Flash Flood Warning 31, NWS San Diego, CA

450 
WGUS76 KSGX 170058
FFSSGX

Flash Flood Statement
National Weather Service San Diego CA
558 PM PDT Tue Aug 16 2022

CAC065-170108-
/O.CAN.KSGX.FF.W.0031.000000T0000Z-220817T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Riverside CA-
558 PM PDT Tue Aug 16 2022

...FLASH FLOOD WARNING IS CANCELLED FOR RIVERSIDE COUNTY...

The heavy rain has ended. Please continue to heed any remaining road 
closures.

LAT...LON 3366 11658 3358 11643 3346 11652 3348 11660
      3359 11668

$$

Adams

Area Forecast Discussion
National Weather Service San Diego CA
106 PM PDT Tue Aug 16 2022

.SYNOPSIS...
There will be fluctuations during the next week in monsoonal
moisture and chances for afternoon and early evening thunderstorms
in the mountains and deserts. Today is expected to be similar to
Monday, then a little drier with fewer thunderstorms for Wednesday
and Thursday. Then increasing moisture for Friday and Saturday
with greater chances for thunderstorms and inland high
temperatures not as hot. Then a drying trend for Sunday and Monday
with warmer high temperatures for inland areas early next week as
the drying occurs.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

.SHORT TERM...(Today through Thursday)...
Convection has started to grow and become more widespread over the
mountains, especially near the Big Bear area. These showers and
storms will continue to produce locally heavy rainfall and gusty
winds through the early evening. The marine layer will continue to
be shallow and will bring some cloudy conditions near the coast
this evening into tomorrow morning. Wednesday and Thursday still
look to be slightly drier with PWAT values lowering a bit from
today. Will continue a slight chance of thunderstorms across the
mountain areas during Wednesday and Thursday afternoons as the
monsoonal flow pattern weakens. High temperatures are currently
right near the century mark this afternoon. We will see similar
temperatures for tomorrow, with a slight decrease in temperatures
for Thursday.

&&

.LONG TERM...(Friday into early next week)...
Another surge of monsoonal moisture is expected Friday into
Saturday per latest long-range models. This will lead to a higher
chance of scattered thunderstorms across the mountains and
deserts. Some storms may even drift west for areas of the Inland
Empire and San Diego County on Saturday. Drying is expected by
Sunday into early next week. Temperatures will slowly take a
downward trend by the end of the week, though humid days will
continue.

&&

.AVIATION...
162000Z...Coast/Valleys...FEW low clouds at the beaches this
afternoon but no CIG/VIS impacts at coastal TAF sites through 03Z
Wed. Chances for SCT-BKN low clouds at coastal TAF sites return
after 06Z Wed with bases 700-900 ft MSL. Otherwise, SCT100 with
unrestricted vis through tonight.

Mountains/Deserts...ISOLD-SCT SHRA/TSRA over the mountains and high
deserts this afternoon with CB bases 10,000 feet MSL and tops 35,000
feet. Gusty and erratic winds and brief heavy rain vcnty TSRA.
SHRA/TSRA dissipating by 17/03Z.

&&

.MARINE...
No hazardous marine weather through Friday.

&&

.SKYWARN...
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Heat Advisory until 8 PM PDT Wednesday for San Bernardino and
     Riverside County Valleys-The Inland Empire.

PZ...None.

&&

PUBLIC...APR
AVIATION/MARINE...PG

Special Weather Statement
National Weather Service San Diego CA
142 PM PDT Tue Aug 16 2022

CAZ060-162130-
Victor Valley - Apple Valley - Lucerne Valley - Johnson Valley CA-
142 PM PDT Tue Aug 16 2022

...Strong thunderstorms will impact portions of San Bernardino
County through 230 PM PDT...

At 142 PM PDT, Doppler radar was tracking strong thunderstorms over
northern Lucerne Valley, moving south at 15 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Apple Valley, Lucerne Valley and northwestern Johnson Valley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3441 11711 3472 11707 3475 11665 3443 11650
TIME...MOT...LOC 2042Z 345DEG 14KT 3461 11688

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Adams