SDG&E Weather Briefing

Friday, September 30, 2022

Safety Talking Point

Buckle Up / Phone Down

Two of the most important actions drivers can take to prevent crashes and reduce injury if one occurs are using seatbelts on any vehicle in motion and setting their phones aside for a less distracting time to talk or text.

Keep yourself and others around you safe and Just Drive.

Executive Summary

  • A gradual transition to seasonably cool conditions through the weekend
    • Highs in the mid 70’s along the coast, mid 80’s across the inland valleys and foothills, upper 70’s for the mountains, low 100’s for the deserts
    • An isolated backcountry thunderstorm can’t be ruled out this afternoon
  • Warmup returns with moderately above average temperatures by Tue into late next week
  • Morning overcast and coastal fog will transition to sunny afternoon skies daily
  • FPI will be Elevated for all inland districts the next seven days; return to Normal for all coastal districts Fri

 

Forecast Discussion

Seasonably cool temperatures and steady onshore flow will lead to a deepened marine layer west of the mountains this weekend. Dense coastal fog will be prevalent during the mid-morning hours before burning out to mostly sunny skies during the afternoon. By Mon, a weak ridge will build across the state. This will allow daytime temperatures to gradually increase to above average for most of the service territory by Tue into late next week. We don't expect well above average temperatures for the latter half of next week, with daily highs at 5-8° above average. 

Although drier conditions are expected today and for the next seven days, an isolated thunderstorm can't be ruled out across the backcountry this afternoon. Any storm that develops could bring locally heavy rainfall, gusty winds, and cloud-to-ground lightning. Thunderstorm chances should fully diminish by this weekend and next week. No significant weather systems are currently expected to impact our territory, aside from the gradual temperature changes.  

Fire Discussion

Seasonably warm weather today will be coupled with high relative humidity values as onshore flow continues west of the mountains. Given the deepening of the marine layer this weekend, all coastal districts will be Normal through at least early next week. The FPI will remain Elevated for the inland districts the next seven days. Depending on the extent of the marine layer this weekend, NE and EA may need to be briefly switched to Normal. However, as warmer and drier weather builds into the area by mid-next week, all inland districts will certainly return to all Elevated. Conditions that generally warrant a PSPS event are not forecasted for the next seven days.

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 - 13 | Elevated 14 | Elevated < 15 | Extreme

7-Day FPI Outlook

  Fri
9/30
Sat
10/01
Sun
10/02
Mon
10/03
Tue
10/04
Wed
10/05
Thu
10/06
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

12

Elevated

12

OC Normal

11

Normal

11

Normal

11

Normal

11

Normal

11

Normal

11

Normal

11

NC Normal

10

Normal

11

Normal

10

Normal

10

Normal

10

Normal

10

Normal

10

BC Normal

10

Normal

11

Normal

10

Normal

10

Normal

10

Normal

10

Normal

10

CM Normal

10

Normal

11

Normal

10

Normal

10

Normal

10

Normal

10

Normal

10

Forecast Weather Legend

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

Latest 7-Day Forecast

Fri
9/30
Sat
10/01
Sun
10/02
Mon
10/03
Tue
10/04
Wed
10/05
Thu
10/06
EXPECTED WEATHER CONDITIONS
Sunny
Sunny
Sunny
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
BEACHES
64/74 62/72 64/73 63/73 64/74 64/76 65/76
MESAS
66/78 65/76 65/76 65/77 66/78 67/80 66/80
MIRAMAR
64/80 63/77 63/77 63/79 64/80 64/82 65/81
INLAND ORANGE COUNTY
61/79 59/76 60/77 61/79 62/79 62/80 63/82
INLAND VALLEY
64/82 62/79 62/80 63/81 64/81 63/83 64/83
FOOTHILLS
60/86 57/82 59/82 59/85 60/85 59/85 59/86
MOUNTAINS
61/80 58/79 61/78 60/80 60/79 59/81 59/79
DESERTS
73/103 72/100 73/99 73/102 75/102 72/101 72/100
BACKCOUNTRY WINDS
22 19 19 22 19 22 18
CHANCE OF PRECIPITATION
5% 0% 0% 0% 0% 0% 5%

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

AAA Almanac

SAN DIEGO, CALIFORNIA

Materials and information are provided "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability or fitness for a particular purpose. In no event will San Diego Gas & Electric Company be liable to any party for any direct, indirect, special or consequential damages for any use of the materials or information provided herein, including without limitation, any claims or demands for lost profits or business interruption, even if advised of the possibility of such damages.