Scattered thunderstorms, heavy showers possible in the mountains - CBS News 8 - San Diego, CA News Station - KFMB Channel 8


flash flood
San Diego, CA

San Diego CA-
934 PM PDT THU AUG 16 2018


At 930 PM PDT, Doppler radar indicated that the heavy rain had ended
west of Borrego Springs. However, major flooding of Borrego Palm
Canyon will likely continue through 1000 PM due to previous heavy
rains just to the west. Radar estimates over 2 inches of rain fell
in the upper reaches of Borrego Palm Canyon. Other locations near
Borrego Springs below canyons could receive flood water and debris
flow, even where little or no rain fell. Persons near, within and
well downstream of canyons should seek higher ground immediately.

Never drive into flood waters, and avoid travel during nighttime
flood events as the flood waters are more difficult to see on the

LAT...LON 3339 11632 3319 11632 3324 11662 3337 11650


Scattered thunderstorms, heavy showers possible in the mountains

Weather Update: Thursday, August 16, 2018 (5:20 a.m)

Scattered thunderstorms in the mountains during the afternoon and evening hours Thursday. High pressure will move westward, drying out but slightly warmer through the weekend. High Monsoonal moisture may return early next week as the high returns over the southern deserts. Overnight/morning low clouds and fog are possible along the coast through the weekend.

A Detailed Look at August 16th:

  • High rip current risk. Water temperature 69-76. South swell, 3-5 ft. South swell increasing through Friday morning. 
  • A Beach Hazards Statement is in effect through Friday evening. Surf from 4-6 ft is possible along south facing beaches. There is an increased risk of ocean drowning from high surf and strong rip currents.
  • High temperatures Thursday mild, around 4 degrees from normal. Coastal highs 76-81, normal around 77. Inland highs 84-89, normal around 89. Mountain highs 84-91, normal around 85. Desert highs 100-105, normal around 106.
  • Thunderstorms possible over the county mountains between 1 PM and 8 PM Thursday. Areas may experience periods of locally heavy rainfall. Rainfall amounts can reach up to 1.5" in some locations, according to high resolution models Thursday morning. Some locations may see higher amounts as more moisture is available in the atmosphere.
  • A Flash Flood Watch will be in effect from noon to 8 PM Thursday for San Diego County mountains. Heavy showers from thunderstorms pose a risk of flash flooding, especially over recent burn scars. Flash flooding and debris flow may pose a hazard to residents and motorists in the mountains and valleys.

The Week Ahead:

  • High pressure east of the Sonoran Desert creates southerly flow above Southern California, bringing high humidity back to the deserts and elevating chances of thunderstorms through Friday.
  • High pressure is forecast to move westward, cutting off the monsoonal flow through the weekend as it passes over Southern California. With the drying, temperatures will warm slightly. Monsoonal flow set to return early next week as the high transits eastward.
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