Winter Storm Warning
URGENT - WINTER WEATHER MESSAGE
National Weather Service San Diego CA
818 PM PST Thu Nov 20 2025
CAZ055-056-211315-
/O.CON.KSGX.WS.W.0004.000000T0000Z-251122T0000Z/
San Bernardino County Mountains-Riverside County Mountains-
Including the cities of Big Bear Lake and Big Bear City
818 PM PST Thu Nov 20 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST FRIDAY...
* WHAT...Heavy wet snow expected above 6500 feet with accumulating
snow as low as 5500 to 6000 feet early Friday morning. Through
Friday afternoon, snowfall of 4 to 8 inches is expected from 6000
to 7000 feet, 7 to 11 inches from 7000 to 7500 feet, and 12 to 16
inches above 7500 feet. Scattered snow showers will continue for
Friday night into Saturday with additional snowfall of 2 to 5
inches.
* WHERE...Riverside County Mountains and San Bernardino County
Mountains.
* WHEN...Until 4 PM PST Friday.
* IMPACTS...Travel could be very difficult. The hazardous conditions
could impact the Friday morning commute.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.
Persons should consider delaying all travel. Motorists should use
extreme caution if travel is absolutely necessary.
&&
$$
CO
Freeze Warning
URGENT - WEATHER MESSAGE
National Weather Service Tucson AZ
1128 PM MST Thu Nov 20 2025
AZZ503-507>509-211600-
/O.CON.KTWC.FZ.W.0009.251121T0900Z-251121T1600Z/
Upper Santa Cruz River Valley/Altar Valley-Upper San Pedro River
Valley-Eastern Cochise County below 5000 feet-Upper Gila River
Valley-
Including the cities of Willcox, Benson, Douglas, Safford, Sierra
Vista, Clifton, and Nogales
1128 PM MST Thu Nov 20 2025
...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM MST FRIDAY...
* WHAT...Sub-freezing temperatures between 23 to 32 degrees expected.
* WHERE...Eastern Cochise County below 5000 feet, Sulphur Springs
Valley, Upper San Pedro River Valley, and Upper Santa Cruz River
Valley/Altar Valley.
* WHEN...Until 9 AM MST Friday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
* ADDITIONAL DETAILS...Probability of subfreezing temperatures for
select locations across the warned area:
-Willcox: 95%
-Benson: 90%
-Patagonia: 90%
-Rio Rico: 90%
-Sonoita: 85%
-Saint David: 90%
-Elfrida: 85%
-Sunizona: 85%
-Douglas: 70%
-San Simon: 80%
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take steps now to protect tender plants from the cold.
To prevent water pipes from freezing; wrap or drain or allow them to
drip slowly.
&&
$$
AWH
Winter Weather Advisory
URGENT - WINTER WEATHER MESSAGE
National Weather Service Las Vegas NV
1220 PM PST Thu Nov 20 2025
NVZ018-211300-
/O.CON.KVEF.WW.Y.0011.251120T2100Z-251121T1600Z/
Sheep Range-
Including the cities of Hayford Pk
1220 PM PST Thu Nov 20 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM PST FRIDAY...
* WHAT...Snow expected. Total snow accumulations between 1 and 3
inches above 6000 feet; between 4 and 8 inches above 8000 feet.
* WHERE...Sheep Range.
* WHEN...Until 8 AM PST Friday.
* IMPACTS...Travel could be very difficult.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. Call 5 1 1 for road
information.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Las Vegas NV
1220 PM PST Thu Nov 20 2025
NVZ019-211300-
/O.CON.KVEF.WW.Y.0011.251120T2100Z-251121T1600Z/
Spring Mountains-Red Rock Canyon-
Including the cities of Mt Charleston and Red Rock Canyon
1220 PM PST Thu Nov 20 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM PST FRIDAY...
* WHAT...Snow expected. Total snow accumulations between 1 and 3
inches above 6000 feet; between 3 and 6 inches above 8000 feet;
between 6 and 8 inches above 9500 feet.
