San Bernardino

Flash Flood Watch:

Issued at: 2:40 am PDT on July 30, 2015, expires at: 8:00 PM PDT on July 30, 2015
  • ...Flash Flood Watch remains in effect through this evening... The Flash Flood Watch continues for
  • portions of southeast California and southern Nevada... including the following areas...in southeast California... Cadiz basin...Death Valley National Park...eastern Mojave Desert...eastern Sierra slopes...morongo basin...Owens Valley...western Mojave Desert and White Mountains of Inyo County. In southern Nevada...southern Clark County and the Spring Mountains-Red Rock Canyon.
  • Through this evening.
  • Showers and thunderstorms are expected to develop across portions of southeast California and far southern Nevada on Thursday especially from the mid-morning hours into the early evening hours.
  • Any stronger or slower moving thunderstorms could unleash 1 to 2 inches of rainfall...with locally higher amounts possible in an hour or less. This could lead to flash flooding especially if it falls over any low lying areas or in a wash or canyon that quickly moves water to a lower area.
  • Impacts...roads could be closed due to water flowing over them as well as mud and rocks washing onto them. Roadway pavement may be washed away. Some dirt and secondary gravel roads could be washed out. Rapid rises in washes could also occur leading to flash flooding downstream. Any burn areas...such as the CArpenter 1 burn area on Mt Charleston...could also see debris flows take place if heavy rain falls on or runs onto the burned landscape. Precautionary/preparedness actions... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should flash flood warnings be issued. Stachelski

Flash Flood Watch:

Issued at: 8:16 PM PDT on July 29, 2015, expires at: 8:00 PM PDT on July 30, 2015
  • ...Flash Flood Watch in effect from 3 am PDT Thursday through Thursday evening... The National Weather Service in San Diego has issued a
  • Flash Flood Watch for portions of southwest California...including the following areas...San Gorgonio Pass near Banning...apple and Lucerne valleys...Coachella Valley...Riverside County mountains...San Bernardino County mountains...San Bernardino and Riverside County valleys-the inland Empire...San Diego County deserts and San Diego County mountains.
  • From 3 am PDT Thursday through Thursday evening.
  • Plentiful monsoon moisture and instability will bring the chance for thunderstorms producing heavy rainfall which could result in flash flooding for most of Thursday. An upper level disturbance could bring heavy rains and thunderstorms early Thursday morning...and then slower moving thunderstorms are expected to develop over the mountains...deserts and the inland Empire during the late morning and afternoon hours...and persist into the early evening hours.
  • Recent burn scars will be particularly susceptible to flash flooding and debris flows. Precautionary/preparedness actions... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should flash flood warnings be issued. Harrison

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