Alert archive / California / Winter Storm Warnings in 2021
Winter Storm Warning 3, NWS San Diego, CA
NWS San Diego, CA issued this winter storm warning at Mar 8, 2021, 5:45 PM PST for Riverside County, San Bernardino County, San Diego County, California. It took effect at Mar 9, 2021, 10:00 PM PST. It was in force for 3 days. 6 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
- Mar 8, 2021, 5:45 PM PST (01:45 UTC)
- In effect from
- Mar 9, 2021, 10:00 PM PST
- Expired
- Mar 12, 2021, 10:00 PM PST
- In force
- 3 days
- 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 01:44 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 |
|---|---|---|---|
| Mar 10, 4:00 AM PST | HEAVY SNOW 1 | 4 Nne Lytle Creek, CA | HEAVY SNOW REPORTED AT THIS TIME IN CAJON PASS AT I-15 AND HIGHWAY 138 AT 3200 FEET ELEVATION. |
| Mar 10, 6:42 AM PST | SNOW 4 | 1 W Wrightwood, CA | 4 INCHES SNOW AT 6300 FEET. 27F. |
| Mar 10, 11:32 PM PST | SNOW 9 | Wrightwood, CA | STORM TOTAL SNOWFALL 9-10 MARCH. 9 INCHES SNOW DEPTH. |
| Mar 11, 5:24 AM PST | SNOW 8 | 2 Sw Big Bear City, CA | TOTAL SNOW. |
| Mar 11, 6:38 AM PST | SNOW 11 | 1 W Wrightwood, CA | STORM TOTAL. |
| Mar 12, 4:23 PM PST | HEAVY SNOW 6 | Palomar Mountain, CA | UPDATE TO THUNDERSNOW AT 5700 FEET BIRCH HILL. 6 INCHES OF SNOW MEASURED FROM NOON TO 3 PM. TEMPERATURES WERE 27 TO 29F. AT LEAST 4 INCHES SNOW PELLET GRAUPEL AND 2 DENDRITIC FLAKES. SNOW LEVEL WAS 3500 FEET. STORM TOTAL NOW 22 INCHES MUCH OF WHICH WAS SNOW GR |
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 00:00Z, 1.8 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 819 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
449 WWUS46 KSGX 090145 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 545 PM PST Mon Mar 8 2021 ...HEAVY SNOW TO IMPACT MOUNTAINS WEDNESDAY AND THURSDAY... .A cold winter storm will bring periods of heavy snow to the mountains, heaviest on Wednesday. Significant travel impacts are expected, including for major mountain passes such as I-15/Cajon Pass and I-8 through Laguna Summit as a result of low snow levels. There is potential for snow to continue into Friday, particularly for the San Bernardino Mountains. CAZ055-056-058-091400- /O.UPG.KSGX.WS.A.0003.210310T0400Z-210312T0600Z/ /O.NEW.KSGX.WS.W.0003.210310T0600Z-210312T0600Z/ San Bernardino County Mountains-Riverside County Mountains- San Diego County Mountains- Including the cities of Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood, Idyllwild-Pine Cove, Julian, and Pine Valley 545 PM PST Mon Mar 8 2021 ...WINTER STORM WARNING IN EFFECT FROM 10 PM TUESDAY TO 10 PM PST THURSDAY... * WHAT...Heavy snow expected. For the San Bernardino and Riverside County Mountains, total snow accumulations 2 to 5 inches between 3000 and 4000 feet, 6 to 12 inches between 4000 and 5000 feet, 12 to 18 inches between 5000 and 6000 feet, and local amounts to 24 inches above 6000 feet. For the San Diego County Mountains, total snow accumulations up to 5 inches between 3500 and 4500 feet, 6 to 12 inches between 4500 and 5500 feet, and 12 to 18 inches above 5500 feet. * WHERE...Above 3000 to 3500 feet in the San Bernardino and Riverside County Mountains, and above 3500 to 4000 feet in the San Diego County Mountains. * WHEN...10 PM Tuesday to 10 PM Thursday. Heaviest snow expected on Wednesday. Snow may continue into Friday in the San Bernardino Mountains, with a few inches of additional accumulation possible. * ADDITIONAL DETAILS...Significant travel impacts are possible for major mountain passes, including Cajon Pass and I-8. Areas of dense fog will significantly reduce visibility at times, making travel more hazardous. Locally strong west winds with gusts 35 to 50 mph may impact some mountain areas. The combination of heavy snow and gusty winds may result in some downed tree limbs and power outages. 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. $$ Rodriguez
13 follow-up statements
