Alert archive / California / Winter Weather Advisories in 2018
Winter Weather Advisory 2, NWS Eureka, CA
NWS Eureka, CA issued this winter weather advisory at Jan 20, 2018, 1:47 PM PST for Trinity County, California. It took effect at Jan 21, 2018, 8:00 AM PST. It was in force for 14 hr.
The area
The counties it named.
The facts
- Issued
- Jan 20, 2018, 1:47 PM PST (21:47 UTC)
- In effect from
- Jan 21, 2018, 8:00 AM PST
- Expired
- Jan 21, 2018, 10:00 PM PST
- In force
- 14 hr
- Issued by
- NWS Eureka, CA
County Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 101 km from the middle of the area, began a volume at 21:50 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
Medford/Jackson, OR (KMFR), launched 12:00Z, 9.8 hours before the alert went out and 193 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
- 643 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Eureka, CA wrote its last area forecast discussion before this winter weather advisory went out at Jan 19, 3:37 PM PST, 22 hours 10 minutes earlier.
Area forecast discussion, Jan 19, 3:37 PM PST, 22 hours 10 minutes before
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</html>Hazardous weather outlook, Jan 19, 2:22 PM PST, 23 hours 25 minutes before
Hazardous Weather Outlook National Weather Service Eureka CA 222 PM PST Fri Jan 19 2018 CAZ102-105-106-202230- Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior- 222 PM PST Fri Jan 19 2018 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 PM PST THIS EVENING... This hazardous weather outlook is for northwest California. .DAY ONE...This afternoon and tonight. A Winter Weather Advisory is currently in effect. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Additional high elevation snow will be possible on Sunday. Strong southerly winds are expected on Sunday with gusts to 55 mph expected on exposed ridges. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. CAZ107-108-202230- Northern Trinity-Southern Trinity- 222 PM PST Fri Jan 19 2018 ...WINTER STORM WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... This hazardous weather outlook is for northwest California. .DAY ONE...This afternoon and tonight. No hazardous weather is expected through tonight. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. A Winter Storm Watch is currently in effect for areas of 3,000 feet. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. CAZ101-103-104-109-202230- Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 222 PM PST Fri Jan 19 2018 This hazardous weather outlook is for northwest California. .DAY ONE...This afternoon and tonight. No hazardous weather is expected through tonight. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Strong southerly winds are expected on Sunday with gusts to 45 mph expected on exposed coastal areas. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. CAZ110>113-202230- Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southwestern Mendocino Interior-Southeastern Mendocino Interior- 222 PM PST Fri Jan 19 2018 This hazardous weather outlook is for northwest California. .DAY ONE...This afternoon and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 20, 2:45 AM PST | Gale Warning | EKA | 39 hr | |
| Jan 20, 2:51 AM PST | Wind Advisory | EKA | Del Norte, Humboldt | 37 hr |
| Jan 20, 1:47 PM PST | Winter Storm Warning | EKA | 32 hr |
Nearby
Winter Weather Advisories in California, 2018Every winter weather advisory in 2018
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.