Alert archive / California / Winter Storm Warnings in 2021
Winter Storm Warning 8, NWS San Diego, CA
NWS San Diego, CA issued this winter storm warning at Dec 28, 2021, 1:26 PM PST for Riverside County, San Bernardino County, San Diego County, California. It took effect at Dec 29, 2021, 1:00 AM PST. It was in force for 43 hr. 25 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Dec 28, 2021, 1:26 PM PST (21:26 UTC)
- In effect from
- Dec 29, 2021, 1:00 AM PST
- Expired
- Dec 30, 2021, 8:00 PM PST
- In force
- 43 hr
- Issued by
- NWS San Diego, CA
Counties Riverside County, CA, San Bernardino County, CA, San Diego County, CA
The radar
The Santa Ana Mts radar (KSOX), 122 km from the middle of the area, began a volume at 21:28 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Dec 29, 1:46 PM PST | HEAVY SNOW 4 | 1 Se Lake Arrowhead, CA | HEAVY SNOW AND DOWNED TREES BLOCKING KUFFEL CANYON ROAD IN BOTH DIRECTIONS AT HIGHWAY 18. |
| Dec 29, 1:46 PM PST | HEAVY SNOW 6 | 1 Se Lake Arrowhead, CA | HEAVY SNOW AND DOWNED TREES BLOCKING KUFFEL CANYON ROAD AT HWY 18 IN BOTH DIRECTIONS. |
| Dec 29, 6:11 PM PST | SNOW 4 | 2 Wnw Crestline, CA | POWERLINE DOWN ON ROADWAY. 21611 SAWPIT CANYON RD. AREA HAS WET SNOW ON TREES AND CURRENTLY AT SNOW LEVEL 5000 FEET WITH TEMPERATURES 33-35F. 0.5 TO 1 INCH OF PRECIPITATION PAST 6 HOURS. |
| Dec 29, 6:17 PM PST | SNOW 5 | 3 Wsw Lake Arrowhead, CA | TREE AND POWERLINES DOWN ON HIGHWAY 189 AND VEHICLES TRAPPED. NEAR STRAWBERRY PEAK. TEMPERATURES 30-32F AT 5500 FEET AND SNOW LEVEL AT 5000 FEET. AREA HAS RECEIVED 5 INCHES OF SNOW AND RIME ICING PAST 36 HOURS. PRECIPITATION ONGOING AT THE TIME OF INCIDENT. EL |
| Dec 29, 6:32 PM PST | SNOW 7 | 1 Se Lake Arrowhead, CA | OAKMOUNT LANE HAS TREE DOWN WHICH TOOK OUT 2 POWERLINES AT OF 922 PM. TEMPERATURES 31 TO 32F AT 5500 FEET. AREA HAS RECEIVED 5-7 INCHES OF SNOW MONDAY NIGHT AND 24-30 HOURS OF RIME ICING. HUMIDITY 100 PERCENT AND WET SNOW FALLING WITH SNOW LEVEL NEAR 5000 FEET |
| Dec 29, 6:46 PM PST | SNOW 7 | 2 W Lake Arrowhead, CA | POWERLINE DOWN ON LAKE FOREST ROAD. TWIN PEAKS AND LAKE ARROWHEAD. TEMPERATURES 31 TO 32F AT 5500 FEET. AREA HAS RECEIVED 5-7 INCHES OF SNOW AND 24-30 HOURS OF RIME ICING. HUMIDITY 100 PERCENT AND WET SNOW FALLING WITH SNOW LEVEL NEAR 5000 FEET AT THE TIME. |
| Dec 29, 6:48 PM PST | SNOW 7 | 1 Se Lake Arrowhead, CA | OAK ROAD HAS POWER LINE DOWN. NUMEROUS CALLS TO SCE FOR POWER OUTAGES AND LINES DOWN. TEMPERATURES 31 TO 32F AT 5500 FEET. AREA HAS RECEIVED 5-7 INCHES OF SNOW MONDAY NIGHT AND 24-30 HOURS OF RIME ICING. HUMIDITY 100 PERCENT AND WET SNOW FALLING WITH SNOW LEVE |
| Dec 29, 7:29 PM PST | SNOW 7 | 2 Wsw Lake Arrowhead, CA | BEAR SPRINGS ROAD AND LAKEVIEW LANE. POWERLINE DOWN ON LAKEVIEW ROAD. TEMPERATURES 31 TO 32F AT 5500 FEET. AREA HAS RECEIVED 5-7 INCHES OF SNOW AND ABOUT 24 HOURS OF RIME ICING. HUMIDITY 100 PERCENT AND LIGHT WET SNOW FALLING WITH SNOW LEVEL NEAR 5000 FEET AT |
| Dec 29, 7:43 PM PST | SNOW 7 | Lake Arrowhead, CA | LIVE WIRE DOWNED ON WEST VICTORIA COURT ON VEHICLE AS OF 956 PM. INCIDENTS BEGAN 2 PM IN THIS AREA. TEMPERATURES 31 TO 32F AT 5500 FEET. AREA HAS RECEIVED 5-7 INCHES OF SNOW AND 24-30 HOURS OF RIME ICING. HUMIDITY 100 PERCENT AND WET SNOW FALLING WITH SNOW LEV |
