SDG&E Weather Briefing

Tuesday, September 17, 2019

Safety Talking Point

Distracted Walking

Distractions such as using a cell phone while walking can cause pedestrians to trip, cross roads unsafely, or walk into motionless objects such as street signs, doors or walls. And over half of distracted walking injuries occur in our own homes.

  • Be aware of your surroundings at all times, indoors or out
  • Never walk while texting or talking on the phone
  • If texting, move out of the way of others and stop on the sidewalk
  • Do not walk with headphones in your ears
  • Never cross the street while using an electronic device
  • Always walk on the sidewalk if one is available; if you must walk on the street, face oncoming traffic
  • Look left, right, then left again before crossing the street
  • Cross only at crosswalks

Executive Summary

  • A cooling trend will bring mild weather through the workweek with more extensive morning low clouds
  • Gusty west winds will persist through much of the week on mountain ridges and adjacent desert slopes
  • Warmer weather will accompany weak easterly winds across the backcountry this weekend
  • The FPI will be Normal along the coast and Elevated inland this week; increasing some this weekend

Forecast Discussion

A cooling trend will continue through Thursday as low pressure moves into the West Coast and onshore flow strengthens. High temperatures will be in the 70s and 80s west of the mountains through Wednesday, then mainly in the 70s on Thursday. Night and morning low clouds will gradually become more extensive during the week. By Thursday evening, patchy low clouds could extend into the mountain ridges in places like Volcan Mountain. That being said, marine layer cloudiness will likely not be uniform across the service territory due to the weaker inversion, so expect to see plenty of holes in the marine layer. The strengthening onshore flow will bring locally gusty west winds to the mountain ridges and adjacent desert slopes, strongest in the evenings. No system impacts expected from these winds.

The cooling trend will transition to a slow warming trend for Friday into the weekend. Temperatures will climb back into the 80s in the inland areas. Winds will become easterly across the backcountry, but are forecast to remain below 30 mph in all areas.

Fire Discussion

The FPI will be Elevated inland and Normal for the coastal districts through the next seven days. The FPI in Orange County is forecast to return to Elevated on Saturday. Gusty west winds over mountain ridges and desert slopes, accompanied by low humidity, will be the greatest fire potential this week. Grasses remain fully cured and live fuel moistures throughout the region are at or near the critical level at which the brush component will burn readily.

Today's Fire Potential Index (FPI)

ME RA EA NE OC NC BC CM
Elevated

13

Elevated

13

Elevated

12

Elevated

12

Normal

11

Normal

10

Normal

10

Normal

10

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

7-Day FPI Outlook

  Tue
9/17
Wed
9/18
Thu
9/19
Fri
9/20
Sat
9/21
Sun
9/22
Mon
9/23
ME Elevated

13

Elevated

13

Elevated

13

Elevated

13

Elevated

13

Elevated

13

Elevated

13

RA Elevated

13

Elevated

13

Elevated

13

Elevated

13

Elevated

13

Elevated

13

Elevated

13

EA Elevated

12

Elevated

12

Elevated

12

Elevated

12

Elevated

12

Elevated

12

Elevated

12

NE Elevated

12

Elevated

12

Elevated

12

Elevated

12

Elevated

12

Elevated

13

Elevated

12

OC Normal

11

Normal

11

Normal

11

Normal

10

Elevated

12

Elevated

12

Elevated

12

NC Normal

10

Normal

10

Normal

10

Normal

10

Normal

11

Normal

11

Normal

11

BC Normal

10

Normal

10

Normal

10

Normal

10

Normal

11

Normal

11

Normal

11

CM Normal

10

Normal

10

Normal

10

Normal

10

Normal

11

Normal

11

Normal

11

Forecast Weather Legend

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

Latest 7-Day Forecast

Tue
9/17
Wed
9/18
Thu
9/19
Fri
9/20
Sat
9/21
Sun
9/22
Mon
9/23
EXPECTED WEATHER CONDITIONS
sunny
sunny
partly cloudy
partly cloudy
partly cloudy
partly cloudy
partly cloudy
BEACHES
64/74 62/73 62/71 62/74 63/75 64/75 64/74
MESAS
64/79 64/77 64/75 63/78 63/80 64/80 65/80
MIRAMAR
63/84 62/81 61/74 61/81 61/82 63/82 63/82
INLAND ORANGE COUNTY
59/80 57/77 57/75 57/81 59/84 60/83 60/81
INLAND VALLEY
63/85 61/80 60/76 60/81 61/86 63/84 62/84
FOOTHILLS
58/86 55/81 53/77 52/83 58/87 60/87 58/85
MOUNTAINS
56/77 54/74 52/67 50/76 56/81 59/81 57/80
DESERTS
70/99 67/97 66/94 64/96 67/100 70/101 71/102
BACKCOUNTRY WINDS
25 25 35 30 25 25 25
CHANCE OF PRECIPITATION
0% 0% 0% 0% 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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