Alert archive / California / Special Weather Statements in 2018
Special Weather Statement, NWS Eureka, CA
NWS Eureka, CA issued this special weather statement at Jan 25, 2018, 4:19 AM PST for Humboldt County, California. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jan 25, 2018, 4:19 AM PST (12:19 UTC)
- Expired
- Jan 25, 2018, 4:45 AM PST
- In force
- 26 min
- Issued by
- NWS Eureka, CA
County Humboldt County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 31 km from the middle of the area, began a volume at 12:21 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 12:00Z, 0.3 hours before the alert went out and 374 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
- 6 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1027 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Jan 25, 3:46 AM PST, 33 minutes earlier.
Area forecast discussion, Jan 25, 3:46 AM PST, 33 minutes before
AREA FORECAST DISCUSSION
National Weather Service Eureka CA
346 AM PST Thu Jan 25 2018
.SYNOPSIS...Showery weather will continue into Friday before the
next storm system arrives on Saturday. Drier weather should return
on Sunday and may persist through next week.
&&
.DISCUSSION...An upper level trough will bring additional
precipitation to northwest California today, which is already
being observed this morning. Isolated thunderstorms are currently
ongoing across the across ocean and along the immediate coast
while rain and snow showers are occurring inland. Snow levels
will continue to fall throughout the day and bottom out around
2,000 to 2,500 feet thus the Winter Weather Advisory remains for
interior Del Norte, Humboldt, and Trinity counties through Friday
morning. Precipitation will then briefly taper off on Friday
before the next storm system arrives for Saturday. There is still
some question about the timing, placement and strength of this
system but it does appear likely that areas north of Cape
Mendocino will see rain, with chances diminishing as you move
south. Models are suggesting that we will see a stretch of drier
weather starting Sunday, with Del Norte County possibly seeing
some light mid week rain.
&&
.AVIATION...Generally wet weather will persist throughout
the day as multiple upper level shortwaves prolong shower activity
across northwest California. Thunderstorms will be possible near
coastal areas primarily through the mid to late morning hours. VFR
conditions will be possible across much of the region, however,
heavier showers will bring MVFR and possibly IFR throughout the day.
/KML
&&
.MARINE...Moderate and generally southwest/west winds will persist
through Friday before a frontal boundary brings the next round of
increasing south winds for late Friday night. Steep waves will
gradually subside today, however, an incoming swell system will
bring quite large seas. Expect 15 to 17 foot seas to develop by this
afternoon. Seas will subside on Friday but remain near 10 to 12 feet
into the early half of the weekend. Small craft advisories remain in
effect through the weekend primarily for larger seas. /KML
&&
.EKA WATCHES/WARNINGS/ADVISORIES...
CA...Winter Weather Advisory until 4 AM PST Friday for CAZ102-105>108-
111.
NORTHWEST CALIFORNIA COASTAL WATERS...Small Craft Advisory until 9 PM PST Saturday for PZZ455-475.
Small Craft Advisory until 3 AM PST Sunday for PZZ450-470.
&&
Visit us at http://www.weather.gov/eureka
Follow us on Facebook and Twitter at:
http://www.facebook.com/NWSEureka
http://www.twitter.com/nwseureka
For forecast zone information
see the forecast zone map online:
http://www.weather.gov/eureka/zonemap.pngHazardous weather outlook, Jan 25, 3:14 AM PST, 1 hour 5 minutes before
Hazardous Weather Outlook National Weather Service Eureka CA 314 AM PST Thu Jan 25 2018 CAZ102-105>108-111-261115- Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior-Northern Trinity-Southern Trinity- Northeastern Mendocino Interior- 314 AM PST Thu Jan 25 2018 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 AM PST FRIDAY... This hazardous weather outlook is for northwest California. .DAY ONE...Today and tonight. A Winter Weather Advisory is currently in effect. Periods of heavy snow will lower visibilities at times. Slippery road conditions. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. A Winter Weather Advisory will remain in effect through Friday morning. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. CAZ101-103-104-109-261115- Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Mendocino Coast- 314 AM PST Thu Jan 25 2018 This hazardous weather outlook is for northwest California. .DAY ONE...Today and tonight. Isolated thunderstorms and small hail during periods of heavy rain showers. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. CAZ110-112-113-261115- Northwestern Mendocino Interior-Southwestern Mendocino Interior- Southeastern Mendocino Interior- 314 AM PST Thu Jan 25 2018 This hazardous weather outlook is for northwest California. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Special weather statement, Jan 25, 4:19 AM PST, 0 minutes before
Special Weather Statement
National Weather Service Eureka CA
419 AM PST THU JAN 25 2018
CAZ103-251245-
Northern Humboldt Coast CA-
419 AM PST THU JAN 25 2018
...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL HUMBOLDT COUNTY
UNTIL 445 AM PST...
At 418 AM PST, Doppler radar was tracking a strong thunderstorm near
Eureka, moving northeast at 25 mph.
Pea to half inch hail will be possible with this storm.
Locations impacted include...
Eureka, Myrtletown, Cutten, Humboldt Hill, Pine Hills, Freshwater and
Bayview.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 4083 12412 4075 12402 4072 12402 4072 12403
4066 12425 4070 12431
TIME...MOT...LOC 1218Z 245DEG 22KT 4072 12418
KRNearby
Special Weather Statements in California, 2018Every special weather statement 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.