The Ridge Fire burned 310 acres along Highway 138 in the mountains of Los Angeles county. One home was destroyed.
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 LOX wrote it up.
The Ridge Fire burned 310 acres along Highway 138 in the mountains of Los Angeles county. One home was destroyed.
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 Los Angeles, CA wrote its last area forecast discussion before the first event at Jul 27, 12:28 PM PST, 2 hours 32 minutes earlier.
Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 128 PM PDT Mon Jul 27 2020 .SYNOPSIS...27/123 PM. Afternoon temperatures will warm gradually through the next several days and by the end of the week many valley locations will be pushing or into the triple digits. Overnight and morning low clouds and fog will remain closer to the coast each day. && .SHORT TERM (TDY-THU)...27/106 PM. For the next couple days just a lot of the same weather conditions we have seen today. Some shallowing of the marine layer depth is expected as high pressure strengthens along the West Coast but overall cloud coverage won't change much as it's already more or less confined to the coastal zones. With moderate to strong onshore flow in place the beaches will continue to struggle with afternoon clearing with minimal changes in daytime highs. Meanwhile, interior areas will begin a slow warm up that will continue through the week. By Thursday the onshore flow may weaken enough and combine with the strong high aloft to really decrease stratus coverage even closer to the coast, or at the very least allow for a much earlier clearing time. Likely some patchy dense fog though, possibly creating some flight delays and coastal airports. Highs most areas should climb a few more degrees with warmer coastal valleys getting close to 100 and far interior areas like the Antelope Valley close to 105. Beaches should top out in the high 70s but inland coastal areas like Downtown LA and inland Camarillo could get into the mid 80s. .LONG TERM (FRI-MON)...27/123 PM. Looks like the peak of this heat wave will be Friday, though possibly very similar Saturday. Pressure gradients to the north aren't quite as strong as earlier models had predicted but enough to generate some downslope warming across the LA/Ventura Valleys and delay the sea breeze. Warmer valley locations like the western SF Valley should top 100 by at least a few degrees while inland coastal areas get close to 90. Far interior areas like the Antelope Valley will be the hottest with highs in the 104-107 range. These fall short of records by around 5 degrees so not expecting records with this event. However, it's likely Friday that at least the coastal valleys and possibly the mountains will require heat advisories and those could be issued as early as Tuesday if confidence is still fairly high. Overnight lows will warm up slightly but absent any subtropical moisture the air mass will be extremely dry and help temps cool off more so than if it were humid. So the overnight cooling will give some relief to the heat of the day and limit the impacts. On Saturday the ridge remains mostly in place but models showing a slight increase in onshore flow and very slight cooling of the lower levels. So will go with up 3 degrees of cooling, mainly coastal areas, though it's very possible Saturday highs could be either similar or even a touch warmer as we get closer. Especially if the ECMWF is correct which basically shows little if any weakening of the upper high into the middle of next week. Any hints of monsoon flow returning to the area have long been abandoned by the models through at least the end of next week so our streak of convection-free days will continue into the foreseeable future. && .AVIATION...27/1753Z. At 1619Z at KLAX, the marine layer was 1100 feet deep. The top of the inversion was near 2600 ft with a temp of 24C. Low to moderate confidence in coastal TAFs. The marine layer depth of around 1000 feet along with a strong inversion will cause the marine clouds to hang tough at many beaches through the afternoon. Some TAF sites at the coast may not clear out more than intermittently this afternoon. When the marine clouds reutrn to the coastal sections early this evening, widespread IFR conditions are expected tonight into Tuesday morning. High confidence in the valley and desert TAFs. KLAX...Low confidence in TAF. IFR ceilings may occasionally return with the sea breeze this afternoon. Good confidence that an east wind component will be less than 5 kt. KBUR..High confidence in TAF. && .MARINE...27/104 PM. Overall, moderate confidence in forecast. Winds and seas will likely remain below Small Craft Advisory (SCA) level across all the waters through Wednesday. However, there is a 20% chance of SCA level winds from Point Conception to San Nicolas Island each evening through Wednesday. By Thursday afternoon, good confidence in more widespread SCA level winds across the outer waters including along the Central Coast. Good confidence that SCA level winds will last into the weekend. There is also a 30% chance of SCA winds across the Santa Barbara Channel through Wednesday during the afternoon and evening hours. By Thursday and Friday, confidence increases to about 50%. Choppy, short-period seas will be likely across all the waters through the week. Patchy fog, locally dense with visibility down to one mile or less, will likely continue through mid-week across all the waters. && .FIRE WEATHER...27/920 AM. A weak upper level ridge of high pressure will gradually build over the area later today through Tuesday, leading to continued very warm and dry conditions across the interior. Humidities will lower to between 8 and 20 percent across most interior areas today and Tuesday, except locally down to 5 percent across the Antelope Valley on Tuesday. The driest air each day will remain focused across the Antelope Valley and Los Angeles county mountains. Breezy but typical onshore wind gusts between 20 and 35 mph will continue each afternoon and evening over the interior, strongest in the Antelope Valley and adjacent foothills. In addition, there will be local sundowner wind conditions across the western portions of the Santa Ynez mountains and Santa Barbara south coast each evening, with gusts in the 25 to 35 mph range, strongest near Gaviota. While the upper level ridge of high pressure is expected to weaken slightly on Wednesday, it is expected to strengthen over the region Thursday through Saturday, bringing even warmer and drier conditions to much of Southwest California. Some weak northerly offshore flow combined with the warming air mass will likely result in the hottest temperatures occurring Friday through Saturday when triple digit heat is expected to become more common across the warmest valleys, lower mountains, and deserts. Humidities are expected to range between 8 and 20 percent across the interior on Thursday, falling to between 5 and 15 percent on Friday and Saturday when some of the drier air likely becoming more widespread across the valleys and foothills. In addition, there is expected to be poor overnight humidity recoveries across the mountains, deserts, and foothills. Locally breezy northwest to north winds will be possible Thursday night and Friday night across southern Santa Barbara county as well as the Interstate 5 corridor in the Los Angeles county mountains otherwise typical onshore winds each afternoon. Elevated fire weather conditions will continue across the interior valleys, mountains, and deserts through Thursday due to breezy with very warm and dry conditions. By Friday and Saturday, the elevated fire weather conditions are expected to become more widespread with the potential for brief critical fire weather conditions each day across the valleys, foothills, mountains, and deserts due to even hotter and drier conditions combined with locally breezy conditions. && .LOX WATCHES/WARNINGS/ADVISORIES... CA...NONE. PZ...NONE. && .HAZARD POTENTIAL OUTLOOK (THU-MON). There is the potential for widespread elevated fire weather conditions across the valleys, mountains, and deserts Thursday through Saturday due to the combination of very warm temperatures, very low humidities, and drying fuels. && PUBLIC...MW AVIATION...Sweet/Stewart MARINE...Sweet FIRE...Gomberg SYNOPSIS...MW/Kj weather.gov/losangeles
1 wildfire. Local standard time, as filed.
The Ridge Fire scorched 310 acres in the mountains of Los Angeles county, near Highway 138. One home was destroyed by the fire.
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: 914975.