| Dec 29, 7:49 PM PST | SNOW 5 | 1 Ssw Lake Arrowhead, CA | MEADOW BROOK DRIVE AND MECHAM DRIVE. LANES BLOCKED BY TREE AND SNOW. CREST PARK IS 32F CURRENTLY. TEMPERATURES 31 TO 32F AT 5500 FEET. AREA HAS RECEIVED 5-7 INCHES OF SNOW MONDAY NIGHT AND 24-30 HOURS OF RIME ICING. HUMIDITY 100 PERCENT AND WET SNOW FALLING WI |
| Dec 29, 8:02 PM PST | SNOW 7 | 2 Wsw Lake Arrowhead, CA | HIGHWAY 189 LIVE WIRE DOWN ON ROADWAY TO BLUE JAY. CHP HAS CLOSED HIGHWAY 189. NUMEROUS WIRES AND TREES DOWN IN AREA TO LAKE ARROWHEAD. TEMPERATURES 31 TO 32F AT 5500 FEET. AREA HAS RECEIVED 5-7 INCHES OF SNOW AND 24-30 HOURS OF RIME ICING. HUMIDITY 100 PERCEN |
| Dec 29, 8:04 PM PST | SNOW 9 | Running Springs, CA | OCEAN VIEW DRIVE AND CITY CREEK ROAD. TREE DOWNED AND COVERED IN SNOW BLOCKING LANE. TEMPERATURES 30 TO 31F AT 5800 TO 6200 FEET. AREA HAS RECEIVED 7-9 INCHES OF SNOW MONDAY NIGHT AND 24-30 HOURS OF RIME ICING. HUMIDITY 100 PERCENT AND WET SNOW FALLING WITH SN |
| Dec 29, 8:52 PM PST | SNOW 5 | 3 W Lake Arrowhead, CA | LA CASITA DR A TREE REPORTED DOWN BLOCKING ROAD. AREA HAS HAD 0.5 TO 0.75 PRECIPITATION WATER EQUIVALENT (SNOW) PAST 6 HOURS AND IS 32F WITH SNOW LEVEL AT 5000 FEET. RECENT SNOWFALL OF 5 TO 8 INCHES AND RIME ICING CAUSING HEAVY LOADING ON TREES PAST 36 HOURS. |
| Dec 29, 9:37 PM PST | SNOW 9 | Running Springs, CA | VALLEY RIDGE DRIVE AND WILDERNESS ROAD. POWERLINE DOWN ON ROAD. TEMPERATURES 30 TO 31F AT 5800-6500 FEET. AREA HAS RECEIVED 9 INCHES OF SNOW MONDAY NIGHT AND 24-30 HOURS OF RIME ICING. HUMIDITY 100 PERCENT AND WET SNOW FALLING WITH SNOW LEVEL NEAR 5000 FEET AT |
| Dec 29, 9:52 PM PST | SNOW 7 | 2 Wsw Lake Arrowhead, CA | POWERLINE DOWN ON SUGAR CONE LANE. TEMPERATURES 31 TO 32F AT 5500 FEET. AREA HAS RECEIVED 5-7 INCHES OF SNOW AND 24-30 HOURS OF RIME ICING. HUMIDITY 100 PERCENT AND WET SNOW FALLING WITH SNOW LEVEL NEAR 5000 FEET AT THE TIME. 0.5 TO 0.75 NEW PRECIPITATION PAST |
| Dec 30, 7:35 AM PST | SNOW 11.5 | 1 W Wrightwood, CA | SPOTTER REPORT AT 6275 FEET. STILL SNOWING. |
| Dec 30, 8:00 AM PST | SNOW 14 | 4 Ne Mt Baldy, CA | END OF BALDY ROAD REPORTED 14 INCHES NEW SNOW. 2.3 INCHES SNOW WATER EQUIVALENT. ELEVATION OF REPORT IS 6400 FEET MSL. STILL SNOWING. |
| Dec 30, 8:09 AM PST | SNOW 7 | 1 Wnw Running Springs, CA | TREE BLOCKING OAK GLEN DRIVE AND WILD OAK DRIVE SO CAN NOT PLOW ROAD. TREE FELL ON WIRES AND WIRES HANGING LOW. 6 TO 7 INCHES OF SNOW OVERNIGHT AND 1 INCH SNOW WATER EQUIVALENT. HEAVY SNOW LOADING DUE TO 36 HOURS OF RIME ICING AND PRIOR 7 INCHES OF SNOWFALL FR |
| Dec 30, 8:28 AM PST | SNOW 5 | 1 Nw Lake Arrowhead, CA | PIONEER ROAD, POWERLINE DOWN. 5 INCHES OF SNOW OVERNIGHT AND 1 INCH SNOW WATER EQUIVALENT. HEAVY SNOW LOADING DUE TO 36 HOURS OF RIME ICING AND PRIOR 5 INCHES OF SNOWFALL FROM MONDAY NIGHT. MANY TREES DOWNED OR HANGING LOW. TEMPERATURES ARE 33F AT 5700 FEET. |
| Dec 30, 8:49 AM PST | SNOW 6 | Running Springs, CA | RIM OF THE WORLD DRIVE AT HIGHWAY 330 POWER POLE DOWN ALONG WITH LINES. 6 INCHES NEW SNOW OVERNIGHT AND 1 INCH WATER (HEAVY SNOW) ADDED TO 36 HOURS OF RIME ICING AND SIMILAR SNOWFALL FROM MONDAY NIGHT. TREES FALLING ON ROADS AND POWERLINES IN RUNNING SPRINGS. |
| Dec 30, 9:24 AM PST | SNOW 5 | 2 W Lake Arrowhead, CA | WALNUT HILLS DRIVE AND SPYGLASS DRIVE. POWERLINES DOWN ON ROAD AND VEHICLES DRIVING ON THEM. TREE FELL ON WIRES. 6 INCHES OF SNOW OVERNIGHT AND 1 INCH SNOW WATER EQUIVALENT. HEAVY SNOW LOADING DUE TO 36 HOURS OF RIME ICING AND PRIOR 5 INCHES OF SNOWFALL FROM M |
