SDG&E Weather Briefing

Thursday, May 23, 2019

Safety Talking Point

Mindful Driving

  • Being aware and in the moment helps you evaluate; act upon distant information to avoid mistakes, collisions, etc.; and keeps drivers, passengers, and pedestrians safer.  Focus on what’s in, on, around, and near your vehicle and the road.  Store your phone in the glove box or trunk to help alleviate potential distractions.

Executive Summary

  • Occasional showers likely west of the mountains this morning; improving conditions in the afternoon
  • Mild and dry in most areas Friday and Saturday with a slight chance of afternoon showers over the mountains
  • Another storm system has the potential to bring scattered showers west of the mountains Sunday PM through Monday AM
    • Snow showers possible above 5,500 ft
  • Gradual warming for next week with temperatures returning to seasonal averages by midweek

Forecast Discussion

We are forecasting a slow improvement in our weather today through Saturday.  While we are likely to see occasional light showers from a deep marine layer this morning, afternoon skies should clear out nicely aside from perhaps a stray shower or thunderstorm over the mountains and deserts. Winds will not nearly be as gusty as they've been over the past couple says. Friday is shaping up to be the best day of the forecast period with ample sunshine and warm daytime temperatures. We still cannot rule out a stray shower or two over the mountains in the afternoon, but otherwise the weather will be dry. Saturday will see increasing onshore flow and some minor cooling ahead of our next weather system. Once again, a stray shower cannot be ruled out over the higher terrain during the afternoon, but otherwise dry.

Yet another late-season storm system remains on track to arrive Sunday into Monday with widespread showers and gusty mountain winds.  While there are still some disagreements among our forecast models on exactly how this system will play out, confidence is fairly high that rain and high elevation snow will occur. Greatest chances of precipitation is Sunday afternoon through Monday morning, though the timing could shift as models get a better handle of the speed and trajectory of this system. Snow is possible above 5,500 ft. Gusty winds will be likely in the mountains, particularly on the ridges and desert slopes. At the risk of jinxing it, this could be the last legitimate cold-season storm of the season. The broad area of low pressure that has influenced our weather pattern for the past few weeks will slowly weaken over the western U.S. next week, resulting in milder, more typical late spring/early summer weather conditions. Temperatures may actually return to seasonal levels by the middle of next week. That being said, as long as weak low pressure remains in place, we will be at risk of afternoon showers and thunderstorms over the higher terrain as well as early morning marine layer drizzle west of the mountains. 


Fire Discussion

Unsettled weather and wet fuels will maintain a Normal FPI through the next seven days. Live fuel moistures remain very high. Curing of grasses has slowed recently due to the persistent unsettled weather. Given the amount of rain that has occurred over the past couple weeks and the rain that is yet to come, there is a possibility that some areas of the service territory could see a second green-up of grasses once warmer, drier weather returns. Currently, we do not anticipate any Elevated days through the beginning of June.

Today's Fire Potential Index (FPI)

ME RA EA NE OC NC BC CM
Normal

4

Normal

4

Normal

5

Normal

5

Normal

6

Normal

6

Normal

6

Normal

6

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

7-Day FPI Outlook

  Thu
5/23
Fri
5/24
Sat
5/25
Sun
5/26
Mon
5/27
Tue
5/28
Wed
5/29
ME Normal

4

Normal

6

Normal

6

Normal

4

Normal

4

Normal

5

Normal

6

RA Normal

4

Normal

6

Normal

6

Normal

4

Normal

4

Normal

5

Normal

6

EA Normal

5

Normal

6

Normal

6

Normal

5

Normal

5

Normal

6

Normal

6

NE Normal

5

Normal

6

Normal

6

Normal

5

Normal

5

Normal

6

Normal

6

OC Normal

6

Normal

7

Normal

6

Normal

6

Normal

6

Normal

7

Normal

7

NC Normal

6

Normal

7

Normal

6

Normal

6

Normal

6

Normal

7

Normal

7

BC Normal

6

Normal

7

Normal

6

Normal

6

Normal

6

Normal

7

Normal

7

CM Normal

6

Normal

7

Normal

6

Normal

6

Normal

6

Normal

7

Normal

7

Forecast Weather Legend

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

Latest 7-Day Forecast

Thu
5/23
Fri
5/24
Sat
5/25
Sun
5/26
Mon
5/27
Tue
5/28
Wed
5/29
EXPECTED WEATHER CONDITIONS
rainy
partly cloudy
partly cloudy
rainy
rainy
partly cloudy
partly cloudy
BEACHES
56/64 57/67 57/67 56/65 55/66 57/67 58/69
MESAS
56/66 55/68 56/65 58/62 57/64 57/68 58/70
MIRAMAR
54/66 53/69 54/66 55/62 55/64 54/69 56/72
INLAND ORANGE COUNTY
52/65 51/69 51/68 53/63 52/65 51/69 54/72
INLAND VALLEY
54/65 52/71 54/69 55/64 55/66 54/70 56/73
FOOTHILLS
49/62 48/69 49/66 51/58 50/62 49/69 52/73
MOUNTAINS
40/47 41/62 44/58 39/44 38/48 43/61 47/65
DESERTS
54/75 55/86 59/86 57/75 55/78 57/89 62/93
BACKCOUNTRY WINDS
25 25 30 35 30 25 25
CHANCE OF PRECIPITATION
60% 10% 10% 60% 60% 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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