The Mount R Fire burned in the early part of the month with minor impacts.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS SGX wrote it up.
The Mount R Fire burned in the early part of the month with minor impacts.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS San Diego, CA wrote its last area forecast discussion before the first event at Jul 3, 12:23 PM PST, 1 hour 37 minutes earlier.
Area Forecast Discussion
National Weather Service San Diego CA
123 PM PDT Fri Jul 3 2020
.SYNOPSIS...
High pressure building over the Southwest will bring warming
through Sunday, when highs will be a few degrees above normal.
The ridge weakens slightly Monday through Thursday, then rebuilds
again next weekend. A shallow marine layer means that any low
clouds and fog will be confined to the coastal zones.
&&
.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
Low clouds have cleared out, even well of the coast, this
afternoon leaving mostly clear skies across the region.
Temperatures at 1 PM were running 5 to over 10 degrees higher than
this time yesterday, with the largest change in the Inland Empire
where there is far less marine layer influence today.
Warmer weather is on the way for the weekend as an upper high
currently centered over southeast New Mexico shifts west-
southwest towards northern Baja, flattening and weakening slightly
as a trough passes through the Pac NW. Highs will return to around
normal for the Fourth of July, then becoming a few degrees above
normal on Sunday. The ridge weakens further on Monday for a degree
or two of cooling. The marine layer will become even more shallow
with the potential for patchy dense fog on the coastal mesas
tonight into Saturday and near the coast Sunday and Monday
mornings.
A trough quickly passes by to the north Tue and Wed for continued
cooling, albeit minor, and some deepening of the marine layer.
Slow warming for Thursday with greater warming Friday as a
stronger ridge of high pressure develops over the Southwest. Highs
Friday should be similar to this Sunday, with even hotter
conditions possible into next weekend.
GFS ensembles have come more in line with the EC ensembles
regarding onset of monsoon moisture by Sunday July 12, though the
location and strength of the upper high is vastly different. The
deterministic EC is on the stronger high/hotter edge of the
ensemble solutions, though the 12Z deterministic run has a
slightly weaker high center than the 00Z run did. The position of
the high in the EC solutions could suppress convection over So
Cal, while the high in the GFS is in a slightly more favorable
location for convection. Will have to continue to see if we will
end up with monsoon activity or oppressive heat beyond next
Friday.
&&
.AVIATION...
032005Z...Coast/Valleys...Mostly clear this afternoon. Low clouds
unlikely to return to coastal areas before 06Z Sat but timing is
uncertain. Any clouds that reach coastal TAF sites will likely have
bases around 600-800 ft MSL and tops around 1000 ft MSL. Clear with
unrestricted vis by 16Z Saturday.
Mountains/Deserts...Mostly clear with unrestricted visibility
through tonight.
&&
.MARINE...
No hazardous marine conditions are expected through Thursday.
&&
.BEACHES...
Long-period south southwest swell will begin to build this afternoon
and generate high surf over the holiday weekend along with strong
rip and longshore currents. Highest surf will be in Orange County
where some 8 foot sets will be likely. The surf will combine with
high tides of 6.6 feet to produce minor tidal overflow at low-lying
coastal locations each evening through Sunday. Locations most likely
to have some flooding include: the north end of Del Mar and the
south end of Cardiff in San Diego County, and parts of Seal Beach,
Sunset Beach and Newport Beach in Orange County.
&&
.SKYWARN...
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.
&&
.SGX WATCHES/WARNINGS/ADVISORIES...
CA...High Surf Advisory from 6 PM this evening to noon PDT Monday for
Orange County Coastal Areas.
Beach Hazards Statement from 6 PM PDT this evening through
Monday morning for San Diego County Coastal Areas.
PZ...NONE.
&&
PUBLIC...SS
AVIATION/MARINE/BEACHES...PGThe national radar mosaic for the moment the first event began.
1 wildfire. Local standard time, as filed.
San Bernardino National Forest reports 62.5 acre Mount R Fire, which closed a portion of California State Route 330 between Live Oak Drive to Highland Boulevard.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2020Every state in 2020This day in weather historyWarnings in California, July 2020
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 910217.