* WHERE...Spring Mountains-Red Rock Canyon.
* WHEN...Until 8 AM PST Friday.
* IMPACTS...Travel could be very difficult to impossible,
particularly along State Routes 156, 157, and 158.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. Call 5 1 1 for road
information.
&&
$$
For more information from the National Weather Service visit
http://weather.gov/lasvegas
VEF
Flood Advisory
Flood Advisory
National Weather Service San Diego CA
1046 PM PST Thu Nov 20 2025
CAC059-073-210730-
/O.CON.KSGX.FA.Y.0087.000000T0000Z-251121T0729Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Orange CA-San Diego CA-
1046 PM PST Thu Nov 20 2025
...FLOOD ADVISORY REMAINS IN EFFECT UNTIL 1129 PM PST THIS EVENING...
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...A portion of Southwest California, including the following
counties, Orange and San Diego.
* WHEN...Until 1129 PM PST.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
* ADDITIONAL DETAILS...
- At 1045 PM PST, Doppler radar indicated moderate to heavy
rain. Minor flooding is ongoing or expected to begin shortly
in the advisory area. Between 0.5 and 1.5 inch of rain has
fallen. Highest rainfall totals have occurred in Orange
County.
- Additional rainfall amounts of 0.25 to 0.5 inches are
expected over the area. This additional rain will result in
minor flooding.
- Some locations that will experience flooding include...
Anaheim, Santa Ana, Irvine, Huntington Beach, Garden Grove,
Oceanside, Orange, Fullerton, Costa Mesa and Carlsbad.
- https://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3384 11806 3390 11798 3395 11798 3395 11792
3378 11772 3351 11751 3324 11720 3315 11735
3334 11751 3344 11765 3346 11772 3359 11788
3361 11790 3366 11788 3361 11791 3374 11811
$$
CO
Flood Advisory
National Weather Service San Diego CA
1036 PM PST Thu Nov 20 2025
CAC059-065-071-073-210945-
/O.NEW.KSGX.FA.Y.0088.251121T0636Z-251121T0933Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Orange CA-Riverside CA-San Bernardino CA-San Diego CA-
1036 PM PST Thu Nov 20 2025
...FLOOD ADVISORY IN EFFECT UNTIL 133 AM PST FRIDAY...
* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...A portion of Southwest California, including the following
counties, Orange, Riverside, San Bernardino and northern San
Diego. Including the Airport Burn Scar.
* WHEN...Until 133 AM PST.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
* ADDITIONAL DETAILS...
- At 1034 PM PST, Doppler radar and automated rain gauges
indicated heavy rain. Minor flooding is ongoing or expected
to begin shortly in the advisory area. Between 0.25 and 0.75
inches of rain have fallen. Rainfall rates of 0.30 to 0.70
inches per hour are possible.
- Additional rainfall amounts of 0.5 to 1 inch are expected
over the area. This additional rain will result in minor
flooding and potentially debris flow over the Airport burn
scar.
- Some locations that will experience flooding include...
Anaheim, Riverside, Irvine, San Bernardino, Fontana, Moreno
Valley, Oceanside, Ontario, Corona and Orange. This advisory
includes the Airport Burn Scar.
