Alert archive / California / High Wind Watches in 2021
High Wind Watch 6, NWS San Diego, CA
NWS San Diego, CA issued this high wind watch at Apr 4, 2021, 1:43 AM PDT for Riverside County, San Bernardino County, San Diego County, California. It took effect at Apr 5, 2021, 2:00 AM PDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Apr 4, 2021, 1:43 AM PDT (08:43 UTC)
- In effect from
- Apr 5, 2021, 2:00 AM PDT
- Expired
- Apr 4, 2021, 1:28 PM PDT
- In force
- 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 08:43 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.
The nearest sounding before it
San Diego, CA (KNKX), launched 00:00Z, 8.7 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
- 3042 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
897 WWUS76 KSGX 040843 NPWSGX URGENT - WEATHER MESSAGE National Weather Service SAN DIEGO CA 143 AM PDT Sun Apr 4 2021 CAZ055-056-058-065-042100- /O.NEW.KSGX.HW.A.0006.210405T0900Z-210406T1200Z/ San Bernardino County Mountains-Riverside County Mountains- San Diego County Mountains-San Gorgonio Pass Near Banning- Including the cities of Big Bear City, Big Bear Lake, Idyllwild-Pine Cove, Julian, Pine Valley, and Desert Hot Springs 143 AM PDT Sun Apr 4 2021 ...HIGH WIND WATCH IN EFFECT FROM LATE TONIGHT THROUGH LATE MONDAY NIGHT... * WHAT...West winds 30 to 50 mph with gusts 65 to 75 mph possible. * WHERE...Higher elevations and desert slopes of the San Bernardino County Mountains, Riverside County Mountains, San Diego County Mountains and San Gorgonio Pass. * WHEN...From late tonight through late Monday night. Strongest winds expected on Monday afternoon and evening. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...Gusty westerly winds will reach the desert floor at times where Advisories may be needed. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ For more information from the National Weather Service visit http://weather.gov/sandiego
3 follow-up statements
478 WWUS76 KSGX 041100 NPWSGX URGENT - WEATHER MESSAGE National Weather Service SAN DIEGO CA 400 AM PDT Sun Apr 4 2021 CAZ043-041500- /O.NEW.KSGX.FG.Y.0003.210404T1100Z-210404T1500Z/ San Diego County Coastal Areas- Including the cities of Vista, Carlsbad, Encinitas, Chula Vista, National City, and San Diego 400 AM PDT Sun Apr 4 2021 ...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM PDT THIS MORNING... * WHAT...Visibility less than one-quarter mile in dense fog. * WHERE...San Diego County Coastal Areas. * WHEN...Until 8 AM PDT this morning. * IMPACTS...Hazardous driving conditions due to low visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ CAZ055-056-058-065-041900- /O.CON.KSGX.HW.A.0006.210405T0900Z-210406T1200Z/ San Bernardino County Mountains-Riverside County Mountains- San Diego County Mountains-San Gorgonio Pass Near Banning- Including the cities of Big Bear City, Big Bear Lake, Idyllwild-Pine Cove, Julian, Pine Valley, and Desert Hot Springs 400 AM PDT Sun Apr 4 2021 ...HIGH WIND WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH LATE MONDAY NIGHT... * WHAT...West winds 30 to 50 mph with gusts 65 to 75 mph possible. * WHERE...Higher elevations and desert slopes of the San Bernardino County Mountains, Riverside County Mountains, San Diego County Mountains and San Gorgonio Pass. * WHEN...From late tonight through late Monday night. Strongest winds expected on Monday afternoon and evening. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...Gusty westerly winds will reach the desert floor at times where Advisories may be needed. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ For more information from the National Weather Service visit http://weather.gov/sandiego