948 WWUS46 KSGX 091106 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 306 AM PST Tue Mar 9 2021 CAZ055-056-058-092330- /O.CON.KSGX.WS.W.0003.210310T0600Z-210312T0600Z/ San Bernardino County Mountains-Riverside County Mountains- San Diego County Mountains- Including the cities of Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood, Idyllwild-Pine Cove, Julian, and Pine Valley 306 AM PST Tue Mar 9 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO 10 PM PST THURSDAY... * WHAT...Heavy snow expected. For the San Bernardino and Riverside County Mountains, total snow accumulations 2 to 5 inches between 3000 and 4000 feet, 6 to 12 inches between 4000 and 5000 feet, 12 to 18 inches between 5000 and 6000 feet, and local amounts to 24 inches above 6000 feet. For the San Diego County Mountains, total snow accumulations up to 5 inches between 3500 and 4500 feet, 6 to 12 inches between 4500 and 5500 feet, and 12 to 18 inches above 5500 feet. * WHERE...Above 3000 to 3500 feet in the San Bernardino and Riverside County Mountains, and above 3500 to 4000 feet in the San Diego County Mountains. * WHEN...10 PM today to 10 PM Thursday. Heaviest snow expected on Wednesday. * ADDITIONAL DETAILS...Significant travel impacts are possible for major mountain passes, including Cajon Pass and I-8. Areas of dense fog will significantly reduce visibility at times, making travel more hazardous. Locally strong west winds with gusts 35 to 50 mph may impact some mountain areas. The combination of heavy snow and gusty winds may result in some downed tree limbs and power outages. 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. $$ 17
693 WWUS46 KSGX 092146 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 146 PM PST Tue Mar 9 2021 CAZ055-056-058-101200- /O.CON.KSGX.WS.W.0003.210310T0600Z-210312T0600Z/ San Bernardino County Mountains-Riverside County Mountains- San Diego County Mountains- Including the cities of Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood, Idyllwild-Pine Cove, Julian, and Pine Valley 146 PM PST Tue Mar 9 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO 10 PM PST THURSDAY... * WHAT...Heavy snow expected. For the San Bernardino and Riverside County Mountains, total snow accumulations 2 to 5 inches between 3000 and 4000 feet, 5 to 10 inches between 4000 and 5000 feet, 10 to 20 inches between 5000 and 6500 feet, and local amounts to 24 inches above 6500 feet. For the San Diego County Mountains, total snow accumulations of 3 to 8 inches between 3500 and 4500 feet, 8 to 12 inches between 4500 and 5500 feet, and 12 to 24 inches above 5500 feet. Plan on difficult travel conditions through the period. * WHERE...Above 3000 to 3500 feet in the San Bernardino and Riverside County Mountains, and above 3500 to 4000 feet in the San Diego County Mountains. * WHEN...10 PM today to 10 PM Thursday. * ADDITIONAL DETAILS...Significant travel impacts are possible for major mountain passes, including Cajon Pass and I-8. Areas of dense fog will significantly reduce visibility at times, making travel more hazardous. Locally strong west winds with gusts 35 to 50 mph may impact some mountain areas. The combination of heavy snow and gusty winds may result in downed tree limbs and power outages. 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. $$
567 WWUS46 KSGX 100539 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 939 PM PST Tue Mar 9 2021 ...HEAVY SNOW THROUGH FRIDAY FOR MOUNTAINS... .Periods of heavy snow through Friday will result in significant accumulations across all mountains areas, with travel impacts expected to major mountain passes including Cajon Pass and I-8 through Laguna Summit. The highest snow totals are expected for the higher elevation communities near the rim of the San Bernardino Mountains, including Running Springs and Arrowbear. CAZ055-056-058-101400- /O.CON.KSGX.WS.W.0003.210310T0600Z-210312T0600Z/ San Bernardino County Mountains-Riverside County Mountains- San Diego County Mountains- Including the cities of Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood, Idyllwild-Pine Cove, Julian, and Pine Valley 939 PM PST Tue Mar 9 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 PM PST THURSDAY... * WHAT...Heavy snow expected. For the San Bernardino and Riverside County Mountains, total snow accumulations 2 to 5 inches between 3000 and 4000 feet, 6 to 12 inches between 4000 and 5000 feet, and 12 to 20 inches above 5000 feet. Local amounts of 24 to 28 inches possible for favored locations, primarily above 6000 feet. For the San Diego County Mountains, total snow accumulations of 3 to 7 inches between 3500 and 4500 feet, 6 to 12 inches between 4500 and 5500 feet, and 12 to 24 inches above 5500 feet. Plan on difficult travel conditions through the period. * WHERE...Above 3000 to 3500 feet in the San Bernardino and Riverside County Mountains, and above 3500 to 4000 feet in the San Diego County Mountains. * WHEN...10 PM today to 10 PM Thursday. There is potential snow to continue into Friday, so monitor the forecast for possible future updates to the Winter Storm Warning. * ADDITIONAL DETAILS...Significant travel impacts are likely for major mountain passes, including Cajon Pass and I-8. Areas of dense fog will significantly reduce visibility at times, making travel more hazardous. Locally strong west winds with gusts 35 to 50 mph may impact some mountain areas. The combination of heavy snow and gusty winds may result in downed tree limbs and power outages. 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. $$ Rodriguez
