SDG&E Weather Briefing

Tuesday, November 19, 2019

Safety Talking Point

Safety Tips for Driving in the Rain

  • Before leaving the base, make sure that all vehicle safety equipment is functional – this includes all lights, windshield wipers, defroster and brakes.
  • Perform a Circle of Safety before moving your vehicle.
  • Use the five Smith System® Keys (Aim High in Steering, Get the Big Picture, Keep Your Eyes Moving, Leave Yourself an Out and Make Sure They See You).  Click here to print a PDF version.
  • Be sure your headlights are on to help you see the road and help other drivers see you.
  • Increase your following distance in wet weather.
  • Stay toward middle lanes – water tends to pool in outside lanes.
  • Be more alert watching for brake lights in front of you. When you need to stop or slow, do not brake hard or lock the wheels and risk a skid. Maintain mild pressure on the brake pedal.
  • Watch out for places where floodwater collects, particularly low-lying roads adjacent to streams, and dips under rail or highway bridges.
  • Never drive through moving water if you can’t see the ground through it; your vehicle could be swept off the road

Executive Summary

  • Periods of showers this evening through Thursday; widespread significant rainfall possible
    • The NWS has issued Flash Flood Watch for the SDG&E service territory
    • Storm total rainfall 0.75” to 2.50” except 0.25” to 0.75” in Orange County
    • Isolated thunderstorms possible this evening through Wednesday
  • Locally gusty winds on the mountain ridges and desert slopes tonight through Wednesday
  • High temperatures will be in the 70s today, then only in the 60s the remainder of the week
  • The FPI will become Normal in all districts Wednesday through the weekend

Forecast Discussion

Our first storm of the season is forecast to move into the service territory later this evening through Thursday, bringing with it significantly cooler weather and the potential for widespread significant rainfall. This has prompted the National Weather Service to issue a Flash Flood Watch for the SDG&E service territory. In short, a band or two of showers and isolated thunderstorms is forecast to develop later this evening. Showers will become widespread on Wednesday with a continued threat for isolated lightning strikes. Showers will become less numerous on Thursday, before tapering off early Friday morning. The heaviest rain is forecast to occur on Wednesday. While we could see some weather-related impacts to the system from rain and occasional lightning, our first storm of the year is primarily going to be beneficial in nature. See summary of details below.

  • Timing: Tuesday evening through Thursday night; heaviest on Wednesday
  • Rainfall: 0.75" to 2.50" in San Diego County and 0.25" to 0.75" in Orange County
  • T-Storms: Lightning is possible in the service territory this evening through Wednesday
  • Winds: Local gusts to 55 mph on mountain ridges and desert slopes tonight through Wednesday
  • Temperatures: Highs ranging from the 60s along the coast to the 40s in the mountains
  • System Impacts: Some weather-related impacts possible, mainly from the typical rain-related issues and occasional lightning strikes


Fire Discussion

Conditions will begin to improve today, with the FPI becoming Normal in all districts by Wednesday after the onset of widespread rain late Tuesday night. Though the rain should let up by Thursday evening, the fuels throughout the service territory are expected to be sufficiently soaked for the FPI to remain in Normal into early next week.

Today's Fire Potential Index (FPI)

ME RA EA NE OC NC BC CM
Elevated

12

Elevated

12

Elevated

12

Elevated

12

Normal

11

Normal

11

Normal

11

Normal

11

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

7-Day FPI Outlook

  Tue
11/19
Wed
11/20
Thu
11/21
Fri
11/22
Sat
11/23
Sun
11/24
Mon
11/25
ME Elevated

12

Normal

8

Normal

8

Normal

9

Normal

10

Normal

11

Normal

11

RA Elevated

12

Normal

8

Normal

8

Normal

9

Normal

10

Normal

11

Normal

11

EA Elevated

12

Normal

8

Normal

9

Normal

9

Normal

10

Normal

11

Normal

11

NE Elevated

12

Normal

8

Normal

9

Normal

9

Normal

10

Normal

11

Normal

11

OC Normal

11

Normal

9

Normal

9

Normal

10

Normal

10

Normal

11

Normal

11

NC Normal

11

Normal

9

Normal

9

Normal

10

Normal

10

Normal

11

Normal

11

BC Normal

11

Normal

9

Normal

9

Normal

10

Normal

10

Normal

11

Normal

11

CM Normal

11

Normal

9

Normal

9

Normal

10

Normal

10

Normal

11

Normal

11

Forecast Weather Legend

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

Latest 7-Day Forecast

Tue
11/19
Wed
11/20
Thu
11/21
Fri
11/22
Sat
11/23
Sun
11/24
Mon
11/25
EXPECTED WEATHER CONDITIONS
cloudy
rainy
rainy
partly cloudy
partly cloudy
partly cloudy
partly cloudy
BEACHES
56/67 55/65 52/65 51/65 51/66 51/66 51/66
MESAS
60/71 57/63 54/64 53/67 53/70 52/69 53/70
MIRAMAR
57/73 55/62 51/64 49/67 50/71 50/70 50/70
INLAND ORANGE COUNTY
57/73 53/64 50/64 50/66 50/70 49/70 49/70
INLAND VALLEY
56/74 53/60 50/63 47/68 48/70 48/71 48/70
FOOTHILLS
52/73 51/57 47/59 44/66 46/69 45/70 45/70
MOUNTAINS
55/66 39/46 41/49 43/53 45/56 44/59 45/59
DESERTS
55/82 54/64 49/67 47/70 47/73 49/76 48/75
BACKCOUNTRY WINDS
25 35 20 25 25 20 20
CHANCE OF PRECIPITATION
30% 100% 100% 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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