140 WWUS76 KSGX 041533 NPWSGX URGENT - WEATHER MESSAGE National Weather Service SAN DIEGO CA 833 AM PDT Sun Apr 4 2021 CAZ043-041800- /O.NEW.KSGX.FG.Y.0004.210404T1533Z-210404T1800Z/ San Diego County Coastal Areas- Including the cities of Vista, Carlsbad, Encinitas, Chula Vista, National City, and San Diego 833 AM PDT Sun Apr 4 2021 ...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM PDT THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...San Diego County Coastal Areas. * WHEN...Until 11 AM PDT this morning. * IMPACTS...Hazardous driving conditions due to low visibility. * ADDITIONAL DETAILS...fog should burn off the coast by the middle of the day. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ CAZ055-056-058-065-042345- /O.CON.KSGX.HW.A.0006.210405T0900Z-210406T1200Z/ San Bernardino County Mountains-Riverside County Mountains- San Diego County Mountains-San Gorgonio Pass Near Banning- Including the cities of Big Bear City, Big Bear Lake, Idyllwild-Pine Cove, Julian, Pine Valley, and Desert Hot Springs 833 AM PDT Sun Apr 4 2021 ...HIGH WIND WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH LATE MONDAY NIGHT... * WHAT...West winds 30 to 50 mph with gusts to 75 mph possible. * WHERE...Higher elevations and desert slopes of the San Bernardino County Mountains, Riverside County Mountains, San Diego County Mountains and San Gorgonio Pass. * WHEN...From late tonight through late Monday night. Strongest winds expected on Monday afternoon and evening. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...Gusty westerly winds will reach the desert floor at times where Advisories may be needed. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ jmb For more information from the National Weather Service visit http://weather.gov/sandiego
911 WWUS76 KSGX 042028 NPWSGX URGENT - WEATHER MESSAGE National Weather Service SAN DIEGO CA 128 PM PDT Sun Apr 4 2021 CAZ055-056-058-065-050500- /O.UPG.KSGX.HW.A.0006.210405T0900Z-210406T1200Z/ /O.NEW.KSGX.WI.Y.0022.210405T0600Z-210406T1200Z/ San Bernardino County Mountains-Riverside County Mountains- San Diego County Mountains-San Gorgonio Pass Near Banning- Including the cities of Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, Wrightwood, Idyllwild-Pine Cove, Julian, Pine Valley, Banning, and Desert Hot Springs 128 PM PDT Sun Apr 4 2021 ...WIND ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 5 AM PDT TUESDAY... * WHAT...West winds 25 to 35 mph with gusts to 55 mph expected. Isolated gusts to 70 mph in the passes and along the desert- facing slopes. * WHERE...San Bernardino County Mountains, Riverside County Mountains, San Diego County Mountains and San Gorgonio Pass Near Banning. * WHEN...From 11 PM this evening to 5 AM PDT Tuesday. * IMPACTS...Gusty winds could blow around unsecured objects and make travel difficult for high-profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ CAZ060>062-050500- /O.NEW.KSGX.WI.Y.0022.210405T0600Z-210406T1200Z/ Apple and Lucerne Valleys-Coachella Valley- San Diego County Deserts- Including the cities of Victorville, Hesperia, Apple Valley, Indio, Palm Springs, Cathedral City, Palm Desert, Palm Desert Country, La Quinta, Coachella, and Borrego Springs 128 PM PDT Sun Apr 4 2021 ...WIND ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 5 AM PDT TUESDAY... * WHAT...West winds 20 to 30 mph with gusts to 50 mph expected. * WHERE...Apple and Lucerne Valleys, Coachella Valley and San Diego County Deserts. * WHEN...From 11 PM this evening to 5 AM PDT Tuesday. * IMPACTS...Gusty winds could blow around unsecured objects and make travel difficult for high-profile vehicles. Blowing sand and dust could severely restrict visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ jmb For more information from the National Weather Service visit http://weather.gov/sandiego
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 4:00 AM PDT | Dense Fog Advisory | SGX | San Diego | 4 hr |
| Apr 4, 8:33 AM PDT | Dense Fog Advisory | SGX | San Diego | 2 hr |
| Apr 4, 1:28 PM PDT | Wind Advisory | SGX | Riverside, San Bernardino, San Diego | 40 hr |
Nearby
High Wind Watches in California, 2021Every high wind watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.