830 WWUS46 KSGX 101221 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 421 AM PST Wed Mar 10 2021 CAZ055-056-058-102330- /O.CON.KSGX.WS.W.0003.000000T0000Z-210312T0600Z/ San Bernardino County Mountains-Riverside County Mountains- San Diego County Mountains- Including the cities of Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood, Idyllwild-Pine Cove, Julian, and Pine Valley 421 AM PST Wed Mar 10 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 PM PST THURSDAY... * WHAT...Heavy snow occurring. Total snowfall up to 6 inches below 4400 feet, 6 to 10 inches from 4000 to 5000 feet, 10 to 16 inches from 5000 to 6000 feet, with isolated snowfall to two feet on the higher peaks. * WHERE...Above 3000 to 3500 feet in the San Bernardino and Riverside County Mountains, and above 3500 to 4000 feet in the San Diego County Mountains. * WHEN...Until 10 PM Thursday. * ADDITIONAL DETAILS...Significant travel impacts are possible for major mountain passes, including Cajon Pass and I-8. Areas of dense fog will significantly reduce visibility at times, making travel more hazardous. Locally strong west winds with gusts 35 to 50 mph may impact some mountain areas. The combination of heavy snow and gusty winds may result in downed tree limbs and power outages. 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. $$
244 WWUS46 KSGX 102222 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 222 PM PST Wed Mar 10 2021 CAZ055-056-058-110630- /O.CON.KSGX.WS.W.0003.000000T0000Z-210312T0600Z/ San Bernardino County Mountains-Riverside County Mountains- San Diego County Mountains- Including the cities of Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood, Idyllwild-Pine Cove, Julian, and Pine Valley 222 PM PST Wed Mar 10 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 PM PST THURSDAY... * WHAT...Heavy snow occurring. Plan on difficult travel conditions, including during the evening commute. Tree branches could fall as well. Additional snow accumulations from this evening through Thursday evening of 1 to 3 inches from 3000 to 4000 feet, 3 to 8 inches from 4000 to 5000 feet, and localized amounts of 8 to 15 inches above 5000 feet, are expected. * WHERE...All of the mountain areas in San Bernardino, Riverside and San Diego Counties, and the snow levels will be fluctuating between 3000 to 4000 feet. * WHEN...Until 10 PM Thursday. * ADDITIONAL DETAILS...Significant travel impacts are likely along the major mountain passes, including Cajon Pass and I-8. Areas of dense fog will significantly reduce visibility at times, making travel more hazardous. Locally strong west winds with gusts 35 to 50 mph may impact some mountain areas. The combination of heavy snow and gusty winds may result in downed tree limbs and power outages. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are occurring. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ CAZ048-057-065-110630- /O.NEW.KSGX.WW.Y.0006.210311T0600Z-210311T1800Z/ San Bernardino and Riverside County Valleys-The Inland Empire- Santa Ana Mountains and Foothills-San Gorgonio Pass Near Banning- Including the city of Banning 222 PM PST Wed Mar 10 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 10 AM PST THURSDAY ABOVE 2500 FEET... * WHAT...Snow expected. Plan on slippery road conditions, including during the morning commute on Thursday. Snow accumulations of 1 to 3 inches, with localized amounts up to 5 inches, are expected. * WHERE...Above 2500 feet in the Santa Ana Mountains along the Ortega Highway, the Inland Empire, the lower Cajon Pass, and the San Gorgonio Pass. * WHEN...10 PM today to 10 AM Thursday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. Snow falling in rare locations at elevations as low as 2000 to 2500 feet tonight through early Thursday morning could cause hazardous traffic impacts along Ortega Highway, and the Cajon and San Gorgonio Passes along Interstates 15 and 10, respectively. Heavy wet snow could also caused downed tree limbs. 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. $$ jmb weather.gov