| Dec 30, 9:27 AM PST | SNOW 6 | 1 Nw Running Springs, CA | NOB HILL DRIVE. TREE FELL ON WIRES AND WIRES HANGING LOW. 6 INCHES OF SNOW OVERNIGHT AND 1 INCH SNOW WATER EQUIVALENT. HEAVY SNOW LOADING DUE TO 36 HOURS OF RIME ICING AND PRIOR 7 INCHES OF SNOWFALL FROM MONDAY NIGHT. MANY TREES DOWNED OR HANGING LOW. TEMPERAT |
| Dec 30, 9:44 AM PST | SNOW 5 | 2 Wsw Lake Arrowhead, CA | UPDATE FROM PRIOR LSR. BLUE JAY AREA REMAINS CUT OFF AT HIGHWAY 189 FROM ACCESS DUE TO TREES AND POWERLINES DOWN. SCE SOCAL EDISON IN AREA BUT NO ETA TO RESTORE POWERLINES. THIS AFFECTS NOAA WEATHER RADIO TRANSMITTER LIKELY. MUTUAL AID BEING REQUESTED IN THIS |
| Dec 30, 10:47 AM PST | SNOW 10 | Wrightwood, CA | 10 INCHES NEW SNOW OVERNIGHT. ELEVATION 5900 FEET. STILL SNOWING. 8 WEATHER STATIONS REPORT CURRENT TEMPERATURE 32-33F. |
| Dec 30, 12:07 PM PST | SNOW 15 | 1 Nne Mt Baldy, CA | MT BALDY ROAD CLOSED AT ICE HOUSE CANYON. 34F AT 5000 FEET. PRECIPITATION CONTINUES IN THIS AREA WITH SNOW LEVEL 5000-5500 FEET. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 9.4 hours before the alert went out and 145 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 28 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 646 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
274 WWUS46 KSGX 282126 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 126 PM PST Tue Dec 28 2021 CAZ055-056-058-290615- /O.UPG.KSGX.WS.A.0007.211229T0900Z-211231T1200Z/ /O.NEW.KSGX.WS.W.0008.211229T0900Z-211231T1200Z/ San Bernardino County Mountains-Riverside County Mountains- San Diego County Mountains- Including the cities of Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood, and Idyllwild-Pine Cove 126 PM PST Tue Dec 28 2021 ...WINTER STORM WARNING IN EFFECT FROM 1 AM WEDNESDAY TO 4 AM PST FRIDAY... * WHAT...Heavy snow expected. Travel will be very difficult to impossible. Total snow accumulations of 6 to 12 inches, with localized amounts up to 56 inches above 8000 feet possible. Areas of southwest winds 25 to 35 mph with local gusts to 55 mph in the San Bernardino Mountains. * WHERE...Above 5,000 feet in the San Bernardino County Mountains, Riverside County Mountains and San Diego County Mountains. * WHEN...1 AM Wednesday to 4 AM Friday. * ADDITIONAL DETAILS...Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are expected. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ CO
7 follow-up statements
502 WWUS46 KSGX 290529 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 929 PM PST Tue Dec 28 2021 CAZ055-056-058-291400- /O.CON.KSGX.WS.W.0008.211229T0900Z-211231T1200Z/ San Bernardino County Mountains-Riverside County Mountains- San Diego County Mountains- Including the cities of Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood, and Idyllwild-Pine Cove 929 PM PST Tue Dec 28 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 1 AM WEDNESDAY TO 4 AM PST FRIDAY... * WHAT...Heavy snow expected. Travel will be very difficult to impossible. Total snow accumulations of 6 to 12 inches between 5000-6000 ft and 12-24 inches between 6000-7000 ft. Localized amounts of 3-4 ft or more above 8000 feet possible in the San Bernardino Mountains. For the San Diego County Mountains, snow accumulations of 1-2 inches. Southwest winds 20-30 mph with gusts 35-50 mph. * WHERE...Above 5,000 feet in the San Bernardino County Mountains, Riverside County Mountains and San Diego County Mountains. * WHEN...1 AM Wednesday to 4 AM Friday. * ADDITIONAL DETAILS...Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are expected. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ SS
