Flash Flood Warning 17, NWS San Diego, CA

184 
WGUS76 KSGX 240048
FFSSGX

Flash Flood Statement
National Weather Service San Diego CA
548 PM PDT Tue Jul 23 2019

CAC073-240058-
/O.EXP.KSGX.FF.W.0017.000000T0000Z-190724T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Diego CA-
548 PM PDT Tue Jul 23 2019

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN SAN DIEGO COUNTY HAS
EXPIRED...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

LAT...LON 3295 11653 3298 11627 3267 11610 3262 11611
      3260 11631

$$

Moreland

Area Forecast Discussion
National Weather Service San Diego CA
135 PM PDT Tue Jul 23 2019

.SYNOPSIS...
Monsoon flow from the southeast will continue to bring moisture
into southern California through Thursday. This will produce
scattered thunderstorms in the mountains and deserts each day from
late morning through early evening. Isolated to scattered showers
and thunderstorms will also be possible west of the mountains
during the nights and mornings through Thursday. A drying trend
begins Friday and continues through the weekend, with increasing
temperatures inland. Monsoon moisture may return for the early to
middle part of next week.

&&

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

The upper level high remains over the 4-corners area and continues
to provide monsoon moisture to SoCal in southeast flow aloft. The
upper-level feature that brought organized showers/tstms to the
region this morning has moved to the north but a few light showers
continue to move northward across SoCal. In its wake, this
disturbance has left an area of subsidence over SoCal which, along
with the cloud cover from earlier, has delayed the initiation of
tstms over the mtns this afternoon. However a cluster of tstms
has developed over the mtns of Baja about 15-20 miles south of the
border and high resolution models continue to indicate the
development of afternoon tstms over our local mtns. Any tstms that
develop over the mtns this afternoon will have the potential to
produce gusty and erratic winds, hail of varying size, and locally
heavy rainfall which could lead to flash flooding.

From previous discussion...
The center of the 4-corners high will drift to the southwest through
Saturday. This will bring little or no changes for SoCal weather
on Wed and Thu. Moist southeast flow will continue, with good
chances for afternoon tstms in the mtns and deserts as well as
chances for nocturnal light showers/tstms across the region. The
moist and cloudy conditions will continue to mitigate daytime
temperatures...even inland.

For Friday and Saturday...as the 4-corners high continues to drift
to the southwest, the moisture becomes displaced farther south and
the influx of moisture into SoCal decreases. The resulting drier
and more stable conditions will significantly reduce the chances
for showers/tstms and also allow for higher daytime temperatures
inland...especially in the lower deserts where temps could be 5
degrees above seasonal averages.

For Sunday through early next week...the center of the high
pressure is expected to migrate northward again with slight
weakening of the high pressure as well. This should bring a return
of monsoonal moisture for the early to middle part of next week.

&&

.AVIATION...
232000Z...Coast/Valleys...Mostly CLR with high clouds AOA 10000 FT
MSL. In the valleys, SCT-BKN040-070CB for eastern portions of the
valleys with -SHRA and VCTS possible at times. TS/SHRA activity
diminishing after 01Z. Patchy stratus on the coast overnight, with
brief periods of CIGS with bases near 1000 FT MSL possible 13-16Z at
KSAN/KCRQ/KSAN, although confidence is LOW-MOD. Low confidence in
areas of -SHRA developing Wednesday morning, mostly in the valleys
and in SD County.

Mountains/Deserts...Variable clouds, mostly BKN040-070, with areas
of TSRA most prominent over the mtns through 01Z, with decreasing
coverage this evening and overnight. Gusty SFC winds, STG UDDFTS and
frequent lightning will be possible near storms. Otherwise, SCT-BKN
high clouds AOA 15000 FT MSL through Wednesday.

&&

.MARINE...
No hazardous marine weather is expected through Sunday.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
PZ...NONE.

&&

PUBLIC...PG
AVIATION/MARINE...Rodriguez

Special Weather Statement
National Weather Service San Diego CA
226 PM PDT Tue Jul 23 2019

CAZ058-062-232230-
San Diego County Mountains-San Diego County Deserts-
226 PM PDT Tue Jul 23 2019

...STRONG THUNDERSTORMS AFFECTING SOUTHEASTERN SAN DIEGO COUNTY...

At 223 PM PDT, strong thunderstorms were located along I-8 and
Highway 94, between Pine Valley, Boulevard, and Jacumba Hot
Springs. These storms were moving northwest at 15 mph.

Winds in excess of 40 mph are possible with these storms along with
frequent lightning and heavy rainfall.

Locations impacted include...
Mount Laguna, Cuyamaca Rancho State Park, I-8 Between Boulevard And
Imperial County Line, I-8 Between Pine Valley And Boulevard, Pine
Valley, Hwy S2 Vallecito Creek Rd, Hwy S2 Between Canebrake And
Imperial County Line, Boulevard, Hwy S2 Between Agua Caliente And
Canebrake, Fish Creek Wash, Hwy S1 Between Lake Cuyamaca And Mount
Laguna, Hwy S2 Between Shelter Valley And Agua Caliente, Campo, La
Posta Indian Reservation, Canebrake, Agua Caliente, Tierra Del Sol,
Campo Indian Reservation, Live Oak Springs and Jacumba.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 3294 11658 3303 11610 3262 11611 3260 11636
TIME...MOT...LOC 2123Z 136DEG 12KT 3275 11631

Moreland