944 WWUS46 KSGX 110525 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 925 PM PST Wed Mar 10 2021 CAZ055-056-058-111400- /O.CON.KSGX.WS.W.0003.000000T0000Z-210312T0600Z/ San Bernardino County Mountains-Riverside County Mountains- San Diego County Mountains- Including the cities of Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood, Idyllwild-Pine Cove, Julian, and Pine Valley 925 PM PST Wed Mar 10 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 PM PST THURSDAY... * WHAT...Heavy snow occurring. Plan on difficult travel conditions, including during the evening commute. Tree branches could fall as well. Additional snow accumulations from this evening through Thursday evening of 1 to 3 inches from 3000 to 4000 feet, 3 to 8 inches from 4000 to 5000 feet, and localized amounts of 8 to 15 inches above 5000 feet, are expected. * WHERE...All of the mountain areas in San Bernardino, Riverside and San Diego Counties, and the snow levels will be fluctuating between 3000 to 4000 feet. * WHEN...Until 10 PM Thursday. * ADDITIONAL DETAILS...Significant travel impacts are likely along the major mountain passes, including Cajon Pass and I-8. Areas of dense fog will significantly reduce visibility at times, making travel more hazardous. Locally strong west winds with gusts 35 to 50 mph may impact some mountain areas. The combination of heavy snow and gusty winds may result in downed tree limbs and power outages. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are occurring. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ CAZ048-057-065-111400- /O.CON.KSGX.WW.Y.0006.210311T0600Z-210311T1800Z/ San Bernardino and Riverside County Valleys-The Inland Empire- Santa Ana Mountains and Foothills-San Gorgonio Pass Near Banning- Including the city of Banning 925 PM PST Wed Mar 10 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY ABOVE 2500 FEET... * WHAT...Snow expected. Plan on slippery road conditions, including during the morning commute on Thursday. Snow accumulations of 1 to 3 inches are expected. * WHERE...Above 2500 feet in the Santa Ana Mountains along the Ortega Highway, the Inland Empire, the lower Cajon Pass, and the San Gorgonio Pass. * WHEN...10 PM today to 10 AM Thursday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. Snow falling in rare locations at elevations as low as 2000 to 2500 feet tonight through early Thursday morning could cause hazardous traffic impacts along Ortega Highway, and the Cajon and San Gorgonio Passes along Interstates 15 and 10, respectively. Heavy wet snow could also caused downed tree limbs. 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. $$ Gregoria
879 WWUS46 KSGX 111037 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 237 AM PST Thu Mar 11 2021 CAZ055-056-112300- /O.CON.KSGX.WS.W.0003.000000T0000Z-210312T0600Z/ San Bernardino County Mountains-Riverside County Mountains- Including the cities of Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood, and Idyllwild-Pine Cove 237 AM PST Thu Mar 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING... * WHAT...Heavy snow occurring. Plan on difficult travel conditions. Additional snow accumulations of 5 to 9 inches, with localized amounts up to 16 inches, are expected. * WHERE...All of the mountain areas in San Bernardino and Riverside Counties with snow levels around 3500 feet. * WHEN...Until 10 PM today. * ADDITIONAL DETAILS...Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are occurring. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ CAZ058-112300- /O.CON.KSGX.WS.W.0003.000000T0000Z-210312T0600Z/ San Diego County Mountains- Including the cities of Julian and Pine Valley 237 AM PST Thu Mar 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING... * WHAT...Heavy snow occurring. Plan on difficult travel conditions. Additional snow accumulations of 3 to 7 inches, with localized amounts up to 12 inches, are expected. * WHERE...All of the mountain areas in San Diego County with snow levels around 3500 feet. * WHEN...Until 10 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. $$ CAZ057-111800- /O.CON.KSGX.WW.Y.0006.000000T0000Z-210311T1800Z/ Santa Ana Mountains and Foothills- 237 AM PST Thu Mar 11 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING ABOVE 2500 FEET... * WHAT...Snow occurring. Plan on difficult travel conditions. Additional snow accumulations of 1 to 3 inches are expected. * WHERE...Above 2500 feet in the Santa Ana Mountains including the Ortega Highway. * WHEN...Until 10 AM today. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Be prepared for snow covered roads and limited visibilities, and use caution while driving. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ CAZ065-111800- /O.CON.KSGX.WW.Y.0006.000000T0000Z-210311T1800Z/ San Gorgonio Pass Near Banning- Including the city of Banning 237 AM PST Thu Mar 11 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING ABOVE 2500 FEET... * WHAT...Snow occurring. Plan on difficult travel conditions, including during the morning commute. Localized additional snow accumulations of up to two inches are expected. * WHERE...Above 2500 feet including portions of Interstate 10 through the San Gorgonio Pass. * WHEN...Until 10 AM 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. $$ CAZ048-111800- /O.CON.KSGX.WW.Y.0006.000000T0000Z-210311T1800Z/ San Bernardino and Riverside County Valleys-The Inland Empire- 237 AM PST Thu Mar 11 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING ABOVE 2500 FEET... * WHAT...Snow occurring. Plan on difficult travel conditions. Localized additional snow accumulations of up to 2 inches, are expected. * WHERE...Above 2500 feet, mostly near the foothills of the mountains. * WHEN...Until 10 AM today. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Be prepared for snow covered roads and limited visibilities, and use caution while driving. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ 17
787 WWUS46 KSGX 111802 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 1002 AM PST Thu Mar 11 2021 CAZ048-057-065-111915- /O.EXP.KSGX.WW.Y.0006.000000T0000Z-210311T1800Z/ San Bernardino and Riverside County Valleys-The Inland Empire- Santa Ana Mountains and Foothills-San Gorgonio Pass Near Banning- Including the city of Banning 1002 AM PST Thu Mar 11 2021 ...WINTER WEATHER ADVISORY HAS EXPIRED... The low elevation snow has come to an end. $$ CAZ055-056-120600- /O.EXT.KSGX.WS.W.0003.000000T0000Z-210313T1200Z/ San Bernardino County Mountains-Riverside County Mountains- Including the cities of Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood, and Idyllwild-Pine Cove 1002 AM PST Thu Mar 11 2021 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 4 AM PST SATURDAY... * WHAT...Heavy snow occurring. Plan on difficult travel conditions, including during the evening commute. Additional snow accumulations of 4 to 8 inches, with localized amounts up to 12 inches, are expected. * WHERE...All of the mountain areas in San Bernardino and Riverside Counties with snow levels around 3000 feet. * WHEN...Until 4 AM Saturday. * ADDITIONAL DETAILS...Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are occurring. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ CAZ058-120600- /O.EXT.KSGX.WS.W.0003.000000T0000Z-210313T1200Z/ San Diego County Mountains- Including the cities of Julian and Pine Valley 1002 AM PST Thu Mar 11 2021 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 4 AM PST SATURDAY... * WHAT...Heavy snow occurring. Plan on difficult travel conditions, including during the evening commute. Additional snow accumulations of 3 to 6 inches, with localized amounts up to 12 inches, are expected. * WHERE...All of the mountain areas in San Diego County with snow levels around 3000 feet. * WHEN...Until 4 AM Saturday. * 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. $$ jmb
985 WWUS46 KSGX 112206 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 206 PM PST Thu Mar 11 2021 CAZ055-056-120615- /O.CON.KSGX.WS.W.0003.000000T0000Z-210313T1200Z/ San Bernardino County Mountains-Riverside County Mountains- Including the cities of Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood, and Idyllwild-Pine Cove 206 PM PST Thu Mar 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SATURDAY... * WHAT...Heavy snow occurring. Plan on difficult travel conditions, including during the evening commute. Additional snow accumulations of 5 to 10 inches, with localized amounts up to 15 inches, are expected. * WHERE...All of the mountain areas in San Bernardino and Riverside Counties with snow levels around 3000 to 3500 feet. * WHEN...Until 4 AM Saturday. * ADDITIONAL DETAILS...Significant travel impacts are likely along the major mountain passes, including Cajon Pass. Areas of dense fog will significantly reduce visibility at times, making travel more hazardous. The heavy snow may result in downed tree limbs and power outages. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are occurring. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ CAZ058-120615- /O.CON.KSGX.WS.W.0003.000000T0000Z-210313T1200Z/ San Diego County Mountains- Including the cities of Julian and Pine Valley 206 PM PST Thu Mar 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SATURDAY... * WHAT...Heavy snow occurring. Plan on difficult travel conditions, including during the evening commute. Additional snow accumulations of 2 to 4 inches, with localized amounts up to 10 inches, are expected. * WHERE...All of the mountain areas in San Diego County with snow levels around 3000 feet. * WHEN...Until 4 AM Saturday. * ADDITIONAL DETAILS...Significant travel impacts are likely along the major mountain passes, including Interstate 8. Areas of dense fog will significantly reduce visibility at times, making travel more hazardous. The heavy snow may result in downed tree limbs and power outages. 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. $$ CAZ048-057-120615- /O.NEW.KSGX.WW.Y.0007.210312T0600Z-210312T1800Z/ San Bernardino and Riverside County Valleys-The Inland Empire- Santa Ana Mountains and Foothills- 206 PM PST Thu Mar 11 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 10 AM PST FRIDAY... * WHAT...Snow expected. Plan on slippery road conditions, including during the morning commute on Friday. Snow accumulations of 1 to 2 inches are expected. * WHERE...Elevations above 2000 feet in the Santa Ana Mountains and the Foothills of the Inland Empire. * WHEN...10 PM today to 10 AM Friday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times and slick spots on roads. Snow falling in rare locations at elevations as low as 2000 feet tonight through early Friday morning could cause hazardous traffic impacts along Ortega Highway, and the lower Cajon Pass. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for blowing snow means that visibilities will be limited due to strong winds blowing snow around. Use caution when traveling, especially in open areas. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ jmb weather.gov
980 WWUS46 KSGX 120536 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 936 PM PST Thu Mar 11 2021 CAZ055-056-121800- /O.CON.KSGX.WS.W.0003.000000T0000Z-210313T1200Z/ San Bernardino County Mountains-Riverside County Mountains- Including the cities of Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood, and Idyllwild-Pine Cove 936 PM PST Thu Mar 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SATURDAY... * WHAT...Heavy snow occurring. Plan on difficult travel conditions, including during the evening commute. Additional snow accumulations of 3 to 6 inches are expected. * WHERE...All of the mountain areas in San Bernardino and Riverside Counties with snow levels around 3000 to 3500 feet. * WHEN...Until 4 AM Saturday. * ADDITIONAL DETAILS...Significant travel impacts are likely along the major mountain passes, including Cajon Pass. Areas of dense fog will significantly reduce visibility at times, making travel more hazardous. The heavy snow may result in downed tree limbs and power outages. 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. $$ CAZ058-121800- /O.CON.KSGX.WS.W.0003.000000T0000Z-210313T1200Z/ San Diego County Mountains- Including the cities of Julian and Pine Valley 936 PM PST Thu Mar 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST SATURDAY... * WHAT...Heavy snow occurring. Plan on difficult travel conditions, including during the evening commute. Additional snow accumulations of 2 to 4 inches are expected. * WHERE...All of the mountain areas in San Diego County with snow levels around 3000 feet. * WHEN...Until 4 AM Saturday. * ADDITIONAL DETAILS...Significant travel impacts are likely along the major mountain passes, including Interstate 8. Areas of dense fog will significantly reduce visibility at times, making travel more hazardous. The heavy snow may result in downed tree limbs and power outages. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are occurring. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ CAZ048-057-121800- /O.CON.KSGX.WW.Y.0007.210312T0600Z-210312T1800Z/ San Bernardino and Riverside County Valleys-The Inland Empire- Santa Ana Mountains and Foothills- 936 PM PST Thu Mar 11 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST FRIDAY ABOVE 2000 FEET... * WHAT...Snow expected. Plan on slippery road conditions, including during the morning commute on Friday. Snow accumulations of 1 to 2 inches are expected. * WHERE...Elevations above 2000 feet in the Santa Ana Mountains and the Foothills of the Inland Empire. * WHEN...10 PM today to 10 AM Friday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times and slick spots on roads. Snow falling in rare locations at elevations as low as 2000 feet tonight through early Friday morning could cause hazardous traffic impacts along Ortega Highway, and the lower Cajon Pass. 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. $$ Gregoria