- https://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3395 11778 3398 11780 3400 11779 3400 11777
3402 11777 3402 11773 3415 11768 3417 11746
3422 11741 3419 11731 3394 11694 3382 11698
3373 11682 3369 11687 3367 11693 3350 11695
3324 11721 3394 11794
$$
CO
Flood Watch
Flood Watch
National Weather Service Phoenix AZ
112 PM MST Thu Nov 20 2025
AZZ530>533-535-536-CAZ560>570-210415-
/O.NEW.KPSR.FA.A.0009.251121T0700Z-251122T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Parker Valley-Kofa-Yuma-Central La Paz-Southeast Yuma County-Gila
River Valley-Joshua Tree NP West-Joshua Tree NP East-Imperial
County Southwest-Salton Sea-Chuckwalla Mountains-Imperial County
Southeast-Imperial County West-Imperial Valley-Chiriaco Summit-
Palo Verde Valley-Chuckwalla Valley-
Including the cities of Parker, Desert Shores, Plaster City, Lost
Horse-Keys Village, Imperial Hot Mineral Springs, Martinez Lake,
Ocotillo, Salome, Alamorio, Cottonwood Visitor, Quartzsite,
Brawley, Ligurta, Chiriaco Summit, Midland, Harcuvar, Yuma,
Ehrenberg, Ripley, Winona, El Centro, Palm Canyon, Vicksburg
Junction, Vicksburg, Coyote Wells, Palo Verde, Calexico, Mountain
Spring, Blythe, Salton City, Fortuna Foothills, Winterhaven,
Coolidge Springs, and Brenda
112 PM MST Thu Nov 20 2025 /1212 PM PST Thu Nov 20 2025/
...FLOOD WATCH IN EFFECT FROM MIDNIGHT MST /11 PM PST/ TONIGHT
THROUGH FRIDAY EVENING...
* WHAT...Flooding caused by excessive rainfall is possible.
* WHERE...Portions of southwest Arizona, including the following
areas, Central La Paz, Gila River Valley, Kofa, Parker Valley,
Southeast Yuma County and Yuma and California, including the
following areas, Chiriaco Summit, Chuckwalla Mountains, Chuckwalla
Valley, Imperial County Southeast, Imperial County Southwest,
Imperial County West, Imperial Valley, Joshua Tree NP East, Joshua
Tree NP West, Palo Verde Valley and Salton Sea.
* WHEN...From midnight MST /11 PM PST/ tonight through Friday
evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Low-water crossings may be flooded.
* ADDITIONAL DETAILS...
- An approaching weather system is expected to bring heavy
rainfall to SE CA and SW AZ Friday with rainfall totals in
excess of one inch in some areas.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
AR
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Grand Junction CO
155 AM MST Thu Nov 20 2025
COZ001>014-017>023-UTZ022>025-027>029-210900-
Lower Yampa River Basin-Central Yampa River Basin-
Roan and Tavaputs Plateaus-Elkhead and Park Mountains-
Upper Yampa River Basin-Grand Valley-Debeque to Silt Corridor-
Central Colorado River Basin-Grand and Battlement Mesas-
Gore and Elk Mountains/Central Mountain Valleys-
Central Gunnison and Uncompahgre River Basin-
West Elk and Sawatch Mountains-Flat Tops-Upper Gunnison River Valley-
Uncompahgre Plateau and Dallas Divide-Northwest San Juan Mountains-
Southwest San Juan Mountains-Paradox Valley/Lower Dolores River-
Four Corners/Upper Dolores River-Animas River Basin-
San Juan River Basin-Southeast Utah-Eastern Uinta Mountains-
Eastern Uinta Basin-Tavaputs Plateau-Arches/Grand Flat-
La Sal and Abajo Mountains-Canyonlands/Natural Bridges-
155 AM MST Thu Nov 20 2025
This Hazardous Weather Outlook is for northwest Colorado, southwest
Colorado, west central Colorado, east central Utah, northeast Utah
and southeast Utah.
.DAY ONE...Today and tonight.
Accumulating snowfall is likely, mainly for the San Juans today
shifting into the central and northern mountains tonight. Expect a
few isolated thundershowers generally south of I-70 through the
afternoon with lightning and gusty winds the primary threats.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Light accumulating snowfall is likely, mainly for central and
northern Colorado mountains Friday. The San Juan Mountains could see
another round of light snow showers Sunday into early next week with
little if any impacts.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected today or tonight, however
spotters are encouraged to report snowfall amounts to the
National Weather Service in Grand Junction.
$$
