Alert archive / California / Special Weather Statements in 2015

Special Weather Statement, NWS Eureka, CA

April 6, 2015Humboldt County, California

NWS Eureka, CA issued this special weather statement at Apr 6, 2015, 4:09 PM PDT for Humboldt 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 6, 2015, 4:09 PM PDT (23:09 UTC)
Expired: Apr 6, 2015, 4:45 PM PDT
In force: 36 min
Issued by: NWS Eureka, CA

County Humboldt County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 16 km from the middle of the area, began a volume at 23:09 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, in the capitals the NWS used until 2016.

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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 6, 3:33 PM PDT, 36 minutes earlier.

Area forecast discussion, Apr 6, 3:33 PM PDT, 36 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
333 PM PDT MON APR 6 2015

.SYNOPSIS...A PASSING FRONT WILL BRING WIDESPREAD RAIN...GUSTY
RIDGETOP WINDS...AND SNOW TO THE REGION THROUGH TONIGHT. THE
ACTIVE WEATHER PATTERN WILL CONTINUE TUESDAY AS THE UPPER LEVEL
TROUGH MOVES OVERHEAD WITH THUNDERSTORMS POSSIBLE IN THE
AFTERNOON. CONDITIONS WILL BEGIN TO DRY OUT BY THE MIDDLE OF THE
WEEK.

&&

.DISCUSSION...WATER VAPOR SATELLITE SHOWS AN UPPER LEVEL LOW AND
ASSOCIATED SURFACE LOW OFF THE COAST OF OREGON. A WARM FRONT IS
MOVING OVER THE AREA CURRENTLY BRINGING WARM AIR ADVECTION. THE
COLD FRONT IS JUST STARTING TO MOVE ONSHORE BRINGING THE BULK OF
THE RAIN AND SNOWFALL. THE WARM FRONT CONTINUES TO BRING WARM AIR
RAISING SNOW LEVELS AND SOME SHOWERS TO THE EASTERN PORTION OF THE
AREA THIS AFTERNOON. THIS EVENING AND TONIGHT THE HEAVIER BAND OF
RAIN WILL CONTINUE TO MOVE EAST BRINGING MODERATE TO HEAVY RAIN
THROUGH MUCH OF THE NIGHT. THE CHALLENGE WILL BE THE SNOW LEVELS.
THEY ARE RISING THIS AFTERNOON AND WILL CONTINUE TO RISE THIS
EVENING AS THE HEAVIEST RAIN MOVES IN. TONIGHT THE SNOW LEVELS
FALL AND IT IS DIFFICULT TO DETERMINE HOW MUCH THEY WILL FALL
BEFORE THE PRECIP ENDS. THEY MAY DROP AS LOW AS 3000 FT LATE
TONIGHT BUT ACCUMULATING SNOW WILL LIKELY REMAIN ABOVE 3500 FT.
FOR NOW WILL LEAVE THE ADVISORY AT 3500 FT WITH WORDING THAT SNOW
LEVELS WILL FLUCTUATE.

BEHIND THE FRONT ON TUESDAY THERE WILL LIKELY BE A BRIEF BREAK IN
THE RAIN IN THE MORNING BEFORE SHOWERS START BECOMING MORE
FREQUENT LATE IN MORNING AND EARLY IN THE AFTERNOON AS THE UPPER
LEVEL TROUGH MOVES OVERHEAD. WITH THE COLD AIR MOVING IN ALOFT
INSTABILITY INCREASES QUITE A BIT. THE NAM IS SHOWING OVER 600
J/KG OF CAPE OVER THE INLAND AREAS. 500 MB TEMPS ARE AS LOW AS
-31C MAKING SMALL HAIL A POSSIBILITY ONCE AGAIN THE AFTERNOON. THE
BEST INSTABILITY LOOKS TO START IN THE SOUTH IN THE MORNING AND
MOVE NORTH IN THE AFTERNOON. WITH THE TROUGH NEARLY OVERHEAD THE
SHEAR WILL BE LIGHT AND THEREFORE THE STORMS ARE NOT EXPECTED TO
BE VERY STRONG.

