Alert archive / California / Special Weather Statements in 2017

Special Weather Statement, NWS Eureka, CA

April 9, 2017Del Norte County, California

NWS Eureka, CA issued this special weather statement at Apr 9, 2017, 11:24 PM PDT for Del Norte County, California. It was in force for 36 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
Apr 9, 2017, 11:24 PM PDT (06:24 UTC)
Expired
Apr 10, 2017, 12:00 AM PDT
In force
36 min
Issued by
NWS Eureka, CA

County Del Norte County, CA

The radar

The Medford radar (KMAX), 120 km from the middle of the area, began a volume at 06:24 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 text

As transmitted.

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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 Apr 9, 3:50 PM PDT, 7 hours 34 minutes earlier.

Area forecast discussion, Apr 9, 3:50 PM PDT, 7 hours 34 minutes before
AREA FORECAST DISCUSSION
National Weather Service Eureka CA
350 PM PDT Sun Apr 9 2017

.SYNOPSIS...After a dry start to the day, rainfall will develop
by this evening along with high elevation mountain snows and
gusty winds. Precipitation will taper off on Monday, but rains
will return area-wide by Tuesday and persist through Thursday.

&&

.DISCUSSION...A frontal band of clouds and rain continues to move
toward the Redwood Coast. IR satellite imagery indicates the
coldest cloud tops continue to lift NE toward OR as the associated
upper trof continues to become more negatively tilted. Still,
moderate to heavy rains are indicated in a narrow band offshore. A
lightning strike or two have been detected within this line. Have
added isolated thunder to the the N coastal waters zones for this
evening, but have left thunder out of the land forecast. Rainfall
amounts will range from one half inch to one inch across much of
Del Norte County along with terrain favored areas of Humboldt
County. Amounts closer to one quarter of an inch are expected
elsewhere (including around Humboldt Bay where downslope flow will
reduce rain amounts). Snow levels will start out this evening
around 4000 feet and slowly drop to between 3000 and 3500 feet
across the N 1/2 of the area by Monday morning. Some snow amounts
above 6 inches are possible across interior Del Norte, but these
locations will be above 4500 feet. A few locations down to 3500
feet may receive a couple of inches of snow by Monday morning.

The models have latched onto an approaching low pressure system on
Tuesday. Have bumped up pops for Tuesday, especially for the
afternoon. This system will pivot NNE on the front side of a
deepening upper trof and another low approaches the area. Although
rain intensity will decrease late Wednesday night and early
Thursday, PoPs will remain high until the second system weakens
and heads E Thursday night. Forecast uncertainty increases next
weekend, but early indications are that at least Saturday might be
mostly dry. Stay tuned! /SEC

&&

.AVIATION...A cold front will bring a period of rain and MVFR
ceilings, perhaps with a few dips to IFR, late this afternoon and
evening. A few strikes of lightning will also be possible at CEC and
ACV during the evening. Rain will transition to showers overnight
along the coast, and these will diminish by early tomorrow morning.
Ceilings will likely remain low through the night, but will become
more scattered/broken as showers develop. At UKI, rain will not
arrive until late in the overnight period, and will diminish by mid
morning. /BRC

&&

.MARINE...A cold front continues to approach the waters this
afternoon, and southerly winds will continue to increase to near
Gale strength as it does. Sustained wind speeds of 30 kt with
occasional gusts to 40 kt will be possible late this afternoon and
evening across mainly the northern outer waters, with a few gale
force gusts possible in the inner waters. Some of the stronger gusts
are likely to occur along a broken line of thunderstorms along the
frontal boundary. Seas will build and become steep as a result, but
while seas will be steepest today, the largest significant wave
heights are expected to occur Monday as a long period westerly swell
builds into the waters.  However, wind speeds will be light by this
time, and as such, the Gale Warning has been trimmed so that it
expires Sunday evening as opposed to Monday. Mariners should be
aware that seas will remain somewhat large through Monday, even
though winds will be diminishing will before then.

After a break in storms Monday, Tuesday through the end of the week
looks active, with a series of storm systems set to impact the
coast. While neither of these storms looks particularly strong, at
least relative to these waters, winds will be somewhat breezy,
likely fluctuating between 15 and 30 kt as multiple cold fronts move
through the waters. Winds will shift to the north at some point
Thursday or Friday, again remaining somewhat breezy but not likely
to Gale strength. This will keep seas somewhat elevated and within
Small Craft Advisory levels through the end of the work week. /BRC

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...None.
NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory until 3 PM Monday for PZZ450-455-475.
     Gale Warning until 9 PM this evening for PZZ470.

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.png
Hazardous weather outlook, Apr 9, 3:12 AM PDT, 20 hours 12 minutes before
Hazardous Weather Outlook
National Weather Service Eureka CA
312 AM PDT Sun Apr 9 2017

CAZ103-104-109-112-101015-
Northern Humboldt Coast-Southwestern Humboldt-Mendocino Coast-
Southwestern Mendocino Interior-
312 AM PDT Sun Apr 9 2017

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...Monday through Saturday.

An approaching storm system may bring some gusty winds moderate
intensity rainfall to the region during the middle of the week.

.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.

CAZ102-105-106-110-111-113-101015-
Del Norte Interior-Northern Humboldt Interior-
Southern Humboldt Interior-Northwestern Mendocino Interior-
Northeastern Mendocino Interior-Southeastern Mendocino Interior-
312 AM PDT Sun Apr 9 2017

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...Monday through Saturday.

An approaching storm system may bring some gusty winds moderate
intensity rainfall to the region during the middle of the week.

.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.

CAZ107-108-101015-
Northern Trinity-Southern Trinity-
312 AM PDT Sun Apr 9 2017

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...Monday through Saturday.

Higher elevation snowfall may develop during portions of the week.
Most area passes will see little if any impact.

.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.

CAZ101-101015-
Coastal Del Norte-
312 AM PDT Sun Apr 9 2017

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...Monday through Saturday.

An approaching storm system may bring some gusty winds moderate
intensity rainfall to the region during the middle of the week.

.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.

In the hours before

Special weather statement, Apr 9, 11:24 PM PDT, 0 minutes before
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The office that day

Everything else NWS Eureka, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 9, 8:54 PM PDTSmall Craft AdvisoryEKA34 hr
Apr 10, 2:14 PM PDTGale WatchEKA13 hr

Nearby

Special Weather Statements in California, 2017Every special weather statement in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.