Red Flag Warning in San Diego and Riverside counties.
October 21, 2017, 9:40:00 PM to October 24, 2017, 6:00:00 PM
San Diego County Inland Valleys-Riverside County Mountains-
Including The San Jacinto Ranger District Of The San Bernardino
National Forest-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-San Gorgonio Pass Near Banning-
Orange County Coastal Areas-Orange County Inland Areas-
940 PM PDT Sat Oct 21 2017
...RED FLAG WARNING REMAINS IN EFFECT FROM 6 AM SUNDAY TO 6 PM
PDT TUESDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY...
* WIND...For Sunday...areas of northeast winds 15 to 25 mph with
gusts to 35 near the coastal foothills and below passes and
canyons. Stronger and more widespread winds for Monday and
Tuesday with northeast winds 20 to 30 mph with gusts to 55
* HUMIDITY...Lowest daytime humidity of 5 to 10 percent
Sunday...and around 5 percent Monday and Tuesday with poorest
overnight recovery in the windier areas near the coastal
* TIMING...Through Tuesday...with the most extreme combination
of low humidity...stronger and more widespread winds...and
heat on Monday and Tuesday.
* OUTLOOK...Winds will weaken Wednesday with some improvement
* IMPACTS...Any fires that develop will likely spread rapidly...
especially Monday and Tuesday. Outdoor burning is not
A Red Flag Warning means that critical fire weather conditions
are either occurring now....or will shortly. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.
Excessive Heat Warning in San Diego, San Bernardino and Riverside counties.
October 21, 2017, 9:17:00 PM to October 24, 2017, 8:00:00 PM
URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
917 PM PDT Sat Oct 21 2017
...VERY HOT IN THE COASTAL AND VALLEY AREAS MONDAY AND TUESDAY...
.Santa Ana winds and strong high pressure aloft will bring hot
weather Sunday through Wednesday. Monday and Tuesday will be the
hottest days with highs above 100 in the valleys and some coastal
areas. Temperatures may not fall below 70 Monday night in some of
the windier coastal foothill locations. Still very warm Wednesday
with highs in the 90s. Cooler Thursday and Friday.
San Diego County Coastal Areas-
San Bernardino and Riverside County Valleys-The Inland Empire-
San Diego County Valleys-Orange County Coastal Areas-
Orange County Inland Areas-
Including the cities of Vista, Carlsbad, Encinitas, Chula Vista,
National City, San Diego, Riverside, San Bernardino, Ontario,
Moreno Valley, Fontana, Rancho Cucamonga, Corona, Escondido,
El Cajon, San Marcos, La Mesa, Santee, Poway, Huntington Beach,
Costa Mesa, Santa Ana, Anaheim, Garden Grove, Irvine, Orange,
Fullerton, and Mission Viejo
917 PM PDT Sat Oct 21 2017
...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 10 AM MONDAY TO
8 PM PDT TUESDAY...
* TEMPERATURE...Highs in the 90s near the coast and from 97 to
107 in Inland Orange County, the western Inland Empire and
western valleys in San Diego County. The beaches will not be
quite as hot with highs mostly in the 80s.
* IMPACTS...Heat related illness is likely for those involved in
strenuous outdoor activity, or those with health conditions
that do not have adequate access to air conditioning. If
untreated, heat illness events could be fatal. Never leave
children or pets inside a parked car!
* OUTLOOK...Still very warm Wednesday. Gradual cooling Thursday
An Excessive Heat Warning means that a prolonged period of
dangerously hot temperatures will occur. The combination of hot
temperatures and high humidity will combine to create a dangerous
situation in which heat illnesses are likely. Drink plenty of
fluids...stay in an air-conditioned room...stay out of the sun...
and check up on relatives and neighbors.
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