TUESDAY NIGHT AND WEDNESDAY MODELS ARE INDICATING THERE WILL BE
SOME LINGERING SHOWERS AROUND AS THE HIGH PRESSURE STARTS TO BUILD
INTO THE AREA. THERE ATMOSPHERE LOOKS TO REMAIN WELL ENOUGH MIXED
THAT FROST WILL NOT BE PARTICULARLY WIDESPREAD...BUT THIS WILL
NEED TO BE WATCHED. THURSDAY MORNING THERE IS A BETTER CHANCE FOR
SOME FROST...ALTHOUGH WINDS ARE LIGHT AND WITH THE RECENT RAIN FOG
MAY FORM.

FRIDAY THE NEXT SYSTEM STARTS TO APPROACH THE AREA. CURRENT
MODELS SHOW THE SYSTEM SPLITTING AND A PIECE OF ENERGY DIVING
SOUTH AND CUTTING. THE NORTHERN STREAM LOOKS TO CLIP US FOR THE
WEEKEND SO HAVE INCREASED POPS A BIT. MONDAY A BRIEF PERIOD OF
HIGH PRESSURE RETURNS BEFORE ANOTHER WEAK SYSTEM LOOKS TO MOVE IN
ON TUESDAY. MKK

&&

.AVIATION...A STORM SYSTEM IS BRINGING PRECIPITATION TO NORTHWEST
CALIFORNIA. EXPECT BORDERLINE VFR/MVFR THIS EVENING AND OVERNIGHT
WITH PERIODS OF IFR POSSIBLE IN THE HEAVIEST SHOWERS. CONDITIONS
SHOULD IMPROVE LATE TONIGHT AS THE STORM SYSTEM MOVES INLAND.
ADDITIONALLY, INSTABILITY WILL ALLOW FOR A SLIGHT CHANCE OF
THUNDERSTORMS ALONG THE COAST THIS EVENING AND TONIGHT.

&&

.MARINE...THE AFTERNOON BUOY OBSERVATIONS ARE GENERALLY REPORTING
SOUTHERLY GALE TO NEAR GALE CONDITIONS AND SEAS RANGING FROM 8-12
FT. THE 1825Z ASCAT PASS SHOWED WINDS RANGING FROM 20-30 KT WITH
HIGHER SPEEDS AROUND CAPE MENDOCINO. THIS RANGED FROM BEING IN
LINE WITH OUR FORECAST TO 10 KT BELOW THE FORECAST. THINK THIS IS
PARTLY DUE TO TIMING ERROR WITH THE FRONT AND THE FACT THAT THE
MAIN WIND BAND MAY NOT BE AS ELONGATED AS ORIGINALLY EXPECTED.
REGARDLESS, TRENDED DOWNWARD SLIGHTLY WITH THE WINDS IN THE SHORT
TERM TO REFLECT THIS. A STRENGTHENING LOW APPROACHING THE COAST
HAS BROUGHT SOUTHERLY GALE CONDITIONS TO THE WATERS. EVEN THOUGH
WINDS ARE BORDERLINE GALE SOUTH OF THE CAPE, DECIDED TO KEEP THE
GL.W'S UP TO ACCOUNT FOR THE HIGHER GUSTS AND STEEP SEAS. EXPECT
THE WARNINGS TO BE DOWNGRADED TO ADVISORIES IN THE UPCOMING HOURS.
THIS WILL BE DUE TO THE WINDS AND SEAS TRENDING DOWNWARD THIS
EVENING AND TONIGHT AS THE LOW MOVES INLAND. THE MODELS ARE
SHOWING DISCREPANCIES IN THE WIND STRENGTH AND DIRECTION ON
TUESDAY. WENT WITH A BLEND OF THE MODELS DURING THIS TIME PERIOD.
BEYOND THAT, MODELS ARE IN GOOD AGREEMENT SHOWING HIGH PRESSURE
BRINGING LIGHT TO MODERATE WINDS AND LOW SEAS TUESDAY THROUGH
FRIDAY.

&&

.EKA WATCHES/WARNINGS/ADVISORIES...

CA...

WINTER WEATHER ADVISORY FOR CAZ003-004.
WIND ADVISORY FOR CAZ003.