097 WWUS46 KSGX 291147 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 347 AM PST Wed Dec 29 2021 CAZ058-300000- /O.CAN.KSGX.WS.W.0008.000000T0000Z-211231T1200Z/ /O.NEW.KSGX.WW.Y.0011.211229T1147Z-211230T0000Z/ San Diego County Mountains- 347 AM PST Wed Dec 29 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 PM PST THIS AFTERNOON ABOVE 5000 FEET... ...WINTER STORM WARNING IS CANCELLED... * WHAT...Wet snow occurring. Plan on slippery road conditions. Tree branches could fall as well. Wet snow accumulations of 2 to 4 inches are expected. * WHERE...San Diego County Mountains above 5000 feet. * WHEN...Until 4 PM today. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. Snow levels will rise for this afternoon and tonight with most of the precipitation in the form of rain after this afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for wet snow means periods of wet snow will cause primarily travel difficulties. Be prepared for snow covered roads and limited visibilities, and use caution while driving. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ CAZ055-056-300015- /O.CON.KSGX.WS.W.0008.000000T0000Z-211231T1200Z/ San Bernardino County Mountains-Riverside County Mountains- Including the cities of Big Bear City, Big Bear Lake, Running Springs, and Wrightwood 347 AM PST Wed Dec 29 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST FRIDAY ABOVE 6000 FEET... * WHAT...Heavy snow occurring. Travel will be very difficult to impossible. Tree branches could fall as well. Snow accumulations of 12 to 24 inches above 6000 to 6500 feet and 2 to 4 feet above 7500 feet, are expected. * WHERE...San Bernardino County Mountains and Riverside County Mountains above 5000 feet today, above 5500 feet this evening, and above 6000 feet after this evening. * WHEN...Until 4 AM Friday. * ADDITIONAL DETAILS...Be prepared for significant reductions in visibility at times. Snow level around 4000 feet rising to 5000 feet in the evening and 5500 to 6000 feet late tonight. The most widespread and heaviest snowfall is expected for tonight into early Thursday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are occurring. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ 17
424 WWUS46 KSGX 292123 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 123 PM PST Wed Dec 29 2021 CAZ055-056-300630- /O.CON.KSGX.WS.W.0008.000000T0000Z-211231T1200Z/ San Bernardino County Mountains-Riverside County Mountains- Including the cities of Big Bear City, Big Bear Lake, Running Springs, and Wrightwood 123 PM PST Wed Dec 29 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST FRIDAY ABOVE 6000 FEET... * WHAT...Heavy snow occurring. Travel will be very difficult to impossible. Tree branches could fall as well. Snow accumulations of 12 to 24 inches above 6000 to 6500 feet and 2 to 4 feet above 7500 feet, are expected. * WHERE...San Bernardino County Mountains and Riverside County Mountains above 5000 feet today, above 5500 feet overnight, and above 6000 feet Thursday morning * WHEN...Until 4 AM Friday. * ADDITIONAL DETAILS...Be prepared for significant reductions in visibility at times. Snow level around 4500 to 5000 feet, rising to 5500 tonight, and 6000 feet Thursday morning. The most widespread and heaviest snowfall is expected for tonight into Thursday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are occurring. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ CAZ058-300630- /O.EXT.KSGX.WW.Y.0011.000000T0000Z-211230T1700Z/ San Diego County Mountains- 123 PM PST Wed Dec 29 2021 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 9 AM PST THURSDAY ABOVE 5000 FEET... * WHAT...Snow occurring. Plan on slippery road conditions, including during the evening commute tonight and morning commute Thursday. Additional snow accumulations of two to four inches are expected. * WHERE...San Diego County Mountains above 5000 feet. * WHEN...Until 9 AM Thursday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Be prepared for snow covered roads and limited visibilities, and use caution while driving. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ CO
606 WWUS46 KSGX 300603 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 1003 PM PST Wed Dec 29 2021 CAZ055-056-301400- /O.CON.KSGX.WS.W.0008.000000T0000Z-211231T1200Z/ San Bernardino County Mountains-Riverside County Mountains- Including the cities of Big Bear City, Big Bear Lake, Running Springs, and Wrightwood 1003 PM PST Wed Dec 29 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM FRIDAY ABOVE 6000 FEET... * WHAT...Heavy snow occurring. Travel will be very difficult to impossible. Snow accumulations of 12 to 24 inches above 6000 to 6500 feet and 2 to 4 feet above 7500 feet. * WHERE...San Bernardino County Mountains and Riverside County Mountains above 5000 feet today, above 5500 feet overnight, and above 6000 feet Thursday morning * WHEN...Until 4 AM Friday. * ADDITIONAL DETAILS...Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are occurring. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ CAZ058-301400- /O.CON.KSGX.WW.Y.0011.000000T0000Z-211230T1700Z/ San Diego County Mountains- 1003 PM PST Wed Dec 29 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM THURSDAY ABOVE 5000 FEET... * WHAT...Snow occurring. Plan on slippery road conditions, including during the evening commute tonight and morning commute Thursday. Additional snow accumulations of two to four inches are expected. * WHERE...San Diego County Mountains above 5000 feet. * WHEN...Until 9 AM Thursday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for blowing snow means that visibilities will be limited due to strong winds blowing snow around. Use caution when traveling, especially in open areas. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ Moede
763 WWUS46 KSGX 301050 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 250 AM PST Thu Dec 30 2021 CAZ056-302300- /O.CAN.KSGX.WS.W.0008.000000T0000Z-211231T1200Z/ /O.NEW.KSGX.WW.Y.0012.211230T1050Z-211231T0400Z/ Riverside County Mountains- 250 AM PST Thu Dec 30 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 8 PM PST THIS EVENING ABOVE 6000 FEET... ...WINTER STORM WARNING IS CANCELLED... * WHAT...Snow occurring. Plan on slippery road conditions. Additional snow accumulations of 1 to 3 inches are expected. * WHERE...Riverside County Mountains above 6000 feet with the greater totals above 7500 feet. * WHEN...Until 8 PM today. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Be prepared for snow covered roads and limited visibilities, and use caution while driving. