Alert archive / California / Wind Advisories in 2021
Wind Advisory 11, NWS Eureka, CA
NWS Eureka, CA issued this wind advisory at May 20, 2021, 3:35 AM PDT for Mendocino County, California. It took effect at May 20, 2021, 12:00 PM PDT. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- May 20, 2021, 3:35 AM PDT (10:35 UTC)
- In effect from
- May 20, 2021, 12:00 PM PDT
- Expired
- May 20, 2021, 2:09 PM PDT
- In force
- 2 hr
- Issued by
- NWS Eureka, CA
County Mendocino County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 139 km from the middle of the area, began a volume at 10:34 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
Oakland, CA (KOAK), launched 00:00Z, 10.6 hours before the alert went out and 218 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
- 1618 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- -7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
165 WWUS76 KEKA 201035 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 335 AM PDT Thu May 20 2021 CAZ113-115-201600- /O.CAN.KEKA.WI.Y.0010.000000T0000Z-210521T0000Z/ /O.NEW.KEKA.WI.Y.0011.210520T1900Z-210521T0000Z/ /O.CON.KEKA.FR.Y.0036.000000T0000Z-210520T1600Z/ Southeastern Mendocino Interior-Southern Lake- 335 AM PDT Thu May 20 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... ...WIND ADVISORY IN EFFECT FROM NOON TODAY TO 5 PM PDT THIS AFTERNOON... * WHAT...For the Frost Advisory, temperatures as low as 35 will result in frost formation. For the Wind Advisory, northwest winds 15 to 25 mph with gusts up to 40 to 45 mph expected. * WHERE...Portions of the Southeastern Mendocino Interior and Southern Lake Counties. * WHEN...For the Frost Advisory, until 9 AM PDT this morning. For the Wind Advisory, from noon today to 5 PM PDT this afternoon. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ110-114-201600- /O.CAN.KEKA.WI.Y.0010.000000T0000Z-210521T0000Z/ /O.CON.KEKA.FR.Y.0036.000000T0000Z-210520T1600Z/ Northwestern Mendocino Interior-Northern Lake- 335 AM PDT Thu May 20 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... ...WIND ADVISORY IS CANCELLED... * WHAT...Temperatures in the low to mid 30s will result in frost formation. * WHERE...Northwestern Mendocino Interior and Northern Lake Counties. * WHEN...Until 9 AM PDT this morning. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ112-201600- /O.CAN.KEKA.WI.Y.0010.000000T0000Z-210521T0000Z/ /O.NEW.KEKA.WI.Y.0011.210520T1900Z-210521T0000Z/ Southwestern Mendocino Interior- 335 AM PDT Thu May 20 2021 ...WIND ADVISORY IN EFFECT FROM NOON TODAY TO 5 PM PDT THIS AFTERNOON... * WHAT...Northwest winds 15 to 25 mph with gusts up to 40 to 45 mph expected. * WHERE...Southwestern Mendocino Interior County. * WHEN...From noon today to 5 PM PDT this afternoon. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ CAZ102-104>108-111-201600- /O.CON.KEKA.FR.Y.0036.000000T0000Z-210520T1600Z/ Del Norte Interior-Southwestern Humboldt- Northern Humboldt Interior-Southern Humboldt Interior- Northern Trinity-Southern Trinity-Northeastern Mendocino Interior- 335 AM PDT Thu May 20 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * WHAT...Temperatures in the low to mid 30s will result in frost formation. * WHERE...Sheltered portions of Southern Trinity, Del Norte Interior, Northeastern Mendocino Interior, Northern Humboldt Interior, Southwestern Humboldt, Northern Trinity and Southern Humboldt Interior Counties. * WHEN...Until 9 AM PDT this morning. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
1 follow-up statement
352 WWUS76 KEKA 202109 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 209 PM PDT Thu May 20 2021 CAZ112-113-115-202215- /O.CAN.KEKA.WI.Y.0011.000000T0000Z-210521T0000Z/ Southwestern Mendocino Interior-Southeastern Mendocino Interior- Southern Lake- 209 PM PDT Thu May 20 2021 ...WIND ADVISORY IS CANCELLED... $$ CAZ102-105>108-110-111-210515- /O.NEW.KEKA.FR.Y.0037.210521T0800Z-210521T1600Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior-Northern Trinity-Southern Trinity- Northwestern Mendocino Interior-Northeastern Mendocino Interior- 209 PM PDT Thu May 20 2021 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM PDT FRIDAY... * WHAT...Temperatures as low as 29 will result in frost formation. * WHERE...Del Norte Interior, Northern Humboldt Interior, Southern Humboldt Interior, Northern Trinity, Southern Trinity, Northwestern Mendocino Interior and Northeastern Mendocino Interior Counties. * WHEN...From 1 AM to 9 AM PDT Friday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 8:08 PM PDT | Gale Warning | EKA | 24 hr | |
| May 19, 8:08 PM PDT | Small Craft Advisory | EKA | 15 hr | |
| May 20, 2:09 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Lake, Mendocino, Trinity | 19 hr |
Nearby
Wind Advisories in California, 2021Every wind advisory 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.