614 WWUS46 KSGX 121122 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 322 AM PST Fri Mar 12 2021 CAZ048-057-121230- /O.CAN.KSGX.WW.Y.0007.000000T0000Z-210312T1800Z/ San Bernardino and Riverside County Valleys-The Inland Empire- Santa Ana Mountains and Foothills- 322 AM PST Fri Mar 12 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Little or no precipitation is expected this morning. $$ CAZ055-056-122300- /O.EXT.KSGX.WS.W.0003.000000T0000Z-210313T0600Z/ San Bernardino County Mountains-Riverside County Mountains- Including the cities of Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood, and Idyllwild-Pine Cove 322 AM PST Fri Mar 12 2021 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 10 PM PST THIS EVENING... * WHAT...Heavy snow occurring. Additional snow accumulations of 1 to 3 inches are expected. Locally greater amounts are possible during the late afternoon and evening. * WHERE...All of the mountain areas in San Bernardino and Riverside Counties with snow levels rising to 3500 feet. * WHEN...The most likely time for additional heavier snowfall is during the late afternoon and evening. There may be a few snow showers at times for this morning into this afternoon. 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. $$ CAZ058-122300- /O.EXT.KSGX.WS.W.0003.000000T0000Z-210313T0600Z/ San Diego County Mountains- Including the cities of Julian and Pine Valley 322 AM PST Fri Mar 12 2021 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 10 PM PST THIS EVENING... * WHAT...Heavy snow occurring. Additional snow accumulations of up to two inches are expected. Locally greater amounts are possible during the late afternoon and evening. * WHERE...All of the mountain areas in San Diego County with snow levels around 3000 feet. * WHEN...The most likely time for additional heavier snowfall is during the late afternoon and evening. There may be a few snow showers at times for this morning into this afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are occurring. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ 17
494 WWUS46 KSGX 122134 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 134 PM PST Fri Mar 12 2021 CAZ055-056-130600- /O.CON.KSGX.WS.W.0003.000000T0000Z-210313T0600Z/ San Bernardino County Mountains-Riverside County Mountains- Including the cities of Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood, and Idyllwild-Pine Cove 134 PM PST Fri Mar 12 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING... * WHAT...Heavy snow occurring. Plan on difficult travel conditions, including during the evening commute. Additional snow accumulations of 2 to 4 inches, with localized amounts up to 6 inches, are expected. * WHERE...All of the mountain areas in San Bernardino and Riverside Counties with snow levels around 3500 feet. * WHEN...Until 10 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. $$ CAZ058-130600- /O.CON.KSGX.WS.W.0003.000000T0000Z-210313T0600Z/ San Diego County Mountains- Including the cities of Julian and Pine Valley 134 PM PST Fri Mar 12 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING... * WHAT...Heavy snow occurring. Plan on difficult travel conditions, including during the evening commute. Additional snow accumulations of 2 to 6 inches, are expected. * WHERE...All of the mountain areas in San Diego County with snow levels around 3500 feet. * WHEN...Until 10 PM today. * ADDITIONAL DETAILS...Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are occurring. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California. $$ jmb
925 WWUS46 KSGX 130540 WSWSGX URGENT - WINTER WEATHER MESSAGE National Weather Service SAN DIEGO CA 940 PM PST Fri Mar 12 2021 CAZ055-056-130645- /O.EXP.KSGX.WS.W.0003.000000T0000Z-210313T0600Z/ San Bernardino County Mountains-Riverside County Mountains- Including the cities of Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood, and Idyllwild-Pine Cove 940 PM PST Fri Mar 12 2021 ...WINTER STORM WARNING WILL EXPIRE AT 10 PM PST THIS EVENING... Isolated snow showers will come to an end overnight. Any additional snow accumulation will be light. As such, the Winter Storm Warning will be allowed to expire at 10 PM. $$ CAZ058-130645- /O.EXP.KSGX.WS.W.0003.000000T0000Z-210313T0600Z/ San Diego County Mountains- Including the cities of Julian and Pine Valley 940 PM PST Fri Mar 12 2021 ...WINTER STORM WARNING WILL EXPIRE AT 10 PM PST THIS EVENING... Isolated snow showers will come to an end overnight. Any additional snow accumulation will be light. As such, the Winter Storm Warning will be allowed to expire at 10 PM. $$ Gregoria
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.