NORTHWEST CALIFORNIA COASTAL WATERS...

GALE WARNING FOR PZZ450-455-470-475.

&&

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

Hazardous weather outlook, Apr 6, 2:32 PM PDT, 1 hour 37 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE EUREKA CA
232 PM PDT MON APR 6 2015

CAZ001-002-072145-
REDWOOD COAST-MENDOCINO COAST-
232 PM PDT MON APR 6 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A PASSING FRONT WILL BRING WIDESPREAD RAIN TO NORTHWEST CALIFORNIA
TODAY. SOUTHERLY WINDS WILL INCREASE TODAY WITH GUSTY CONDITIONS
ACROSS HIGHER TERRAIN.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

ISOLATED THUNDERSTORMS WILL BE POSSIBLE ON TUESDAY.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

CAZ076-072145-
MENDOCINO INTERIOR-
232 PM PDT MON APR 6 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A PASSING FRONT WILL BRING WIDESPREAD RAIN TO NORTHWEST CALIFORNIA
TODAY. SOUTHERLY WINDS WILL INCREASE TODAY WITH GUSTY CONDITIONS
ACROSS HIGHER TERRAIN.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

ISOLATED THUNDERSTORMS WILL BE POSSIBLE ON TUESDAY.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

CAZ004-072145-
UPPER TRINITY RIVER-
232 PM PDT MON APR 6 2015

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM PDT TUESDAY...

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...TUESDAY THROUGH SUNDAY.

A WINTER WEATHER ADVISORY IS CURRENTLY IN EFFECT THROUGH TUESDAY.

ISOLATED THUNDERSTORMS WILL BE POSSIBLE ON TUESDAY. SMALL HAIL IS
POSSIBLE WITH THESE THUNDERSTORMS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

CAZ003-072145-
NORTH COAST INTERIOR-
232 PM PDT MON APR 6 2015

...WIND ADVISORY IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON...
...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM PDT TUESDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A WINTER WEATHER ADVISORY IS CURRENTLY IN EFFECT.
A WIND ADVISORY IS CURRENTLY IN EFFECT.

A WIND ADVISORY IS CURRENTLY IN EFFECT THROUGH THIS AFTERNOON.

A WINTER WEATHER ADVISORY IS CURRENTLY IN EFFECT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

A WINTER WEATHER ADVISORY IS CURRENTLY IN EFFECT THROUGH TUESDAY.

ISOLATED THUNDERSTORMS WILL BE POSSIBLE ON TUESDAY. SMALL HAIL IS
POSSIBLE WITH THESE THUNDERSTORMS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Apr 6, 4:09 PM PDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA
409 PM PDT MON APR 6 2015

CAZ001-003-062345-
NORTH COAST INTERIOR CA-REDWOOD COAST CA-
409 PM PDT MON APR 6 2015

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN HUMBOLDT COUNTY
UNTIL 445 PM PDT...

AT 406 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
LINE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 11 MILES
WEST OF PETROLIA TO 6 MILES NORTHWEST OF SHELTER COVE MOVING
NORTHEAST AT 30 MPH.

WIND GUSTS UP TO 55 MPH WILL BE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
HONEYDEW...PETROLIA AND CAPETOWN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
OFFICE IN EUREKA CALIFORNIA.

&&

LAT...LON 4048 12439 4052 12438 4061 12433 4061 12432
      4028 12402 4009 12410 4011 12411 4013 12419
      4016 12422 4026 12436 4032 12435 4039 12437
      4041 12439 4045 12441
TIME...MOT...LOC 2306Z 210DEG 26KT 4035 12450 4008 12417

RPA

The office that day

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

Issued	Product	Office	Lasted
Apr 6, 3:53 AM PDT	Winter Weather Advisory	EKA	33 hr
Apr 6, 4:56 AM PDT	Special Marine Warning	EKA	19 min
Apr 6, 5:14 AM PDT	Special Marine Warning	EKA	16 min
Apr 6, 3:57 PM PDT	Special Marine Warning	EKA	33 min

Nearby

Special Weather Statements in California, 2015 Every special weather statement in 2015

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.