9

Normal

9

NE Normal

10

Normal

9

Normal

8

Normal

9

Normal

9

Normal

9

Normal

9

OC Normal

9

Normal

8

Normal

7

Normal

7

Normal

9

Normal

9

Normal

9

NC Normal

9

Normal

8

Normal

7

Normal

7

Normal

9

Normal

9

Normal

9

BC Normal

9

Normal

8

Normal

7

Normal

7

Normal

9

Normal

9

Normal

9

CM Normal

9

Normal

8

Normal

7

Normal

7

Normal

9

Normal

9

Normal

9

Forecast Weather Legend

< 12 | Normal 12 - 14 | Elevated 15 - 17 | Extreme

Latest 7-Day Forecast

Wed
6/03
Thu
6/04
Fri
6/05
Sat
6/06
Sun
6/07
Mon
6/08
Tue
6/09
EXPECTED WEATHER CONDITIONS
partly cloudy
partly cloudy
partly cloudy
cloudy
partly cloudy
partly cloudy
partly cloudy
BEACHES
61/72 60/70 60/68 60/67 59/69 58/71 59/73
MESAS
63/83 62/76 62/71 61/71 59/73 59/75 60/77
MIRAMAR
61/86 61/80 60/71 59/71 58/73 57/76 58/78
INLAND ORANGE COUNTY
59/85 58/77 57/71 56/71 55/73 55/76 57/79
INLAND VALLEY
62/91 62/83 61/72 59/72 57/75 56/78 57/81
FOOTHILLS
58/93 58/87 56/73 54/72 52/76 51/78 53/83
MOUNTAINS
63/89 62/83 54/66 49/66 48/69 49/72 51/76
DESERTS
72/110 73/109 68/92 61/91 61/94 61/94 63/97
BACKCOUNTRY WINDS
25 30 35 35 30 25 25
CHANCE OF PRECIPITATION
5% 0% 0% 20% 0% 0% 0%

Forecast Weather Legend

High Heat (above 95F) Illness Prevention measures are mandated by Safety Standard G 8366: Pre-shift meeting to review preventive, cool down, and communication measures; Shade & 1 quart of cool water per hour per crew member required. Supervisors to observe for employee heat illnesses, or use a buddy system or regular communication with sole employees. Shading indicates Heat Illness Prevention (heat wave at or above 80F) measures are mandated by Safety Standard G 8366: Shade & 1 quart of cool water per hour per crew member required. Supervisors to observe for employee heat illinesses.
Shading Indicates low temperatures in this region are expected to be at 40 degrees Fahrenheit or lower Shading Indicates low temperatures in this region are expected to be at 32 degrees Fahrenheit or lower

Tide Report

LA JOLLA, SCRIPPS PIER, CALIFORNIA

Almanac

SAN DIEGO, CALIFORNIA

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