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ CAZ058-301200- /O.CAN.KSGX.WW.Y.0011.000000T0000Z-211230T1700Z/ San Diego County Mountains- 250 AM PST Thu Dec 30 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Most precipitation will remain to the west early this morning. Once precipitation does return, snow levels will have risen to 5000 to 5500 feet with any snow limited to the highest peaks. $$ CAZ055-302300- /O.EXT.KSGX.WS.W.0008.000000T0000Z-211231T0400Z/ San Bernardino County Mountains- Including the cities of Big Bear City, Big Bear Lake, Running Springs, and Wrightwood 250 AM PST Thu Dec 30 2021 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 8 PM PST THIS EVENING ABOVE 5500 FEET... * WHAT...Heavy snow occurring. Plan on difficult travel conditions, including during the morning commute. Additional snow accumulations of 4 to 8 inches, with localized amounts up to 20 inches, are expected. * WHERE...San Bernardino County Mountains above 5500 feet. Snow levels will rise from 4500 to 5000 feet early this morning to 5500 feet in the afternoon. The heaviest snowfall is expected west of the Cajon Pass and above 5500 feet with amounts decreasing toward the east. * WHEN...Until 8 PM today. * ADDITIONAL DETAILS...Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are occurring. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ 17
760 WWUS46 KSGX 301932 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 1132 AM PST Thu Dec 30 2021 |. CAZ056-302045- /O.CAN.KSGX.WW.Y.0012.000000T0000Z-211231T0400Z/ Riverside County Mountains- 1132 AM PST Thu Dec 30 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Only periods of light snow showers are expected through tonight. $$ CAZ055-310400- /O.CON.KSGX.WS.W.0008.000000T0000Z-211231T0400Z/ San Bernardino County Mountains- Including the cities of Big Bear City, Big Bear Lake, Running Springs, and Wrightwood 1132 AM PST Thu Dec 30 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 PM PST THIS EVENING ABOVE 5500 FEET... * WHAT...Heavy snow occurring. Plan on difficult travel conditions, including during the evening commute. Additional snow accumulations of 2 to 4 inches are expected. * WHERE...San Bernardino County Mountains above 5500 feet. The heaviest snowfall is expected west of the Cajon Pass and above 5500 feet with amounts decreasing toward the east. * WHEN...Until 8 PM today. * ADDITIONAL DETAILS...Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are occurring. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$
271 WWUS46 KSGX 310350 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 750 PM PST Thu Dec 30 2021 CAZ055-310500- /O.EXP.KSGX.WS.W.0008.000000T0000Z-211231T0400Z/ San Bernardino County Mountains- Including the cities of Big Bear City, Big Bear Lake, Running Springs, and Wrightwood 750 PM PST Thu Dec 30 2021 ...WINTER STORM WARNING WILL EXPIRE AT 8 PM THIS EVENING ABOVE 5500 FEET... The heavy snow has ended. The warning will expire at 8 PM. $$ Moede
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 27, 7:39 PM PST | Wind Advisory | SGX | Riverside, San Bernardino, San Diego | 7 hr |
| Dec 27, 8:03 PM PST | Small Craft Advisory | SGX | 13 hr | |
| Dec 28, 3:00 AM PST | Winter Storm Watch | SGX | Riverside, San Bernardino, San Diego | 10 hr |
| Dec 28, 11:07 AM PST | Flood Watch | SGX | Orange, Riverside, San Bernardino, San Diego | 48 hr |
Nearby
Winter Storm Warnings in California, 2021Every winter storm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.